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| author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2015-06-15 16:55:35 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-06-19 17:16:29 +0200 |
| commit | 6a39bbc5da27c3b2520876b71e4f7b50f5313503 (patch) | |
| tree | d8e388b532c3dc805e9999f70fef4aa7034d6a9b /arch/x86/kvm/x86.h | |
| parent | fa61213746a706dd975661151c35795ca4dd82c2 (diff) | |
| download | linux-6a39bbc5da27c3b2520876b71e4f7b50f5313503.tar.gz linux-6a39bbc5da27c3b2520876b71e4f7b50f5313503.tar.bz2 linux-6a39bbc5da27c3b2520876b71e4f7b50f5313503.zip | |
KVM: MTRR: do not map huge page for non-consistent range
Based on Intel's SDM, mapping huge page which do not have consistent
memory cache for each 4k page will cause undefined behavior
In order to avoiding this kind of undefined behavior, we force to use
4k pages under this case
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.h')
| -rw-r--r-- | arch/x86/kvm/x86.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 0e4727c49279..edc8cdcd786b 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -167,6 +167,8 @@ u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data); int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data); int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); +bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn, + int page_num); #define KVM_SUPPORTED_XCR0 (XSTATE_FP | XSTATE_SSE | XSTATE_YMM \ | XSTATE_BNDREGS | XSTATE_BNDCSR \ |