Merge tag '5.15-rc-cifs-part2' of git://git.samba.org/sfrench/cifs-2.6
[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 };
62 enum kvm_mode kvm_get_mode(void);
63
64 DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
65
66 extern unsigned int kvm_sve_max_vl;
67 int kvm_arm_init_sve(void);
68
69 u32 __attribute_const__ kvm_target_cpu(void);
70 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
71 void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu);
72
73 struct kvm_vmid {
74         /* The VMID generation used for the virt. memory system */
75         u64    vmid_gen;
76         u32    vmid;
77 };
78
79 struct kvm_s2_mmu {
80         struct kvm_vmid vmid;
81
82         /*
83          * stage2 entry level table
84          *
85          * Two kvm_s2_mmu structures in the same VM can point to the same
86          * pgd here.  This happens when running a guest using a
87          * translation regime that isn't affected by its own stage-2
88          * translation, such as a non-VHE hypervisor running at vEL2, or
89          * for vEL1/EL0 with vHCR_EL2.VM == 0.  In that case, we use the
90          * canonical stage-2 page tables.
91          */
92         phys_addr_t     pgd_phys;
93         struct kvm_pgtable *pgt;
94
95         /* The last vcpu id that ran on each physical CPU */
96         int __percpu *last_vcpu_ran;
97
98         struct kvm_arch *arch;
99 };
100
101 struct kvm_arch_memory_slot {
102 };
103
104 struct kvm_arch {
105         struct kvm_s2_mmu mmu;
106
107         /* VTCR_EL2 value for this VM */
108         u64    vtcr;
109
110         /* The maximum number of vCPUs depends on the used GIC model */
111         int max_vcpus;
112
113         /* Interrupt controller */
114         struct vgic_dist        vgic;
115
116         /* Mandated version of PSCI */
117         u32 psci_version;
118
119         /*
120          * If we encounter a data abort without valid instruction syndrome
121          * information, report this to user space.  User space can (and
122          * should) opt in to this feature if KVM_CAP_ARM_NISV_TO_USER is
123          * supported.
124          */
125         bool return_nisv_io_abort_to_user;
126
127         /*
128          * VM-wide PMU filter, implemented as a bitmap and big enough for
129          * up to 2^10 events (ARMv8.0) or 2^16 events (ARMv8.1+).
130          */
131         unsigned long *pmu_filter;
132         unsigned int pmuver;
133
134         u8 pfr0_csv2;
135         u8 pfr0_csv3;
136
137         /* Memory Tagging Extension enabled for the guest */
138         bool mte_enabled;
139 };
140
141 struct kvm_vcpu_fault_info {
142         u32 esr_el2;            /* Hyp Syndrom Register */
143         u64 far_el2;            /* Hyp Fault Address Register */
144         u64 hpfar_el2;          /* Hyp IPA Fault Address Register */
145         u64 disr_el1;           /* Deferred [SError] Status Register */
146 };
147
148 enum vcpu_sysreg {
149         __INVALID_SYSREG__,   /* 0 is reserved as an invalid value */
150         MPIDR_EL1,      /* MultiProcessor Affinity Register */
151         CSSELR_EL1,     /* Cache Size Selection Register */
152         SCTLR_EL1,      /* System Control Register */
153         ACTLR_EL1,      /* Auxiliary Control Register */
154         CPACR_EL1,      /* Coprocessor Access Control */
155         ZCR_EL1,        /* SVE Control */
156         TTBR0_EL1,      /* Translation Table Base Register 0 */
157         TTBR1_EL1,      /* Translation Table Base Register 1 */
158         TCR_EL1,        /* Translation Control Register */
159         ESR_EL1,        /* Exception Syndrome Register */
160         AFSR0_EL1,      /* Auxiliary Fault Status Register 0 */
