arm64: atomics: lse: Dereference matching size
[linux-2.6-microblaze.git] / arch / arm64 / include / asm / kvm_host.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2012,2013 - ARM Ltd
4  * Author: Marc Zyngier <marc.zyngier@arm.com>
5  *
6  * Derived from arch/arm/include/asm/kvm_host.h:
7  * Copyright (C) 2012 - Virtual Open Systems and Columbia University
8  * Author: Christoffer Dall <c.dall@virtualopensystems.com>
9  */
10
11 #ifndef __ARM64_KVM_HOST_H__
12 #define __ARM64_KVM_HOST_H__
13
14 #include <linux/arm-smccc.h>
15 #include <linux/bitmap.h>
16 #include <linux/types.h>
17 #include <linux/jump_label.h>
18 #include <linux/kvm_types.h>
19 #include <linux/percpu.h>
20 #include <linux/psci.h>
21 #include <asm/arch_gicv3.h>
22 #include <asm/barrier.h>
23 #include <asm/cpufeature.h>
24 #include <asm/cputype.h>
25 #include <asm/daifflags.h>
26 #include <asm/fpsimd.h>
27 #include <asm/kvm.h>
28 #include <asm/kvm_asm.h>
29 #include <asm/thread_info.h>
30
31 #define __KVM_HAVE_ARCH_INTC_INITIALIZED
32
33 #define KVM_HALT_POLL_NS_DEFAULT 500000
34
35 #include <kvm/arm_vgic.h>
36 #include <kvm/arm_arch_timer.h>
37 #include <kvm/arm_pmu.h>
38
39 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS
40
41 #define KVM_VCPU_MAX_FEATURES 7
42
43 #define KVM_REQ_SLEEP \
44         KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
45 #define KVM_REQ_IRQ_PENDING     KVM_ARCH_REQ(1)
46 #define KVM_REQ_VCPU_RESET      KVM_ARCH_REQ(2)
47 #define KVM_REQ_RECORD_STEAL    KVM_ARCH_REQ(3)
48 #define KVM_REQ_RELOAD_GICv4    KVM_ARCH_REQ(4)
49 #define KVM_REQ_RELOAD_PMU      KVM_ARCH_REQ(5)
50
51 #define KVM_DIRTY_LOG_MANUAL_CAPS   (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \
52                                      KVM_DIRTY_LOG_INITIALLY_SET)
53
54 /*
55  * Mode of operation configurable with kvm-arm.mode early param.
56  * See Documentation/admin-guide/kernel-parameters.txt for more information.
57  */
58 enum kvm_mode {
59         KVM_MODE_DEFAULT,
60         KVM_MODE_PROTECTED,
61         KVM_MODE_NONE,
62 };
63 enum kvm_mode kvm_get_mode(void);
64
65 DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
66
67 extern unsigned int kvm_sve_max_vl;
68 int kvm_arm_init_sve(void);
69
70 u32 __attribute_const__ kvm_target_cpu(void);
71 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
72 void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu);
73
74 struct kvm_vmid {
75         /* The VMID generation used for the virt. memory system */
76         u64    vmid_gen;
77         u32    vmid;
78 };
79
80 struct kvm_s2_mmu {
81         struct kvm_vmid vmid;
82
83         /*
84          * stage2 entry level table
85          *
86          * Two kvm_s2_mmu structures in the same VM can point to the same
87          * pgd here.  This happens when running a guest using a
88          * translation regime that isn't affected by its own stage-2
89          * translation, such as a non-VHE hypervisor running at vEL2, or
90          * for vEL1/EL0 with vHCR_EL2.VM == 0.  In that case, we use the
91          * canonical stage-2 page tables.
92          */
93         phys_addr_t     pgd_phys;
94         struct kvm_pgtable *pgt;
95
96         /* The last vcpu id that ran on each physical CPU */
97         int __percpu *last_vcpu_ran;
98
99         struct kvm_arch *arch;
100 };
101
102 struct kvm_arch_memory_slot {
103 };
104
105 struct kvm_arch {
106         struct kvm_s2_mmu mmu;
107
108         /* VTCR_EL2 value for this VM */
109         u64    vtcr;
110
111         /* The maximum number of vCPUs depends on the used GIC model */
112         int max_vcpus;
113
114         /* Interrupt controller */
115         struct vgic_dist        vgic;
116
117         /* Mandated version of PSCI */
118         u32 psci_version;
119
120         /*
121          * If we encounter a data abort without valid instruction syndrome
122          * information, report this to user space.  User space can (and
123          * should) opt in to this feature if KVM_CAP_ARM_NISV_TO_USER is
124          * supported.
