extern bool host_cpu_is_intel;
extern bool host_cpu_is_amd;
+enum vm_guest_x86_subtype {
+ VM_SUBTYPE_NONE = 0,
+ VM_SUBTYPE_SEV,
+ VM_SUBTYPE_SEV_ES,
+};
+
+/* Forced emulation prefix, used to invoke the emulator unconditionally. */
+#define KVM_FEP "ud2; .byte 'k', 'v', 'm';"
+
#define NMI_VECTOR 0x02
#define X86_EFLAGS_FIXED (1u << 1)
#define X86_PROPERTY_MAX_EXT_LEAF KVM_X86_CPU_PROPERTY(0x80000000, 0, EAX, 0, 31)
#define X86_PROPERTY_MAX_PHY_ADDR KVM_X86_CPU_PROPERTY(0x80000008, 0, EAX, 0, 7)
#define X86_PROPERTY_MAX_VIRT_ADDR KVM_X86_CPU_PROPERTY(0x80000008, 0, EAX, 8, 15)
+#define X86_PROPERTY_SEV_C_BIT KVM_X86_CPU_PROPERTY(0x8000001F, 0, EBX, 0, 5)
#define X86_PROPERTY_PHYS_ADDR_REDUCTION KVM_X86_CPU_PROPERTY(0x8000001F, 0, EBX, 6, 11)
#define X86_PROPERTY_MAX_CENTAUR_LEAF KVM_X86_CPU_PROPERTY(0xC0000000, 0, EAX, 0, 31)
* that indicates the feature is _not_ supported, and a property that states
* the length of the bit mask of unsupported features. A feature is supported
* if the size of the bit mask is larger than the "unavailable" bit, and said
- * bit is not set.
+ * bit is not set. Fixed counters also bizarre enumeration, but inverted from
+ * arch events for general purpose counters. Fixed counters are supported if a
+ * feature flag is set **OR** the total number of fixed counters is greater
+ * than index of the counter.
*
- * Wrap the "unavailable" feature to simplify checking whether or not a given
- * architectural event is supported.
+ * Wrap the events for general purpose and fixed counters to simplify checking
+ * whether or not a given architectural event is supported.
*/
struct kvm_x86_pmu_feature {
- struct kvm_x86_cpu_feature anti_feature;
+ struct kvm_x86_cpu_feature f;
};
-#define KVM_X86_PMU_FEATURE(name, __bit) \
-({ \
- struct kvm_x86_pmu_feature feature = { \
- .anti_feature = KVM_X86_CPU_FEATURE(0xa, 0, EBX, __bit), \
- }; \
- \
- feature; \
+#define KVM_X86_PMU_FEATURE(__reg, __bit) \
+({ \
+ struct kvm_x86_pmu_feature feature = { \
+ .f = KVM_X86_CPU_FEATURE(0xa, 0, __reg, __bit), \
+ }; \
+ \
+ kvm_static_assert(KVM_CPUID_##__reg == KVM_CPUID_EBX || \
+ KVM_CPUID_##__reg == KVM_CPUID_ECX); \
+ feature; \
})
-#define X86_PMU_FEATURE_BRANCH_INSNS_RETIRED KVM_X86_PMU_FEATURE(BRANCH_INSNS_RETIRED, 5)
+#define X86_PMU_FEATURE_CPU_CYCLES KVM_X86_PMU_FEATURE(EBX, 0)
+#define X86_PMU_FEATURE_INSNS_RETIRED KVM_X86_PMU_FEATURE(EBX, 1)
+#define X86_PMU_FEATURE_REFERENCE_CYCLES KVM_X86_PMU_FEATURE(EBX, 2)
+#define X86_PMU_FEATURE_LLC_REFERENCES KVM_X86_PMU_FEATURE(EBX, 3)
+#define X86_PMU_FEATURE_LLC_MISSES KVM_X86_PMU_FEATURE(EBX, 4)
+#define X86_PMU_FEATURE_BRANCH_INSNS_RETIRED KVM_X86_PMU_FEATURE(EBX, 5)
+#define X86_PMU_FEATURE_BRANCHES_MISPREDICTED KVM_X86_PMU_FEATURE(EBX, 6)
+#define X86_PMU_FEATURE_TOPDOWN_SLOTS KVM_X86_PMU_FEATURE(EBX, 7)
+
