[mirror_ubuntu-hirsute-kernel.git] / arch / x86 / kvm / cpuid.h

#ifndef ARCH_X86_KVM_CPUID_H
#define ARCH_X86_KVM_CPUID_H

#include "x86.h"
#include <asm/cpu.h>
#include <asm/processor.h>

int kvm_update_cpuid(struct kvm_vcpu *vcpu);
bool kvm_mpx_supported(void);
struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
					      u32 function, u32 index);
int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
			    struct kvm_cpuid_entry2 __user *entries,
			    unsigned int type);
int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
			     struct kvm_cpuid *cpuid,
			     struct kvm_cpuid_entry __user *entries);
int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
			      struct kvm_cpuid2 *cpuid,
			      struct kvm_cpuid_entry2 __user *entries);
int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
			      struct kvm_cpuid2 *cpuid,
			      struct kvm_cpuid_entry2 __user *entries);
void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx);

int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu);

static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.maxphyaddr;
}

struct cpuid_reg {
	u32 function;
	u32 index;
	int reg;
};

static const struct cpuid_reg reverse_cpuid[] = {
	[CPUID_1_EDX]         = {         1, 0, CPUID_EDX},
	[CPUID_8000_0001_EDX] = {0x80000001, 0, CPUID_EDX},
	[CPUID_8086_0001_EDX] = {0x80860001, 0, CPUID_EDX},
	[CPUID_1_ECX]         = {         1, 0, CPUID_ECX},
	[CPUID_C000_0001_EDX] = {0xc0000001, 0, CPUID_EDX},
	[CPUID_8000_0001_ECX] = {0xc0000001, 0, CPUID_ECX},
	[CPUID_7_0_EBX]       = {         7, 0, CPUID_EBX},
	[CPUID_D_1_EAX]       = {       0xd, 1, CPUID_EAX},
	[CPUID_F_0_EDX]       = {       0xf, 0, CPUID_EDX},
	[CPUID_F_1_EDX]       = {       0xf, 1, CPUID_EDX},
	[CPUID_8000_0008_EBX] = {0x80000008, 0, CPUID_EBX},
	[CPUID_6_EAX]         = {         6, 0, CPUID_EAX},
	[CPUID_8000_000A_EDX] = {0x8000000a, 0, CPUID_EDX},
	[CPUID_7_ECX]         = {         7, 0, CPUID_ECX},
	[CPUID_8000_0007_EBX] = {0x80000007, 0, CPUID_EBX},
};

static __always_inline struct cpuid_reg x86_feature_cpuid(unsigned x86_feature)
{
	unsigned x86_leaf = x86_feature / 32;

	BUILD_BUG_ON(!__builtin_constant_p(x86_leaf));
	BUILD_BUG_ON(x86_leaf >= ARRAY_SIZE(reverse_cpuid));
	BUILD_BUG_ON(reverse_cpuid[x86_leaf].function == 0);

	return reverse_cpuid[x86_leaf];
}

static __always_inline int *guest_cpuid_get_register(struct kvm_vcpu *vcpu, unsigned x86_feature)
{
	struct kvm_cpuid_entry2 *entry;
	const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);

	entry = kvm_find_cpuid_entry(vcpu, cpuid.function, cpuid.index);
	if (!entry)
		return NULL;

	switch (cpuid.reg) {
	case CPUID_EAX:
		return &entry->eax;
	case CPUID_EBX:
		return &entry->ebx;
	case CPUID_ECX:
		return &entry->ecx;
	case CPUID_EDX:
		return &entry->edx;
	default:
		BUILD_BUG();
		return NULL;
	}
}

static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, unsigned x86_feature)
{
	int *reg;

	if (x86_feature == X86_FEATURE_XSAVE &&
			!static_cpu_has(X86_FEATURE_XSAVE))
		return false;

	reg = guest_cpuid_get_register(vcpu, x86_feature);
	if (!reg)
		return false;

	return *reg & bit(x86_feature);
}

static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, unsigned x86_feature)
{
	int *reg;

	reg = guest_cpuid_get_register(vcpu, x86_feature);
	if (reg)
		*reg &= ~bit(x86_feature);
}

static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 0, 0);
	return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
}

static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
	if (!best)
		return -1;

	return x86_family(best->eax);
}

static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
	if (!best)
		return -1;

	return x86_model(best->eax);
}

static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;