125          */
126         bool return_nisv_io_abort_to_user;
127
128         /*
129          * VM-wide PMU filter, implemented as a bitmap and big enough for
130          * up to 2^10 events (ARMv8.0) or 2^16 events (ARMv8.1+).
131          */
132         unsigned long *pmu_filter;
133         unsigned int pmuver;
134
135         u8 pfr0_csv2;
136         u8 pfr0_csv3;
137
138         /* Memory Tagging Extension enabled for the guest */
139         bool mte_enabled;
140 };
141
142 struct kvm_vcpu_fault_info {
143         u32 esr_el2;            /* Hyp Syndrom Register */
144         u64 far_el2;            /* Hyp Fault Address Register */
145         u64 hpfar_el2;          /* Hyp IPA Fault Address Register */
146         u64 disr_el1;           /* Deferred [SError] Status Register */
147 };
148
149 enum vcpu_sysreg {
150         __INVALID_SYSREG__,   /* 0 is reserved as an invalid value */
151         MPIDR_EL1,      /* MultiProcessor Affinity Register */
152         CSSELR_EL1,     /* Cache Size Selection Register */
153         SCTLR_EL1,      /* System Control Register */
154         ACTLR_EL1,      /* Auxiliary Control Register */
155         CPACR_EL1,      /* Coprocessor Access Control */
156         ZCR_EL1,        /* SVE Control */
157         TTBR0_EL1,      /* Translation Table Base Register 0 */
158         TTBR1_EL1,      /* Translation Table Base Register 1 */
159         TCR_EL1,        /* Translation Control Register */
160         ESR_EL1,        /* Exception Syndrome Register */
161         AFSR0_EL1,      /* Auxiliary Fault Status Register 0 */
162         AFSR1_EL1,      /* Auxiliary Fault Status Register 1 */
163         FAR_EL1,        /* Fault Address Register */
164         MAIR_EL1,       /* Memory Attribute Indirection Register */
165         VBAR_EL1,       /* Vector Base Address Register */
166         CONTEXTIDR_EL1, /* Context ID Register */
167         TPIDR_EL0,      /* Thread ID, User R/W */
168         TPIDRRO_EL0,    /* Thread ID, User R/O */
169         TPIDR_EL1,      /* Thread ID, Privileged */
170         AMAIR_EL1,      /* Aux Memory Attribute Indirection Register */
171         CNTKCTL_EL1,    /* Timer Control Register (EL1) */
172         PAR_EL1,        /* Physical Address Register */
173         MDSCR_EL1,      /* Monitor Debug System Control Register */
174         MDCCINT_EL1,    /* Monitor Debug Comms Channel Interrupt Enable Reg */
175         DISR_EL1,       /* Deferred Interrupt Status Register */
176
177         /* Performance Monitors Registers */
178         PMCR_EL0,       /* Control Register */
179         PMSELR_EL0,     /* Event Counter Selection Register */
180         PMEVCNTR0_EL0,  /* Event Counter Register (0-30) */
181         PMEVCNTR30_EL0 = PMEVCNTR0_EL0 + 30,
182         PMCCNTR_EL0,    /* Cycle Counter Register */
183         PMEVTYPER0_EL0, /* Event Type Register (0-30) */
184         PMEVTYPER30_EL0 = PMEVTYPER0_EL0 + 30,
185         PMCCFILTR_EL0,  /* Cycle Count Filter Register */
186         PMCNTENSET_EL0, /* Count Enable Set Register */
187         PMINTENSET_EL1, /* Interrupt Enable Set Register */
188         PMOVSSET_EL0,   /* Overflow Flag Status Set Register */
189         PMUSERENR_EL0,  /* User Enable Register */
190
191         /* Pointer Authentication Registers in a strict increasing order. */
192         APIAKEYLO_EL1,
193         APIAKEYHI_EL1,
194         APIBKEYLO_EL1,
195         APIBKEYHI_EL1,
196         APDAKEYLO_EL1,
197         APDAKEYHI_EL1,
198         APDBKEYLO_EL1,
199         APDBKEYHI_EL1,
200         APGAKEYLO_EL1,
201         APGAKEYHI_EL1,
202
203         ELR_EL1,
204         SP_EL1,
205         SPSR_EL1,
206
207         CNTVOFF_EL2,
208         CNTV_CVAL_EL0,
209         CNTV_CTL_EL0,
210         CNTP_CVAL_EL0,
211         CNTP_CTL_EL0,
212
213         /* Memory Tagging Extension registers */
