1 // SPDX-License-Identifier: GPL-2.0
3 * hosting IBM Z kernel virtual machines (s390x)
5 * Copyright IBM Corp. 2008, 2020
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
9 * Heiko Carstens <heiko.carstens@de.ibm.com>
10 * Christian Ehrhardt <ehrhardt@de.ibm.com>
11 * Jason J. Herne <jjherne@us.ibm.com>
14 #define KMSG_COMPONENT "kvm-s390"
15 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
17 #include <linux/compiler.h>
18 #include <linux/err.h>
20 #include <linux/hrtimer.h>
21 #include <linux/init.h>
22 #include <linux/kvm.h>
23 #include <linux/kvm_host.h>
24 #include <linux/mman.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/random.h>
28 #include <linux/slab.h>
29 #include <linux/timer.h>
30 #include <linux/vmalloc.h>
31 #include <linux/bitmap.h>
32 #include <linux/sched/signal.h>
33 #include <linux/string.h>
35 #include <asm/asm-offsets.h>
36 #include <asm/lowcore.h>
38 #include <asm/pgtable.h>
41 #include <asm/switch_to.h>
44 #include <asm/cpacf.h>
45 #include <asm/timex.h>
51 #define CREATE_TRACE_POINTS
53 #include "trace-s390.h"
55 #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
57 #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
58 (KVM_MAX_VCPUS + LOCAL_IRQS))
60 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
61 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
63 struct kvm_stats_debugfs_item debugfs_entries[] = {
64 { "userspace_handled", VCPU_STAT(exit_userspace) },
65 { "exit_null", VCPU_STAT(exit_null) },
66 { "exit_validity", VCPU_STAT(exit_validity) },
67 { "exit_stop_request", VCPU_STAT(exit_stop_request) },
68 { "exit_external_request", VCPU_STAT(exit_external_request) },
69 { "exit_io_request", VCPU_STAT(exit_io_request) },
70 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
71 { "exit_instruction", VCPU_STAT(exit_instruction) },
72 { "exit_pei", VCPU_STAT(exit_pei) },
73 { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
74 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
75 { "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
76 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
77 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
78 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
79 { "halt_no_poll_steal", VCPU_STAT(halt_no_poll_steal) },
80 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
81 { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
82 { "instruction_lctl", VCPU_STAT(instruction_lctl) },
83 { "instruction_stctl", VCPU_STAT(instruction_stctl) },
84 { "instruction_stctg", VCPU_STAT(instruction_stctg) },
85 { "deliver_ckc", VCPU_STAT(deliver_ckc) },
86 { "deliver_cputm", VCPU_STAT(deliver_cputm) },
87 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
88 { "deliver_external_call", VCPU_STAT(deliver_external_call) },
89 { "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
90 { "deliver_virtio", VCPU_STAT(deliver_virtio) },
91 { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
92 { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
93 { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
94 { "deliver_program", VCPU_STAT(deliver_program) },
95 { "deliver_io", VCPU_STAT(deliver_io) },
96 { "deliver_machine_check", VCPU_STAT(deliver_machine_check) },
97 { "exit_wait_state", VCPU_STAT(exit_wait_state) },
98 { "inject_ckc", VCPU_STAT(inject_ckc) },
99 { "inject_cputm", VCPU_STAT(inject_cputm) },
100 { "inject_external_call", VCPU_STAT(inject_external_call) },
101 { "inject_float_mchk", VM_STAT(inject_float_mchk) },
102 { "inject_emergency_signal", VCPU_STAT(inject_emergency_signal) },
103 { "inject_io", VM_STAT(inject_io) },
104 { "inject_mchk", VCPU_STAT(inject_mchk) },
105 { "inject_pfault_done", VM_STAT(inject_pfault_done) },
106 { "inject_program", VCPU_STAT(inject_program) },
107 { "inject_restart", VCPU_STAT(inject_restart) },
108 { "inject_service_signal", VM_STAT(inject_service_signal) },
109 { "inject_set_prefix", VCPU_STAT(inject_set_prefix) },
110 { "inject_stop_signal", VCPU_STAT(inject_stop_signal) },
111 { "inject_pfault_init", VCPU_STAT(inject_pfault_init) },
112 { "inject_virtio", VM_STAT(inject_virtio) },
113 { "instruction_epsw", VCPU_STAT(instruction_epsw) },
114 { "instruction_gs", VCPU_STAT(instruction_gs) },
115 { "instruction_io_other", VCPU_STAT(instruction_io_other) },
116 { "instruction_lpsw", VCPU_STAT(instruction_lpsw) },
117 { "instruction_lpswe", VCPU_STAT(instruction_lpswe) },
118 { "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
119 { "instruction_ptff", VCPU_STAT(instruction_ptff) },
120 { "instruction_stidp", VCPU_STAT(instruction_stidp) },
121 { "instruction_sck", VCPU_STAT(instruction_sck) },
122 { "instruction_sckpf", VCPU_STAT(instruction_sckpf) },
123 { "instruction_spx", VCPU_STAT(instruction_spx) },
124 { "instruction_stpx", VCPU_STAT(instruction_stpx) },
125 { "instruction_stap", VCPU_STAT(instruction_stap) },
126 { "instruction_iske", VCPU_STAT(instruction_iske) },
127 { "instruction_ri", VCPU_STAT(instruction_ri) },
128 { "instruction_rrbe", VCPU_STAT(instruction_rrbe) },
129 { "instruction_sske", VCPU_STAT(instruction_sske) },
130 { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
131 { "instruction_essa", VCPU_STAT(instruction_essa) },
132 { "instruction_stsi", VCPU_STAT(instruction_stsi) },
133 { "instruction_stfl", VCPU_STAT(instruction_stfl) },
134 { "instruction_tb", VCPU_STAT(instruction_tb) },
135 { "instruction_tpi", VCPU_STAT(instruction_tpi) },
136 { "instruction_tprot", VCPU_STAT(instruction_tprot) },
137 { "instruction_tsch", VCPU_STAT(instruction_tsch) },
138 { "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
139 { "instruction_sie", VCPU_STAT(instruction_sie) },
140 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
141 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
142 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
143 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
144 { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
145 { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
146 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
147 { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
148 { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
149 { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
150 { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
151 { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
152 { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
153 { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
154 { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
155 { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
156 { "instruction_diag_10", VCPU_STAT(diagnose_10) },
157 { "instruction_diag_44", VCPU_STAT(diagnose_44) },
158 { "instruction_diag_9c", VCPU_STAT(diagnose_9c) },
159 { "diag_9c_ignored", VCPU_STAT(diagnose_9c_ignored) },
160 { "instruction_diag_258", VCPU_STAT(diagnose_258) },
161 { "instruction_diag_308", VCPU_STAT(diagnose_308) },
162 { "instruction_diag_500", VCPU_STAT(diagnose_500) },
163 { "instruction_diag_other", VCPU_STAT(diagnose_other) },
167 struct kvm_s390_tod_clock_ext {
173 /* allow nested virtualization in KVM (if enabled by user space) */
175 module_param(nested, int, S_IRUGO);
176 MODULE_PARM_DESC(nested, "Nested virtualization support");
178 /* allow 1m huge page guest backing, if !nested */
180 module_param(hpage, int, 0444);
181 MODULE_PARM_DESC(hpage, "1m huge page backing support");
183 /* maximum percentage of steal time for polling. >100 is treated like 100 */
184 static u8 halt_poll_max_steal = 10;
185 module_param(halt_poll_max_steal, byte, 0644);
186 MODULE_PARM_DESC(halt_poll_max_steal, "Maximum percentage of steal time to allow polling");
188 /* if set to true, the GISA will be initialized and used if available */
189 static bool use_gisa = true;
190 module_param(use_gisa, bool, 0644);
191 MODULE_PARM_DESC(use_gisa, "Use the GISA if the host supports it.");
194 * For now we handle at most 16 double words as this is what the s390 base
195 * kernel handles and stores in the prefix page. If we ever need to go beyond
196 * this, this requires changes to code, but the external uapi can stay.
198 #define SIZE_INTERNAL 16
201 * Base feature mask that defines default mask for facilities. Consists of the
202 * defines in FACILITIES_KVM and the non-hypervisor managed bits.
204 static unsigned long kvm_s390_fac_base[SIZE_INTERNAL] = { FACILITIES_KVM };
206 * Extended feature mask. Consists of the defines in FACILITIES_KVM_CPUMODEL
207 * and defines the facilities that can be enabled via a cpu model.
209 static unsigned long kvm_s390_fac_ext[SIZE_INTERNAL] = { FACILITIES_KVM_CPUMODEL };
211 static unsigned long kvm_s390_fac_size(void)
213 BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_MASK_SIZE_U64);
214 BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_LIST_SIZE_U64);
215 BUILD_BUG_ON(SIZE_INTERNAL * sizeof(unsigned long) >
216 sizeof(S390_lowcore.stfle_fac_list));
218 return SIZE_INTERNAL;
221 /* available cpu features supported by kvm */
222 static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
223 /* available subfunctions indicated via query / "test bit" */
224 static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
226 static struct gmap_notifier gmap_notifier;
227 static struct gmap_notifier vsie_gmap_notifier;
228 debug_info_t *kvm_s390_dbf;
229 debug_info_t *kvm_s390_dbf_uv;
231 /* Section: not file related */
232 int kvm_arch_hardware_enable(void)
234 /* every s390 is virtualization enabled ;-) */
238 int kvm_arch_check_processor_compat(void *opaque)
243 /* forward declarations */
244 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
246 static int sca_switch_to_extended(struct kvm *kvm);
248 static void kvm_clock_sync_scb(struct kvm_s390_sie_block *scb, u64 delta)
253 * The TOD jumps by delta, we have to compensate this by adding
254 * -delta to the epoch.
258 /* sign-extension - we're adding to signed values below */
263 if (scb->ecd & ECD_MEF) {
264 scb->epdx += delta_idx;
265 if (scb->epoch < delta)
271 * This callback is executed during stop_machine(). All CPUs are therefore
272 * temporarily stopped. In order not to change guest behavior, we have to
273 * disable preemption whenever we touch the epoch of kvm and the VCPUs,
274 * so a CPU won't be stopped while calculating with the epoch.
276 static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
280 struct kvm_vcpu *vcpu;
282 unsigned long long *delta = v;
284 list_for_each_entry(kvm, &vm_list, vm_list) {
285 kvm_for_each_vcpu(i, vcpu, kvm) {
286 kvm_clock_sync_scb(vcpu->arch.sie_block, *delta);
288 kvm->arch.epoch = vcpu->arch.sie_block->epoch;
289 kvm->arch.epdx = vcpu->arch.sie_block->epdx;
291 if (vcpu->arch.cputm_enabled)
292 vcpu->arch.cputm_start += *delta;
293 if (vcpu->arch.vsie_block)
294 kvm_clock_sync_scb(vcpu->arch.vsie_block,
301 static struct notifier_block kvm_clock_notifier = {
302 .notifier_call = kvm_clock_sync,
305 int kvm_arch_hardware_setup(void *opaque)
307 gmap_notifier.notifier_call = kvm_gmap_notifier;
308 gmap_register_pte_notifier(&gmap_notifier);
309 vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier;
310 gmap_register_pte_notifier(&vsie_gmap_notifier);
311 atomic_notifier_chain_register(&s390_epoch_delta_notifier,
312 &kvm_clock_notifier);
316 void kvm_arch_hardware_unsetup(void)
318 gmap_unregister_pte_notifier(&gmap_notifier);
319 gmap_unregister_pte_notifier(&vsie_gmap_notifier);
320 atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
321 &kvm_clock_notifier);
324 static void allow_cpu_feat(unsigned long nr)
326 set_bit_inv(nr, kvm_s390_available_cpu_feat);
329 static inline int plo_test_bit(unsigned char nr)
331 register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
335 /* Parameter registers are ignored for "test bit" */
345 static __always_inline void __insn32_query(unsigned int opcode, u8 *query)
347 register unsigned long r0 asm("0") = 0; /* query function */
348 register unsigned long r1 asm("1") = (unsigned long) query;
351 /* Parameter regs are ignored */
352 " .insn rrf,%[opc] << 16,2,4,6,0\n"
354 : "d" (r0), "a" (r1), [opc] "i" (opcode)
358 #define INSN_SORTL 0xb938
359 #define INSN_DFLTCC 0xb939
361 static void kvm_s390_cpu_feat_init(void)
365 for (i = 0; i < 256; ++i) {
367 kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
370 if (test_facility(28)) /* TOD-clock steering */
371 ptff(kvm_s390_available_subfunc.ptff,
372 sizeof(kvm_s390_available_subfunc.ptff),
375 if (test_facility(17)) { /* MSA */
376 __cpacf_query(CPACF_KMAC, (cpacf_mask_t *)
377 kvm_s390_available_subfunc.kmac);
378 __cpacf_query(CPACF_KMC, (cpacf_mask_t *)
379 kvm_s390_available_subfunc.kmc);
380 __cpacf_query(CPACF_KM, (cpacf_mask_t *)
381 kvm_s390_available_subfunc.km);
382 __cpacf_query(CPACF_KIMD, (cpacf_mask_t *)
383 kvm_s390_available_subfunc.kimd);
384 __cpacf_query(CPACF_KLMD, (cpacf_mask_t *)
385 kvm_s390_available_subfunc.klmd);
387 if (test_facility(76)) /* MSA3 */
388 __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *)
389 kvm_s390_available_subfunc.pckmo);
390 if (test_facility(77)) { /* MSA4 */
391 __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *)
392 kvm_s390_available_subfunc.kmctr);
393 __cpacf_query(CPACF_KMF, (cpacf_mask_t *)
394 kvm_s390_available_subfunc.kmf);
395 __cpacf_query(CPACF_KMO, (cpacf_mask_t *)
396 kvm_s390_available_subfunc.kmo);
397 __cpacf_query(CPACF_PCC, (cpacf_mask_t *)
398 kvm_s390_available_subfunc.pcc);
400 if (test_facility(57)) /* MSA5 */
401 __cpacf_query(CPACF_PRNO, (cpacf_mask_t *)
402 kvm_s390_available_subfunc.ppno);
404 if (test_facility(146)) /* MSA8 */
405 __cpacf_query(CPACF_KMA, (cpacf_mask_t *)
406 kvm_s390_available_subfunc.kma);
408 if (test_facility(155)) /* MSA9 */
409 __cpacf_query(CPACF_KDSA, (cpacf_mask_t *)
410 kvm_s390_available_subfunc.kdsa);
412 if (test_facility(150)) /* SORTL */
413 __insn32_query(INSN_SORTL, kvm_s390_available_subfunc.sortl);
415 if (test_facility(151)) /* DFLTCC */
416 __insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc);
418 if (MACHINE_HAS_ESOP)
419 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
421 * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
422 * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
424 if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
425 !test_facility(3) || !nested)
427 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
428 if (sclp.has_64bscao)
429 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
431 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
433 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
435 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
437 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
439 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
441 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
443 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
445 * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
446 * all skey handling functions read/set the skey from the PGSTE
447 * instead of the real storage key.
449 * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make
450 * pages being detected as preserved although they are resident.
452 * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will
453 * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY.
455 * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and
456 * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be
457 * correctly shadowed. We can do that for the PGSTE but not for PTE.I.
459 * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We
460 * cannot easily shadow the SCA because of the ipte lock.
