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/* 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 | X86_CR4_TSD)
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
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