214         RGSR_EL1,       /* Random Allocation Tag Seed Register */
215         GCR_EL1,        /* Tag Control Register */
216         TFSR_EL1,       /* Tag Fault Status Register (EL1) */
217         TFSRE0_EL1,     /* Tag Fault Status Register (EL0) */
218
219         /* 32bit specific registers. Keep them at the end of the range */
220         DACR32_EL2,     /* Domain Access Control Register */
221         IFSR32_EL2,     /* Instruction Fault Status Register */
222         FPEXC32_EL2,    /* Floating-Point Exception Control Register */
223         DBGVCR32_EL2,   /* Debug Vector Catch Register */
224
225         NR_SYS_REGS     /* Nothing after this line! */
226 };
227
228 struct kvm_cpu_context {
229         struct user_pt_regs regs;       /* sp = sp_el0 */
230
231         u64     spsr_abt;
232         u64     spsr_und;
233         u64     spsr_irq;
234         u64     spsr_fiq;
235
236         struct user_fpsimd_state fp_regs;
237
238         u64 sys_regs[NR_SYS_REGS];
239
240         struct kvm_vcpu *__hyp_running_vcpu;
241 };
242
243 struct kvm_pmu_events {
244         u32 events_host;
245         u32 events_guest;
246 };
247
248 struct kvm_host_data {
249         struct kvm_cpu_context host_ctxt;
250         struct kvm_pmu_events pmu_events;
251 };
252
253 struct kvm_host_psci_config {
254         /* PSCI version used by host. */
255         u32 version;
256
257         /* Function IDs used by host if version is v0.1. */
258         struct psci_0_1_function_ids function_ids_0_1;
259
260         bool psci_0_1_cpu_suspend_implemented;
261         bool psci_0_1_cpu_on_implemented;
262         bool psci_0_1_cpu_off_implemented;
263         bool psci_0_1_migrate_implemented;
264 };
265
266 extern struct kvm_host_psci_config kvm_nvhe_sym(kvm_host_psci_config);
267 #define kvm_host_psci_config CHOOSE_NVHE_SYM(kvm_host_psci_config)
268
269 extern s64 kvm_nvhe_sym(hyp_physvirt_offset);
270 #define hyp_physvirt_offset CHOOSE_NVHE_SYM(hyp_physvirt_offset)
271
272 extern u64 kvm_nvhe_sym(hyp_cpu_logical_map)[NR_CPUS];
273 #define hyp_cpu_logical_map CHOOSE_NVHE_SYM(hyp_cpu_logical_map)
274
275 struct vcpu_reset_state {
276         unsigned long   pc;
277         unsigned long   r0;
278         bool            be;
279         bool            reset;
280 };
281
282 struct kvm_vcpu_arch {
283         struct kvm_cpu_context ctxt;
284         void *sve_state;
285         unsigned int sve_max_vl;
286
287         /* Stage 2 paging state used by the hardware on next switch */
288         struct kvm_s2_mmu *hw_mmu;
289
290         /* Values of trap registers for the guest. */
291         u64 hcr_el2;
292         u64 mdcr_el2;
293         u64 cptr_el2;
294
295         /* Values of trap registers for the host before guest entry. */
296         u64 mdcr_el2_host;
297
298         /* Exception Information */
299         struct kvm_vcpu_fault_info fault;
300
301         /* State of various workarounds, see kvm_asm.h for bit assignment */
302         u64 workaround_flags;
303
304         /* Miscellaneous vcpu state flags */
305         u64 flags;
306
307         /*
308          * We maintain more than a single set of debug registers to support
309          * debugging the guest from the host and to maintain separate host and
310          * guest state during world switches. vcpu_debug_state are the debug
311          * registers of the vcpu as the guest sees them.  host_debug_state are
312          * the host registers which are saved and restored during
313          * world switches. external_debug_state contains the debug
314          * values we want to debug the guest. This is set via the
315          * KVM_SET_GUEST_DEBUG ioctl.
316          *
317          * debug_ptr points to the set of debug registers that should be loaded
318          * onto the hardware when running the guest.