464 int kvm_arch_init(void *opaque)
468 kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
472 kvm_s390_dbf_uv = debug_register("kvm-uv", 32, 1, 7 * sizeof(long));
473 if (!kvm_s390_dbf_uv)
476 if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view) ||
477 debug_register_view(kvm_s390_dbf_uv, &debug_sprintf_view))
480 kvm_s390_cpu_feat_init();
482 /* Register floating interrupt controller interface. */
483 rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
485 pr_err("A FLIC registration call failed with rc=%d\n", rc);
489 rc = kvm_s390_gib_init(GAL_ISC);
500 void kvm_arch_exit(void)
502 kvm_s390_gib_destroy();
503 debug_unregister(kvm_s390_dbf);
504 debug_unregister(kvm_s390_dbf_uv);
507 /* Section: device related */
508 long kvm_arch_dev_ioctl(struct file *filp,
509 unsigned int ioctl, unsigned long arg)
511 if (ioctl == KVM_S390_ENABLE_SIE)
512 return s390_enable_sie();
516 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
521 case KVM_CAP_S390_PSW:
522 case KVM_CAP_S390_GMAP:
523 case KVM_CAP_SYNC_MMU:
524 #ifdef CONFIG_KVM_S390_UCONTROL
525 case KVM_CAP_S390_UCONTROL:
527 case KVM_CAP_ASYNC_PF:
528 case KVM_CAP_SYNC_REGS:
529 case KVM_CAP_ONE_REG:
530 case KVM_CAP_ENABLE_CAP:
531 case KVM_CAP_S390_CSS_SUPPORT:
532 case KVM_CAP_IOEVENTFD:
533 case KVM_CAP_DEVICE_CTRL:
534 case KVM_CAP_S390_IRQCHIP:
535 case KVM_CAP_VM_ATTRIBUTES:
536 case KVM_CAP_MP_STATE:
537 case KVM_CAP_IMMEDIATE_EXIT:
538 case KVM_CAP_S390_INJECT_IRQ:
539 case KVM_CAP_S390_USER_SIGP:
540 case KVM_CAP_S390_USER_STSI:
541 case KVM_CAP_S390_SKEYS:
542 case KVM_CAP_S390_IRQ_STATE:
543 case KVM_CAP_S390_USER_INSTR0:
544 case KVM_CAP_S390_CMMA_MIGRATION:
545 case KVM_CAP_S390_AIS:
546 case KVM_CAP_S390_AIS_MIGRATION:
547 case KVM_CAP_S390_VCPU_RESETS:
550 case KVM_CAP_S390_HPAGE_1M:
552 if (hpage && !kvm_is_ucontrol(kvm))
555 case KVM_CAP_S390_MEM_OP:
558 case KVM_CAP_NR_VCPUS:
559 case KVM_CAP_MAX_VCPUS:
560 case KVM_CAP_MAX_VCPU_ID:
561 r = KVM_S390_BSCA_CPU_SLOTS;
562 if (!kvm_s390_use_sca_entries())
564 else if (sclp.has_esca && sclp.has_64bscao)
565 r = KVM_S390_ESCA_CPU_SLOTS;
567 case KVM_CAP_S390_COW:
568 r = MACHINE_HAS_ESOP;
570 case KVM_CAP_S390_VECTOR_REGISTERS:
573 case KVM_CAP_S390_RI:
574 r = test_facility(64);
576 case KVM_CAP_S390_GS:
577 r = test_facility(133);
579 case KVM_CAP_S390_BPB:
580 r = test_facility(82);
582 case KVM_CAP_S390_PROTECTED:
583 r = is_prot_virt_host();
591 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
594 gfn_t cur_gfn, last_gfn;
595 unsigned long gaddr, vmaddr;
596 struct gmap *gmap = kvm->arch.gmap;
597 DECLARE_BITMAP(bitmap, _PAGE_ENTRIES);
599 /* Loop over all guest segments */
600 cur_gfn = memslot->base_gfn;
601 last_gfn = memslot->base_gfn + memslot->npages;
602 for (; cur_gfn <= last_gfn; cur_gfn += _PAGE_ENTRIES) {
603 gaddr = gfn_to_gpa(cur_gfn);
604 vmaddr = gfn_to_hva_memslot(memslot, cur_gfn);
605 if (kvm_is_error_hva(vmaddr))
608 bitmap_zero(bitmap, _PAGE_ENTRIES);
609 gmap_sync_dirty_log_pmd(gmap, bitmap, gaddr, vmaddr);
610 for (i = 0; i < _PAGE_ENTRIES; i++) {
611 if (test_bit(i, bitmap))
612 mark_page_dirty(kvm, cur_gfn + i);
615 if (fatal_signal_pending(current))
621 /* Section: vm related */
622 static void sca_del_vcpu(struct kvm_vcpu *vcpu);
625 * Get (and clear) the dirty memory log for a memory slot.
627 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
628 struct kvm_dirty_log *log)
632 struct kvm_memory_slot *memslot;
635 if (kvm_is_ucontrol(kvm))
638 mutex_lock(&kvm->slots_lock);
641 if (log->slot >= KVM_USER_MEM_SLOTS)
644 r = kvm_get_dirty_log(kvm, log, &is_dirty, &memslot);
648 /* Clear the dirty log */
650 n = kvm_dirty_bitmap_bytes(memslot);
651 memset(memslot->dirty_bitmap, 0, n);
655 mutex_unlock(&kvm->slots_lock);
659 static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
662 struct kvm_vcpu *vcpu;
664 kvm_for_each_vcpu(i, vcpu, kvm) {
665 kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
669 int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
677 case KVM_CAP_S390_IRQCHIP:
678 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
679 kvm->arch.use_irqchip = 1;
682 case KVM_CAP_S390_USER_SIGP:
683 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
684 kvm->arch.user_sigp = 1;
687 case KVM_CAP_S390_VECTOR_REGISTERS:
688 mutex_lock(&kvm->lock);
689 if (kvm->created_vcpus) {
691 } else if (MACHINE_HAS_VX) {
692 set_kvm_facility(kvm->arch.model.fac_mask, 129);
693 set_kvm_facility(kvm->arch.model.fac_list, 129);
694 if (test_facility(134)) {
695 set_kvm_facility(kvm->arch.model.fac_mask, 134);
696 set_kvm_facility(kvm->arch.model.fac_list, 134);
698 if (test_facility(135)) {
699 set_kvm_facility(kvm->arch.model.fac_mask, 135);
700 set_kvm_facility(kvm->arch.model.fac_list, 135);
702 if (test_facility(148)) {
703 set_kvm_facility(kvm->arch.model.fac_mask, 148);
704 set_kvm_facility(kvm->arch.model.fac_list, 148);
706 if (test_facility(152)) {
707 set_kvm_facility(kvm->arch.model.fac_mask, 152);
708 set_kvm_facility(kvm->arch.model.fac_list, 152);
713 mutex_unlock(&kvm->lock);
714 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
715 r ? "(not available)" : "(success)");
717 case KVM_CAP_S390_RI:
719 mutex_lock(&kvm->lock);
720 if (kvm->created_vcpus) {
722 } else if (test_facility(64)) {
723 set_kvm_facility(kvm->arch.model.fac_mask, 64);
724 set_kvm_facility(kvm->arch.model.fac_list, 64);
727 mutex_unlock(&kvm->lock);
728 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
729 r ? "(not available)" : "(success)");
731 case KVM_CAP_S390_AIS:
732 mutex_lock(&kvm->lock);
733 if (kvm->created_vcpus) {
736 set_kvm_facility(kvm->arch.model.fac_mask, 72);
737 set_kvm_facility(kvm->arch.model.fac_list, 72);
740 mutex_unlock(&kvm->lock);
741 VM_EVENT(kvm, 3, "ENABLE: AIS %s",
742 r ? "(not available)" : "(success)");
744 case KVM_CAP_S390_GS:
746 mutex_lock(&kvm->lock);
747 if (kvm->created_vcpus) {
749 } else if (test_facility(133)) {
750 set_kvm_facility(kvm->arch.model.fac_mask, 133);
751 set_kvm_facility(kvm->arch.model.fac_list, 133);
754 mutex_unlock(&kvm->lock);
755 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
756 r ? "(not available)" : "(success)");
758 case KVM_CAP_S390_HPAGE_1M:
759 mutex_lock(&kvm->lock);
760 if (kvm->created_vcpus)
762 else if (!hpage || kvm->arch.use_cmma || kvm_is_ucontrol(kvm))
766 down_write(&kvm->mm->mmap_sem);
767 kvm->mm->context.allow_gmap_hpage_1m = 1;
768 up_write(&kvm->mm->mmap_sem);
770 * We might have to create fake 4k page
771 * tables. To avoid that the hardware works on
772 * stale PGSTEs, we emulate these instructions.
774 kvm->arch.use_skf = 0;
775 kvm->arch.use_pfmfi = 0;
777 mutex_unlock(&kvm->lock);
778 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_HPAGE %s",
779 r ? "(not available)" : "(success)");
781 case KVM_CAP_S390_USER_STSI:
782 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
783 kvm->arch.user_stsi = 1;
786 case KVM_CAP_S390_USER_INSTR0:
787 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0");
788 kvm->arch.user_instr0 = 1;
789 icpt_operexc_on_all_vcpus(kvm);
799 static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
803 switch (attr->attr) {
804 case KVM_S390_VM_MEM_LIMIT_SIZE:
806 VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
807 kvm->arch.mem_limit);
808 if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
818 static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
822 switch (attr->attr) {
823 case KVM_S390_VM_MEM_ENABLE_CMMA:
828 VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
829 mutex_lock(&kvm->lock);
830 if (kvm->created_vcpus)
832 else if (kvm->mm->context.allow_gmap_hpage_1m)
835 kvm->arch.use_cmma = 1;
836 /* Not compatible with cmma. */
837 kvm->arch.use_pfmfi = 0;
840 mutex_unlock(&kvm->lock);
842 case KVM_S390_VM_MEM_CLR_CMMA:
847 if (!kvm->arch.use_cmma)
850 VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
851 mutex_lock(&kvm->lock);
852 idx = srcu_read_lock(&kvm->srcu);
853 s390_reset_cmma(kvm->arch.gmap->mm);
854 srcu_read_unlock(&kvm->srcu, idx);
855 mutex_unlock(&kvm->lock);
858 case KVM_S390_VM_MEM_LIMIT_SIZE: {
859 unsigned long new_limit;
861 if (kvm_is_ucontrol(kvm))
864 if (get_user(new_limit, (u64 __user *)attr->addr))
867 if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
868 new_limit > kvm->arch.mem_limit)
874 /* gmap_create takes last usable address */
875 if (new_limit != KVM_S390_NO_MEM_LIMIT)
879 mutex_lock(&kvm->lock);
880 if (!kvm->created_vcpus) {
881 /* gmap_create will round the limit up */
882 struct gmap *new = gmap_create(current->mm, new_limit);
887 gmap_remove(kvm->arch.gmap);
889 kvm->arch.gmap = new;
893 mutex_unlock(&kvm->lock);
894 VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
895 VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
896 (void *) kvm->arch.gmap->asce);
906 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
908 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm)
910 struct kvm_vcpu *vcpu;
913 kvm_s390_vcpu_block_all(kvm);
915 kvm_for_each_vcpu(i, vcpu, kvm) {
916 kvm_s390_vcpu_crypto_setup(vcpu);
917 /* recreate the shadow crycb by leaving the VSIE handler */
918 kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu);
921 kvm_s390_vcpu_unblock_all(kvm);
924 static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
926 mutex_lock(&kvm->lock);
927 switch (attr->attr) {
928 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
929 if (!test_kvm_facility(kvm, 76)) {
930 mutex_unlock(&kvm->lock);
934 kvm->arch.crypto.crycb->aes_wrapping_key_mask,
935 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
936 kvm->arch.crypto.aes_kw = 1;
937 VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
939 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
940 if (!test_kvm_facility(kvm, 76)) {
941 mutex_unlock(&kvm->lock);
945 kvm->arch.crypto.crycb->dea_wrapping_key_mask,
946 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
947 kvm->arch.crypto.dea_kw = 1;
948 VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
950 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
951 if (!test_kvm_facility(kvm, 76)) {
952 mutex_unlock(&kvm->lock);
955 kvm->arch.crypto.aes_kw = 0;
956 memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
957 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
958 VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
960 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
961 if (!test_kvm_facility(kvm, 76)) {
962 mutex_unlock(&kvm->lock);
965 kvm->arch.crypto.dea_kw = 0;
966 memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
967 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
968 VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
970 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
971 if (!ap_instructions_available()) {
972 mutex_unlock(&kvm->lock);
975 kvm->arch.crypto.apie = 1;
977 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
978 if (!ap_instructions_available()) {
979 mutex_unlock(&kvm->lock);
982 kvm->arch.crypto.apie = 0;
985 mutex_unlock(&kvm->lock);
989 kvm_s390_vcpu_crypto_reset_all(kvm);
990 mutex_unlock(&kvm->lock);
994 static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req)
997 struct kvm_vcpu *vcpu;
999 kvm_for_each_vcpu(cx, vcpu, kvm)
1000 kvm_s390_sync_request(req, vcpu);
1004 * Must be called with kvm->srcu held to avoid races on memslots, and with
1005 * kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration.
1007 static int kvm_s390_vm_start_migration(struct kvm *kvm)
1009 struct kvm_memory_slot *ms;
1010 struct kvm_memslots *slots;
1011 unsigned long ram_pages = 0;
1014 /* migration mode already enabled */
1015 if (kvm->arch.migration_mode)
1017 slots = kvm_memslots(kvm);
1018 if (!slots || !slots->used_slots)
1021 if (!kvm->arch.use_cmma) {
1022 kvm->arch.migration_mode = 1;
1025 /* mark all the pages in active slots as dirty */
1026 for (slotnr = 0; slotnr < slots->used_slots; slotnr++) {
1027 ms = slots->memslots + slotnr;
1028 if (!ms->dirty_bitmap)
1031 * The second half of the bitmap is only used on x86,
1032 * and would be wasted otherwise, so we put it to good
1033 * use here to keep track of the state of the storage
1036 memset(kvm_second_dirty_bitmap(ms), 0xff, kvm_dirty_bitmap_bytes(ms));
1037 ram_pages += ms->npages;
1039 atomic64_set(&kvm->arch.cmma_dirty_pages, ram_pages);
1040 kvm->arch.migration_mode = 1;
1041 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION);
1046 * Must be called with kvm->slots_lock to avoid races with ourselves and
1047 * kvm_s390_vm_start_migration.