+#define X86_PMU_FEATURE_INSNS_RETIRED_FIXED KVM_X86_PMU_FEATURE(ECX, 0)
+#define X86_PMU_FEATURE_CPU_CYCLES_FIXED KVM_X86_PMU_FEATURE(ECX, 1)
+#define X86_PMU_FEATURE_REFERENCE_TSC_CYCLES_FIXED KVM_X86_PMU_FEATURE(ECX, 2)
+#define X86_PMU_FEATURE_TOPDOWN_SLOTS_FIXED KVM_X86_PMU_FEATURE(ECX, 3)
static inline unsigned int x86_family(unsigned int eax)
{
static inline bool this_pmu_has(struct kvm_x86_pmu_feature feature)
{
- uint32_t nr_bits = this_cpu_property(X86_PROPERTY_PMU_EBX_BIT_VECTOR_LENGTH);
+ uint32_t nr_bits;
+
+ if (feature.f.reg == KVM_CPUID_EBX) {
+ nr_bits = this_cpu_property(X86_PROPERTY_PMU_EBX_BIT_VECTOR_LENGTH);
+ return nr_bits > feature.f.bit && !this_cpu_has(feature.f);
+ }
- return nr_bits > feature.anti_feature.bit &&
- !this_cpu_has(feature.anti_feature);
+ GUEST_ASSERT(feature.f.reg == KVM_CPUID_ECX);
+ nr_bits = this_cpu_property(X86_PROPERTY_PMU_NR_FIXED_COUNTERS);
+ return nr_bits > feature.f.bit || this_cpu_has(feature.f);
}
static __always_inline uint64_t this_cpu_supported_xcr0(void)
static inline bool kvm_pmu_has(struct kvm_x86_pmu_feature feature)
{
- uint32_t nr_bits = kvm_cpu_property(X86_PROPERTY_PMU_EBX_BIT_VECTOR_LENGTH);
+ uint32_t nr_bits;
- return nr_bits > feature.anti_feature.bit &&
- !kvm_cpu_has(feature.anti_feature);
+ if (feature.f.reg == KVM_CPUID_EBX) {
+ nr_bits = kvm_cpu_property(X86_PROPERTY_PMU_EBX_BIT_VECTOR_LENGTH);
+ return nr_bits > feature.f.bit && !kvm_cpu_has(feature.f);
+ }
+
+ TEST_ASSERT_EQ(feature.f.reg, KVM_CPUID_ECX);
+ nr_bits = kvm_cpu_property(X86_PROPERTY_PMU_NR_FIXED_COUNTERS);
+ return nr_bits > feature.f.bit || kvm_cpu_has(feature.f);
}
static __always_inline uint64_t kvm_cpu_supported_xcr0(void)
vcpu_ioctl(vcpu, KVM_GET_CPUID2, vcpu->cpuid);
}
+void vcpu_set_cpuid_property(struct kvm_vcpu *vcpu,
+ struct kvm_x86_cpu_property property,
+ uint32_t value);
+void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr);
+
+void vcpu_clear_cpuid_entry(struct kvm_vcpu *vcpu, uint32_t function);
+
static inline bool vcpu_cpuid_has(struct kvm_vcpu *vcpu,
struct kvm_x86_cpu_feature feature)
{
return *((&entry->eax) + feature.reg) & BIT(feature.bit);
}
-void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr);
-
-void vcpu_clear_cpuid_entry(struct kvm_vcpu *vcpu, uint32_t function);
void vcpu_set_or_clear_cpuid_feature(struct kvm_vcpu *vcpu,
struct kvm_x86_cpu_feature feature,
bool set);
} while (0)
void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits);
+void kvm_init_vm_address_properties(struct kvm_vm *vm);
bool vm_is_unrestricted_guest(struct kvm_vm *vm);
struct ex_regs {
* r9 = exception vector (non-zero)
* r10 = error code
*/
-#define KVM_ASM_SAFE(insn) \
+#define __KVM_ASM_SAFE(insn, fep) \
"mov $" __stringify(KVM_EXCEPTION_MAGIC) ", %%r9\n\t" \
"lea 1f(%%rip), %%r10\n\t" \
"lea 2f(%%rip), %%r11\n\t" \