319          */
320         struct kvm_guest_debug_arch *debug_ptr;
321         struct kvm_guest_debug_arch vcpu_debug_state;
322         struct kvm_guest_debug_arch external_debug_state;
323
324         struct thread_info *host_thread_info;   /* hyp VA */
325         struct user_fpsimd_state *host_fpsimd_state;    /* hyp VA */
326
327         struct {
328                 /* {Break,watch}point registers */
329                 struct kvm_guest_debug_arch regs;
330                 /* Statistical profiling extension */
331                 u64 pmscr_el1;
332                 /* Self-hosted trace */
333                 u64 trfcr_el1;
334         } host_debug_state;
335
336         /* VGIC state */
337         struct vgic_cpu vgic_cpu;
338         struct arch_timer_cpu timer_cpu;
339         struct kvm_pmu pmu;
340
341         /*
342          * Anything that is not used directly from assembly code goes
343          * here.
344          */
345
346         /*
347          * Guest registers we preserve during guest debugging.
348          *
349          * These shadow registers are updated by the kvm_handle_sys_reg
350          * trap handler if the guest accesses or updates them while we
351          * are using guest debug.
352          */
353         struct {
354                 u32     mdscr_el1;
355         } guest_debug_preserved;
356
357         /* vcpu power-off state */
358         bool power_off;
359
360         /* Don't run the guest (internal implementation need) */
361         bool pause;
362
363         /* Cache some mmu pages needed inside spinlock regions */
364         struct kvm_mmu_memory_cache mmu_page_cache;
365
366         /* Target CPU and feature flags */
367         int target;
368         DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
369
370         /* Detect first run of a vcpu */
371         bool has_run_once;
372
373         /* Virtual SError ESR to restore when HCR_EL2.VSE is set */
374         u64 vsesr_el2;
375
376         /* Additional reset state */
377         struct vcpu_reset_state reset_state;
378
379         /* True when deferrable sysregs are loaded on the physical CPU,
380          * see kvm_vcpu_load_sysregs_vhe and kvm_vcpu_put_sysregs_vhe. */
381         bool sysregs_loaded_on_cpu;
382
383         /* Guest PV state */
384         struct {
385                 u64 last_steal;
386                 gpa_t base;
387         } steal;
388 };
389
390 /* Pointer to the vcpu's SVE FFR for sve_{save,load}_state() */
391 #define vcpu_sve_pffr(vcpu) (kern_hyp_va((vcpu)->arch.sve_state) +      \
392                              sve_ffr_offset((vcpu)->arch.sve_max_vl))
393
394 #define vcpu_sve_max_vq(vcpu)   sve_vq_from_vl((vcpu)->arch.sve_max_vl)
395
396 #define vcpu_sve_state_size(vcpu) ({                                    \
397         size_t __size_ret;                                              \
398         unsigned int __vcpu_vq;                                         \
399                                                                         \
400         if (WARN_ON(!sve_vl_valid((vcpu)->arch.sve_max_vl))) {          \
401                 __size_ret = 0;                                         \
402         } else {                                                        \
403                 __vcpu_vq = vcpu_sve_max_vq(vcpu);                      \
404                 __size_ret = SVE_SIG_REGS_SIZE(__vcpu_vq);              \
405         }                                                               \
406                                                                         \
407         __size_ret;                                                     \
408 })
409
410 /* vcpu_arch flags field values: */
411 #define KVM_ARM64_DEBUG_DIRTY           (1 << 0)
412 #define KVM_ARM64_FP_ENABLED            (1 << 1) /* guest FP regs loaded */
