path: root/tools/testing/selftests/kvm/include/x86_64/processor.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * tools/testing/selftests/kvm/include/x86_64/processor.h
 *
 * Copyright (C) 2018, Google LLC.
 */

#ifndef SELFTEST_KVM_PROCESSOR_H
#define SELFTEST_KVM_PROCESSOR_H

#include <assert.h>
#include <stdint.h>
#include <syscall.h>

#include <asm/msr-index.h>
#include <asm/prctl.h>

#include <linux/kvm_para.h>
#include <linux/stringify.h>

#include "kvm_util.h"
#include "ucall_common.h"

extern bool host_cpu_is_intel;
extern bool host_cpu_is_amd;

/* 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_CR4_VME		(1ul << 0)
#define X86_CR4_PVI		(1ul << 1)
#define X86_CR4_TSD		(1ul << 2)
#define X86_CR4_DE		(1ul << 3)
#define X86_CR4_PSE		(1ul << 4)
#define X86_CR4_PAE		(1ul << 5)
#define X86_CR4_MCE		(1ul << 6)
#define X86_CR4_PGE		(1ul << 7)
#define X86_CR4_PCE		(1ul << 8)
#define X86_CR4_OSFXSR		(1ul << 9)
#define X86_CR4_OSXMMEXCPT	(1ul << 10)
#define X86_CR4_UMIP		(1ul << 11)
#define X86_CR4_LA57		(1ul << 12)
#define X86_CR4_VMXE		(1ul << 13)
#define X86_CR4_SMXE		(1ul << 14)
#define X86_CR4_FSGSBASE	(1ul << 16)
#define X86_CR4_PCIDE		(1ul << 17)
#define X86_CR4_OSXSAVE		(1ul << 18)
#define X86_CR4_SMEP		(1ul << 20)
#define X86_CR4_SMAP		(1ul << 21)
#define X86_CR4_PKE		(1ul << 22)

struct xstate_header {
	u64				xstate_bv;
	u64				xcomp_bv;
	u64				reserved[6];
} __attribute__((packed));

struct xstate {
	u8				i387[512];
	struct xstate_header		header;
	u8				extended_state_area[0];
} __attribute__ ((packed, aligned (64)));

#define XFEATURE_MASK_FP		BIT_ULL(0)
#define XFEATURE_MASK_SSE		BIT_ULL(1)
#define XFEATURE_MASK_YMM		BIT_ULL(2)
#define XFEATURE_MASK_BNDREGS		BIT_ULL(3)
#define XFEATURE_MASK_BNDCSR		BIT_ULL(4)
#define XFEATURE_MASK_OPMASK		BIT_ULL(5)
#define XFEATURE_MASK_ZMM_Hi256		BIT_ULL(6)
#define XFEATURE_MASK_Hi16_ZMM		BIT_ULL(7)
#define XFEATURE_MASK_PT		BIT_ULL(8)
#define XFEATURE_MASK_PKRU		BIT_ULL(9)
#define XFEATURE_MASK_PASID		BIT_ULL(10)
#define XFEATURE_MASK_CET_USER		BIT_ULL(11)
#define XFEATURE_MASK_CET_KERNEL	BIT_ULL(12)
#define XFEATURE_MASK_LBR		BIT_ULL(15)
#define XFEATURE_MASK_XTILE_CFG		BIT_ULL(17)
#define XFEATURE_MASK_XTILE_DATA	BIT_ULL(18)

#define XFEATURE_MASK_AVX512		(XFEATURE_MASK_OPMASK | \
					 XFEATURE_MASK_ZMM_Hi256 | \
					 XFEATURE_MASK_Hi16_ZMM)
#define XFEATURE_MASK_XTILE		(XFEATURE_MASK_XTILE_DATA | \
					 XFEATURE_MASK_XTILE_CFG)

/* Note, these are ordered alphabetically to match kvm_cpuid_entry2.  Eww. */
enum cpuid_output_regs {
	KVM_CPUID_EAX,
	KVM_CPUID_EBX,
	KVM_CPUID_ECX,
	KVM_CPUID_EDX
};

/*
 * Pack the information into a 64-bit value so that each X86_FEATURE_XXX can be
 * passed by value with no overhead.
 */
struct kvm_x86_cpu_feature {
	u32	function;
	u16	index;
	u8	reg;
	u8	bit;
};
#define	KVM_X86_CPU_FEATURE(fn, idx, gpr, __bit)				\
({										\
	struct kvm_x86_cpu_feature feature = {					\
		.function = fn,							\
		.index = idx,							\
		.reg = KVM_CPUID_##gpr,						\
		.bit = __bit,							\
	};									\
										\
	kvm_static_assert((fn & 0xc0000000) == 0 ||				\
			  (fn & 0xc0000000) == 0x40000000 ||			\
			  (fn & 0xc0000000) == 0x80000000 ||			\
			  (fn & 0xc0000000) == 0xc0000000);			\
	kvm_static_assert(idx < BIT(sizeof(feature.index) * BITS_PER_BYTE));	\
	feature;								\
})

/*
 * Basic Leafs, a.k.a. Intel defined
 *