diff options
| author | Binbin Wu <binbin.wu@linux.intel.com> | 2023-09-13 20:42:24 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-11-28 17:54:09 -0800 |
| commit | 183bdd161c2b773a62f01d1c030f5a3a5b7c33b5 (patch) | |
| tree | 7dd91a109e258ba29e2d57e889e7edea8860eee2 /arch/x86/kvm/mmu.h | |
| parent | 703d794cb8cb28c07b22c1c845f5c4d4c419aff7 (diff) | |
KVM: x86: Use KVM-governed feature framework to track "LAM enabled"
Use the governed feature framework to track if Linear Address Masking (LAM)
is "enabled", i.e. if LAM can be used by the guest.
Using the framework to avoid the relative expensive call guest_cpuid_has()
during cr3 and vmexit handling paths for LAM.
No functional change intended.
Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Tested-by: Xuelian Guo <xuelian.guo@intel.com>
Link: https://lore.kernel.org/r/20230913124227.12574-14-binbin.wu@linux.intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/mmu.h')
| -rw-r--r-- | arch/x86/kvm/mmu.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 580e2414b88c..60f21bb4c27b 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -148,8 +148,7 @@ static inline unsigned long kvm_get_active_pcid(struct kvm_vcpu *vcpu) static inline unsigned long kvm_get_active_cr3_lam_bits(struct kvm_vcpu *vcpu) { - if (!kvm_cpu_cap_has(X86_FEATURE_LAM) || - !guest_cpuid_has(vcpu, X86_FEATURE_LAM)) + if (!guest_can_use(vcpu, X86_FEATURE_LAM)) return 0; return kvm_read_cr3(vcpu) & (X86_CR3_LAM_U48 | X86_CR3_LAM_U57); |