413 #define KVM_ARM64_FP_HOST               (1 << 2) /* host FP regs loaded */
414 #define KVM_ARM64_HOST_SVE_IN_USE       (1 << 3) /* backup for host TIF_SVE */
415 #define KVM_ARM64_HOST_SVE_ENABLED      (1 << 4) /* SVE enabled for EL0 */
416 #define KVM_ARM64_GUEST_HAS_SVE         (1 << 5) /* SVE exposed to guest */
417 #define KVM_ARM64_VCPU_SVE_FINALIZED    (1 << 6) /* SVE config completed */
418 #define KVM_ARM64_GUEST_HAS_PTRAUTH     (1 << 7) /* PTRAUTH exposed to guest */
419 #define KVM_ARM64_PENDING_EXCEPTION     (1 << 8) /* Exception pending */
420 #define KVM_ARM64_EXCEPT_MASK           (7 << 9) /* Target EL/MODE */
421 #define KVM_ARM64_DEBUG_STATE_SAVE_SPE  (1 << 12) /* Save SPE context if active  */
422 #define KVM_ARM64_DEBUG_STATE_SAVE_TRBE (1 << 13) /* Save TRBE context if active  */
423
424 #define KVM_GUESTDBG_VALID_MASK (KVM_GUESTDBG_ENABLE | \
425                                  KVM_GUESTDBG_USE_SW_BP | \
426                                  KVM_GUESTDBG_USE_HW | \
427                                  KVM_GUESTDBG_SINGLESTEP)
428 /*
429  * When KVM_ARM64_PENDING_EXCEPTION is set, KVM_ARM64_EXCEPT_MASK can
430  * take the following values:
431  *
432  * For AArch32 EL1:
433  */
434 #define KVM_ARM64_EXCEPT_AA32_UND       (0 << 9)
435 #define KVM_ARM64_EXCEPT_AA32_IABT      (1 << 9)
436 #define KVM_ARM64_EXCEPT_AA32_DABT      (2 << 9)
437 /* For AArch64: */
438 #define KVM_ARM64_EXCEPT_AA64_ELx_SYNC  (0 << 9)
439 #define KVM_ARM64_EXCEPT_AA64_ELx_IRQ   (1 << 9)
440 #define KVM_ARM64_EXCEPT_AA64_ELx_FIQ   (2 << 9)
441 #define KVM_ARM64_EXCEPT_AA64_ELx_SERR  (3 << 9)
442 #define KVM_ARM64_EXCEPT_AA64_EL1       (0 << 11)
443 #define KVM_ARM64_EXCEPT_AA64_EL2       (1 << 11)
444
445 /*
446  * Overlaps with KVM_ARM64_EXCEPT_MASK on purpose so that it can't be
447  * set together with an exception...
448  */
449 #define KVM_ARM64_INCREMENT_PC          (1 << 9) /* Increment PC */
450
451 #define vcpu_has_sve(vcpu) (system_supports_sve() &&                    \
452                             ((vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_SVE))
453
454 #ifdef CONFIG_ARM64_PTR_AUTH
455 #define vcpu_has_ptrauth(vcpu)                                          \
456         ((cpus_have_final_cap(ARM64_HAS_ADDRESS_AUTH) ||                \
457           cpus_have_final_cap(ARM64_HAS_GENERIC_AUTH)) &&               \
458          (vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_PTRAUTH)
459 #else
460 #define vcpu_has_ptrauth(vcpu)          false
461 #endif
462
463 #define vcpu_gp_regs(v)         (&(v)->arch.ctxt.regs)
464
465 /*
466  * Only use __vcpu_sys_reg/ctxt_sys_reg if you know you want the
467  * memory backed version of a register, and not the one most recently
468  * accessed by a running VCPU.  For example, for userspace access or
469  * for system registers that are never context switched, but only
470  * emulated.
471  */
472 #define __ctxt_sys_reg(c,r)     (&(c)->sys_regs[(r)])
473
474 #define ctxt_sys_reg(c,r)       (*__ctxt_sys_reg(c,r))
475
476 #define __vcpu_sys_reg(v,r)     (ctxt_sys_reg(&(v)->arch.ctxt, (r)))
477
478 u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg);
479 void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg);
480
481 static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val)
482 {
483         /*
484          * *** VHE ONLY ***
485          *
486          * System registers listed in the switch are not saved on every
487          * exit from the guest but are only saved on vcpu_put.
488          *
489          * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but
490          * should never be listed below, because the guest cannot modify its
491          * own MPIDR_EL1 and MPIDR_EL1 is accessed for VCPU A from VCPU B's
492          * thread when emulating cross-VCPU communication.