161         AFSR1_EL1,      /* Auxiliary Fault Status Register 1 */
162         FAR_EL1,        /* Fault Address Register */
163         MAIR_EL1,       /* Memory Attribute Indirection Register */
164         VBAR_EL1,       /* Vector Base Address Register */
165         CONTEXTIDR_EL1, /* Context ID Register */
166         TPIDR_EL0,      /* Thread ID, User R/W */
167         TPIDRRO_EL0,    /* Thread ID, User R/O */
168         TPIDR_EL1,      /* Thread ID, Privileged */
169         AMAIR_EL1,      /* Aux Memory Attribute Indirection Register */
170         CNTKCTL_EL1,    /* Timer Control Register (EL1) */
171         PAR_EL1,        /* Physical Address Register */
172         MDSCR_EL1,      /* Monitor Debug System Control Register */
173         MDCCINT_EL1,    /* Monitor Debug Comms Channel Interrupt Enable Reg */
174         DISR_EL1,       /* Deferred Interrupt Status Register */
175
176         /* Performance Monitors Registers */
177         PMCR_EL0,       /* Control Register */
178         PMSELR_EL0,     /* Event Counter Selection Register */
179         PMEVCNTR0_EL0,  /* Event Counter Register (0-30) */
180         PMEVCNTR30_EL0 = PMEVCNTR0_EL0 + 30,
181         PMCCNTR_EL0,    /* Cycle Counter Register */
182         PMEVTYPER0_EL0, /* Event Type Register (0-30) */
183         PMEVTYPER30_EL0 = PMEVTYPER0_EL0 + 30,
184         PMCCFILTR_EL0,  /* Cycle Count Filter Register */
185         PMCNTENSET_EL0, /* Count Enable Set Register */
186         PMINTENSET_EL1, /* Interrupt Enable Set Register */
187         PMOVSSET_EL0,   /* Overflow Flag Status Set Register */
188         PMUSERENR_EL0,  /* User Enable Register */
189
190         /* Pointer Authentication Registers in a strict increasing order. */
191         APIAKEYLO_EL1,
192         APIAKEYHI_EL1,
193         APIBKEYLO_EL1,
194         APIBKEYHI_EL1,
195         APDAKEYLO_EL1,
196         APDAKEYHI_EL1,
197         APDBKEYLO_EL1,
198         APDBKEYHI_EL1,
199         APGAKEYLO_EL1,
200         APGAKEYHI_EL1,
201
202         ELR_EL1,
203         SP_EL1,
204         SPSR_EL1,
205
206         CNTVOFF_EL2,
207         CNTV_CVAL_EL0,
208         CNTV_CTL_EL0,
209         CNTP_CVAL_EL0,
210         CNTP_CTL_EL0,
211
212         /* Memory Tagging Extension registers */
213         RGSR_EL1,       /* Random Allocation Tag Seed Register */
214         GCR_EL1,        /* Tag Control Register */
215         TFSR_EL1,       /* Tag Fault Status Register (EL1) */
216         TFSRE0_EL1,     /* Tag Fault Status Register (EL0) */
217
218         /* 32bit specific registers. Keep them at the end of the range */
219         DACR32_EL2,     /* Domain Access Control Register */
220         IFSR32_EL2,     /* Instruction Fault Status Register */
221         FPEXC32_EL2,    /* Floating-Point Exception Control Register */
222         DBGVCR32_EL2,   /* Debug Vector Catch Register */
223
224         NR_SYS_REGS     /* Nothing after this line! */
225 };
226
227 struct kvm_cpu_context {
228         struct user_pt_regs regs;       /* sp = sp_el0 */
229
230         u64     spsr_abt;
231         u64     spsr_und;
232         u64     spsr_irq;
233         u64     spsr_fiq;
234
235         struct user_fpsimd_state fp_regs;
236
237         u64 sys_regs[NR_SYS_REGS];
238
239         struct kvm_vcpu *__hyp_running_vcpu;
240 };
241
242 struct kvm_pmu_events {
243         u32 events_host;
244         u32 events_guest;
245 };
246
247 struct kvm_host_data {
248         struct kvm_cpu_context host_ctxt;
249         struct kvm_pmu_events pmu_events;
250 };
251
252 struct kvm_host_psci_config {
253         /* PSCI version used by host. */
254         u32 version;