- "1: " insn "\n\t" \
+ fep "1: " insn "\n\t" \
"xor %%r9, %%r9\n\t" \
"2:\n\t" \
"mov %%r9b, %[vector]\n\t" \
"mov %%r10, %[error_code]\n\t"
+#define KVM_ASM_SAFE(insn) __KVM_ASM_SAFE(insn, "")
+#define KVM_ASM_SAFE_FEP(insn) __KVM_ASM_SAFE(insn, KVM_FEP)
+
#define KVM_ASM_SAFE_OUTPUTS(v, ec) [vector] "=qm"(v), [error_code] "=rm"(ec)
#define KVM_ASM_SAFE_CLOBBERS "r9", "r10", "r11"
vector; \
})
-static inline uint8_t rdmsr_safe(uint32_t msr, uint64_t *val)
-{
- uint64_t error_code;
- uint8_t vector;
- uint32_t a, d;
+#define kvm_asm_safe_fep(insn, inputs...) \
+({ \
+ uint64_t ign_error_code; \
+ uint8_t vector; \
+ \
+ asm volatile(KVM_ASM_SAFE(insn) \
+ : KVM_ASM_SAFE_OUTPUTS(vector, ign_error_code) \
+ : inputs \
+ : KVM_ASM_SAFE_CLOBBERS); \
+ vector; \
+})
- asm volatile(KVM_ASM_SAFE("rdmsr")
- : "=a"(a), "=d"(d), KVM_ASM_SAFE_OUTPUTS(vector, error_code)
- : "c"(msr)
- : KVM_ASM_SAFE_CLOBBERS);
+#define kvm_asm_safe_ec_fep(insn, error_code, inputs...) \
+({ \
+ uint8_t vector; \
+ \
+ asm volatile(KVM_ASM_SAFE_FEP(insn) \
+ : KVM_ASM_SAFE_OUTPUTS(vector, error_code) \
+ : inputs \
+ : KVM_ASM_SAFE_CLOBBERS); \
+ vector; \
+})
- *val = (uint64_t)a | ((uint64_t)d << 32);
- return vector;
+#define BUILD_READ_U64_SAFE_HELPER(insn, _fep, _FEP) \
+static inline uint8_t insn##_safe ##_fep(uint32_t idx, uint64_t *val) \
+{ \
+ uint64_t error_code; \
+ uint8_t vector; \
+ uint32_t a, d; \
+ \
+ asm volatile(KVM_ASM_SAFE##_FEP(#insn) \
+ : "=a"(a), "=d"(d), \
+ KVM_ASM_SAFE_OUTPUTS(vector, error_code) \
+ : "c"(idx) \
+ : KVM_ASM_SAFE_CLOBBERS); \
+ \
+ *val = (uint64_t)a | ((uint64_t)d << 32); \
+ return vector; \
}
+/*
+ * Generate {insn}_safe() and {insn}_safe_fep() helpers for instructions that
+ * use ECX as in input index, and EDX:EAX as a 64-bit output.
+ */
+#define BUILD_READ_U64_SAFE_HELPERS(insn) \
+ BUILD_READ_U64_SAFE_HELPER(insn, , ) \
+ BUILD_READ_U64_SAFE_HELPER(insn, _fep, _FEP) \
+
+BUILD_READ_U64_SAFE_HELPERS(rdmsr)
+BUILD_READ_U64_SAFE_HELPERS(rdpmc)
+BUILD_READ_U64_SAFE_HELPERS(xgetbv)
+
static inline uint8_t wrmsr_safe(uint32_t msr, uint64_t val)
{
return kvm_asm_safe("wrmsr", "a"(val & -1u), "d"(val >> 32), "c"(msr));
bool kvm_is_tdp_enabled(void);
+static inline bool kvm_is_pmu_enabled(void)
+{
+ return get_kvm_param_bool("enable_pmu");
+}
+
+static inline bool kvm_is_forced_emulation_enabled(void)
+{
+ return !!get_kvm_param_integer("force_emulation_prefix");
+}
+
uint64_t *__vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr,
int *level);
uint64_t *vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr);
#define PFERR_GUEST_PAGE_MASK BIT_ULL(PFERR_GUEST_PAGE_BIT)
#define PFERR_IMPLICIT_ACCESS BIT_ULL(PFERR_IMPLICIT_ACCESS_BIT)
+bool sys_clocksource_is_based_on_tsc(void);
+
#endif /* SELFTEST_KVM_PROCESSOR_H */
projects / linux-2.6-block.git / blobdiff