diff options
| author | Avi Kivity <avi@redhat.com> | 2009-12-07 13:16:48 +0300 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 18:35:39 +0300 |
| commit | fc78f51938e1ea866daa2045851b2e5681371668 (patch) | |
| tree | bf46fdc9daca6cab3b42d102ec12c133a62cb2ff /arch/x86/kvm/kvm_cache_regs.h | |
| parent | cdc0e24456bf5678f63497569c3676c9019f82c1 (diff) | |
| download | linux-fc78f51938e1ea866daa2045851b2e5681371668.tar.xz | |
KVM: Add accessor for reading cr4 (or some bits of cr4)
Some bits of cr4 can be owned by the guest on vmx, so when we read them,
we copy them to the vcpu structure. In preparation for making the set of
guest-owned bits dynamic, use helpers to access these bits so we don't need
to know where the bit resides.
No changes to svm since all bits are host-owned there.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/kvm_cache_regs.h')
| -rw-r--r-- | arch/x86/kvm/kvm_cache_regs.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kvm/kvm_cache_regs.h b/arch/x86/kvm/kvm_cache_regs.h index 7bcc5b6a4403..35acc36e1782 100644 --- a/arch/x86/kvm/kvm_cache_regs.h +++ b/arch/x86/kvm/kvm_cache_regs.h @@ -38,4 +38,16 @@ static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index) return vcpu->arch.pdptrs[index]; } +static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask) +{ + if (mask & 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 |