255
256         /* Function IDs used by host if version is v0.1. */
257         struct psci_0_1_function_ids function_ids_0_1;
258
259         bool psci_0_1_cpu_suspend_implemented;
260         bool psci_0_1_cpu_on_implemented;
261         bool psci_0_1_cpu_off_implemented;
262         bool psci_0_1_migrate_implemented;
263 };
264
265 extern struct kvm_host_psci_config kvm_nvhe_sym(kvm_host_psci_config);
266 #define kvm_host_psci_config CHOOSE_NVHE_SYM(kvm_host_psci_config)
267
268 extern s64 kvm_nvhe_sym(hyp_physvirt_offset);
269 #define hyp_physvirt_offset CHOOSE_NVHE_SYM(hyp_physvirt_offset)
270
271 extern u64 kvm_nvhe_sym(hyp_cpu_logical_map)[NR_CPUS];
272 #define hyp_cpu_logical_map CHOOSE_NVHE_SYM(hyp_cpu_logical_map)
273
274 struct vcpu_reset_state {
275         unsigned long   pc;
276         unsigned long   r0;
277         bool            be;
278         bool            reset;
279 };
280
281 struct kvm_vcpu_arch {
282         struct kvm_cpu_context ctxt;
283         void *sve_state;
284         unsigned int sve_max_vl;
285
286         /* Stage 2 paging state used by the hardware on next switch */
287         struct kvm_s2_mmu *hw_mmu;
288
289         /* Values of trap registers for the guest. */
290         u64 hcr_el2;
291         u64 mdcr_el2;
292         u64 cptr_el2;
293
294         /* Values of trap registers for the host before guest entry. */
295         u64 mdcr_el2_host;
296
297         /* Exception Information */
298         struct kvm_vcpu_fault_info fault;
299
300         /* State of various workarounds, see kvm_asm.h for bit assignment */
301         u64 workaround_flags;
302
303         /* Miscellaneous vcpu state flags */
304         u64 flags;
305
306         /*
307          * We maintain more than a single set of debug registers to support
308          * debugging the guest from the host and to maintain separate host and
309          * guest state during world switches. vcpu_debug_state are the debug
310          * registers of the vcpu as the guest sees them.  host_debug_state are
311          * the host registers which are saved and restored during
312          * world switches. external_debug_state contains the debug
313          * values we want to debug the guest. This is set via the
314          * KVM_SET_GUEST_DEBUG ioctl.
315          *
316          * debug_ptr points to the set of debug registers that should be loaded
317          * onto the hardware when running the guest.
318          */
319         struct kvm_guest_debug_arch *debug_ptr;
320         struct kvm_guest_debug_arch vcpu_debug_state;
321         struct kvm_guest_debug_arch external_debug_state;
322
323         struct thread_info *host_thread_info;   /* hyp VA */
324         struct user_fpsimd_state *host_fpsimd_state;    /* hyp VA */
325
326         struct {
327                 /* {Break,watch}point registers */
328                 struct kvm_guest_debug_arch regs;
329                 /* Statistical profiling extension */
330                 u64 pmscr_el1;
331                 /* Self-hosted trace */
332                 u64 trfcr_el1;
333         } host_debug_state;
334
335         /* VGIC state */
336         struct vgic_cpu vgic_cpu;
337         struct arch_timer_cpu timer_cpu;
338         struct kvm_pmu pmu;
339
340         /*
341          * Anything that is not used directly from assembly code goes
342          * here.
343          */
344
345         /*
346          * Guest registers we preserve during guest debugging.
347          *
348          * These shadow registers are updated by the kvm_handle_sys_reg
349          * trap handler if the guest accesses or updates them while we
350          * are using guest debug.