1049 static int kvm_s390_vm_stop_migration(struct kvm *kvm)
1051 /* migration mode already disabled */
1052 if (!kvm->arch.migration_mode)
1054 kvm->arch.migration_mode = 0;
1055 if (kvm->arch.use_cmma)
1056 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION);
1060 static int kvm_s390_vm_set_migration(struct kvm *kvm,
1061 struct kvm_device_attr *attr)
1065 mutex_lock(&kvm->slots_lock);
1066 switch (attr->attr) {
1067 case KVM_S390_VM_MIGRATION_START:
1068 res = kvm_s390_vm_start_migration(kvm);
1070 case KVM_S390_VM_MIGRATION_STOP:
1071 res = kvm_s390_vm_stop_migration(kvm);
1076 mutex_unlock(&kvm->slots_lock);
1081 static int kvm_s390_vm_get_migration(struct kvm *kvm,
1082 struct kvm_device_attr *attr)
1084 u64 mig = kvm->arch.migration_mode;
1086 if (attr->attr != KVM_S390_VM_MIGRATION_STATUS)
1089 if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig)))
1094 static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1096 struct kvm_s390_vm_tod_clock gtod;
1098 if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod)))
1101 if (!test_kvm_facility(kvm, 139) && gtod.epoch_idx)
1103 kvm_s390_set_tod_clock(kvm, >od);
1105 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx",
1106 gtod.epoch_idx, gtod.tod);
1111 static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1115 if (copy_from_user(>od_high, (void __user *)attr->addr,
1121 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
1126 static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1128 struct kvm_s390_vm_tod_clock gtod = { 0 };
1130 if (copy_from_user(>od.tod, (void __user *)attr->addr,
1134 kvm_s390_set_tod_clock(kvm, >od);
1135 VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod.tod);
1139 static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1146 switch (attr->attr) {
1147 case KVM_S390_VM_TOD_EXT:
1148 ret = kvm_s390_set_tod_ext(kvm, attr);
1150 case KVM_S390_VM_TOD_HIGH:
1151 ret = kvm_s390_set_tod_high(kvm, attr);
1153 case KVM_S390_VM_TOD_LOW:
1154 ret = kvm_s390_set_tod_low(kvm, attr);
1163 static void kvm_s390_get_tod_clock(struct kvm *kvm,
1164 struct kvm_s390_vm_tod_clock *gtod)
1166 struct kvm_s390_tod_clock_ext htod;
1170 get_tod_clock_ext((char *)&htod);
1172 gtod->tod = htod.tod + kvm->arch.epoch;
1173 gtod->epoch_idx = 0;
1174 if (test_kvm_facility(kvm, 139)) {
1175 gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
1176 if (gtod->tod < htod.tod)
1177 gtod->epoch_idx += 1;
1183 static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1185 struct kvm_s390_vm_tod_clock gtod;
1187 memset(>od, 0, sizeof(gtod));
1188 kvm_s390_get_tod_clock(kvm, >od);
1189 if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
1192 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x, TOD base: 0x%llx",
1193 gtod.epoch_idx, gtod.tod);
1197 static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1201 if (copy_to_user((void __user *)attr->addr, >od_high,
1204 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
1209 static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1213 gtod = kvm_s390_get_tod_clock_fast(kvm);
1214 if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
1216 VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
1221 static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1228 switch (attr->attr) {
1229 case KVM_S390_VM_TOD_EXT:
1230 ret = kvm_s390_get_tod_ext(kvm, attr);
1232 case KVM_S390_VM_TOD_HIGH:
1233 ret = kvm_s390_get_tod_high(kvm, attr);
1235 case KVM_S390_VM_TOD_LOW:
1236 ret = kvm_s390_get_tod_low(kvm, attr);
1245 static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1247 struct kvm_s390_vm_cpu_processor *proc;
1248 u16 lowest_ibc, unblocked_ibc;
1251 mutex_lock(&kvm->lock);
1252 if (kvm->created_vcpus) {
1256 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1261 if (!copy_from_user(proc, (void __user *)attr->addr,
1263 kvm->arch.model.cpuid = proc->cpuid;
1264 lowest_ibc = sclp.ibc >> 16 & 0xfff;
1265 unblocked_ibc = sclp.ibc & 0xfff;
1266 if (lowest_ibc && proc->ibc) {
1267 if (proc->ibc > unblocked_ibc)
1268 kvm->arch.model.ibc = unblocked_ibc;
1269 else if (proc->ibc < lowest_ibc)
1270 kvm->arch.model.ibc = lowest_ibc;
1272 kvm->arch.model.ibc = proc->ibc;
1274 memcpy(kvm->arch.model.fac_list, proc->fac_list,
1275 S390_ARCH_FAC_LIST_SIZE_BYTE);
1276 VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
1277 kvm->arch.model.ibc,
1278 kvm->arch.model.cpuid);
1279 VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1280 kvm->arch.model.fac_list[0],
1281 kvm->arch.model.fac_list[1],
1282 kvm->arch.model.fac_list[2]);
1287 mutex_unlock(&kvm->lock);
1291 static int kvm_s390_set_processor_feat(struct kvm *kvm,
1292 struct kvm_device_attr *attr)
1294 struct kvm_s390_vm_cpu_feat data;
1296 if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
1298 if (!bitmap_subset((unsigned long *) data.feat,
1299 kvm_s390_available_cpu_feat,
1300 KVM_S390_VM_CPU_FEAT_NR_BITS))
1303 mutex_lock(&kvm->lock);
1304 if (kvm->created_vcpus) {
1305 mutex_unlock(&kvm->lock);
1308 bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
1309 KVM_S390_VM_CPU_FEAT_NR_BITS);
1310 mutex_unlock(&kvm->lock);
1311 VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1318 static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
1319 struct kvm_device_attr *attr)
1321 mutex_lock(&kvm->lock);
1322 if (kvm->created_vcpus) {
1323 mutex_unlock(&kvm->lock);
1327 if (copy_from_user(&kvm->arch.model.subfuncs, (void __user *)attr->addr,
1328 sizeof(struct kvm_s390_vm_cpu_subfunc))) {
1329 mutex_unlock(&kvm->lock);
1332 mutex_unlock(&kvm->lock);
1334 VM_EVENT(kvm, 3, "SET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1335 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
1336 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
1337 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
1338 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
1339 VM_EVENT(kvm, 3, "SET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
1340 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
1341 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
1342 VM_EVENT(kvm, 3, "SET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
1343 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
1344 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
1345 VM_EVENT(kvm, 3, "SET: guest KMC subfunc 0x%16.16lx.%16.16lx",
1346 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
1347 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
1348 VM_EVENT(kvm, 3, "SET: guest KM subfunc 0x%16.16lx.%16.16lx",
1349 ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
1350 ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
1351 VM_EVENT(kvm, 3, "SET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
1352 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
1353 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
1354 VM_EVENT(kvm, 3, "SET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
1355 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
1356 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
1357 VM_EVENT(kvm, 3, "SET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
1358 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
1359 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
1360 VM_EVENT(kvm, 3, "SET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
1361 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
1362 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
1363 VM_EVENT(kvm, 3, "SET: guest KMF subfunc 0x%16.16lx.%16.16lx",
1364 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
1365 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
1366 VM_EVENT(kvm, 3, "SET: guest KMO subfunc 0x%16.16lx.%16.16lx",
1367 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
1368 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
1369 VM_EVENT(kvm, 3, "SET: guest PCC subfunc 0x%16.16lx.%16.16lx",
1370 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
1371 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
1372 VM_EVENT(kvm, 3, "SET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
1373 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
1374 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
1375 VM_EVENT(kvm, 3, "SET: guest KMA subfunc 0x%16.16lx.%16.16lx",
1376 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
1377 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
1378 VM_EVENT(kvm, 3, "SET: guest KDSA subfunc 0x%16.16lx.%16.16lx",
1379 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0],
1380 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]);
1381 VM_EVENT(kvm, 3, "SET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1382 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0],
1383 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1],
1384 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2],
1385 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]);
1386 VM_EVENT(kvm, 3, "SET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1387 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0],
1388 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1],
1389 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2],
1390 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]);
1395 static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1399 switch (attr->attr) {
1400 case KVM_S390_VM_CPU_PROCESSOR:
1401 ret = kvm_s390_set_processor(kvm, attr);
1403 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1404 ret = kvm_s390_set_processor_feat(kvm, attr);
1406 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1407 ret = kvm_s390_set_processor_subfunc(kvm, attr);
1413 static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1415 struct kvm_s390_vm_cpu_processor *proc;
1418 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1423 proc->cpuid = kvm->arch.model.cpuid;
1424 proc->ibc = kvm->arch.model.ibc;
1425 memcpy(&proc->fac_list, kvm->arch.model.fac_list,
1426 S390_ARCH_FAC_LIST_SIZE_BYTE);
1427 VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
1428 kvm->arch.model.ibc,
1429 kvm->arch.model.cpuid);
1430 VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1431 kvm->arch.model.fac_list[0],
1432 kvm->arch.model.fac_list[1],
1433 kvm->arch.model.fac_list[2]);
1434 if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
1441 static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
1443 struct kvm_s390_vm_cpu_machine *mach;
1446 mach = kzalloc(sizeof(*mach), GFP_KERNEL);
1451 get_cpu_id((struct cpuid *) &mach->cpuid);
1452 mach->ibc = sclp.ibc;
1453 memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
1454 S390_ARCH_FAC_LIST_SIZE_BYTE);
1455 memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
1456 sizeof(S390_lowcore.stfle_fac_list));
1457 VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx",
1458 kvm->arch.model.ibc,
1459 kvm->arch.model.cpuid);
1460 VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx",
1464 VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1468 if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
1475 static int kvm_s390_get_processor_feat(struct kvm *kvm,
1476 struct kvm_device_attr *attr)
1478 struct kvm_s390_vm_cpu_feat data;
1480 bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
1481 KVM_S390_VM_CPU_FEAT_NR_BITS);
1482 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
1484 VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1491 static int kvm_s390_get_machine_feat(struct kvm *kvm,
1492 struct kvm_device_attr *attr)
1494 struct kvm_s390_vm_cpu_feat data;
1496 bitmap_copy((unsigned long *) data.feat,
1497 kvm_s390_available_cpu_feat,
1498 KVM_S390_VM_CPU_FEAT_NR_BITS);
1499 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
1501 VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1508 static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
1509 struct kvm_device_attr *attr)
1511 if (copy_to_user((void __user *)attr->addr, &kvm->arch.model.subfuncs,
1512 sizeof(struct kvm_s390_vm_cpu_subfunc)))
1515 VM_EVENT(kvm, 3, "GET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1516 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
1517 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
1518 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
1519 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
1520 VM_EVENT(kvm, 3, "GET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
1521 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
1522 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
1523 VM_EVENT(kvm, 3, "GET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
1524 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
1525 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
1526 VM_EVENT(kvm, 3, "GET: guest KMC subfunc 0x%16.16lx.%16.16lx",
1527 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
1528 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
1529 VM_EVENT(kvm, 3, "GET: guest KM subfunc 0x%16.16lx.%16.16lx",
1530 ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
1531 ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
1532 VM_EVENT(kvm, 3, "GET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
1533 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
1534 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
1535 VM_EVENT(kvm, 3, "GET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
1536 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
1537 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
1538 VM_EVENT(kvm, 3, "GET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
1539 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
1540 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
1541 VM_EVENT(kvm, 3, "GET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
1542 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
1543 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
1544 VM_EVENT(kvm, 3, "GET: guest KMF subfunc 0x%16.16lx.%16.16lx",
1545 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
1546 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
1547 VM_EVENT(kvm, 3, "GET: guest KMO subfunc 0x%16.16lx.%16.16lx",
1548 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
1549 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
1550 VM_EVENT(kvm, 3, "GET: guest PCC subfunc 0x%16.16lx.%16.16lx",
1551 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
1552 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
1553 VM_EVENT(kvm, 3, "GET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
1554 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
1555 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
1556 VM_EVENT(kvm, 3, "GET: guest KMA subfunc 0x%16.16lx.%16.16lx",
1557 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
1558 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
1559 VM_EVENT(kvm, 3, "GET: guest KDSA subfunc 0x%16.16lx.%16.16lx",
1560 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0],
1561 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]);
1562 VM_EVENT(kvm, 3, "GET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1563 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0],
1564 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1],
1565 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2],
1566 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]);
1567 VM_EVENT(kvm, 3, "GET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1568 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0],
1569 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1],
1570 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2],
1571 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]);
1576 static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
1577 struct kvm_device_attr *attr)
1579 if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
1580 sizeof(struct kvm_s390_vm_cpu_subfunc)))
1583 VM_EVENT(kvm, 3, "GET: host PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1584 ((unsigned long *) &kvm_s390_available_subfunc.plo)[0],
1585 ((unsigned long *) &kvm_s390_available_subfunc.plo)[1],
1586 ((unsigned long *) &kvm_s390_available_subfunc.plo)[2],
1587 ((unsigned long *) &kvm_s390_available_subfunc.plo)[3]);
1588 VM_EVENT(kvm, 3, "GET: host PTFF subfunc 0x%16.16lx.%16.16lx",
1589 ((unsigned long *) &kvm_s390_available_subfunc.ptff)[0],
1590 ((unsigned long *) &kvm_s390_available_subfunc.ptff)[1]);
1591 VM_EVENT(kvm, 3, "GET: host KMAC subfunc 0x%16.16lx.%16.16lx",
1592 ((unsigned long *) &kvm_s390_available_subfunc.kmac)[0],
1593 ((unsigned long *) &kvm_s390_available_subfunc.kmac)[1]);
1594 VM_EVENT(kvm, 3, "GET: host KMC subfunc 0x%16.16lx.%16.16lx",
1595 ((unsigned long *) &kvm_s390_available_subfunc.kmc)[0],
1596 ((unsigned long *) &kvm_s390_available_subfunc.kmc)[1]);
1597 VM_EVENT(kvm, 3, "GET: host KM subfunc 0x%16.16lx.%16.16lx",
1598 ((unsigned long *) &kvm_s390_available_subfunc.km)[0],
1599 ((unsigned long *) &kvm_s390_available_subfunc.km)[1]);
1600 VM_EVENT(kvm, 3, "GET: host KIMD subfunc 0x%16.16lx.%16.16lx",
1601 ((unsigned long *) &kvm_s390_available_subfunc.kimd)[0],
1602 ((unsigned long *) &kvm_s390_available_subfunc.kimd)[1]);
1603 VM_EVENT(kvm, 3, "GET: host KLMD subfunc 0x%16.16lx.%16.16lx",
1604 ((unsigned long *) &kvm_s390_available_subfunc.klmd)[0],
1605 ((unsigned long *) &kvm_s390_available_subfunc.klmd)[1]);
1606 VM_EVENT(kvm, 3, "GET: host PCKMO subfunc 0x%16.16lx.%16.16lx",
1607 ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[0],
1608 ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[1]);
1609 VM_EVENT(kvm, 3, "GET: host KMCTR subfunc 0x%16.16lx.%16.16lx",
1610 ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[0],
1611 ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[1]);
1612 VM_EVENT(kvm, 3, "GET: host KMF subfunc 0x%16.16lx.%16.16lx",
1613 ((unsigned long *) &kvm_s390_available_subfunc.kmf)[0],
1614 ((unsigned long *) &kvm_s390_available_subfunc.kmf)[1]);
1615 VM_EVENT(kvm, 3, "GET: host KMO subfunc 0x%16.16lx.%16.16lx",
1616 ((unsigned long *) &kvm_s390_available_subfunc.kmo)[0],
1617 ((unsigned long *) &kvm_s390_available_subfunc.kmo)[1]);
1618 VM_EVENT(kvm, 3, "GET: host PCC subfunc 0x%16.16lx.%16.16lx",
1619 ((unsigned long *) &kvm_s390_available_subfunc.pcc)[0],
1620 ((unsigned long *) &kvm_s390_available_subfunc.pcc)[1]);
1621 VM_EVENT(kvm, 3, "GET: host PPNO subfunc 0x%16.16lx.%16.16lx",
1622 ((unsigned long *) &kvm_s390_available_subfunc.ppno)[0],
1623 ((unsigned long *) &kvm_s390_available_subfunc.ppno)[1]);
1624 VM_EVENT(kvm, 3, "GET: host KMA subfunc 0x%16.16lx.%16.16lx",
1625 ((unsigned long *) &kvm_s390_available_subfunc.kma)[0],
1626 ((unsigned long *) &kvm_s390_available_subfunc.kma)[1]);
1627 VM_EVENT(kvm, 3, "GET: host KDSA subfunc 0x%16.16lx.%16.16lx",
1628 ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[0],
1629 ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[1]);
1630 VM_EVENT(kvm, 3, "GET: host SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1631 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[0],
1632 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[1],
1633 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[2],
1634 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[3]);
1635 VM_EVENT(kvm, 3, "GET: host DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1636 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[0],
1637 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[1],
1638 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[2],
1639 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[3]);
1644 static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1648 switch (attr->attr) {
1649 case KVM_S390_VM_CPU_PROCESSOR:
1650 ret = kvm_s390_get_processor(kvm, attr);
1652 case KVM_S390_VM_CPU_MACHINE:
1653 ret = kvm_s390_get_machine(kvm, attr);
1655 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1656 ret = kvm_s390_get_processor_feat(kvm, attr);
1658 case KVM_S390_VM_CPU_MACHINE_FEAT:
1659 ret = kvm_s390_get_machine_feat(kvm, attr);
1661 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1662 ret = kvm_s390_get_processor_subfunc(kvm, attr);
1664 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1665 ret = kvm_s390_get_machine_subfunc(kvm, attr);
1671 static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1675 switch (attr->group) {
1676 case KVM_S390_VM_MEM_CTRL:
1677 ret = kvm_s390_set_mem_control(kvm, attr);
1679 case KVM_S390_VM_TOD:
1680 ret = kvm_s390_set_tod(kvm, attr);
1682 case KVM_S390_VM_CPU_MODEL:
1683 ret = kvm_s390_set_cpu_model(kvm, attr);
1685 case KVM_S390_VM_CRYPTO:
1686 ret = kvm_s390_vm_set_crypto(kvm, attr);
1688 case KVM_S390_VM_MIGRATION:
1689 ret = kvm_s390_vm_set_migration(kvm, attr);
1699 static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1703 switch (attr->group) {
1704 case KVM_S390_VM_MEM_CTRL:
1705 ret = kvm_s390_get_mem_control(kvm, attr);
1707 case KVM_S390_VM_TOD:
1708 ret = kvm_s390_get_tod(kvm, attr);
1710 case KVM_S390_VM_CPU_MODEL:
1711 ret = kvm_s390_get_cpu_model(kvm, attr);
1713 case KVM_S390_VM_MIGRATION:
1714 ret = kvm_s390_vm_get_migration(kvm, attr);
1724 static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1728 switch (attr->group) {
1729 case KVM_S390_VM_MEM_CTRL:
1730 switch (attr->attr) {
1731 case KVM_S390_VM_MEM_ENABLE_CMMA:
1732 case KVM_S390_VM_MEM_CLR_CMMA:
1733 ret = sclp.has_cmma ? 0 : -ENXIO;
1735 case KVM_S390_VM_MEM_LIMIT_SIZE:
1743 case KVM_S390_VM_TOD:
1744 switch (attr->attr) {
1745 case KVM_S390_VM_TOD_LOW:
1746 case KVM_S390_VM_TOD_HIGH:
1754 case KVM_S390_VM_CPU_MODEL:
1755 switch (attr->attr) {
1756 case KVM_S390_VM_CPU_PROCESSOR:
1757 case KVM_S390_VM_CPU_MACHINE:
1758 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1759 case KVM_S390_VM_CPU_MACHINE_FEAT:
1760 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1761 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1769 case KVM_S390_VM_CRYPTO:
1770 switch (attr->attr) {
1771 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
1772 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
1773 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
1774 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
1777 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
1778 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
1779 ret = ap_instructions_available() ? 0 : -ENXIO;
1786 case KVM_S390_VM_MIGRATION:
1797 static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1801 int srcu_idx, i, r = 0;
1803 if (args->flags != 0)
1806 /* Is this guest using storage keys? */
1807 if (!mm_uses_skeys(current->mm))
1808 return KVM_S390_GET_SKEYS_NONE;
1810 /* Enforce sane limit on memory allocation */
1811 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1814 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
1818 down_read(¤t->mm->mmap_sem);
1819 srcu_idx = srcu_read_lock(&kvm->srcu);
1820 for (i = 0; i < args->count; i++) {
1821 hva = gfn_to_hva(kvm, args->start_gfn + i);
1822 if (kvm_is_error_hva(hva)) {
1827 r = get_guest_storage_key(current->mm, hva, &keys[i]);
1831 srcu_read_unlock(&kvm->srcu, srcu_idx);
1832 up_read(¤t->mm->mmap_sem);
1835 r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
1836 sizeof(uint8_t) * args->count);
1845 static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1849 int srcu_idx, i, r = 0;
1852 if (args->flags != 0)
1855 /* Enforce sane limit on memory allocation */
1856 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1859 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
1863 r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
1864 sizeof(uint8_t) * args->count);
1870 /* Enable storage key handling for the guest */
1871 r = s390_enable_skey();
1876 down_read(¤t->mm->mmap_sem);
1877 srcu_idx = srcu_read_lock(&kvm->srcu);
1878 while (i < args->count) {
1880 hva = gfn_to_hva(kvm, args->start_gfn + i);
1881 if (kvm_is_error_hva(hva)) {
1886 /* Lowest order bit is reserved */
1887 if (keys[i] & 0x01) {
1892 r = set_guest_storage_key(current->mm, hva, keys[i], 0);
1894 r = fixup_user_fault(current, current->mm, hva,
1895 FAULT_FLAG_WRITE, &unlocked);
1902 srcu_read_unlock(&kvm->srcu, srcu_idx);
1903 up_read(¤t->mm->mmap_sem);
1910 * Base address and length must be sent at the start of each block, therefore
1911 * it's cheaper to send some clean data, as long as it's less than the size of
1914 #define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *))
1915 /* for consistency */
1916 #define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX)
1919 * Similar to gfn_to_memslot, but returns the index of a memslot also when the
1920 * address falls in a hole. In that case the index of one of the memslots
1921 * bordering the hole is returned.
