2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * Derived from arch/arm/include/asm/kvm_host.h:
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef __ARM64_KVM_HOST_H__
23 #define __ARM64_KVM_HOST_H__
25 #include <linux/types.h>
26 #include <linux/kvm_types.h>
28 #include <asm/kvm_asm.h>
29 #include <asm/kvm_mmio.h>
31 #define __KVM_HAVE_ARCH_INTC_INITIALIZED
33 #define KVM_USER_MEM_SLOTS 32
34 #define KVM_PRIVATE_MEM_SLOTS 4
35 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
36 #define KVM_HALT_POLL_NS_DEFAULT 500000
38 #include <kvm/arm_vgic.h>
39 #include <kvm/arm_arch_timer.h>
40 #include <kvm/arm_pmu.h>
42 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS
44 #define KVM_VCPU_MAX_FEATURES 4
46 #define KVM_REQ_VCPU_EXIT 8
48 int __attribute_const__
kvm_target_cpu(void);
49 int kvm_reset_vcpu(struct kvm_vcpu
*vcpu
);
50 int kvm_arch_dev_ioctl_check_extension(struct kvm
*kvm
, long ext
);
51 void __extended_idmap_trampoline(phys_addr_t boot_pgd
, phys_addr_t idmap_start
);
54 /* The VMID generation used for the virt. memory system */
58 /* 1-level 2nd stage table and lock */
62 /* VTTBR value associated with above pgd and vmid */
65 /* The last vcpu id that ran on each physical CPU */
66 int __percpu
*last_vcpu_ran
;
68 /* The maximum number of vCPUs depends on the used GIC model */
71 /* Interrupt controller */
72 struct vgic_dist vgic
;
75 struct arch_timer_kvm timer
;
78 #define KVM_NR_MEM_OBJS 40
81 * We don't want allocation failures within the mmu code, so we preallocate
82 * enough memory for a single page fault in a cache.
84 struct kvm_mmu_memory_cache
{
86 void *objects
[KVM_NR_MEM_OBJS
];
89 struct kvm_vcpu_fault_info
{
90 u32 esr_el2
; /* Hyp Syndrom Register */
91 u64 far_el2
; /* Hyp Fault Address Register */
92 u64 hpfar_el2
; /* Hyp IPA Fault Address Register */
96 * 0 is reserved as an invalid value.
97 * Order should be kept in sync with the save/restore code.
101 MPIDR_EL1
, /* MultiProcessor Affinity Register */
102 CSSELR_EL1
, /* Cache Size Selection Register */
103 SCTLR_EL1
, /* System Control Register */
104 ACTLR_EL1
, /* Auxiliary Control Register */
105 CPACR_EL1
, /* Coprocessor Access Control */
106 TTBR0_EL1
, /* Translation Table Base Register 0 */
107 TTBR1_EL1
, /* Translation Table Base Register 1 */
108 TCR_EL1
, /* Translation Control Register */
109 ESR_EL1
, /* Exception Syndrome Register */
110 AFSR0_EL1
, /* Auxiliary Fault Status Register 0 */
111 AFSR1_EL1
, /* Auxiliary Fault Status Register 1 */
112 FAR_EL1
, /* Fault Address Register */
113 MAIR_EL1
, /* Memory Attribute Indirection Register */
114 VBAR_EL1
, /* Vector Base Address Register */
115 CONTEXTIDR_EL1
, /* Context ID Register */
116 TPIDR_EL0
, /* Thread ID, User R/W */
117 TPIDRRO_EL0
, /* Thread ID, User R/O */
118 TPIDR_EL1
, /* Thread ID, Privileged */
119 AMAIR_EL1
, /* Aux Memory Attribute Indirection Register */
120 CNTKCTL_EL1
, /* Timer Control Register (EL1) */
121 PAR_EL1