351          */
352         struct {
353                 u32     mdscr_el1;
354         } guest_debug_preserved;
355
356         /* vcpu power-off state */
357         bool power_off;
358
359         /* Don't run the guest (internal implementation need) */
360         bool pause;
361
362         /* Cache some mmu pages needed inside spinlock regions */
363         struct kvm_mmu_memory_cache mmu_page_cache;
364
365         /* Target CPU and feature flags */
366         int target;
367         DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
368
369         /* Detect first run of a vcpu */
370         bool has_run_once;
371
372         /* Virtual SError ESR to restore when HCR_EL2.VSE is set */
373         u64 vsesr_el2;
374
375         /* Additional reset state */
376         struct vcpu_reset_state reset_state;
377
378         /* True when deferrable sysregs are loaded on the physical CPU,
379          * see kvm_vcpu_load_sysregs_vhe and kvm_vcpu_put_sysregs_vhe. */
380         bool sysregs_loaded_on_cpu;
381
382         /* Guest PV state */
383         struct {
384                 u64 last_steal;
385                 gpa_t base;
386         } steal;
387 };
388
389 /* Pointer to the vcpu's SVE FFR for sve_{save,load}_state() */
390 #define vcpu_sve_pffr(vcpu) (kern_hyp_va((vcpu)->arch.sve_state) +      \
391                              sve_ffr_offset((vcpu)->arch.sve_max_vl))
392
393 #define vcpu_sve_max_vq(vcpu)   sve_vq_from_vl((vcpu)->arch.sve_max_vl)
394
395 #define vcpu_sve_state_size(vcpu) ({                                    \
396         size_t __size_ret;                                              \
397         unsigned int __vcpu_vq;                                         \
398                                                                         \
399         if (WARN_ON(!sve_vl_valid((vcpu)->arch.sve_max_vl))) {          \
400                 __size_ret = 0;                                         \
401         } else {                                                        \
402                 __vcpu_vq = vcpu_sve_max_vq(vcpu);                      \
403                 __size_ret = SVE_SIG_REGS_SIZE(__vcpu_vq);              \
404         }                                                               \
405                                                                         \
406         __size_ret;                                                     \
407 })
408
409 /* vcpu_arch flags field values: */
410 #define KVM_ARM64_DEBUG_DIRTY           (1 << 0)
411 #define KVM_ARM64_FP_ENABLED            (1 << 1) /* guest FP regs loaded */
412 #define KVM_ARM64_FP_HOST               (1 << 2) /* host FP regs loaded */
413 #define KVM_ARM64_HOST_SVE_IN_USE       (1 << 3) /* backup for host TIF_SVE */
414 #define KVM_ARM64_HOST_SVE_ENABLED      (1 << 4) /* SVE enabled for EL0 */
415 #define KVM_ARM64_GUEST_HAS_SVE         (1 << 5) /* SVE exposed to guest */
416 #define KVM_ARM64_VCPU_SVE_FINALIZED    (1 << 6) /* SVE config completed */
417 #define KVM_ARM64_GUEST_HAS_PTRAUTH     (1 << 7) /* PTRAUTH exposed to guest */
418 #define KVM_ARM64_PENDING_EXCEPTION     (1 << 8) /* Exception pending */
419 #define KVM_ARM64_EXCEPT_MASK           (7 << 9) /* Target EL/MODE */
420 #define KVM_ARM64_DEBUG_STATE_SAVE_SPE  (1 << 12) /* Save SPE context if active  */
421 #define KVM_ARM64_DEBUG_STATE_SAVE_TRBE (1 << 13) /* Save TRBE context if active  */
422
423 #define KVM_GUESTDBG_VALID_MASK (KVM_GUESTDBG_ENABLE | \
424                                  KVM_GUESTDBG_USE_SW_BP | \
425                                  KVM_GUESTDBG_USE_HW | \
426                                  KVM_GUESTDBG_SINGLESTEP)
427 /*
428  * When KVM_ARM64_PENDING_EXCEPTION is set, KVM_ARM64_EXCEPT_MASK can
429  * take the following values:
430  *
431  * For AArch32 EL1:
432  */
433 #define KVM_ARM64_EXCEPT_AA32_UND       (0 << 9)
434 #define KVM_ARM64_EXCEPT_AA32_IABT      (1 << 9)
435 #define KVM_ARM64_EXCEPT_AA32_DABT      (2 << 9)
436 /* For AArch64: */
437 #define KVM_ARM64_EXCEPT_AA64_ELx_SYNC  (0 << 9)
438 #define KVM_ARM64_EXCEPT_AA64_ELx_IRQ   (1 << 9)
439 #define KVM_ARM64_EXCEPT_AA64_ELx_FIQ   (2 << 9)
440 #define KVM_ARM64_EXCEPT_AA64_ELx_SERR  (3 << 9)
441 #define KVM_ARM64_EXCEPT_AA64_EL1       (0 << 11)
442 #define KVM_ARM64_EXCEPT_AA64_EL2       (1 << 11)
443
444 /*
445  * Overlaps with KVM_ARM64_EXCEPT_MASK on purpose so that it can't be
446  * set together with an exception...