1923 static int gfn_to_memslot_approx(struct kvm_memslots *slots, gfn_t gfn)
1925 int start = 0, end = slots->used_slots;
1926 int slot = atomic_read(&slots->lru_slot);
1927 struct kvm_memory_slot *memslots = slots->memslots;
1929 if (gfn >= memslots[slot].base_gfn &&
1930 gfn < memslots[slot].base_gfn + memslots[slot].npages)
1933 while (start < end) {
1934 slot = start + (end - start) / 2;
1936 if (gfn >= memslots[slot].base_gfn)
1942 if (gfn >= memslots[start].base_gfn &&
1943 gfn < memslots[start].base_gfn + memslots[start].npages) {
1944 atomic_set(&slots->lru_slot, start);
1950 static int kvm_s390_peek_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1951 u8 *res, unsigned long bufsize)
1953 unsigned long pgstev, hva, cur_gfn = args->start_gfn;
1956 while (args->count < bufsize) {
1957 hva = gfn_to_hva(kvm, cur_gfn);
1959 * We return an error if the first value was invalid, but we
1960 * return successfully if at least one value was copied.
1962 if (kvm_is_error_hva(hva))
1963 return args->count ? 0 : -EFAULT;
1964 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
1966 res[args->count++] = (pgstev >> 24) & 0x43;
1973 static unsigned long kvm_s390_next_dirty_cmma(struct kvm_memslots *slots,
1974 unsigned long cur_gfn)
1976 int slotidx = gfn_to_memslot_approx(slots, cur_gfn);
1977 struct kvm_memory_slot *ms = slots->memslots + slotidx;
1978 unsigned long ofs = cur_gfn - ms->base_gfn;
1980 if (ms->base_gfn + ms->npages <= cur_gfn) {
1982 /* If we are above the highest slot, wrap around */
1984 slotidx = slots->used_slots - 1;
1986 ms = slots->memslots + slotidx;
1989 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, ofs);
1990 while ((slotidx > 0) && (ofs >= ms->npages)) {
1992 ms = slots->memslots + slotidx;
1993 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, 0);
1995 return ms->base_gfn + ofs;
1998 static int kvm_s390_get_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1999 u8 *res, unsigned long bufsize)
2001 unsigned long mem_end, cur_gfn, next_gfn, hva, pgstev;
2002 struct kvm_memslots *slots = kvm_memslots(kvm);
2003 struct kvm_memory_slot *ms;
2005 if (unlikely(!slots->used_slots))
2008 cur_gfn = kvm_s390_next_dirty_cmma(slots, args->start_gfn);
2009 ms = gfn_to_memslot(kvm, cur_gfn);
2011 args->start_gfn = cur_gfn;
2014 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2015 mem_end = slots->memslots[0].base_gfn + slots->memslots[0].npages;
2017 while (args->count < bufsize) {
2018 hva = gfn_to_hva(kvm, cur_gfn);
2019 if (kvm_is_error_hva(hva))
2021 /* Decrement only if we actually flipped the bit to 0 */
2022 if (test_and_clear_bit(cur_gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
2023 atomic64_dec(&kvm->arch.cmma_dirty_pages);
2024 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
2026 /* Save the value */
2027 res[args->count++] = (pgstev >> 24) & 0x43;
2028 /* If the next bit is too far away, stop. */
2029 if (next_gfn > cur_gfn + KVM_S390_MAX_BIT_DISTANCE)
2031 /* If we reached the previous "next", find the next one */
2032 if (cur_gfn == next_gfn)
2033 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2034 /* Reached the end of memory or of the buffer, stop */
2035 if ((next_gfn >= mem_end) ||
2036 (next_gfn - args->start_gfn >= bufsize))
2039 /* Reached the end of the current memslot, take the next one. */
2040 if (cur_gfn - ms->base_gfn >= ms->npages) {
2041 ms = gfn_to_memslot(kvm, cur_gfn);
2050 * This function searches for the next page with dirty CMMA attributes, and
2051 * saves the attributes in the buffer up to either the end of the buffer or
2052 * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found;
2053 * no trailing clean bytes are saved.
2054 * In case no dirty bits were found, or if CMMA was not enabled or used, the
2055 * output buffer will indicate 0 as length.
2057 static int kvm_s390_get_cmma_bits(struct kvm *kvm,
2058 struct kvm_s390_cmma_log *args)
2060 unsigned long bufsize;
2061 int srcu_idx, peek, ret;
2064 if (!kvm->arch.use_cmma)
2066 /* Invalid/unsupported flags were specified */
2067 if (args->flags & ~KVM_S390_CMMA_PEEK)
2069 /* Migration mode query, and we are not doing a migration */
2070 peek = !!(args->flags & KVM_S390_CMMA_PEEK);
2071 if (!peek && !kvm->arch.migration_mode)
2073 /* CMMA is disabled or was not used, or the buffer has length zero */
2074 bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
2075 if (!bufsize || !kvm->mm->context.uses_cmm) {
2076 memset(args, 0, sizeof(*args));
2079 /* We are not peeking, and there are no dirty pages */
2080 if (!peek && !atomic64_read(&kvm->arch.cmma_dirty_pages)) {
2081 memset(args, 0, sizeof(*args));
2085 values = vmalloc(bufsize);
2089 down_read(&kvm->mm->mmap_sem);
2090 srcu_idx = srcu_read_lock(&kvm->srcu);
2092 ret = kvm_s390_peek_cmma(kvm, args, values, bufsize);
2094 ret = kvm_s390_get_cmma(kvm, args, values, bufsize);
2095 srcu_read_unlock(&kvm->srcu, srcu_idx);
2096 up_read(&kvm->mm->mmap_sem);
2098 if (kvm->arch.migration_mode)
2099 args->remaining = atomic64_read(&kvm->arch.cmma_dirty_pages);
2101 args->remaining = 0;
2103 if (copy_to_user((void __user *)args->values, values, args->count))
2111 * This function sets the CMMA attributes for the given pages. If the input
2112 * buffer has zero length, no action is taken, otherwise the attributes are
2113 * set and the mm->context.uses_cmm flag is set.
2115 static int kvm_s390_set_cmma_bits(struct kvm *kvm,
2116 const struct kvm_s390_cmma_log *args)
2118 unsigned long hva, mask, pgstev, i;
2120 int srcu_idx, r = 0;
2124 if (!kvm->arch.use_cmma)
2126 /* invalid/unsupported flags */
2127 if (args->flags != 0)
2129 /* Enforce sane limit on memory allocation */
2130 if (args->count > KVM_S390_CMMA_SIZE_MAX)
2133 if (args->count == 0)
2136 bits = vmalloc(array_size(sizeof(*bits), args->count));
2140 r = copy_from_user(bits, (void __user *)args->values, args->count);
2146 down_read(&kvm->mm->mmap_sem);
2147 srcu_idx = srcu_read_lock(&kvm->srcu);
2148 for (i = 0; i < args->count; i++) {
2149 hva = gfn_to_hva(kvm, args->start_gfn + i);
2150 if (kvm_is_error_hva(hva)) {
2156 pgstev = pgstev << 24;
2157 mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT;
2158 set_pgste_bits(kvm->mm, hva, mask, pgstev);
2160 srcu_read_unlock(&kvm->srcu, srcu_idx);
2161 up_read(&kvm->mm->mmap_sem);
2163 if (!kvm->mm->context.uses_cmm) {
2164 down_write(&kvm->mm->mmap_sem);
2165 kvm->mm->context.uses_cmm = 1;
2166 up_write(&kvm->mm->mmap_sem);
2173 static int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rcp, u16 *rrcp)
2175 struct kvm_vcpu *vcpu;
2181 * We ignore failures and try to destroy as many CPUs as possible.
2182 * At the same time we must not free the assigned resources when
2183 * this fails, as the ultravisor has still access to that memory.
2184 * So kvm_s390_pv_destroy_cpu can leave a "wanted" memory leak
2186 * We want to return the first failure rc and rrc, though.
2188 kvm_for_each_vcpu(i, vcpu, kvm) {
2189 mutex_lock(&vcpu->mutex);
2190 if (kvm_s390_pv_destroy_cpu(vcpu, &rc, &rrc) && !ret) {
2195 mutex_unlock(&vcpu->mutex);
2200 static int kvm_s390_cpus_to_pv(struct kvm *kvm, u16 *rc, u16 *rrc)
2205 struct kvm_vcpu *vcpu;
2207 kvm_for_each_vcpu(i, vcpu, kvm) {
2208 mutex_lock(&vcpu->mutex);
2209 r = kvm_s390_pv_create_cpu(vcpu, rc, rrc);
2210 mutex_unlock(&vcpu->mutex);
2215 kvm_s390_cpus_from_pv(kvm, &dummy, &dummy);
2219 static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd)
2223 void __user *argp = (void __user *)cmd->data;
2226 case KVM_PV_ENABLE: {
2228 if (kvm_s390_pv_is_protected(kvm))
2232 * FMT 4 SIE needs esca. As we never switch back to bsca from
2233 * esca, we need no cleanup in the error cases below
2235 r = sca_switch_to_extended(kvm);
2239 down_write(¤t->mm->mmap_sem);
2240 r = gmap_mark_unmergeable();
2241 up_write(¤t->mm->mmap_sem);
2245 r = kvm_s390_pv_init_vm(kvm, &cmd->rc, &cmd->rrc);
2249 r = kvm_s390_cpus_to_pv(kvm, &cmd->rc, &cmd->rrc);
2251 kvm_s390_pv_deinit_vm(kvm, &dummy, &dummy);
2253 /* we need to block service interrupts from now on */
2254 set_bit(IRQ_PEND_EXT_SERVICE, &kvm->arch.float_int.masked_irqs);
2257 case KVM_PV_DISABLE: {
2259 if (!kvm_s390_pv_is_protected(kvm))
2262 r = kvm_s390_cpus_from_pv(kvm, &cmd->rc, &cmd->rrc);
2264 * If a CPU could not be destroyed, destroy VM will also fail.
2265 * There is no point in trying to destroy it. Instead return
2266 * the rc and rrc from the first CPU that failed destroying.
2270 r = kvm_s390_pv_deinit_vm(kvm, &cmd->rc, &cmd->rrc);
2272 /* no need to block service interrupts any more */
2273 clear_bit(IRQ_PEND_EXT_SERVICE, &kvm->arch.float_int.masked_irqs);
2276 case KVM_PV_SET_SEC_PARMS: {
2277 struct kvm_s390_pv_sec_parm parms = {};
2281 if (!kvm_s390_pv_is_protected(kvm))
2285 if (copy_from_user(&parms, argp, sizeof(parms)))
2288 /* Currently restricted to 8KB */
2290 if (parms.length > PAGE_SIZE * 2)
2294 hdr = vmalloc(parms.length);
2299 if (!copy_from_user(hdr, (void __user *)parms.origin,
2301 r = kvm_s390_pv_set_sec_parms(kvm, hdr, parms.length,
2302 &cmd->rc, &cmd->rrc);
2307 case KVM_PV_UNPACK: {
2308 struct kvm_s390_pv_unp unp = {};
2311 if (!kvm_s390_pv_is_protected(kvm))
2315 if (copy_from_user(&unp, argp, sizeof(unp)))
2318 r = kvm_s390_pv_unpack(kvm, unp.addr, unp.size, unp.tweak,
2319 &cmd->rc, &cmd->rrc);
2322 case KVM_PV_VERIFY: {
2324 if (!kvm_s390_pv_is_protected(kvm))
2327 r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
2328 UVC_CMD_VERIFY_IMG, &cmd->rc, &cmd->rrc);
2329 KVM_UV_EVENT(kvm, 3, "PROTVIRT VERIFY: rc %x rrc %x", cmd->rc,
2333 case KVM_PV_PREP_RESET: {
2335 if (!kvm_s390_pv_is_protected(kvm))
2338 r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
2339 UVC_CMD_PREPARE_RESET, &cmd->rc, &cmd->rrc);
2340 KVM_UV_EVENT(kvm, 3, "PROTVIRT PREP RESET: rc %x rrc %x",
2344 case KVM_PV_UNSHARE_ALL: {
2346 if (!kvm_s390_pv_is_protected(kvm))
2349 r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm),
2350 UVC_CMD_SET_UNSHARE_ALL, &cmd->rc, &cmd->rrc);
2351 KVM_UV_EVENT(kvm, 3, "PROTVIRT UNSHARE: rc %x rrc %x",
2361 long kvm_arch_vm_ioctl(struct file *filp,
2362 unsigned int ioctl, unsigned long arg)
2364 struct kvm *kvm = filp->private_data;
2365 void __user *argp = (void __user *)arg;
2366 struct kvm_device_attr attr;
2370 case KVM_S390_INTERRUPT: {
2371 struct kvm_s390_interrupt s390int;
2374 if (copy_from_user(&s390int, argp, sizeof(s390int)))
2376 r = kvm_s390_inject_vm(kvm, &s390int);
2379 case KVM_CREATE_IRQCHIP: {
2380 struct kvm_irq_routing_entry routing;
2383 if (kvm->arch.use_irqchip) {
2384 /* Set up dummy routing. */
2385 memset(&routing, 0, sizeof(routing));
2386 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
2390 case KVM_SET_DEVICE_ATTR: {
2392 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2394 r = kvm_s390_vm_set_attr(kvm, &attr);
2397 case KVM_GET_DEVICE_ATTR: {
2399 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2401 r = kvm_s390_vm_get_attr(kvm, &attr);
2404 case KVM_HAS_DEVICE_ATTR: {
2406 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2408 r = kvm_s390_vm_has_attr(kvm, &attr);
2411 case KVM_S390_GET_SKEYS: {
2412 struct kvm_s390_skeys args;
2415 if (copy_from_user(&args, argp,
2416 sizeof(struct kvm_s390_skeys)))
2418 r = kvm_s390_get_skeys(kvm, &args);
2421 case KVM_S390_SET_SKEYS: {
2422 struct kvm_s390_skeys args;
2425 if (copy_from_user(&args, argp,
2426 sizeof(struct kvm_s390_skeys)))
2428 r = kvm_s390_set_skeys(kvm, &args);
2431 case KVM_S390_GET_CMMA_BITS: {
2432 struct kvm_s390_cmma_log args;
2435 if (copy_from_user(&args, argp, sizeof(args)))
2437 mutex_lock(&kvm->slots_lock);
2438 r = kvm_s390_get_cmma_bits(kvm, &args);
2439 mutex_unlock(&kvm->slots_lock);
2441 r = copy_to_user(argp, &args, sizeof(args));
2447 case KVM_S390_SET_CMMA_BITS: {
2448 struct kvm_s390_cmma_log args;
2451 if (copy_from_user(&args, argp, sizeof(args)))
2453 mutex_lock(&kvm->slots_lock);
2454 r = kvm_s390_set_cmma_bits(kvm, &args);
2455 mutex_unlock(&kvm->slots_lock);
2458 case KVM_S390_PV_COMMAND: {
2459 struct kvm_pv_cmd args;
2461 /* protvirt means user sigp */
2462 kvm->arch.user_cpu_state_ctrl = 1;
2464 if (!is_prot_virt_host()) {
2468 if (copy_from_user(&args, argp, sizeof(args))) {
2476 mutex_lock(&kvm->lock);
2477 r = kvm_s390_handle_pv(kvm, &args);
2478 mutex_unlock(&kvm->lock);
2479 if (copy_to_user(argp, &args, sizeof(args))) {
2492 static int kvm_s390_apxa_installed(void)
2494 struct ap_config_info info;
2496 if (ap_instructions_available()) {
2497 if (ap_qci(&info) == 0)
2505 * The format of the crypto control block (CRYCB) is specified in the 3 low
2506 * order bits of the CRYCB designation (CRYCBD) field as follows:
2507 * Format 0: Neither the message security assist extension 3 (MSAX3) nor the
2508 * AP extended addressing (APXA) facility are installed.