, /* Physical Address Register */
122 MDSCR_EL1
, /* Monitor Debug System Control Register */
123 MDCCINT_EL1
, /* Monitor Debug Comms Channel Interrupt Enable Reg */
125 /* Performance Monitors Registers */
126 PMCR_EL0
, /* Control Register */
127 PMSELR_EL0
, /* Event Counter Selection Register */
128 PMEVCNTR0_EL0
, /* Event Counter Register (0-30) */
129 PMEVCNTR30_EL0
= PMEVCNTR0_EL0
+ 30,
130 PMCCNTR_EL0
, /* Cycle Counter Register */
131 PMEVTYPER0_EL0
, /* Event Type Register (0-30) */
132 PMEVTYPER30_EL0
= PMEVTYPER0_EL0
+ 30,
133 PMCCFILTR_EL0
, /* Cycle Count Filter Register */
134 PMCNTENSET_EL0
, /* Count Enable Set Register */
135 PMINTENSET_EL1
, /* Interrupt Enable Set Register */
136 PMOVSSET_EL0
, /* Overflow Flag Status Set Register */
137 PMSWINC_EL0
, /* Software Increment Register */
138 PMUSERENR_EL0
, /* User Enable Register */
140 /* 32bit specific registers. Keep them at the end of the range */
141 DACR32_EL2
, /* Domain Access Control Register */
142 IFSR32_EL2
, /* Instruction Fault Status Register */
143 FPEXC32_EL2
, /* Floating-Point Exception Control Register */
144 DBGVCR32_EL2
, /* Debug Vector Catch Register */
146 NR_SYS_REGS
/* Nothing after this line! */
150 #define c0_MPIDR (MPIDR_EL1 * 2) /* MultiProcessor ID Register */
151 #define c0_CSSELR (CSSELR_EL1 * 2)/* Cache Size Selection Register */
152 #define c1_SCTLR (SCTLR_EL1 * 2) /* System Control Register */
153 #define c1_ACTLR (ACTLR_EL1 * 2) /* Auxiliary Control Register */
154 #define c1_CPACR (CPACR_EL1 * 2) /* Coprocessor Access Control */
155 #define c2_TTBR0 (TTBR0_EL1 * 2) /* Translation Table Base Register 0 */
156 #define c2_TTBR0_high (c2_TTBR0 + 1) /* TTBR0 top 32 bits */
157 #define c2_TTBR1 (TTBR1_EL1 * 2) /* Translation Table Base Register 1 */
158 #define c2_TTBR1_high (c2_TTBR1 + 1) /* TTBR1 top 32 bits */
159 #define c2_TTBCR (TCR_EL1 * 2) /* Translation Table Base Control R. */
160 #define c3_DACR (DACR32_EL2 * 2)/* Domain Access Control Register */
161 #define c5_DFSR (ESR_EL1 * 2) /* Data Fault Status Register */
162 #define c5_IFSR (IFSR32_EL2 * 2)/* Instruction Fault Status Register */
163 #define c5_ADFSR (AFSR0_EL1 * 2) /* Auxiliary Data Fault Status R */
164 #define c5_AIFSR (AFSR1_EL1 * 2) /* Auxiliary Instr Fault Status R */
165 #define c6_DFAR (FAR_EL1 * 2) /* Data Fault Address Register */
166 #define c6_IFAR (c6_DFAR + 1) /* Instruction Fault Address Register */
167 #define c7_PAR (PAR_EL1 * 2) /* Physical Address Register */
168 #define c7_PAR_high (c7_PAR + 1) /* PAR top 32 bits */
169 #define c10_PRRR (MAIR_EL1 * 2) /* Primary Region Remap Register */
170 #define c10_NMRR (c10_PRRR + 1) /* Normal Memory Remap Register */
171 #define c12_VBAR (VBAR_EL1 * 2) /* Vector Base Address Register */
172 #define c13_CID (CONTEXTIDR_EL1 * 2) /* Context ID Register */
173 #define c13_TID_URW (TPIDR_EL0 * 2) /* Thread ID, User R/W */
174 #define c13_TID_URO (TPIDRRO_EL0 * 2)/* Thread ID, User R/O */