447  */
448 #define KVM_ARM64_INCREMENT_PC          (1 << 9) /* Increment PC */
449
450 #define vcpu_has_sve(vcpu) (system_supports_sve() &&                    \
451                             ((vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_SVE))
452
453 #ifdef CONFIG_ARM64_PTR_AUTH
454 #define vcpu_has_ptrauth(vcpu)                                          \
455         ((cpus_have_final_cap(ARM64_HAS_ADDRESS_AUTH) ||                \
456           cpus_have_final_cap(ARM64_HAS_GENERIC_AUTH)) &&               \
457          (vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_PTRAUTH)
458 #else
459 #define vcpu_has_ptrauth(vcpu)          false
460 #endif
461
462 #define vcpu_gp_regs(v)         (&(v)->arch.ctxt.regs)
463
464 /*
465  * Only use __vcpu_sys_reg/ctxt_sys_reg if you know you want the
466  * memory backed version of a register, and not the one most recently
467  * accessed by a running VCPU.  For example, for userspace access or
468  * for system registers that are never context switched, but only
469  * emulated.
470  */
471 #define __ctxt_sys_reg(c,r)     (&(c)->sys_regs[(r)])
472
473 #define ctxt_sys_reg(c,r)       (*__ctxt_sys_reg(c,r))
474
475 #define __vcpu_sys_reg(v,r)     (ctxt_sys_reg(&(v)->arch.ctxt, (r)))
476
477 u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg);
478 void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg);
479
480 static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val)
481 {
482         /*
483          * *** VHE ONLY ***
484          *
485          * System registers listed in the switch are not saved on every
486          * exit from the guest but are only saved on vcpu_put.
487          *
488          * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but
489          * should never be listed below, because the guest cannot modify its
490          * own MPIDR_EL1 and MPIDR_EL1 is accessed for VCPU A from VCPU B's
491          * thread when emulating cross-VCPU communication.
492          */
493         if (!has_vhe())
494                 return false;
495
496         switch (reg) {
497         case CSSELR_EL1:        *val = read_sysreg_s(SYS_CSSELR_EL1);   break;
498         case SCTLR_EL1:         *val = read_sysreg_s(SYS_SCTLR_EL12);   break;
499         case CPACR_EL1:         *val = read_sysreg_s(SYS_CPACR_EL12);   break;
500         case TTBR0_EL1:         *val = read_sysreg_s(SYS_TTBR0_EL12);   break;
501         case TTBR1_EL1:         *val = read_sysreg_s(SYS_TTBR1_EL12);   break;
502         case TCR_EL1:           *val = read_sysreg_s(SYS_TCR_EL12);     break;
503         case ESR_EL1:           *val = read_sysreg_s(SYS_ESR_EL12);     break;
504         case AFSR0_EL1:         *val = read_sysreg_s(SYS_AFSR0_EL12);   break;
505         case AFSR1_EL1:         *val = read_sysreg_s(SYS_AFSR1_EL12);   break;
506         case FAR_EL1:           *val = read_sysreg_s(SYS_FAR_EL12);     break;
507         case MAIR_EL1:          *val = read_sysreg_s(SYS_MAIR_EL12);    break;
508         case VBAR_EL1:          *val = read_sysreg_s(SYS_VBAR_EL12);    break;
509         case CONTEXTIDR_EL1:    *val = read_sysreg_s(SYS_CONTEXTIDR_EL12);break;
510         case TPIDR_EL0:         *val = read_sysreg_s(SYS_TPIDR_EL0);    break;
511         case TPIDRRO_EL0:       *val = read_sysreg_s(SYS_TPIDRRO_EL0);  break;
512         case TPIDR_EL1:         *val = read_sysreg_s(SYS_TPIDR_EL1);    break;
513         case AMAIR_EL1:         *val = read_sysreg_s(SYS_AMAIR_EL12);   break;
514         case CNTKCTL_EL1:       *val = read_sysreg_s(SYS_CNTKCTL_EL12); break;
515         case ELR_EL1:           *val = read_sysreg_s(SYS_ELR_EL12);     break;
516         case PAR_EL1:           *val = read_sysreg_par();               break;
517         case DACR32_EL2:        *val = read_sysreg_s(SYS_DACR32_EL2);   break;
518         case IFSR32_EL2:        *val = read_sysreg_s(SYS_IFSR32_EL2);   break;
519         case DBGVCR32_EL2:      *val = read_sysreg_s(SYS_DBGVCR32_EL2); break;
520         default:                return false;
521         }
522
523         return true;
524 }
525
526 static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
527 {
528         /*
529          * *** VHE ONLY ***
530          *
531          * System registers listed in the switch are not restored on every
532          * entry to the guest but are only restored on vcpu_load.
