mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
8ae0991276
'mask' is always a constant, so we can check whether it includes a bit that might be owned by the guest very cheaply, and avoid the decache call. Saves a few hundred bytes of module text. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
#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_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)
|
|
{
|
|
if (!test_bit(VCPU_EXREG_PDPTR,
|
|
(unsigned long *)&vcpu->arch.regs_avail))
|
|
kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
|
|
|
|
return vcpu->arch.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_cr4(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_read_cr4_bits(vcpu, ~0UL);
|
|
}
|
|
|
|
#endif
|