175 #define c13_TID_PRIV (TPIDR_EL1 * 2) /* Thread ID, Privileged */
176 #define c10_AMAIR0 (AMAIR_EL1 * 2) /* Aux Memory Attr Indirection Reg */
177 #define c10_AMAIR1 (c10_AMAIR0 + 1)/* Aux Memory Attr Indirection Reg */
178 #define c14_CNTKCTL (CNTKCTL_EL1 * 2) /* Timer Control Register (PL1) */
180 #define cp14_DBGDSCRext (MDSCR_EL1 * 2)
181 #define cp14_DBGBCR0 (DBGBCR0_EL1 * 2)
182 #define cp14_DBGBVR0 (DBGBVR0_EL1 * 2)
183 #define cp14_DBGBXVR0 (cp14_DBGBVR0 + 1)
184 #define cp14_DBGWCR0 (DBGWCR0_EL1 * 2)
185 #define cp14_DBGWVR0 (DBGWVR0_EL1 * 2)
186 #define cp14_DBGDCCINT (MDCCINT_EL1 * 2)
188 #define NR_COPRO_REGS (NR_SYS_REGS * 2)
190 struct kvm_cpu_context
{
191 struct kvm_regs gp_regs
;
193 u64 sys_regs
[NR_SYS_REGS
];
194 u32 copro
[NR_COPRO_REGS
];
198 typedef struct kvm_cpu_context kvm_cpu_context_t
;
200 struct kvm_vcpu_arch
{
201 struct kvm_cpu_context ctxt
;
203 /* HYP configuration */
207 /* Exception Information */
208 struct kvm_vcpu_fault_info fault
;
210 /* Guest debug state */
214 * We maintain more than a single set of debug registers to support
215 * debugging the guest from the host and to maintain separate host and
216 * guest state during world switches. vcpu_debug_state are the debug
217 * registers of the vcpu as the guest sees them. host_debug_state are
218 * the host registers which are saved and restored during
219 * world switches. external_debug_state contains the debug
220 * values we want to debug the guest. This is set via the
221 * KVM_SET_GUEST_DEBUG ioctl.
223 * debug_ptr points to the set of debug registers that should be loaded
224 * onto the hardware when running the guest.
226 struct kvm_guest_debug_arch
*debug_ptr
;
227 struct kvm_guest_debug_arch vcpu_debug_state
;
228 struct kvm_guest_debug_arch external_debug_state
;
230 /* Pointer to host CPU context */
231 kvm_cpu_context_t
*host_cpu_context
;
232 struct kvm_guest_debug_arch host_debug_state
;
235 struct vgic_cpu vgic_cpu
;
236 struct arch_timer_cpu timer_cpu
;
240 * Anything that is not used directly from assembly code goes
245 * Guest registers we preserve during guest debugging.
247 * These shadow registers are updated by the kvm_handle_sys_reg
248 * trap handler if the guest accesses or updates them while we
249 * are using guest debug.
253 } guest_debug_preserved
;
255 /* vcpu power-off state */
258 /* Don't run the guest (internal implementation need) */
261 /* IO related fields */
262 struct kvm_decode mmio_decode
;
264 /* Interrupt related fields */
265 u64 irq_lines
; /* IRQ and FIQ levels */
267 /* Cache some mmu pages needed inside spinlock regions */
268 struct kvm_mmu_memory_cache mmu_page_cache
;
270 /* Target CPU and feature flags */
272 DECLARE_BITMAP(features
, KVM_VCPU_MAX_FEATURES
);
274 /* Detect first run of a vcpu */
278 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
279 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)])
281 * CP14 and CP15 live in the same array, as they are backed by the
282 * same system registers.
