[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

#include <linux/kvm_host.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, (enum kvm_reg)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;

	if (vcpu->arch.load_eoi_exitmap_pending) {
		vcpu->arch.load_eoi_exitmap_pending = false;
		kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu);
	}
}

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
8ba2e525 SC	5	#include <linux/kvm_host.h>
8ba2e525 SC	6
8ae09912 AK	7	#define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
	8	#define KVM_POSSIBLE_CR4_GUEST_BITS \
	9	(X86_CR4_PVI \| X86_CR4_DE \| X86_CR4_PCE \| X86_CR4_OSFXSR \
fd8cb433	10	\| X86_CR4_OSXMMEXCPT \| X86_CR4_LA57 \| X86_CR4_PGE)
8ae09912	11
5fdbf976 MT	12	static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
	13	enum kvm_reg reg)
	14	{
	15	if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
	16	kvm_x86_ops->cache_reg(vcpu, reg);
	17
	18	return vcpu->arch.regs[reg];
	19	}
	20
	21	static inline void kvm_register_write(struct kvm_vcpu *vcpu,
	22	enum kvm_reg reg,
	23	unsigned long val)
	24	{
	25	vcpu->arch.regs[reg] = val;
	26	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
	27	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
	28	}
	29
	30	static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
	31	{
	32	return kvm_register_read(vcpu, VCPU_REGS_RIP);
	33	}
	34
	35	static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
	36	{
	37	kvm_register_write(vcpu, VCPU_REGS_RIP, val);
	38	}
	39
6de4f3ad AK	40	static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
6de4f3ad AK	41	{
08acfa18 AK	42	might_sleep(); /* on svm */
08acfa18 AK	43
6de4f3ad AK	44	if (!test_bit(VCPU_EXREG_PDPTR,
6de4f3ad AK	45	(unsigned long *)&vcpu->arch.regs_avail))
1df372f4	46	kvm_x86_ops->cache_reg(vcpu, (enum kvm_reg)VCPU_EXREG_PDPTR);
6de4f3ad	47
ff03a073	48	return vcpu->arch.walk_mmu->pdptrs[index];
6de4f3ad AK	49	}
6de4f3ad AK	50
4d4ec087 AK	51	static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
4d4ec087 AK	52	{
8ae09912 AK	53	ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
8ae09912 AK	54	if (tmask & vcpu->arch.cr0_guest_owned_bits)
e8467fda	55	kvm_x86_ops->decache_cr0_guest_bits(vcpu);
4d4ec087 AK	56	return vcpu->arch.cr0 & mask;
	57	}
	58
	59	static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
	60	{
	61	return kvm_read_cr0_bits(vcpu, ~0UL);
	62	}
	63
fc78f519 AK	64	static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
fc78f519 AK	65	{
8ae09912 AK	66	ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
8ae09912 AK	67	if (tmask & vcpu->arch.cr4_guest_owned_bits)
fc78f519 AK	68	kvm_x86_ops->decache_cr4_guest_bits(vcpu);
	69	return vcpu->arch.cr4 & mask;
	70	}
	71
9f8fe504 AK	72	static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
9f8fe504 AK	73	{
aff48baa AK	74	if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
aff48baa AK	75	kvm_x86_ops->decache_cr3(vcpu);
9f8fe504 AK	76	return vcpu->arch.cr3;
	77	}
	78
fc78f519 AK	79	static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
	80	{
	81	return kvm_read_cr4_bits(vcpu, ~0UL);
	82	}
	83
2acf923e DC	84	static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
	85	{
	86	return (kvm_register_read(vcpu, VCPU_REGS_RAX) & -1u)
	87	\| ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32);
	88	}
	89
ec9e60b2 JR	90	static inline void enter_guest_mode(struct kvm_vcpu *vcpu)
	91	{
	92	vcpu->arch.hflags \|= HF_GUEST_MASK;
	93	}
	94
	95	static inline void leave_guest_mode(struct kvm_vcpu *vcpu)
	96	{
	97	vcpu->arch.hflags &= ~HF_GUEST_MASK;
e40ff1d6 LA	98
	99	if (vcpu->arch.load_eoi_exitmap_pending) {
	100	vcpu->arch.load_eoi_exitmap_pending = false;
	101	kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu);
	102	}
ec9e60b2 JR	103	}
	104
	105	static inline bool is_guest_mode(struct kvm_vcpu *vcpu)
	106	{
	107	return vcpu->arch.hflags & HF_GUEST_MASK;
	108	}
	109
f077825a PB	110	static inline bool is_smm(struct kvm_vcpu *vcpu)
	111	{
	112	return vcpu->arch.hflags & HF_SMM_MASK;
	113	}
	114
5fdbf976	115	#endif