493          */
494         if (!has_vhe())
495                 return false;
496
497         switch (reg) {
498         case CSSELR_EL1:        *val = read_sysreg_s(SYS_CSSELR_EL1);   break;
499         case SCTLR_EL1:         *val = read_sysreg_s(SYS_SCTLR_EL12);   break;
500         case CPACR_EL1:         *val = read_sysreg_s(SYS_CPACR_EL12);   break;
501         case TTBR0_EL1:         *val = read_sysreg_s(SYS_TTBR0_EL12);   break;
502         case TTBR1_EL1:         *val = read_sysreg_s(SYS_TTBR1_EL12);   break;
503         case TCR_EL1:           *val = read_sysreg_s(SYS_TCR_EL12);     break;
504         case ESR_EL1:           *val = read_sysreg_s(SYS_ESR_EL12);     break;
505         case AFSR0_EL1:         *val = read_sysreg_s(SYS_AFSR0_EL12);   break;
506         case AFSR1_EL1:         *val = read_sysreg_s(SYS_AFSR1_EL12);   break;
507         case FAR_EL1:           *val = read_sysreg_s(SYS_FAR_EL12);     break;
508         case MAIR_EL1:          *val = read_sysreg_s(SYS_MAIR_EL12);    break;
509         case VBAR_EL1:          *val = read_sysreg_s(SYS_VBAR_EL12);    break;
510         case CONTEXTIDR_EL1:    *val = read_sysreg_s(SYS_CONTEXTIDR_EL12);break;
511         case TPIDR_EL0:         *val = read_sysreg_s(SYS_TPIDR_EL0);    break;
512         case TPIDRRO_EL0:       *val = read_sysreg_s(SYS_TPIDRRO_EL0);  break;
513         case TPIDR_EL1:         *val = read_sysreg_s(SYS_TPIDR_EL1);    break;
514         case AMAIR_EL1:         *val = read_sysreg_s(SYS_AMAIR_EL12);   break;
515         case CNTKCTL_EL1:       *val = read_sysreg_s(SYS_CNTKCTL_EL12); break;
516         case ELR_EL1:           *val = read_sysreg_s(SYS_ELR_EL12);     break;
517         case PAR_EL1:           *val = read_sysreg_par();               break;
518         case DACR32_EL2:        *val = read_sysreg_s(SYS_DACR32_EL2);   break;
519         case IFSR32_EL2:        *val = read_sysreg_s(SYS_IFSR32_EL2);   break;
520         case DBGVCR32_EL2:      *val = read_sysreg_s(SYS_DBGVCR32_EL2); break;
521         default:                return false;
522         }
523
524         return true;
525 }
526
527 static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
528 {
529         /*
530          * *** VHE ONLY ***
531          *
532          * System registers listed in the switch are not restored on every
533          * entry to the guest but are only restored on vcpu_load.
534          *
535          * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but
536          * should never be listed below, because the MPIDR should only be set
537          * once, before running the VCPU, and never changed later.
538          */
539         if (!has_vhe())
540                 return false;
541
542         switch (reg) {
543         case CSSELR_EL1:        write_sysreg_s(val, SYS_CSSELR_EL1);    break;
544         case SCTLR_EL1:         write_sysreg_s(val, SYS_SCTLR_EL12);    break;
545         case CPACR_EL1:         write_sysreg_s(val, SYS_CPACR_EL12);    break;
546         case TTBR0_EL1:         write_sysreg_s(val, SYS_TTBR0_EL12);    break;
547         case TTBR1_EL1:         write_sysreg_s(val, SYS_TTBR1_EL12);    break;
548         case TCR_EL1:           write_sysreg_s(val, SYS_TCR_EL12);      break;
549         case ESR_EL1:           write_sysreg_s(val, SYS_ESR_EL12);      break;
550         case AFSR0_EL1:         write_sysreg_s(val, SYS_AFSR0_EL12);    break;
551         case AFSR1_EL1:         write_sysreg_s(val, SYS_AFSR1_EL12);    break;
552         case FAR_EL1:           write_sysreg_s(val, SYS_FAR_EL12);      break;
553         case MAIR_EL1:          write_sysreg_s(val, SYS_MAIR_EL12);     break;
554         case VBAR_EL1:          write_sysreg_s(val, SYS_VBAR_EL12);     break;
555         case CONTEXTIDR_EL1:    write_sysreg_s(val, SYS_CONTEXTIDR_EL12);break;
556         case TPIDR_EL0:         write_sysreg_s(val, SYS_TPIDR_EL0);     break;
557         case TPIDRRO_EL0:       write_sysreg_s(val, SYS_TPIDRRO_EL0);   break;
558         case TPIDR_EL1:         write_sysreg_s(val, SYS_TPIDR_EL1);     break;
559         case AMAIR_EL1:         write_sysreg_s(val, SYS_AMAIR_EL12);    break;
560         case CNTKCTL_EL1:       write_sysreg_s(val, SYS_CNTKCTL_EL12);  break;
561         case ELR_EL1:           write_sysreg_s(val, SYS_ELR_EL12);      break;
562         case PAR_EL1:           write_sysreg_s(val, SYS_PAR_EL1);       break;
563         case DACR32_EL2:        write_sysreg_s(val, SYS_DACR32_EL2);    break;
564         case IFSR32_EL2:        write_sysreg_s(val, SYS_IFSR32_EL2);    break;
565         case DBGVCR32_EL2:      write_sysreg_s(val, SYS_DBGVCR32_EL2);  break;
566         default:                return false;
567         }
568
569         return true;
570 }
571
572 struct kvm_vm_stat {
573         struct kvm_vm_stat_generic generic;
574 };
575
576 struct kvm_vcpu_stat {
577         struct kvm_vcpu_stat_generic generic;