284 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)])
285 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)])
287 #ifdef CONFIG_CPU_BIG_ENDIAN
288 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r))
289 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1)
291 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1)
292 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r))
296 ulong remote_tlb_flush
;
299 struct kvm_vcpu_stat
{
300 u64 halt_successful_poll
;
301 u64 halt_attempted_poll
;
302 u64 halt_poll_invalid
;
308 u64 mmio_exit_kernel
;
312 int kvm_vcpu_preferred_target(struct kvm_vcpu_init
*init
);
313 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
314 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
315 int kvm_arm_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
316 int kvm_arm_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
318 #define KVM_ARCH_WANT_MMU_NOTIFIER
319 int kvm_unmap_hva(struct kvm
*kvm
, unsigned long hva
);
320 int kvm_unmap_hva_range(struct kvm
*kvm
,
321 unsigned long start
, unsigned long end
);
322 void kvm_set_spte_hva(struct kvm
*kvm
, unsigned long hva
, pte_t pte
);
323 int kvm_age_hva(struct kvm
*kvm
, unsigned long start
, unsigned long end
);
324 int kvm_test_age_hva(struct kvm
*kvm
, unsigned long hva
);
326 /* We do not have shadow page tables, hence the empty hooks */
327 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm
*kvm
,
328 unsigned long address
)
332 struct kvm_vcpu
*kvm_arm_get_running_vcpu(void);
333 struct kvm_vcpu
* __percpu
*kvm_get_running_vcpus(void);
334 void kvm_arm_halt_guest(struct kvm
*kvm
);
335 void kvm_arm_resume_guest(struct kvm
*kvm
);
336 void kvm_arm_halt_vcpu(struct kvm_vcpu
*vcpu
);
337 void kvm_arm_resume_vcpu(struct kvm_vcpu
*vcpu
);
339 u64
__kvm_call_hyp(void *hypfn
, ...);
340 #define kvm_call_hyp(f, ...) __kvm_call_hyp(kvm_ksym_ref(f), ##__VA_ARGS__)
342 void force_vm_exit(const cpumask_t
*mask
);
343 void kvm_mmu_wp_memory_region(struct kvm
*kvm
, int slot
);
345 int handle_exit(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
,
346 int exception_index
);
348 int kvm_perf_init(void);
349 int kvm_perf_teardown(void);
351 struct kvm_vcpu
*kvm_mpidr_to_vcpu(struct kvm
*kvm
, unsigned long mpidr
);
353 static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr
,
354 unsigned long hyp_stack_ptr
,
355 unsigned long vector_ptr
)
358 * Call initialization code, and switch to the full blown
361 __kvm_call_hyp((void *)pgd_ptr
, hyp_stack_ptr
, vector_ptr
);
364 void __kvm_hyp_teardown(void);
365 static inline void __cpu_reset_hyp_mode(unsigned long vector_ptr
,
366 phys_addr_t phys_idmap_start
)
368 kvm_call_hyp(__kvm_hyp_teardown
, phys_idmap_start
);
371 static inline void kvm_arch_hardware_unsetup(void) {}
372 static inline void kvm_arch_sync_events(struct kvm
*kvm
) {}
373 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
) {}
374 static inline void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
) {}
375 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu
*vcpu
) {}
377 void kvm_arm_init_debug(void);
378 void kvm_arm_setup_debug(struct kvm_vcpu
*vcpu
);
379 void kvm_arm_clear_debug(struct kvm_vcpu
*vcpu
);
380 void kvm_arm_reset_debug_ptr(struct kvm_vcpu
*vcpu
);
381 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu
*vcpu
,
382 struct kvm_device_attr
*attr
);
383 int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu
*vcpu
,
384 struct kvm_device_attr
*attr
);
385 int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu
*vcpu
,
386 struct kvm_device_attr
*attr
);
388 static inline void __cpu_init_stage2(void)
390 u32 parange
= kvm_call_hyp(__init_stage2_translation
);
392 WARN_ONCE(parange
< 40,
393 "PARange is %d bits, unsupported configuration!", parange
);
396 #endif /* __ARM64_KVM_HOST_H__ */