	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
	if (!best)
		return -1;

	return x86_stepping(best->eax);
}

static inline bool supports_cpuid_fault(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.msr_platform_info & MSR_PLATFORM_INFO_CPUID_FAULT;
}

static inline bool cpuid_fault_enabled(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.msr_misc_features_enables &
		  MSR_MISC_FEATURES_ENABLES_CPUID_FAULT;
}

#endif
Commit	Line	Data
00b27a3e AK	1	#ifndef ARCH_X86_KVM_CPUID_H
	2	#define ARCH_X86_KVM_CPUID_H
	3
	4	#include "x86.h"
91713faf	5	#include <asm/cpu.h>
d6321d49	6	#include <asm/processor.h>
00b27a3e	7
dd598091	8	int kvm_update_cpuid(struct kvm_vcpu *vcpu);
a87036ad	9	bool kvm_mpx_supported(void);
00b27a3e AK	10	struct kvm_cpuid_entry2 kvm_find_cpuid_entry(struct kvm_vcpu vcpu,
00b27a3e AK	11	u32 function, u32 index);
9c15bb1d BP	12	int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
	13	struct kvm_cpuid_entry2 __user *entries,
	14	unsigned int type);
00b27a3e AK	15	int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
	16	struct kvm_cpuid *cpuid,
	17	struct kvm_cpuid_entry __user *entries);
	18	int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
	19	struct kvm_cpuid2 *cpuid,
	20	struct kvm_cpuid_entry2 __user *entries);
	21	int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
	22	struct kvm_cpuid2 *cpuid,
	23	struct kvm_cpuid_entry2 __user *entries);
62046e5a	24	void kvm_cpuid(struct kvm_vcpu vcpu, u32 eax, u32 ebx, u32 ecx, u32 *edx);
00b27a3e	25
5a4f55cd EK	26	int cpuid_query_maxphyaddr(struct kvm_vcpu *vcpu);
	27
	28	static inline int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
	29	{
	30	return vcpu->arch.maxphyaddr;
	31	}
00b27a3e	32
d6321d49 RK	33	struct cpuid_reg {
	34	u32 function;
	35	u32 index;
	36	int reg;
	37	};
00b27a3e	38
d6321d49 RK	39	static const struct cpuid_reg reverse_cpuid[] = {
	40	[CPUID_1_EDX] = { 1, 0, CPUID_EDX},
	41	[CPUID_8000_0001_EDX] = {0x80000001, 0, CPUID_EDX},
	42	[CPUID_8086_0001_EDX] = {0x80860001, 0, CPUID_EDX},
	43	[CPUID_1_ECX] = { 1, 0, CPUID_ECX},
	44	[CPUID_C000_0001_EDX] = {0xc0000001, 0, CPUID_EDX},
	45	[CPUID_8000_0001_ECX] = {0xc0000001, 0, CPUID_ECX},
	46	[CPUID_7_0_EBX] = { 7, 0, CPUID_EBX},
	47	[CPUID_D_1_EAX] = { 0xd, 1, CPUID_EAX},
	48	[CPUID_F_0_EDX] = { 0xf, 0, CPUID_EDX},
	49	[CPUID_F_1_EDX] = { 0xf, 1, CPUID_EDX},
	50	[CPUID_8000_0008_EBX] = {0x80000008, 0, CPUID_EBX},
	51	[CPUID_6_EAX] = { 6, 0, CPUID_EAX},
	52	[CPUID_8000_000A_EDX] = {0x8000000a, 0, CPUID_EDX},
	53	[CPUID_7_ECX] = { 7, 0, CPUID_ECX},
	54	[CPUID_8000_0007_EBX] = {0x80000007, 0, CPUID_EBX},
	55	};
00b27a3e	56
d6321d49	57	static __always_inline struct cpuid_reg x86_feature_cpuid(unsigned x86_feature)
e24dea2a	58	{
d6321d49	59	unsigned x86_leaf = x86_feature / 32;
e24dea2a	60
d6321d49 RK	61	BUILD_BUG_ON(!__builtin_constant_p(x86_leaf));
	62	BUILD_BUG_ON(x86_leaf >= ARRAY_SIZE(reverse_cpuid));
