[linux-2.6-block.git] / arch / x86 / kvm / kvm_cache_regs.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ASM_KVM_CACHE_REGS_H
#define ASM_KVM_CACHE_REGS_H

#define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
#define KVM_POSSIBLE_CR4_GUEST_BITS				  \
	(X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR  \
	 | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_PGE)

static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
					      enum kvm_reg reg)
{
	if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
		kvm_x86_ops->cache_reg(vcpu, reg);

	return vcpu->arch.regs[reg];
}

static inline void kvm_register_write(struct kvm_vcpu *vcpu,
				      enum kvm_reg reg,
				      unsigned long val)
{
	vcpu->arch.regs[reg] = val;
	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
}

static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
{
	return kvm_register_read(vcpu, VCPU_REGS_RIP);
}

static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
{
	kvm_register_write(vcpu, VCPU_REGS_RIP, val);
}

static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
{
	might_sleep();  /* on svm */

	if (!test_bit(VCPU_EXREG_PDPTR,
		      (unsigned long *)&vcpu->arch.regs_avail))
		kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);

	return vcpu->arch.walk_mmu->pdptrs[index];
}

static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
{
	ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
	if (tmask & vcpu->arch.cr0_guest_owned_bits)
		kvm_x86_ops->decache_cr0_guest_bits(vcpu);
	return vcpu->arch.cr0 & mask;
}

static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
{
	return kvm_read_cr0_bits(vcpu, ~0UL);
}

static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
{
	ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
	if (tmask & vcpu->arch.cr4_guest_owned_bits)
		kvm_x86_ops->decache_cr4_guest_bits(vcpu);
	return vcpu->arch.cr4 & mask;
}

static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
{
	if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
		kvm_x86_ops->decache_cr3(vcpu);
	return vcpu->arch.cr3;
}

static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
{
	return kvm_read_cr4_bits(vcpu, ~0UL);
}

static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
{
	return (kvm_register_read(vcpu, VCPU_REGS_RAX) & -1u)
		| ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32);
}

static inline void enter_guest_mode(struct kvm_vcpu *vcpu)
{
	vcpu->arch.hflags |= HF_GUEST_MASK;
}

static inline void leave_guest_mode(struct kvm_vcpu *vcpu)
{
	vcpu->arch.hflags &= ~HF_GUEST_MASK;
}

static inline bool is_guest_mode(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.hflags & HF_GUEST_MASK;
}

static inline bool is_smm(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.hflags & HF_SMM_MASK;
}

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
5fdbf976 MT	2	#ifndef ASM_KVM_CACHE_REGS_H
	3	#define ASM_KVM_CACHE_REGS_H
	4
8ae09912 AK	5	#define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
	6	#define KVM_POSSIBLE_CR4_GUEST_BITS \
	7	(X86_CR4_PVI \| X86_CR4_DE \| X86_CR4_PCE \| X86_CR4_OSFXSR \
fd8cb433	8	\| X86_CR4_OSXMMEXCPT \| X86_CR4_LA57 \| X86_CR4_PGE)
8ae09912	9
5fdbf976 MT	10	static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
	11	enum kvm_reg reg)
	12	{
	13	if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
	14	kvm_x86_ops->cache_reg(vcpu, reg);
	15
	16	return vcpu->arch.regs[reg];
	17	}
	18
	19	static inline void kvm_register_write(struct kvm_vcpu *vcpu,
	20	enum kvm_reg reg,
	21	unsigned long val)
	22	{
	23	vcpu->arch.regs[reg] = val;
	24	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
	25	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
	26	}
	27
	28	static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
	29	{
	30	return kvm_register_read(vcpu, VCPU_REGS_RIP);
	31	}
	32
	33	static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
	34	{
	35	kvm_register_write(vcpu, VCPU_REGS_RIP, val);
	36	}
	37
6de4f3ad AK	38	static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
6de4f3ad AK	39	{
08acfa18 AK	40	might_sleep(); /* on svm */
08acfa18 AK	41
6de4f3ad AK	42	if (!test_bit(VCPU_EXREG_PDPTR,
	43	(unsigned long *)&vcpu->arch.regs_avail))
	44	kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
	45
ff03a073	46	return vcpu->arch.walk_mmu->pdptrs[index];
6de4f3ad AK	47	}
6de4f3ad AK	48
4d4ec087 AK	49	static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
4d4ec087 AK	50	{
8ae09912 AK	51	ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
8ae09912 AK	52	if (tmask & vcpu->arch.cr0_guest_owned_bits)
e8467fda	53	kvm_x86_ops->decache_cr0_guest_bits(vcpu);
4d4ec087 AK	54	return vcpu->arch.cr0 & mask;
	55	}
	56
	57	static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
	58	{
	59	return kvm_read_cr0_bits(vcpu, ~0UL);
	60	}
	61
fc78f519 AK	62	static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
fc78f519 AK	63	{
8ae09912 AK	64	ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
8ae09912 AK	65	if (tmask & vcpu->arch.cr4_guest_owned_bits)
fc78f519 AK	66	kvm_x86_ops->decache_cr4_guest_bits(vcpu);
	67	return vcpu->arch.cr4 & mask;
	68	}
	69
9f8fe504 AK	70	static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
9f8fe504 AK	71	{
aff48baa AK	72	if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
aff48baa AK	73	kvm_x86_ops->decache_cr3(vcpu);
9f8fe504 AK	74	return vcpu->arch.cr3;
	75	}
	76
fc78f519 AK	77	static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
	78	{
	79	return kvm_read_cr4_bits(vcpu, ~0UL);
	80	}
	81
2acf923e DC	82	static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
	83	{
	84	return (kvm_register_read(vcpu, VCPU_REGS_RAX) & -1u)
	85	\| ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32);
	86	}
	87
ec9e60b2 JR	88	static inline void enter_guest_mode(struct kvm_vcpu *vcpu)
	89	{
	90	vcpu->arch.hflags \|= HF_GUEST_MASK;
	91	}
	92
	93	static inline void leave_guest_mode(struct kvm_vcpu *vcpu)
	94	{
	95	vcpu->arch.hflags &= ~HF_GUEST_MASK;
	96	}
	97
	98	static inline bool is_guest_mode(struct kvm_vcpu *vcpu)
	99	{
	100	return vcpu->arch.hflags & HF_GUEST_MASK;
	101	}
	102
f077825a PB	103	static inline bool is_smm(struct kvm_vcpu *vcpu)
	104	{
	105	return vcpu->arch.hflags & HF_SMM_MASK;
	106	}
	107
5fdbf976	108	#endif