diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-03-02 15:56:46 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-16 17:58:27 +0100 |
| commit | c10398b6d0ddb9c8234890828ab83341e11f9840 (patch) | |
| tree | 78d16352b782e1d27a79c4587788896136abf50c /arch/x86/kvm/x86.c | |
| parent | 8721f5b061eb18c4bb3b77be3ec1c2811ca574ba (diff) | |
KVM: x86: Use KVM cpu caps to mark CR4.LA57 as not-reserved
Add accessor(s) for KVM cpu caps and use said accessor to detect
hardware support for LA57 instead of manually querying CPUID.
Note, the explicit conversion to bool via '!!' in kvm_cpu_cap_has() is
technically unnecessary, but it gives people a warm fuzzy feeling.
No functional change intended.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 849957f3afb2..389bc80f684c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -925,7 +925,7 @@ static u64 kvm_host_cr4_reserved_bits(struct cpuinfo_x86 *c) { u64 reserved_bits = __cr4_reserved_bits(cpu_has, c); - if (cpuid_ecx(0x7) & feature_bit(LA57)) + if (kvm_cpu_cap_has(X86_FEATURE_LA57)) reserved_bits &= ~X86_CR4_LA57; if (kvm_x86_ops->umip_emulated()) |