	63	BUILD_BUG_ON(reverse_cpuid[x86_leaf].function == 0);
e24dea2a	64
d6321d49	65	return reverse_cpuid[x86_leaf];
00b27a3e AK	66	}
00b27a3e AK	67
d6321d49	68	static __always_inline int guest_cpuid_get_register(struct kvm_vcpu vcpu, unsigned x86_feature)
97ec8c06	69	{
d6321d49 RK	70	struct kvm_cpuid_entry2 *entry;
d6321d49 RK	71	const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
660a5d51	72
d6321d49 RK	73	entry = kvm_find_cpuid_entry(vcpu, cpuid.function, cpuid.index);
	74	if (!entry)
	75	return NULL;
2b036c6b	76
d6321d49 RK	77	switch (cpuid.reg) {
	78	case CPUID_EAX:
	79	return &entry->eax;
	80	case CPUID_EBX:
	81	return &entry->ebx;
	82	case CPUID_ECX:
	83	return &entry->ecx;
	84	case CPUID_EDX:
	85	return &entry->edx;
	86	default:
	87	BUILD_BUG();
	88	return NULL;
	89	}
2b036c6b BO	90	}
2b036c6b BO	91
d6321d49	92	static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, unsigned x86_feature)
ad756a16	93	{
d6321d49	94	int *reg;
ad756a16	95
d6321d49 RK	96	if (x86_feature == X86_FEATURE_XSAVE &&
	97	!static_cpu_has(X86_FEATURE_XSAVE))
	98	return false;
ad756a16	99
d6321d49 RK	100	reg = guest_cpuid_get_register(vcpu, x86_feature);
	101	if (!reg)
	102	return false;
58cb628d	103
d6321d49	104	return *reg & bit(x86_feature);
58cb628d JK	105	}
58cb628d JK	106
1b4d56b8 RK	107	static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, unsigned x86_feature)
	108	{
	109	int *reg;
	110
	111	reg = guest_cpuid_get_register(vcpu, x86_feature);
	112	if (reg)
	113	*reg &= ~bit(x86_feature);
	114	}
	115
a0c0feb5 PB	116	static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
	117	{
	118	struct kvm_cpuid_entry2 *best;
	119
	120	best = kvm_find_cpuid_entry(vcpu, 0, 0);
	121	return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
	122	}
	123
91713faf BP	124	static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
	125	{
	126	struct kvm_cpuid_entry2 *best;
	127
	128	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
	129	if (!best)
	130	return -1;
	131
	132	return x86_family(best->eax);
	133	}
	134
	135	static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
	136	{
	137	struct kvm_cpuid_entry2 *best;
	138
	139	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
	140	if (!best)
	141	return -1;
	142
	143	return x86_model(best->eax);
	144	}
	145
	146	static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
	147	{
	148	struct kvm_cpuid_entry2 *best;
	149
	150	best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
	151	if (!best)
	152	return -1;
	153
	154	return x86_stepping(best->eax);
	155	}
	156
db2336a8 KH	157	static inline bool supports_cpuid_fault(struct kvm_vcpu *vcpu)
	158	{
	159	return vcpu->arch.msr_platform_info & MSR_PLATFORM_INFO_CPUID_FAULT;
	160	}
	161
	162	static inline bool cpuid_fault_enabled(struct kvm_vcpu *vcpu)
	163	{
	164	return vcpu->arch.msr_misc_features_enables &
	165	MSR_MISC_FEATURES_ENABLES_CPUID_FAULT;
	166	}
	167
00b27a3e	168	#endif