578         u64 hvc_exit_stat;
579         u64 wfe_exit_stat;
580         u64 wfi_exit_stat;
581         u64 mmio_exit_user;
582         u64 mmio_exit_kernel;
583         u64 signal_exits;
584         u64 exits;
585 };
586
587 void kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
588 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
589 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
590 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
591 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
592
593 unsigned long kvm_arm_num_sys_reg_descs(struct kvm_vcpu *vcpu);
594 int kvm_arm_copy_sys_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
595 int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
596 int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
597
598 int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
599                               struct kvm_vcpu_events *events);
600
601 int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
602                               struct kvm_vcpu_events *events);
603
604 #define KVM_ARCH_WANT_MMU_NOTIFIER
605
606 void kvm_arm_halt_guest(struct kvm *kvm);
607 void kvm_arm_resume_guest(struct kvm *kvm);
608
609 #ifndef __KVM_NVHE_HYPERVISOR__
610 #define kvm_call_hyp_nvhe(f, ...)                                               \
611         ({                                                              \
612                 struct arm_smccc_res res;                               \
613                                                                         \
614                 arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(f),               \
615                                   ##__VA_ARGS__, &res);                 \
616                 WARN_ON(res.a0 != SMCCC_RET_SUCCESS);                   \
617                                                                         \
618                 res.a1;                                                 \
619         })
620
621 /*
622  * The couple of isb() below are there to guarantee the same behaviour
623  * on VHE as on !VHE, where the eret to EL1 acts as a context
624  * synchronization event.
625  */
626 #define kvm_call_hyp(f, ...)                                            \
627         do {                                                            \
628                 if (has_vhe()) {                                        \
629                         f(__VA_ARGS__);                                 \
630                         isb();                                          \
631                 } else {                                                \
632                         kvm_call_hyp_nvhe(f, ##__VA_ARGS__);            \
633                 }                                                       \
634         } while(0)
635
636 #define kvm_call_hyp_ret(f, ...)                                        \
637         ({                                                              \
638                 typeof(f(__VA_ARGS__)) ret;                             \
639                                                                         \
640                 if (has_vhe()) {                                        \
641                         ret = f(__VA_ARGS__);                           \
642                         isb();                                          \
643                 } else {                                                \
644                         ret = kvm_call_hyp_nvhe(f, ##__VA_ARGS__);      \
645                 }                                                       \
646                                                                         \
647                 ret;                                                    \
648         })
649 #else /* __KVM_NVHE_HYPERVISOR__ */
650 #define kvm_call_hyp(f, ...) f(__VA_ARGS__)
651 #define kvm_call_hyp_ret(f, ...) f(__VA_ARGS__)
652 #define kvm_call_hyp_nvhe(f, ...) f(__VA_ARGS__)
653 #endif /* __KVM_NVHE_HYPERVISOR__ */
654
655 void force_vm_exit(const cpumask_t *mask);
656
657 int handle_exit(struct kvm_vcpu *vcpu, int exception_index);
658 void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index);
659
660 int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu);
661 int kvm_handle_cp14_32(struct kvm_vcpu *vcpu);
662 int kvm_handle_cp14_64(struct kvm_vcpu *vcpu);
663 int kvm_handle_cp15_32(struct kvm_vcpu *vcpu);
664 int kvm_handle_cp15_64(struct kvm_vcpu *vcpu);
665 int kvm_handle_sys_reg(struct kvm_vcpu *vcpu);
666
667 void kvm_reset_sys_regs(struct kvm_vcpu *vcpu);
668
669 void kvm_sys_reg_table_init(void);
670
671 /* MMIO helpers */
672 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data);
673 unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len);
674
675 int kvm_handle_mmio_return(struct kvm_vcpu *vcpu);
676 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa);
677
678 int kvm_perf_init(void);