2509 * Format 1: The APXA facility is not installed but the MSAX3 facility is.
2510 * Format 2: Both the APXA and MSAX3 facilities are installed
2512 static void kvm_s390_set_crycb_format(struct kvm *kvm)
2514 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
2516 /* Clear the CRYCB format bits - i.e., set format 0 by default */
2517 kvm->arch.crypto.crycbd &= ~(CRYCB_FORMAT_MASK);
2519 /* Check whether MSAX3 is installed */
2520 if (!test_kvm_facility(kvm, 76))
2523 if (kvm_s390_apxa_installed())
2524 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
2526 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
2529 void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm,
2530 unsigned long *aqm, unsigned long *adm)
2532 struct kvm_s390_crypto_cb *crycb = kvm->arch.crypto.crycb;
2534 mutex_lock(&kvm->lock);
2535 kvm_s390_vcpu_block_all(kvm);
2537 switch (kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK) {
2538 case CRYCB_FORMAT2: /* APCB1 use 256 bits */
2539 memcpy(crycb->apcb1.apm, apm, 32);
2540 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx %016lx %016lx %016lx",
2541 apm[0], apm[1], apm[2], apm[3]);
2542 memcpy(crycb->apcb1.aqm, aqm, 32);
2543 VM_EVENT(kvm, 3, "SET CRYCB: aqm %016lx %016lx %016lx %016lx",
2544 aqm[0], aqm[1], aqm[2], aqm[3]);
2545 memcpy(crycb->apcb1.adm, adm, 32);
2546 VM_EVENT(kvm, 3, "SET CRYCB: adm %016lx %016lx %016lx %016lx",
2547 adm[0], adm[1], adm[2], adm[3]);
2550 case CRYCB_FORMAT0: /* Fall through both use APCB0 */
2551 memcpy(crycb->apcb0.apm, apm, 8);
2552 memcpy(crycb->apcb0.aqm, aqm, 2);
2553 memcpy(crycb->apcb0.adm, adm, 2);
2554 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx aqm %04x adm %04x",
2555 apm[0], *((unsigned short *)aqm),
2556 *((unsigned short *)adm));
2558 default: /* Can not happen */
2562 /* recreate the shadow crycb for each vcpu */
2563 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2564 kvm_s390_vcpu_unblock_all(kvm);
2565 mutex_unlock(&kvm->lock);
2567 EXPORT_SYMBOL_GPL(kvm_arch_crypto_set_masks);
2569 void kvm_arch_crypto_clear_masks(struct kvm *kvm)
2571 mutex_lock(&kvm->lock);
2572 kvm_s390_vcpu_block_all(kvm);
2574 memset(&kvm->arch.crypto.crycb->apcb0, 0,
2575 sizeof(kvm->arch.crypto.crycb->apcb0));
2576 memset(&kvm->arch.crypto.crycb->apcb1, 0,
2577 sizeof(kvm->arch.crypto.crycb->apcb1));
2579 VM_EVENT(kvm, 3, "%s", "CLR CRYCB:");
2580 /* recreate the shadow crycb for each vcpu */
2581 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2582 kvm_s390_vcpu_unblock_all(kvm);
2583 mutex_unlock(&kvm->lock);
2585 EXPORT_SYMBOL_GPL(kvm_arch_crypto_clear_masks);
2587 static u64 kvm_s390_get_initial_cpuid(void)
2592 cpuid.version = 0xff;
2593 return *((u64 *) &cpuid);
2596 static void kvm_s390_crypto_init(struct kvm *kvm)
2598 kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
2599 kvm_s390_set_crycb_format(kvm);
2601 if (!test_kvm_facility(kvm, 76))
2604 /* Enable AES/DEA protected key functions by default */
2605 kvm->arch.crypto.aes_kw = 1;
2606 kvm->arch.crypto.dea_kw = 1;
2607 get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
2608 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
2609 get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
2610 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
2613 static void sca_dispose(struct kvm *kvm)
2615 if (kvm->arch.use_esca)
2616 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
2618 free_page((unsigned long)(kvm->arch.sca));
2619 kvm->arch.sca = NULL;
2622 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
2624 gfp_t alloc_flags = GFP_KERNEL;
2626 char debug_name[16];
2627 static unsigned long sca_offset;
2630 #ifdef CONFIG_KVM_S390_UCONTROL
2631 if (type & ~KVM_VM_S390_UCONTROL)
2633 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
2640 rc = s390_enable_sie();
2646 if (!sclp.has_64bscao)
2647 alloc_flags |= GFP_DMA;
2648 rwlock_init(&kvm->arch.sca_lock);
2649 /* start with basic SCA */
2650 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
2653 mutex_lock(&kvm_lock);
2655 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
2657 kvm->arch.sca = (struct bsca_block *)
2658 ((char *) kvm->arch.sca + sca_offset);
2659 mutex_unlock(&kvm_lock);
2661 sprintf(debug_name, "kvm-%u", current->pid);
2663 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
2667 BUILD_BUG_ON(sizeof(struct sie_page2) != 4096);
2668 kvm->arch.sie_page2 =
2669 (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2670 if (!kvm->arch.sie_page2)
2673 kvm->arch.sie_page2->kvm = kvm;
2674 kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
2676 for (i = 0; i < kvm_s390_fac_size(); i++) {
2677 kvm->arch.model.fac_mask[i] = S390_lowcore.stfle_fac_list[i] &
2678 (kvm_s390_fac_base[i] |
2679 kvm_s390_fac_ext[i]);
2680 kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] &
2681 kvm_s390_fac_base[i];
2683 kvm->arch.model.subfuncs = kvm_s390_available_subfunc;
2685 /* we are always in czam mode - even on pre z14 machines */
2686 set_kvm_facility(kvm->arch.model.fac_mask, 138);
2687 set_kvm_facility(kvm->arch.model.fac_list, 138);
2688 /* we emulate STHYI in kvm */
2689 set_kvm_facility(kvm->arch.model.fac_mask, 74);
2690 set_kvm_facility(kvm->arch.model.fac_list, 74);
2691 if (MACHINE_HAS_TLB_GUEST) {
2692 set_kvm_facility(kvm->arch.model.fac_mask, 147);
2693 set_kvm_facility(kvm->arch.model.fac_list, 147);
2696 if (css_general_characteristics.aiv && test_facility(65))
2697 set_kvm_facility(kvm->arch.model.fac_mask, 65);
2699 kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
2700 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
2702 kvm_s390_crypto_init(kvm);
2704 mutex_init(&kvm->arch.float_int.ais_lock);
2705 spin_lock_init(&kvm->arch.float_int.lock);
2706 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2707 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
2708 init_waitqueue_head(&kvm->arch.ipte_wq);
2709 mutex_init(&kvm->arch.ipte_mutex);
2711 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
2712 VM_EVENT(kvm, 3, "vm created with type %lu", type);
2714 if (type & KVM_VM_S390_UCONTROL) {
2715 kvm->arch.gmap = NULL;
2716 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
2718 if (sclp.hamax == U64_MAX)
2719 kvm->arch.mem_limit = TASK_SIZE_MAX;
2721 kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
2723 kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
2724 if (!kvm->arch.gmap)
2726 kvm->arch.gmap->private = kvm;
2727 kvm->arch.gmap->pfault_enabled = 0;
2730 kvm->arch.use_pfmfi = sclp.has_pfmfi;
2731 kvm->arch.use_skf = sclp.has_skey;
2732 spin_lock_init(&kvm->arch.start_stop_lock);
2733 kvm_s390_vsie_init(kvm);
2735 kvm_s390_gisa_init(kvm);
2736 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
2740 free_page((unsigned long)kvm->arch.sie_page2);
2741 debug_unregister(kvm->arch.dbf);
2743 KVM_EVENT(3, "creation of vm failed: %d", rc);
2747 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
2751 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
2752 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
2753 kvm_s390_clear_local_irqs(vcpu);
2754 kvm_clear_async_pf_completion_queue(vcpu);
2755 if (!kvm_is_ucontrol(vcpu->kvm))
2758 if (kvm_is_ucontrol(vcpu->kvm))
2759 gmap_remove(vcpu->arch.gmap);
2761 if (vcpu->kvm->arch.use_cmma)
2762 kvm_s390_vcpu_unsetup_cmma(vcpu);
2763 /* We can not hold the vcpu mutex here, we are already dying */
2764 if (kvm_s390_pv_cpu_get_handle(vcpu))
2765 kvm_s390_pv_destroy_cpu(vcpu, &rc, &rrc);
2766 free_page((unsigned long)(vcpu->arch.sie_block));
2769 static void kvm_free_vcpus(struct kvm *kvm)
2772 struct kvm_vcpu *vcpu;
2774 kvm_for_each_vcpu(i, vcpu, kvm)
2775 kvm_vcpu_destroy(vcpu);
2777 mutex_lock(&kvm->lock);
2778 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
2779 kvm->vcpus[i] = NULL;
2781 atomic_set(&kvm->online_vcpus, 0);
2782 mutex_unlock(&kvm->lock);
2785 void kvm_arch_destroy_vm(struct kvm *kvm)
2789 kvm_free_vcpus(kvm);
2791 kvm_s390_gisa_destroy(kvm);
2793 * We are already at the end of life and kvm->lock is not taken.
2794 * This is ok as the file descriptor is closed by now and nobody
2795 * can mess with the pv state. To avoid lockdep_assert_held from
2796 * complaining we do not use kvm_s390_pv_is_protected.
2798 if (kvm_s390_pv_get_handle(kvm))
2799 kvm_s390_pv_deinit_vm(kvm, &rc, &rrc);
2800 debug_unregister(kvm->arch.dbf);
2801 free_page((unsigned long)kvm->arch.sie_page2);
2802 if (!kvm_is_ucontrol(kvm))
2803 gmap_remove(kvm->arch.gmap);
2804 kvm_s390_destroy_adapters(kvm);
2805 kvm_s390_clear_float_irqs(kvm);
2806 kvm_s390_vsie_destroy(kvm);
2807 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
2810 /* Section: vcpu related */
2811 static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
2813 vcpu->arch.gmap = gmap_create(current->mm, -1UL);
2814 if (!vcpu->arch.gmap)
2816 vcpu->arch.gmap->private = vcpu->kvm;
2821 static void sca_del_vcpu(struct kvm_vcpu *vcpu)
2823 if (!kvm_s390_use_sca_entries())
2825 read_lock(&vcpu->kvm->arch.sca_lock);
2826 if (vcpu->kvm->arch.use_esca) {
2827 struct esca_block *sca = vcpu->kvm->arch.sca;
2829 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2830 sca->cpu[vcpu->vcpu_id].sda = 0;
2832 struct bsca_block *sca = vcpu->kvm->arch.sca;
2834 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2835 sca->cpu[vcpu->vcpu_id].sda = 0;
2837 read_unlock(&vcpu->kvm->arch.sca_lock);
2840 static void sca_add_vcpu(struct kvm_vcpu *vcpu)
2842 if (!kvm_s390_use_sca_entries()) {
2843 struct bsca_block *sca = vcpu->kvm->arch.sca;
2845 /* we still need the basic sca for the ipte control */
2846 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2847 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
2850 read_lock(&vcpu->kvm->arch.sca_lock);
2851 if (vcpu->kvm->arch.use_esca) {
2852 struct esca_block *sca = vcpu->kvm->arch.sca;
2854 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2855 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2856 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
2857 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2858 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2860 struct bsca_block *sca = vcpu->kvm->arch.sca;
2862 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2863 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2864 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
2865 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2867 read_unlock(&vcpu->kvm->arch.sca_lock);
2870 /* Basic SCA to Extended SCA data copy routines */
2871 static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
2874 d->sigp_ctrl.c = s->sigp_ctrl.c;
2875 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
2878 static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
2882 d->ipte_control = s->ipte_control;
2884 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
2885 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
2888 static int sca_switch_to_extended(struct kvm *kvm)
2890 struct bsca_block *old_sca = kvm->arch.sca;
2891 struct esca_block *new_sca;
2892 struct kvm_vcpu *vcpu;
2893 unsigned int vcpu_idx;
2896 if (kvm->arch.use_esca)
2899 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
2903 scaoh = (u32)((u64)(new_sca) >> 32);
2904 scaol = (u32)(u64)(new_sca) & ~0x3fU;
2906 kvm_s390_vcpu_block_all(kvm);
2907 write_lock(&kvm->arch.sca_lock);
2909 sca_copy_b_to_e(new_sca, old_sca);
2911 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
2912 vcpu->arch.sie_block->scaoh = scaoh;
2913 vcpu->arch.sie_block->scaol = scaol;
2914 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2916 kvm->arch.sca = new_sca;
2917 kvm->arch.use_esca = 1;
2919 write_unlock(&kvm->arch.sca_lock);
2920 kvm_s390_vcpu_unblock_all(kvm);
2922 free_page((unsigned long)old_sca);
2924 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
2925 old_sca, kvm->arch.sca);
2929 static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
2933 if (!kvm_s390_use_sca_entries()) {
2934 if (id < KVM_MAX_VCPUS)
2938 if (id < KVM_S390_BSCA_CPU_SLOTS)
2940 if (!sclp.has_esca || !sclp.has_64bscao)
2943 mutex_lock(&kvm->lock);
2944 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
2945 mutex_unlock(&kvm->lock);
2947 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
2950 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2951 static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2953 WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
2954 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2955 vcpu->arch.cputm_start = get_tod_clock_fast();
2956 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2959 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2960 static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2962 WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
2963 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2964 vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2965 vcpu->arch.cputm_start = 0;
2966 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2969 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2970 static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2972 WARN_ON_ONCE(vcpu->arch.cputm_enabled);
2973 vcpu->arch.cputm_enabled = true;
2974 __start_cpu_timer_accounting(vcpu);
2977 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2978 static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2980 WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
2981 __stop_cpu_timer_accounting(vcpu);
2982 vcpu->arch.cputm_enabled = false;
2985 static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2987 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2988 __enable_cpu_timer_accounting(vcpu);
2992 static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2994 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2995 __disable_cpu_timer_accounting(vcpu);
2999 /* set the cpu timer - may only be called from the VCPU thread itself */
3000 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
3002 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
3003 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
3004 if (vcpu->arch.cputm_enabled)
3005 vcpu->arch.cputm_start = get_tod_clock_fast();
3006 vcpu->arch.sie_block->cputm = cputm;
3007 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
3011 /* update and get the cpu timer - can also be called from other VCPU threads */
3012 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
3017 if (unlikely(!vcpu->arch.cputm_enabled))
3018 return vcpu->arch.sie_block->cputm;
3020 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
3022 seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
3024 * If the writer would ever execute a read in the critical
3025 * section, e.g. in irq context, we have a deadlock.