533          *
534          * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but
535          * should never be listed below, because the MPIDR should only be set
536          * once, before running the VCPU, and never changed later.
537          */
538         if (!has_vhe())
539                 return false;
540
541         switch (reg) {
542         case CSSELR_EL1:        write_sysreg_s(val, SYS_CSSELR_EL1);    break;
543         case SCTLR_EL1:         write_sysreg_s(val, SYS_SCTLR_EL12);    break;
544         case CPACR_EL1:         write_sysreg_s(val, SYS_CPACR_EL12);    break;
545         case TTBR0_EL1:         write_sysreg_s(val, SYS_TTBR0_EL12);    break;
546         case TTBR1_EL1:         write_sysreg_s(val, SYS_TTBR1_EL12);    break;
547         case TCR_EL1:           write_sysreg_s(val, SYS_TCR_EL12);      break;
548         case ESR_EL1:           write_sysreg_s(val, SYS_ESR_EL12);      break;
549         case AFSR0_EL1:         write_sysreg_s(val, SYS_AFSR0_EL12);    break;
550         case AFSR1_EL1:         write_sysreg_s(val, SYS_AFSR1_EL12);    break;
551         case FAR_EL1:           write_sysreg_s(val, SYS_FAR_EL12);      break;
552         case MAIR_EL1:          write_sysreg_s(val, SYS_MAIR_EL12);     break;
553         case VBAR_EL1:          write_sysreg_s(val, SYS_VBAR_EL12);     break;
554         case CONTEXTIDR_EL1:    write_sysreg_s(val, SYS_CONTEXTIDR_EL12);break;
555         case TPIDR_EL0:         write_sysreg_s(val, SYS_TPIDR_EL0);     break;
556         case TPIDRRO_EL0:       write_sysreg_s(val, SYS_TPIDRRO_EL0);   break;
557         case TPIDR_EL1:         write_sysreg_s(val, SYS_TPIDR_EL1);     break;
558         case AMAIR_EL1:         write_sysreg_s(val, SYS_AMAIR_EL12);    break;
559         case CNTKCTL_EL1:       write_sysreg_s(val, SYS_CNTKCTL_EL12);  break;
560         case ELR_EL1:           write_sysreg_s(val, SYS_ELR_EL12);      break;
561         case PAR_EL1:           write_sysreg_s(val, SYS_PAR_EL1);       break;
562         case DACR32_EL2:        write_sysreg_s(val, SYS_DACR32_EL2);    break;
563         case IFSR32_EL2:        write_sysreg_s(val, SYS_IFSR32_EL2);    break;
564         case DBGVCR32_EL2:      write_sysreg_s(val, SYS_DBGVCR32_EL2);  break;
565         default:                return false;
566         }
567
568         return true;
569 }
570
571 struct kvm_vm_stat {
572         struct kvm_vm_stat_generic generic;
573 };
574
575 struct kvm_vcpu_stat {
576         struct kvm_vcpu_stat_generic generic;
577         u64 hvc_exit_stat;
578         u64 wfe_exit_stat;
579         u64 wfi_exit_stat;
580         u64 mmio_exit_user;
581         u64 mmio_exit_kernel;
582         u64 signal_exits;
583         u64 exits;
584 };
585
586 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
587 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
588 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
589 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
590 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
591
592 unsigned long kvm_arm_num_sys_reg_descs(struct kvm_vcpu *vcpu);
593 int kvm_arm_copy_sys_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
594 int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
595 int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
596
597 int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
598                               struct kvm_vcpu_events *events);
599
600 int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
601                               struct kvm_vcpu_events *events);
602
603 #define KVM_ARCH_WANT_MMU_NOTIFIER
604
605 void kvm_arm_halt_guest(struct kvm *kvm);
606 void kvm_arm_resume_guest(struct kvm *kvm);
607
608 #ifndef __KVM_NVHE_HYPERVISOR__
609 #define kvm_call_hyp_nvhe(f, ...)                                               \
610         ({                                                              \
611                 struct arm_smccc_res res;                               \
612                                                                         \