679 int kvm_perf_teardown(void);
680
681 long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu);
682 gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu);
683 void kvm_update_stolen_time(struct kvm_vcpu *vcpu);
684
685 bool kvm_arm_pvtime_supported(void);
686 int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
687                             struct kvm_device_attr *attr);
688 int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu,
689                             struct kvm_device_attr *attr);
690 int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu,
691                             struct kvm_device_attr *attr);
692
693 static inline void kvm_arm_pvtime_vcpu_init(struct kvm_vcpu_arch *vcpu_arch)
694 {
695         vcpu_arch->steal.base = GPA_INVALID;
696 }
697
698 static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch)
699 {
700         return (vcpu_arch->steal.base != GPA_INVALID);
701 }
702
703 void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome);
704
705 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
706
707 DECLARE_KVM_HYP_PER_CPU(struct kvm_host_data, kvm_host_data);
708
709 static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt)
710 {
711         /* The host's MPIDR is immutable, so let's set it up at boot time */
712         ctxt_sys_reg(cpu_ctxt, MPIDR_EL1) = read_cpuid_mpidr();
713 }
714
715 void kvm_arm_vcpu_ptrauth_trap(struct kvm_vcpu *vcpu);
716
717 static inline void kvm_arch_hardware_unsetup(void) {}
718 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
719 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
720 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
721
722 void kvm_arm_init_debug(void);
723 void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu);
724 void kvm_arm_setup_debug(struct kvm_vcpu *vcpu);
725 void kvm_arm_clear_debug(struct kvm_vcpu *vcpu);
726 void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu);
727 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
728                                struct kvm_device_attr *attr);
729 int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
730                                struct kvm_device_attr *attr);
731 int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
732                                struct kvm_device_attr *attr);
733
734 long kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm,
735                                 struct kvm_arm_copy_mte_tags *copy_tags);
736
737 /* Guest/host FPSIMD coordination helpers */
738 int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu);
739 void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu);
740 void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu);
741 void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu);
742
743 static inline bool kvm_pmu_counter_deferred(struct perf_event_attr *attr)
744 {
745         return (!has_vhe() && attr->exclude_host);
746 }
747
748 /* Flags for host debug state */
749 void kvm_arch_vcpu_load_debug_state_flags(struct kvm_vcpu *vcpu);
750 void kvm_arch_vcpu_put_debug_state_flags(struct kvm_vcpu *vcpu);
751
752 #ifdef CONFIG_KVM /* Avoid conflicts with core headers if CONFIG_KVM=n */
753 static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
754 {
755         return kvm_arch_vcpu_run_map_fp(vcpu);
756 }
757
758 void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr);
759 void kvm_clr_pmu_events(u32 clr);
760
761 void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu);
762 void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu);
763 #else
764 static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {}
765 static inline void kvm_clr_pmu_events(u32 clr) {}
766 #endif
767
768 void kvm_vcpu_load_sysregs_vhe(struct kvm_vcpu *vcpu);
769 void kvm_vcpu_put_sysregs_vhe(struct kvm_vcpu *vcpu);
770
771 int kvm_set_ipa_limit(void);
772
773 #define __KVM_HAVE_ARCH_VM_ALLOC
774 struct kvm *kvm_arch_alloc_vm(void);
775
776 int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type);
777
778 static inline bool kvm_vm_is_protected(struct kvm *kvm)
779 {
780         return false;
781 }
782
783 void kvm_init_protected_traps(struct kvm_vcpu *vcpu);
784
785 int kvm_arm_vcpu_finalize(struct kvm_vcpu *vcpu, int feature);
786 bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu);
787
788 #define kvm_arm_vcpu_sve_finalized(vcpu) \
789         ((vcpu)->arch.flags & KVM_ARM64_VCPU_SVE_FINALIZED)
790
791 #define kvm_has_mte(kvm) (system_supports_mte() && (kvm)->arch.mte_enabled)
792 #define kvm_vcpu_has_pmu(vcpu)                                  \
793         (test_bit(KVM_ARM_VCPU_PMU_V3, (vcpu)->arch.features))
794
795 int kvm_trng_call(struct kvm_vcpu *vcpu);
796 #ifdef CONFIG_KVM
797 extern phys_addr_t hyp_mem_base;
798 extern phys_addr_t hyp_mem_size;
799 void __init kvm_hyp_reserve(void);
800 #else
801 static inline void kvm_hyp_reserve(void) { }
802 #endif
803
804 #endif /* __ARM64_KVM_HOST_H__ */