3027 WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
3028 value = vcpu->arch.sie_block->cputm;
3029 /* if cputm_start is 0, accounting is being started/stopped */
3030 if (likely(vcpu->arch.cputm_start))
3031 value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
3032 } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
3037 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
3040 gmap_enable(vcpu->arch.enabled_gmap);
3041 kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING);
3042 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
3043 __start_cpu_timer_accounting(vcpu);
3047 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
3050 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
3051 __stop_cpu_timer_accounting(vcpu);
3052 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
3053 vcpu->arch.enabled_gmap = gmap_get_enabled();
3054 gmap_disable(vcpu->arch.enabled_gmap);
3058 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
3060 mutex_lock(&vcpu->kvm->lock);
3062 vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
3063 vcpu->arch.sie_block->epdx = vcpu->kvm->arch.epdx;
3065 mutex_unlock(&vcpu->kvm->lock);
3066 if (!kvm_is_ucontrol(vcpu->kvm)) {
3067 vcpu->arch.gmap = vcpu->kvm->arch.gmap;
3070 if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
3071 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
3072 /* make vcpu_load load the right gmap on the first trigger */
3073 vcpu->arch.enabled_gmap = vcpu->arch.gmap;
3076 static bool kvm_has_pckmo_subfunc(struct kvm *kvm, unsigned long nr)
3078 if (test_bit_inv(nr, (unsigned long *)&kvm->arch.model.subfuncs.pckmo) &&
3079 test_bit_inv(nr, (unsigned long *)&kvm_s390_available_subfunc.pckmo))
3084 static bool kvm_has_pckmo_ecc(struct kvm *kvm)
3086 /* At least one ECC subfunction must be present */
3087 return kvm_has_pckmo_subfunc(kvm, 32) ||
3088 kvm_has_pckmo_subfunc(kvm, 33) ||
3089 kvm_has_pckmo_subfunc(kvm, 34) ||
3090 kvm_has_pckmo_subfunc(kvm, 40) ||
3091 kvm_has_pckmo_subfunc(kvm, 41);
3095 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
3098 * If the AP instructions are not being interpreted and the MSAX3
3099 * facility is not configured for the guest, there is nothing to set up.
3101 if (!vcpu->kvm->arch.crypto.apie && !test_kvm_facility(vcpu->kvm, 76))
3104 vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
3105 vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
3106 vcpu->arch.sie_block->eca &= ~ECA_APIE;
3107 vcpu->arch.sie_block->ecd &= ~ECD_ECC;
3109 if (vcpu->kvm->arch.crypto.apie)
3110 vcpu->arch.sie_block->eca |= ECA_APIE;
3112 /* Set up protected key support */
3113 if (vcpu->kvm->arch.crypto.aes_kw) {
3114 vcpu->arch.sie_block->ecb3 |= ECB3_AES;
3115 /* ecc is also wrapped with AES key */
3116 if (kvm_has_pckmo_ecc(vcpu->kvm))
3117 vcpu->arch.sie_block->ecd |= ECD_ECC;
3120 if (vcpu->kvm->arch.crypto.dea_kw)
3121 vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
3124 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
3126 free_page(vcpu->arch.sie_block->cbrlo);
3127 vcpu->arch.sie_block->cbrlo = 0;
3130 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
3132 vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
3133 if (!vcpu->arch.sie_block->cbrlo)
3138 static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
3140 struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
3142 vcpu->arch.sie_block->ibc = model->ibc;
3143 if (test_kvm_facility(vcpu->kvm, 7))
3144 vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
3147 static int kvm_s390_vcpu_setup(struct kvm_vcpu *vcpu)
3152 atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
3156 if (test_kvm_facility(vcpu->kvm, 78))
3157 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED2);
3158 else if (test_kvm_facility(vcpu->kvm, 8))
3159 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED);
3161 kvm_s390_vcpu_setup_model(vcpu);
3163 /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
3164 if (MACHINE_HAS_ESOP)
3165 vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT;
3166 if (test_kvm_facility(vcpu->kvm, 9))
3167 vcpu->arch.sie_block->ecb |= ECB_SRSI;
3168 if (test_kvm_facility(vcpu->kvm, 73))
3169 vcpu->arch.sie_block->ecb |= ECB_TE;
3171 if (test_kvm_facility(vcpu->kvm, 8) && vcpu->kvm->arch.use_pfmfi)
3172 vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
3173 if (test_kvm_facility(vcpu->kvm, 130))
3174 vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
3175 vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI;
3177 vcpu->arch.sie_block->eca |= ECA_CEI;
3179 vcpu->arch.sie_block->eca |= ECA_IB;
3181 vcpu->arch.sie_block->eca |= ECA_SII;
3182 if (sclp.has_sigpif)
3183 vcpu->arch.sie_block->eca |= ECA_SIGPI;
3184 if (test_kvm_facility(vcpu->kvm, 129)) {
3185 vcpu->arch.sie_block->eca |= ECA_VX;
3186 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
3188 if (test_kvm_facility(vcpu->kvm, 139))
3189 vcpu->arch.sie_block->ecd |= ECD_MEF;
3190 if (test_kvm_facility(vcpu->kvm, 156))
3191 vcpu->arch.sie_block->ecd |= ECD_ETOKENF;
3192 if (vcpu->arch.sie_block->gd) {
3193 vcpu->arch.sie_block->eca |= ECA_AIV;
3194 VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u",
3195 vcpu->arch.sie_block->gd & 0x3, vcpu->vcpu_id);
3197 vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
3199 vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
3202 kvm_s390_set_cpuflags(vcpu, CPUSTAT_KSS);
3204 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
3206 if (vcpu->kvm->arch.use_cmma) {
3207 rc = kvm_s390_vcpu_setup_cmma(vcpu);
3211 hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
3212 vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
3214 vcpu->arch.sie_block->hpid = HPID_KVM;
3216 kvm_s390_vcpu_crypto_setup(vcpu);
3218 mutex_lock(&vcpu->kvm->lock);
3219 if (kvm_s390_pv_is_protected(vcpu->kvm)) {
3220 rc = kvm_s390_pv_create_cpu(vcpu, &uvrc, &uvrrc);
3222 kvm_s390_vcpu_unsetup_cmma(vcpu);
3224 mutex_unlock(&vcpu->kvm->lock);
3229 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
3231 if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
3236 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
3238 struct sie_page *sie_page;
3241 BUILD_BUG_ON(sizeof(struct sie_page) != 4096);
3242 sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
3246 vcpu->arch.sie_block = &sie_page->sie_block;
3247 vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
3249 /* the real guest size will always be smaller than msl */
3250 vcpu->arch.sie_block->mso = 0;
3251 vcpu->arch.sie_block->msl = sclp.hamax;
3253 vcpu->arch.sie_block->icpua = vcpu->vcpu_id;
3254 spin_lock_init(&vcpu->arch.local_int.lock);
3255 vcpu->arch.sie_block->gd = (u32)(u64)vcpu->kvm->arch.gisa_int.origin;
3256 if (vcpu->arch.sie_block->gd && sclp.has_gisaf)
3257 vcpu->arch.sie_block->gd |= GISA_FORMAT1;
3258 seqcount_init(&vcpu->arch.cputm_seqcount);
3260 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
3261 kvm_clear_async_pf_completion_queue(vcpu);
3262 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
3268 kvm_s390_set_prefix(vcpu, 0);
3269 if (test_kvm_facility(vcpu->kvm, 64))
3270 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
3271 if (test_kvm_facility(vcpu->kvm, 82))
3272 vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
3273 if (test_kvm_facility(vcpu->kvm, 133))
3274 vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
3275 if (test_kvm_facility(vcpu->kvm, 156))
3276 vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN;
3277 /* fprs can be synchronized via vrs, even if the guest has no vx. With
3278 * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
3281 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
3283 vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
3285 if (kvm_is_ucontrol(vcpu->kvm)) {
3286 rc = __kvm_ucontrol_vcpu_init(vcpu);
3288 goto out_free_sie_block;
3291 VM_EVENT(vcpu->kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK",
3292 vcpu->vcpu_id, vcpu, vcpu->arch.sie_block);
3293 trace_kvm_s390_create_vcpu(vcpu->vcpu_id, vcpu, vcpu->arch.sie_block);
3295 rc = kvm_s390_vcpu_setup(vcpu);
3297 goto out_ucontrol_uninit;
3300 out_ucontrol_uninit:
3301 if (kvm_is_ucontrol(vcpu->kvm))
3302 gmap_remove(vcpu->arch.gmap);
3304 free_page((unsigned long)(vcpu->arch.sie_block));
3308 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
3310 return kvm_s390_vcpu_has_irq(vcpu, 0);
3313 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
3315 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
3318 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
3320 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3324 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
3326 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3329 static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
3331 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3335 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu)
3337 return atomic_read(&vcpu->arch.sie_block->prog20) &
3338 (PROG_BLOCK_SIE | PROG_REQUEST);
3341 static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
3343 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3347 * Kick a guest cpu out of (v)SIE and wait until (v)SIE is not running.
3348 * If the CPU is not running (e.g. waiting as idle) the function will
3349 * return immediately. */
3350 void exit_sie(struct kvm_vcpu *vcpu)
3352 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
3353 kvm_s390_vsie_kick(vcpu);
3354 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
3358 /* Kick a guest cpu out of SIE to process a request synchronously */
3359 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
3361 kvm_make_request(req, vcpu);
3362 kvm_s390_vcpu_request(vcpu);
3365 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
3368 struct kvm *kvm = gmap->private;
3369 struct kvm_vcpu *vcpu;
3370 unsigned long prefix;
3373 if (gmap_is_shadow(gmap))
3375 if (start >= 1UL << 31)
3376 /* We are only interested in prefix pages */
3378 kvm_for_each_vcpu(i, vcpu, kvm) {
3379 /* match against both prefix pages */
3380 prefix = kvm_s390_get_prefix(vcpu);
3381 if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
3382 VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
3384 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
3389 bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
3391 /* do not poll with more than halt_poll_max_steal percent of steal time */
3392 if (S390_lowcore.avg_steal_timer * 100 / (TICK_USEC << 12) >=
3393 halt_poll_max_steal) {
3394 vcpu->stat.halt_no_poll_steal++;
3400 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
3402 /* kvm common code refers to this, but never calls it */
3407 static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
3408 struct kvm_one_reg *reg)
3413 case KVM_REG_S390_TODPR:
3414 r = put_user(vcpu->arch.sie_block->todpr,
3415 (u32 __user *)reg->addr);
3417 case KVM_REG_S390_EPOCHDIFF:
3418 r = put_user(vcpu->arch.sie_block->epoch,
3419 (u64 __user *)reg->addr);
3421 case KVM_REG_S390_CPU_TIMER:
3422 r = put_user(kvm_s390_get_cpu_timer(vcpu),
3423 (u64 __user *)reg->addr);
3425 case KVM_REG_S390_CLOCK_COMP:
3426 r = put_user(vcpu->arch.sie_block->ckc,
3427 (u64 __user *)reg->addr);
3429 case KVM_REG_S390_PFTOKEN:
3430 r = put_user(vcpu->arch.pfault_token,
3431 (u64 __user *)reg->addr);
3433 case KVM_REG_S390_PFCOMPARE:
3434 r = put_user(vcpu->arch.pfault_compare,
3435 (u64 __user *)reg->addr);
3437 case KVM_REG_S390_PFSELECT:
3438 r = put_user(vcpu->arch.pfault_select,
3439 (u64 __user *)reg->addr);
3441 case KVM_REG_S390_PP:
3442 r = put_user(vcpu->arch.sie_block->pp,
3443 (u64 __user *)reg->addr);
3445 case KVM_REG_S390_GBEA:
3446 r = put_user(vcpu->arch.sie_block->gbea,
3447 (u64 __user *)reg->addr);
3456 static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
3457 struct kvm_one_reg *reg)
3463 case KVM_REG_S390_TODPR:
3464 r = get_user(vcpu->arch.sie_block->todpr,
3465 (u32 __user *)reg->addr);
3467 case KVM_REG_S390_EPOCHDIFF:
3468 r = get_user(vcpu->arch.sie_block->epoch,
3469 (u64 __user *)reg->addr);
3471 case KVM_REG_S390_CPU_TIMER:
3472 r = get_user(val, (u64 __user *)reg->addr);
3474 kvm_s390_set_cpu_timer(vcpu, val);
3476 case KVM_REG_S390_CLOCK_COMP:
3477 r = get_user(vcpu->arch.sie_block->ckc,
3478 (u64 __user *)reg->addr);
3480 case KVM_REG_S390_PFTOKEN:
3481 r = get_user(vcpu->arch.pfault_token,
3482 (u64 __user *)reg->addr);
3483 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3484 kvm_clear_async_pf_completion_queue(vcpu);
3486 case KVM_REG_S390_PFCOMPARE:
3487 r = get_user(vcpu->arch.pfault_compare,
3488 (u64 __user *)reg->addr);
3490 case KVM_REG_S390_PFSELECT:
3491 r = get_user(vcpu->arch.pfault_select,
3492 (u64 __user *)reg->addr);
3494 case KVM_REG_S390_PP:
3495 r = get_user(vcpu->arch.sie_block->pp,
3496 (u64 __user *)reg->addr);
3498 case KVM_REG_S390_GBEA:
3499 r = get_user(vcpu->arch.sie_block->gbea,
3500 (u64 __user *)reg->addr);
3509 static void kvm_arch_vcpu_ioctl_normal_reset(struct kvm_vcpu *vcpu)
3511 vcpu->arch.sie_block->gpsw.mask &= ~PSW_MASK_RI;
3512 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
3513 memset(vcpu->run->s.regs.riccb, 0, sizeof(vcpu->run->s.regs.riccb));
3515 kvm_clear_async_pf_completion_queue(vcpu);
3516 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
3517 kvm_s390_vcpu_stop(vcpu);
3518 kvm_s390_clear_local_irqs(vcpu);
3521 static void kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
3523 /* Initial reset is a superset of the normal reset */
3524 kvm_arch_vcpu_ioctl_normal_reset(vcpu);
3527 * This equals initial cpu reset in pop, but we don't switch to ESA.
3528 * We do not only reset the internal data, but also ...