613                 arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(f),               \
614                                   ##__VA_ARGS__, &res);                 \
615                 WARN_ON(res.a0 != SMCCC_RET_SUCCESS);                   \
616                                                                         \
617                 res.a1;                                                 \
618         })
619
620 /*
621  * The couple of isb() below are there to guarantee the same behaviour
622  * on VHE as on !VHE, where the eret to EL1 acts as a context
623  * synchronization event.
624  */
625 #define kvm_call_hyp(f, ...)                                            \
626         do {                                                            \
627                 if (has_vhe()) {                                        \
628                         f(__VA_ARGS__);                                 \
629                         isb();                                          \
630                 } else {                                                \
631                         kvm_call_hyp_nvhe(f, ##__VA_ARGS__);            \
632                 }                                                       \
633         } while(0)
634
635 #define kvm_call_hyp_ret(f, ...)                                        \
636         ({                                                              \
637                 typeof(f(__VA_ARGS__)) ret;                             \
638                                                                         \
639                 if (has_vhe()) {                                        \
640                         ret = f(__VA_ARGS__);                           \
641                         isb();                                          \
642                 } else {                                                \
643                         ret = kvm_call_hyp_nvhe(f, ##__VA_ARGS__);      \
644                 }                                                       \
645                                                                         \
646                 ret;                                                    \
647         })
648 #else /* __KVM_NVHE_HYPERVISOR__ */
649 #define kvm_call_hyp(f, ...) f(__VA_ARGS__)
650 #define kvm_call_hyp_ret(f, ...) f(__VA_ARGS__)
651 #define kvm_call_hyp_nvhe(f, ...) f(__VA_ARGS__)
652 #endif /* __KVM_NVHE_HYPERVISOR__ */
653
654 void force_vm_exit(const cpumask_t *mask);
655
656 int handle_exit(struct kvm_vcpu *vcpu, int exception_index);
657 void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index);
658
659 int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu);
660 int kvm_handle_cp14_32(struct kvm_vcpu *vcpu);
661 int kvm_handle_cp14_64(struct kvm_vcpu *vcpu);
662 int kvm_handle_cp15_32(struct kvm_vcpu *vcpu);
663 int kvm_handle_cp15_64(struct kvm_vcpu *vcpu);
664 int kvm_handle_sys_reg(struct kvm_vcpu *vcpu);
665
666 void kvm_reset_sys_regs(struct kvm_vcpu *vcpu);
667
668 void kvm_sys_reg_table_init(void);
669
670 /* MMIO helpers */
671 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data);
672 unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len);
673
674 int kvm_handle_mmio_return(struct kvm_vcpu *vcpu);
675 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa);
676
677 int kvm_perf_init(void);
678 int kvm_perf_teardown(void);
679
680 long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu);
681 gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu);
682 void kvm_update_stolen_time(struct kvm_vcpu *vcpu);
683
684 bool kvm_arm_pvtime_supported(void);
685 int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
686                             struct kvm_device_attr *attr);
687 int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu,
688                             struct kvm_device_attr *attr);
689 int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu,
690                             struct kvm_device_attr *attr);
691
692 static inline void kvm_arm_pvtime_vcpu_init(struct kvm_vcpu_arch *vcpu_arch)