3530 vcpu->arch.sie_block->gpsw.mask = 0;
3531 vcpu->arch.sie_block->gpsw.addr = 0;
3532 kvm_s390_set_prefix(vcpu, 0);
3533 kvm_s390_set_cpu_timer(vcpu, 0);
3534 vcpu->arch.sie_block->ckc = 0;
3535 memset(vcpu->arch.sie_block->gcr, 0, sizeof(vcpu->arch.sie_block->gcr));
3536 vcpu->arch.sie_block->gcr[0] = CR0_INITIAL_MASK;
3537 vcpu->arch.sie_block->gcr[14] = CR14_INITIAL_MASK;
3539 /* ... the data in sync regs */
3540 memset(vcpu->run->s.regs.crs, 0, sizeof(vcpu->run->s.regs.crs));
3541 vcpu->run->s.regs.ckc = 0;
3542 vcpu->run->s.regs.crs[0] = CR0_INITIAL_MASK;
3543 vcpu->run->s.regs.crs[14] = CR14_INITIAL_MASK;
3544 vcpu->run->psw_addr = 0;
3545 vcpu->run->psw_mask = 0;
3546 vcpu->run->s.regs.todpr = 0;
3547 vcpu->run->s.regs.cputm = 0;
3548 vcpu->run->s.regs.ckc = 0;
3549 vcpu->run->s.regs.pp = 0;
3550 vcpu->run->s.regs.gbea = 1;
3551 vcpu->run->s.regs.fpc = 0;
3553 * Do not reset these registers in the protected case, as some of
3554 * them are overlayed and they are not accessible in this case
3557 if (!kvm_s390_pv_cpu_is_protected(vcpu)) {
3558 vcpu->arch.sie_block->gbea = 1;
3559 vcpu->arch.sie_block->pp = 0;
3560 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
3561 vcpu->arch.sie_block->todpr = 0;
3565 static void kvm_arch_vcpu_ioctl_clear_reset(struct kvm_vcpu *vcpu)
3567 struct kvm_sync_regs *regs = &vcpu->run->s.regs;
3569 /* Clear reset is a superset of the initial reset */
3570 kvm_arch_vcpu_ioctl_initial_reset(vcpu);
3572 memset(®s->gprs, 0, sizeof(regs->gprs));
3573 memset(®s->vrs, 0, sizeof(regs->vrs));
3574 memset(®s->acrs, 0, sizeof(regs->acrs));
3575 memset(®s->gscb, 0, sizeof(regs->gscb));
3578 regs->etoken_extension = 0;
3581 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3584 memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs));
3589 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3592 memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
3597 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
3598 struct kvm_sregs *sregs)
3602 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
3603 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
3609 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
3610 struct kvm_sregs *sregs)
3614 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
3615 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
3621 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3627 if (test_fp_ctl(fpu->fpc)) {
3631 vcpu->run->s.regs.fpc = fpu->fpc;
3633 convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
3634 (freg_t *) fpu->fprs);
3636 memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
3643 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3647 /* make sure we have the latest values */
3650 convert_vx_to_fp((freg_t *) fpu->fprs,
3651 (__vector128 *) vcpu->run->s.regs.vrs);
3653 memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
3654 fpu->fpc = vcpu->run->s.regs.fpc;
3660 static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
3664 if (!is_vcpu_stopped(vcpu))
3667 vcpu->run->psw_mask = psw.mask;
3668 vcpu->run->psw_addr = psw.addr;
3673 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
3674 struct kvm_translation *tr)
3676 return -EINVAL; /* not implemented yet */
3679 #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
3680 KVM_GUESTDBG_USE_HW_BP | \
3681 KVM_GUESTDBG_ENABLE)
3683 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
3684 struct kvm_guest_debug *dbg)
3690 vcpu->guest_debug = 0;
3691 kvm_s390_clear_bp_data(vcpu);
3693 if (dbg->control & ~VALID_GUESTDBG_FLAGS) {
3697 if (!sclp.has_gpere) {
3702 if (dbg->control & KVM_GUESTDBG_ENABLE) {
3703 vcpu->guest_debug = dbg->control;
3704 /* enforce guest PER */
3705 kvm_s390_set_cpuflags(vcpu, CPUSTAT_P);
3707 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
3708 rc = kvm_s390_import_bp_data(vcpu, dbg);
3710 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3711 vcpu->arch.guestdbg.last_bp = 0;
3715 vcpu->guest_debug = 0;
3716 kvm_s390_clear_bp_data(vcpu);
3717 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3725 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
3726 struct kvm_mp_state *mp_state)
3732 /* CHECK_STOP and LOAD are not supported yet */
3733 ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
3734 KVM_MP_STATE_OPERATING;
3740 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
3741 struct kvm_mp_state *mp_state)
3747 /* user space knows about this interface - let it control the state */
3748 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
3750 switch (mp_state->mp_state) {
3751 case KVM_MP_STATE_STOPPED:
3752 rc = kvm_s390_vcpu_stop(vcpu);
3754 case KVM_MP_STATE_OPERATING:
3755 rc = kvm_s390_vcpu_start(vcpu);
3757 case KVM_MP_STATE_LOAD:
3758 if (!kvm_s390_pv_cpu_is_protected(vcpu)) {
3762 rc = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR_LOAD);
3764 case KVM_MP_STATE_CHECK_STOP:
3765 fallthrough; /* CHECK_STOP and LOAD are not supported yet */
3774 static bool ibs_enabled(struct kvm_vcpu *vcpu)
3776 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_IBS);
3779 static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
3782 kvm_s390_vcpu_request_handled(vcpu);
3783 if (!kvm_request_pending(vcpu))
3786 * We use MMU_RELOAD just to re-arm the ipte notifier for the
3787 * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
3788 * This ensures that the ipte instruction for this request has
3789 * already finished. We might race against a second unmapper that
3790 * wants to set the blocking bit. Lets just retry the request loop.
3792 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
3794 rc = gmap_mprotect_notify(vcpu->arch.gmap,
3795 kvm_s390_get_prefix(vcpu),
3796 PAGE_SIZE * 2, PROT_WRITE);
3798 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
3804 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
3805 vcpu->arch.sie_block->ihcpu = 0xffff;
3809 if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
3810 if (!ibs_enabled(vcpu)) {
3811 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
3812 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IBS);
3817 if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
3818 if (ibs_enabled(vcpu)) {
3819 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
3820 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS);
3825 if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
3826 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
3830 if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) {
3832 * Disable CMM virtualization; we will emulate the ESSA
3833 * instruction manually, in order to provide additional
3834 * functionalities needed for live migration.
3836 vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA;
3840 if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) {
3842 * Re-enable CMM virtualization if CMMA is available and
3843 * CMM has been used.
3845 if ((vcpu->kvm->arch.use_cmma) &&
3846 (vcpu->kvm->mm->context.uses_cmm))
3847 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
3851 /* nothing to do, just clear the request */
3852 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
3853 /* we left the vsie handler, nothing to do, just clear the request */
3854 kvm_clear_request(KVM_REQ_VSIE_RESTART, vcpu);
3859 void kvm_s390_set_tod_clock(struct kvm *kvm,
3860 const struct kvm_s390_vm_tod_clock *gtod)
3862 struct kvm_vcpu *vcpu;
3863 struct kvm_s390_tod_clock_ext htod;
3866 mutex_lock(&kvm->lock);
3869 get_tod_clock_ext((char *)&htod);
3871 kvm->arch.epoch = gtod->tod - htod.tod;
3873 if (test_kvm_facility(kvm, 139)) {
3874 kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
3875 if (kvm->arch.epoch > gtod->tod)
3876 kvm->arch.epdx -= 1;
3879 kvm_s390_vcpu_block_all(kvm);
3880 kvm_for_each_vcpu(i, vcpu, kvm) {
3881 vcpu->arch.sie_block->epoch = kvm->arch.epoch;
3882 vcpu->arch.sie_block->epdx = kvm->arch.epdx;
3885 kvm_s390_vcpu_unblock_all(kvm);
3887 mutex_unlock(&kvm->lock);
3891 * kvm_arch_fault_in_page - fault-in guest page if necessary
3892 * @vcpu: The corresponding virtual cpu
3893 * @gpa: Guest physical address
3894 * @writable: Whether the page should be writable or not
3896 * Make sure that a guest page has been faulted-in on the host.
3898 * Return: Zero on success, negative error code otherwise.
3900 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
3902 return gmap_fault(vcpu->arch.gmap, gpa,
3903 writable ? FAULT_FLAG_WRITE : 0);
3906 static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
3907 unsigned long token)
3909 struct kvm_s390_interrupt inti;
3910 struct kvm_s390_irq irq;
3913 irq.u.ext.ext_params2 = token;
3914 irq.type = KVM_S390_INT_PFAULT_INIT;
3915 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
3917 inti.type = KVM_S390_INT_PFAULT_DONE;
3918 inti.parm64 = token;
3919 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
3923 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
3924 struct kvm_async_pf *work)
3926 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
3927 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
3930 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
3931 struct kvm_async_pf *work)
3933 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
3934 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
3937 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
3938 struct kvm_async_pf *work)
3940 /* s390 will always inject the page directly */
3943 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
3946 * s390 will always inject the page directly,
3947 * but we still want check_async_completion to cleanup
3952 static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
3955 struct kvm_arch_async_pf arch;
3958 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3960 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
3961 vcpu->arch.pfault_compare)
3963 if (psw_extint_disabled(vcpu))
3965 if (kvm_s390_vcpu_has_irq(vcpu, 0))
3967 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK))
3969 if (!vcpu->arch.gmap->pfault_enabled)
3972 hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
3973 hva += current->thread.gmap_addr & ~PAGE_MASK;
3974 if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
3977 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
3981 static int vcpu_pre_run(struct kvm_vcpu *vcpu)
3986 * On s390 notifications for arriving pages will be delivered directly
3987 * to the guest but the house keeping for completed pfaults is
3988 * handled outside the worker.
3990 kvm_check_async_pf_completion(vcpu);
3992 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
3993 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
3998 if (test_cpu_flag(CIF_MCCK_PENDING))
4001 if (!kvm_is_ucontrol(vcpu->kvm)) {
4002 rc = kvm_s390_deliver_pending_interrupts(vcpu);
4007 rc = kvm_s390_handle_requests(vcpu);
4011 if (guestdbg_enabled(vcpu)) {
4012 kvm_s390_backup_guest_per_regs(vcpu);
4013 kvm_s390_patch_guest_per_regs(vcpu);
4016 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask);
4018 vcpu->arch.sie_block->icptcode = 0;
4019 cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
4020 VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
4021 trace_kvm_s390_sie_enter(vcpu, cpuflags);
4026 static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
4028 struct kvm_s390_pgm_info pgm_info = {
4029 .code = PGM_ADDRESSING,
4034 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
4035 trace_kvm_s390_sie_fault(vcpu);
4038 * We want to inject an addressing exception, which is defined as a
4039 * suppressing or terminating exception. However, since we came here
4040 * by a DAT access exception, the PSW still points to the faulting
4041 * instruction since DAT exceptions are nullifying. So we've got
4042 * to look up the current opcode to get the length of the instruction
4043 * to be able to forward the PSW.
4045 rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
4046 ilen = insn_length(opcode);
4050 /* Instruction-Fetching Exceptions - we can't detect the ilen.
4051 * Forward by arbitrary ilc, injection will take care of
4052 * nullification if necessary.
4054 pgm_info = vcpu->arch.pgm;
4057 pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
4058 kvm_s390_forward_psw(vcpu, ilen);
4059 return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
4062 static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
4064 struct mcck_volatile_info *mcck_info;
4065 struct sie_page *sie_page;
4067 VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
4068 vcpu->arch.sie_block->icptcode);
4069 trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
4071 if (guestdbg_enabled(vcpu))
4072 kvm_s390_restore_guest_per_regs(vcpu);
4074 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
4075 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
4077 if (exit_reason == -EINTR) {
4078 VCPU_EVENT(vcpu, 3, "%s", "machine check");
4079 sie_page = container_of(vcpu->arch.sie_block,
4080 struct sie_page, sie_block);
4081 mcck_info = &sie_page->mcck_info;
4082 kvm_s390_reinject_machine_check(vcpu, mcck_info);
4086 if (vcpu->arch.sie_block->icptcode > 0) {
4087 int rc = kvm_handle_sie_intercept(vcpu);
4089 if (rc != -EOPNOTSUPP)
4091 vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
4092 vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
4093 vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
4094 vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
4096 } else if (exit_reason != -EFAULT) {
4097 vcpu->stat.exit_null++;
4099 } else if (kvm_is_ucontrol(vcpu->kvm)) {
4100 vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
4101 vcpu->run->s390_ucontrol.trans_exc_code =
4102 current->thread.gmap_addr;
4103 vcpu->run->s390_ucontrol.pgm_code = 0x10;
4105 } else if (current->thread.gmap_pfault) {
4106 trace_kvm_s390_major_guest_pfault(vcpu);
4107 current->thread.gmap_pfault = 0;
4108 if (kvm_arch_setup_async_pf(vcpu))
4110 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
4112 return vcpu_post_run_fault_in_sie(vcpu);
4115 #define PSW_INT_MASK (PSW_MASK_EXT | PSW_MASK_IO | PSW_MASK_MCHECK)
4116 static int __vcpu_run(struct kvm_vcpu *vcpu)
4118 int rc, exit_reason;
4119 struct sie_page *sie_page = (struct sie_page *)vcpu->arch.sie_block;
4122 * We try to hold kvm->srcu during most of vcpu_run (except when run-
4123 * ning the guest), so that memslots (and other stuff) are protected
4125 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4128 rc = vcpu_pre_run(vcpu);
4132 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4134 * As PF_VCPU will be used in fault handler, between
4135 * guest_enter and guest_exit should be no uaccess.
4137 local_irq_disable();
4138 guest_enter_irqoff();
4139 __disable_cpu_timer_accounting(vcpu);
4141 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
4142 memcpy(sie_page->pv_grregs,
4143 vcpu->run->s.regs.gprs,
4144 sizeof(sie_page->pv_grregs));
4146 exit_reason = sie64a(vcpu->arch.sie_block,
4147 vcpu->run->s.regs.gprs);
4148 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
4149 memcpy(vcpu->run->s.regs.gprs,
4150 sie_page->pv_grregs,
4151 sizeof(sie_page->pv_grregs));
4153 * We're not allowed to inject interrupts on intercepts
4154 * that leave the guest state in an "in-between" state
4155 * where the next SIE entry will do a continuation.
4156 * Fence interrupts in our "internal" PSW.
4158 if (vcpu->arch.sie_block->icptcode == ICPT_PV_INSTR ||
4159 vcpu->arch.sie_block->icptcode == ICPT_PV_PREF) {
4160 vcpu->arch.sie_block->gpsw.mask &= ~PSW_INT_MASK;
4163 local_irq_disable();
4164 __enable_cpu_timer_accounting(vcpu);
4165 guest_exit_irqoff();
4167 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4169 rc = vcpu_post_run(vcpu, exit_reason);
4170 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
4172 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4176 static void sync_regs_fmt2(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4178 struct runtime_instr_cb *riccb;
4181 riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
4182 gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
4183 vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
4184 vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
4185 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
4186 vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
4187 vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
4188 vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
4190 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
4191 vcpu->arch.pfault_token = kvm_run->s.regs.pft;
4192 vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
4193 vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
4194 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
4195 kvm_clear_async_pf_completion_queue(vcpu);
4198 * If userspace sets the riccb (e.g. after migration) to a valid state,
4199 * we should enable RI here instead of doing the lazy enablement.
4201 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
4202 test_kvm_facility(vcpu->kvm, 64) &&
4204 !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) {
4205 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
4206 vcpu->arch.sie_block->ecb3 |= ECB3_RI;
4209 * If userspace sets the gscb (e.g. after migration) to non-zero,
4210 * we should enable GS here instead of doing the lazy enablement.
4212 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
4213 test_kvm_facility(vcpu->kvm, 133) &&
4215 !vcpu->arch.gs_enabled) {
4216 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)");
4217 vcpu->arch.sie_block->ecb |= ECB_GS;
4218 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
4219 vcpu->arch.gs_enabled = 1;
4221 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) &&
4222 test_kvm_facility(vcpu->kvm, 82)) {
4223 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
4224 vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0;
4226 if (MACHINE_HAS_GS) {
4228 __ctl_set_bit(2, 4);
4229 if (current->thread.gs_cb) {
4230 vcpu->arch.host_gscb = current->thread.gs_cb;
4231 save_gs_cb(vcpu->arch.host_gscb);
4233 if (vcpu->arch.gs_enabled) {
4234 current->thread.gs_cb = (struct gs_cb *)
4235 &vcpu->run->s.regs.gscb;
4236 restore_gs_cb(current->thread.gs_cb);
4240 /* SIE will load etoken directly from SDNX and therefore kvm_run */
4243 static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4245 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
4246 kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
4247 if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
4248 memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
4249 /* some control register changes require a tlb flush */
4250 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
4252 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
4253 kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
4254 vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
4256 save_access_regs(vcpu->arch.host_acrs);
4257 restore_access_regs(vcpu->run->s.regs.acrs);
4258 /* save host (userspace) fprs/vrs */
4260 vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
4261 vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
4263 current->thread.fpu.regs = vcpu->run->s.regs.vrs;
4265 current->thread.fpu.regs = vcpu->run->s.regs.fprs;
4266 current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
4267 if (test_fp_ctl(current->thread.fpu.fpc))
4268 /* User space provided an invalid FPC, let's clear it */
4269 current->thread.fpu.fpc = 0;
4271 /* Sync fmt2 only data */
4272 if (likely(!kvm_s390_pv_cpu_is_protected(vcpu))) {
4273 sync_regs_fmt2(vcpu, kvm_run);
4276 * In several places we have to modify our internal view to
4277 * not do things that are disallowed by the ultravisor. For
4278 * example we must not inject interrupts after specific exits
4279 * (e.g. 112 prefix page not secure). We do this by turning
4280 * off the machine check, external and I/O interrupt bits
4281 * of our PSW copy. To avoid getting validity intercepts, we
4282 * do only accept the condition code from userspace.
4284 vcpu->arch.sie_block->gpsw.mask &= ~PSW_MASK_CC;
4285 vcpu->arch.sie_block->gpsw.mask |= kvm_run->psw_mask &
4289 kvm_run->kvm_dirty_regs = 0;
4292 static void store_regs_fmt2(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4294 kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
4295 kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
4296 kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
4297 kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
4298 if (MACHINE_HAS_GS) {
4299 __ctl_set_bit(2, 4);
4300 if (vcpu->arch.gs_enabled)
4301 save_gs_cb(current->thread.gs_cb);
4303 current->thread.gs_cb = vcpu->arch.host_gscb;
4304 restore_gs_cb(vcpu->arch.host_gscb);
4306 if (!vcpu->arch.host_gscb)
4307 __ctl_clear_bit(2, 4);
4308 vcpu->arch.host_gscb = NULL;
4310 /* SIE will save etoken directly into SDNX and therefore kvm_run */
4313 static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4315 kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
4316 kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
4317 kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
4318 memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
4319 kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
4320 kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
4321 kvm_run->s.regs.pft = vcpu->arch.pfault_token;
4322 kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
4323 kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
4324 save_access_regs(vcpu->run->s.regs.acrs);
4325 restore_access_regs(vcpu->arch.host_acrs);
4326 /* Save guest register state */
4328 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
4329 /* Restore will be done lazily at return */
4330 current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
4331 current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
4332 if (likely(!kvm_s390_pv_cpu_is_protected(vcpu)))
4333 store_regs_fmt2(vcpu, kvm_run);
4336 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4340 if (kvm_run->immediate_exit)
4343 if (kvm_run->kvm_valid_regs & ~KVM_SYNC_S390_VALID_FIELDS ||
4344 kvm_run->kvm_dirty_regs & ~KVM_SYNC_S390_VALID_FIELDS)
4349 if (guestdbg_exit_pending(vcpu)) {
4350 kvm_s390_prepare_debug_exit(vcpu);
4355 kvm_sigset_activate(vcpu);
4358 * no need to check the return value of vcpu_start as it can only have
4359 * an error for protvirt, but protvirt means user cpu state
4361 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
4362 kvm_s390_vcpu_start(vcpu);
4363 } else if (is_vcpu_stopped(vcpu)) {
4364 pr_err_ratelimited("can't run stopped vcpu %d\n",
4370 sync_regs(vcpu, kvm_run);
4371 enable_cpu_timer_accounting(vcpu);
4374 rc = __vcpu_run(vcpu);
4376 if (signal_pending(current) && !rc) {
4377 kvm_run->exit_reason = KVM_EXIT_INTR;
4381 if (guestdbg_exit_pending(vcpu) && !rc) {
4382 kvm_s390_prepare_debug_exit(vcpu);
4386 if (rc == -EREMOTE) {
4387 /* userspace support is needed, kvm_run has been prepared */
4391 disable_cpu_timer_accounting(vcpu);
4392 store_regs(vcpu, kvm_run);
4394 kvm_sigset_deactivate(vcpu);
4396 vcpu->stat.exit_userspace++;
4403 * store status at address
4404 * we use have two special cases:
4405 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
4406 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
4408 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
4410 unsigned char archmode = 1;
4411 freg_t fprs[NUM_FPRS];
4416 px = kvm_s390_get_prefix(vcpu);
4417 if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
4418 if (write_guest_abs(vcpu, 163, &archmode, 1))
4421 } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
4422 if (write_guest_real(vcpu, 163, &archmode, 1))
4426 gpa -= __LC_FPREGS_SAVE_AREA;
4428 /* manually convert vector registers if necessary */
4429 if (MACHINE_HAS_VX) {
4430 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
4431 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
4434 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
4435 vcpu->run->s.regs.fprs, 128);
4437 rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
4438 vcpu->run->s.regs.gprs, 128);
4439 rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
4440 &vcpu->arch.sie_block->gpsw, 16);
4441 rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
4443 rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
4444 &vcpu->run->s.regs.fpc, 4);
4445 rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
4446 &vcpu->arch.sie_block->todpr, 4);
4447 cputm = kvm_s390_get_cpu_timer(vcpu);
4448 rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
4450 clkcomp = vcpu->arch.sie_block->ckc >> 8;
4451 rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
4453 rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
4454 &vcpu->run->s.regs.acrs, 64);
4455 rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
4456 &vcpu->arch.sie_block->gcr, 128);
4457 return rc ? -EFAULT : 0;
4460 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
4463 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
4464 * switch in the run ioctl. Let's update our copies before we save
4465 * it into the save area
4468 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
4469 save_access_regs(vcpu->run->s.regs.acrs);
4471 return kvm_s390_store_status_unloaded(vcpu, addr);
4474 static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4476 kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
4477 kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
4480 static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
4483 struct kvm_vcpu *vcpu;
4485 kvm_for_each_vcpu(i, vcpu, kvm) {
4486 __disable_ibs_on_vcpu(vcpu);
4490 static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4494 kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
4495 kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
4498 int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
4500 int i, online_vcpus, r = 0, started_vcpus = 0;
4502 if (!is_vcpu_stopped(vcpu))
4505 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
4506 /* Only one cpu at a time may enter/leave the STOPPED state. */
4507 spin_lock(&vcpu->kvm->arch.start_stop_lock);
4508 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4510 /* Let's tell the UV that we want to change into the operating state */
4511 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
4512 r = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR);
4514 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4519 for (i = 0; i < online_vcpus; i++) {
4520 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
4524 if (started_vcpus == 0) {
4525 /* we're the only active VCPU -> speed it up */
4526 __enable_ibs_on_vcpu(vcpu);
4527 } else if (started_vcpus == 1) {
4529 * As we are starting a second VCPU, we have to disable
4530 * the IBS facility on all VCPUs to remove potentially
4531 * oustanding ENABLE requests.
4533 __disable_ibs_on_all_vcpus(vcpu->kvm);
4536 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED);
4538 * The real PSW might have changed due to a RESTART interpreted by the
4539 * ultravisor. We block all interrupts and let the next sie exit
4542 if (kvm_s390_pv_cpu_is_protected(vcpu))
4543 vcpu->arch.sie_block->gpsw.mask &= ~PSW_INT_MASK;
4545 * Another VCPU might have used IBS while we were offline.
4546 * Let's play safe and flush the VCPU at startup.
4548 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
4549 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4553 int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
4555 int i, online_vcpus, r = 0, started_vcpus = 0;
4556 struct kvm_vcpu *started_vcpu = NULL;
4558 if (is_vcpu_stopped(vcpu))
4561 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
4562 /* Only one cpu at a time may enter/leave the STOPPED state. */
4563 spin_lock(&vcpu->kvm->arch.start_stop_lock);
4564 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4566 /* Let's tell the UV that we want to change into the stopped state */
4567 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
4568 r = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_STP);
4570 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4575 /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
4576 kvm_s390_clear_stop_irq(vcpu);
4578 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOPPED);
4579 __disable_ibs_on_vcpu(vcpu);
4581 for (i = 0; i < online_vcpus; i++) {
4582 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
4584 started_vcpu = vcpu->kvm->vcpus[i];
4588 if (started_vcpus == 1) {
4590 * As we only have one VCPU left, we want to enable the
4591 * IBS facility for that VCPU to speed it up.
4593 __enable_ibs_on_vcpu(started_vcpu);
4596 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4600 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
4601 struct kvm_enable_cap *cap)
4609 case KVM_CAP_S390_CSS_SUPPORT:
4610 if (!vcpu->kvm->arch.css_support) {
4611 vcpu->kvm->arch.css_support = 1;
4612 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
4613 trace_kvm_s390_enable_css(vcpu->kvm);
4624 static long kvm_s390_guest_sida_op(struct kvm_vcpu *vcpu,
4625 struct kvm_s390_mem_op *mop)
4627 void __user *uaddr = (void __user *)mop->buf;
4630 if (mop->flags || !mop->size)
4632 if (mop->size + mop->sida_offset < mop->size)
4634 if (mop->size + mop->sida_offset > sida_size(vcpu->arch.sie_block))
4638 case KVM_S390_MEMOP_SIDA_READ:
4639 if (copy_to_user(uaddr, (void *)(sida_origin(vcpu->arch.sie_block) +
4640 mop->sida_offset), mop->size))
4644 case KVM_S390_MEMOP_SIDA_WRITE:
4645 if (copy_from_user((void *)(sida_origin(vcpu->arch.sie_block) +
4646 mop->sida_offset), uaddr, mop->size))
4652 static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
4653 struct kvm_s390_mem_op *mop)
4655 void __user *uaddr = (void __user *)mop->buf;
4656 void *tmpbuf = NULL;
4658 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
4659 | KVM_S390_MEMOP_F_CHECK_ONLY;
4661 if (mop->flags & ~supported_flags || mop->ar >= NUM_ACRS || !mop->size)
4664 if (mop->size > MEM_OP_MAX_SIZE)
4667 if (kvm_s390_pv_cpu_is_protected(vcpu))
4670 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
4671 tmpbuf = vmalloc(mop->size);
4677 case KVM_S390_MEMOP_LOGICAL_READ:
4678 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4679 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4680 mop->size, GACC_FETCH);
4683 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4685 if (copy_to_user(uaddr, tmpbuf, mop->size))
4689 case KVM_S390_MEMOP_LOGICAL_WRITE:
4690 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4691 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4692 mop->size, GACC_STORE);
4695 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
4699 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4703 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
4704 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
4710 static long kvm_s390_guest_memsida_op(struct kvm_vcpu *vcpu,
4711 struct kvm_s390_mem_op *mop)
4715 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4718 case KVM_S390_MEMOP_LOGICAL_READ:
4719 case KVM_S390_MEMOP_LOGICAL_WRITE:
4720 r = kvm_s390_guest_mem_op(vcpu, mop);
4722 case KVM_S390_MEMOP_SIDA_READ:
4723 case KVM_S390_MEMOP_SIDA_WRITE:
4724 /* we are locked against sida going away by the vcpu->mutex */
4725 r = kvm_s390_guest_sida_op(vcpu, mop);
4731 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
4735 long kvm_arch_vcpu_async_ioctl(struct file *filp,
4736 unsigned int ioctl, unsigned long arg)
4738 struct kvm_vcpu *vcpu = filp->private_data;
4739 void __user *argp = (void __user *)arg;
4742 case KVM_S390_IRQ: {
4743 struct kvm_s390_irq s390irq;
4745 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
4747 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4749 case KVM_S390_INTERRUPT: {
4750 struct kvm_s390_interrupt s390int;
4751 struct kvm_s390_irq s390irq = {};
4753 if (copy_from_user(&s390int, argp, sizeof(s390int)))
4755 if (s390int_to_s390irq(&s390int, &s390irq))
4757 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4760 return -ENOIOCTLCMD;
4763 long kvm_arch_vcpu_ioctl(struct file *filp,
4764 unsigned int ioctl, unsigned long arg)
4766 struct kvm_vcpu *vcpu = filp->private_data;
4767 void __user *argp = (void __user *)arg;
4775 case KVM_S390_STORE_STATUS:
4776 idx = srcu_read_lock(&vcpu->kvm->srcu);
4777 r = kvm_s390_store_status_unloaded(vcpu, arg);
4778 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4780 case KVM_S390_SET_INITIAL_PSW: {
4784 if (copy_from_user(&psw, argp, sizeof(psw)))
4786 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
4789 case KVM_S390_CLEAR_RESET:
4791 kvm_arch_vcpu_ioctl_clear_reset(vcpu);
4792 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
4793 r = uv_cmd_nodata(kvm_s390_pv_cpu_get_handle(vcpu),
4794 UVC_CMD_CPU_RESET_CLEAR, &rc, &rrc);
4795 VCPU_EVENT(vcpu, 3, "PROTVIRT RESET CLEAR VCPU: rc %x rrc %x",
4799 case KVM_S390_INITIAL_RESET:
4801 kvm_arch_vcpu_ioctl_initial_reset(vcpu);
4802 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
4803 r = uv_cmd_nodata(kvm_s390_pv_cpu_get_handle(vcpu),
4804 UVC_CMD_CPU_RESET_INITIAL,
4806 VCPU_EVENT(vcpu, 3, "PROTVIRT RESET INITIAL VCPU: rc %x rrc %x",
4810 case KVM_S390_NORMAL_RESET:
4812 kvm_arch_vcpu_ioctl_normal_reset(vcpu);
4813 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
4814 r = uv_cmd_nodata(kvm_s390_pv_cpu_get_handle(vcpu),
4815 UVC_CMD_CPU_RESET, &rc, &rrc);
4816 VCPU_EVENT(vcpu, 3, "PROTVIRT RESET NORMAL VCPU: rc %x rrc %x",
4820 case KVM_SET_ONE_REG:
4821 case KVM_GET_ONE_REG: {
4822 struct kvm_one_reg reg;
4824 if (kvm_s390_pv_cpu_is_protected(vcpu))
4827 if (copy_from_user(®, argp, sizeof(reg)))
4829 if (ioctl == KVM_SET_ONE_REG)
4830 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®);
4832 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®);
4835 #ifdef CONFIG_KVM_S390_UCONTROL
4836 case KVM_S390_UCAS_MAP: {
4837 struct kvm_s390_ucas_mapping ucasmap;
4839 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4844 if (!kvm_is_ucontrol(vcpu->kvm)) {
4849 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
4850 ucasmap.vcpu_addr, ucasmap.length);
4853 case KVM_S390_UCAS_UNMAP: {
4854 struct kvm_s390_ucas_mapping ucasmap;
4856 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4861 if (!kvm_is_ucontrol(vcpu->kvm)) {
4866 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
4871 case KVM_S390_VCPU_FAULT: {
4872 r = gmap_fault(vcpu->arch.gmap, arg, 0);
4875 case KVM_ENABLE_CAP:
4877 struct kvm_enable_cap cap;
4879 if (copy_from_user(&cap, argp, sizeof(cap)))
4881 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
4884 case KVM_S390_MEM_OP: {
4885 struct kvm_s390_mem_op mem_op;
4887 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
4888 r = kvm_s390_guest_memsida_op(vcpu, &mem_op);
4893 case KVM_S390_SET_IRQ_STATE: {
4894 struct kvm_s390_irq_state irq_state;
4897 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4899 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
4900 irq_state.len == 0 ||
4901 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
4905 /* do not use irq_state.flags, it will break old QEMUs */
4906 r = kvm_s390_set_irq_state(vcpu,
4907 (void __user *) irq_state.buf,
4911 case KVM_S390_GET_IRQ_STATE: {
4912 struct kvm_s390_irq_state irq_state;
4915 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4917 if (irq_state.len == 0) {
4921 /* do not use irq_state.flags, it will break old QEMUs */
4922 r = kvm_s390_get_irq_state(vcpu,
4923 (__u8 __user *) irq_state.buf,
4935 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
4937 #ifdef CONFIG_KVM_S390_UCONTROL
4938 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
4939 && (kvm_is_ucontrol(vcpu->kvm))) {
4940 vmf->page = virt_to_page(vcpu->arch.sie_block);
4941 get_page(vmf->page);
4945 return VM_FAULT_SIGBUS;
4948 /* Section: memory related */
4949 int kvm_arch_prepare_memory_region(struct kvm *kvm,
4950 struct kvm_memory_slot *memslot,
4951 const struct kvm_userspace_memory_region *mem,
4952 enum kvm_mr_change change)
4954 /* A few sanity checks. We can have memory slots which have to be
4955 located/ended at a segment boundary (1MB). The memory in userland is
4956 ok to be fragmented into various different vmas. It is okay to mmap()
4957 and munmap() stuff in this slot after doing this call at any time */
4959 if (mem->userspace_addr & 0xffffful)
4962 if (mem->memory_size & 0xffffful)
4965 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
4968 /* When we are protected, we should not change the memory slots */
4969 if (kvm_s390_pv_get_handle(kvm))
4974 void kvm_arch_commit_memory_region(struct kvm *kvm,
4975 const struct kvm_userspace_memory_region *mem,
4976 struct kvm_memory_slot *old,
4977 const struct kvm_memory_slot *new,
4978 enum kvm_mr_change change)
4984 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4985 old->npages * PAGE_SIZE);
4988 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4989 old->npages * PAGE_SIZE);
4994 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
4995 mem->guest_phys_addr, mem->memory_size);
4997 case KVM_MR_FLAGS_ONLY:
5000 WARN(1, "Unknown KVM MR CHANGE: %d\n", change);
5003 pr_warn("failed to commit memory region\n");
5007 static inline unsigned long nonhyp_mask(int i)
5009 unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
5011 return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
5014 void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
5016 vcpu->valid_wakeup = false;
5019 static int __init kvm_s390_init(void)
5023 if (!sclp.has_sief2) {
5024 pr_info("SIE is not available\n");
5028 if (nested && hpage) {
5029 pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n");
5033 for (i = 0; i < 16; i++)
5034 kvm_s390_fac_base[i] |=
5035 S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
5037 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
5040 static void __exit kvm_s390_exit(void)
5045 module_init(kvm_s390_init);
5046 module_exit(kvm_s390_exit);
5049 * Enable autoloading of the kvm module.
5050 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
5051 * since x86 takes a different approach.
5053 #include <linux/miscdevice.h>
5054 MODULE_ALIAS_MISCDEV(KVM_MINOR);
5055 MODULE_ALIAS("devname:kvm");