693 {
694         vcpu_arch->steal.base = GPA_INVALID;
695 }
696
697 static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch)
698 {
699         return (vcpu_arch->steal.base != GPA_INVALID);
700 }
701
702 void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome);
703
704 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
705
706 DECLARE_KVM_HYP_PER_CPU(struct kvm_host_data, kvm_host_data);
707
708 static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt)
709 {
710         /* The host's MPIDR is immutable, so let's set it up at boot time */
711         ctxt_sys_reg(cpu_ctxt, MPIDR_EL1) = read_cpuid_mpidr();
712 }
713
714 void kvm_arm_vcpu_ptrauth_trap(struct kvm_vcpu *vcpu);
715
716 static inline void kvm_arch_hardware_unsetup(void) {}
717 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
718 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
719 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
720
721 void kvm_arm_init_debug(void);
722 void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu);
723 void kvm_arm_setup_debug(struct kvm_vcpu *vcpu);
724 void kvm_arm_clear_debug(struct kvm_vcpu *vcpu);
725 void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu);
726 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
727                                struct kvm_device_attr *attr);
728 int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
729                                struct kvm_device_attr *attr);
730 int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
731                                struct kvm_device_attr *attr);
732
733 long kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm,
734                                 struct kvm_arm_copy_mte_tags *copy_tags);
735
736 /* Guest/host FPSIMD coordination helpers */
737 int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu);
738 void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu);
739 void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu);
740 void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu);
741
742 static inline bool kvm_pmu_counter_deferred(struct perf_event_attr *attr)
743 {
744         return (!has_vhe() && attr->exclude_host);
745 }
746
747 /* Flags for host debug state */
748 void kvm_arch_vcpu_load_debug_state_flags(struct kvm_vcpu *vcpu);
749 void kvm_arch_vcpu_put_debug_state_flags(struct kvm_vcpu *vcpu);
750
751 #ifdef CONFIG_KVM /* Avoid conflicts with core headers if CONFIG_KVM=n */
752 static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
753 {
754         return kvm_arch_vcpu_run_map_fp(vcpu);
755 }
756
757 void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr);
758 void kvm_clr_pmu_events(u32 clr);
759
760 void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu);
761 void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu);
762 #else
763 static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {}
764 static inline void kvm_clr_pmu_events(u32 clr) {}
765 #endif
766
767 void kvm_vcpu_load_sysregs_vhe(struct kvm_vcpu *vcpu);
768 void kvm_vcpu_put_sysregs_vhe(struct kvm_vcpu *vcpu);
769
770 int kvm_set_ipa_limit(void);
771
772 #define __KVM_HAVE_ARCH_VM_ALLOC
773 struct kvm *kvm_arch_alloc_vm(void);
774 void kvm_arch_free_vm(struct kvm *kvm);
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 int kvm_arm_vcpu_finalize(struct kvm_vcpu *vcpu, int feature);
784 bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu);
785
786 #define kvm_arm_vcpu_sve_finalized(vcpu) \
787         ((vcpu)->arch.flags & KVM_ARM64_VCPU_SVE_FINALIZED)
788
789 #define kvm_has_mte(kvm) (system_supports_mte() && (kvm)->arch.mte_enabled)
790 #define kvm_vcpu_has_pmu(vcpu)                                  \
791         (test_bit(KVM_ARM_VCPU_PMU_V3, (vcpu)->arch.features))
792
793 int kvm_trng_call(struct kvm_vcpu *vcpu);
794 #ifdef CONFIG_KVM
795 extern phys_addr_t hyp_mem_base;
796 extern phys_addr_t hyp_mem_size;
797 void __init kvm_hyp_reserve(void);
798 #else
799 static inline void kvm_hyp_reserve(void) { }
800 #endif
801
802 #endif /* __ARM64_KVM_HOST_H__ */