diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-03-03 00:56:24 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-16 17:58:10 +0100 |
| commit | 7f5581f592984901620d34aa86a730092ae65092 (patch) | |
| tree | 28987ddd60947b39ac8a7ee493850e2ac90ad6e9 /arch/x86/kvm/cpuid.c | |
| parent | KVM: x86: Calculate the supported xcr0 mask at load time (diff) | |
| download | linux-7f5581f592984901620d34aa86a730092ae65092.tar.xz linux-7f5581f592984901620d34aa86a730092ae65092.zip | |
KVM: x86: Use supported_xcr0 to detect MPX support
Query supported_xcr0 when checking for MPX support instead of invoking
->mpx_supported() and drop ->mpx_supported() as kvm_mpx_supported() was
its last user. Rename vmx_mpx_supported() to cpu_has_vmx_mpx() to
better align with VMX/VMCS nomenclature.
Modify VMX's adjustment of xcr0 to call cpus_has_vmx_mpx() (renamed from
vmx_mpx_supported()) directly to avoid reading supported_xcr0 before
it's fully configured.
No functional change intended.
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
[Test that *all* bits are set. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 1eb775c33c4e..7f3f1a683853 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -47,8 +47,8 @@ static u32 xstate_required_size(u64 xstate_bv, bool compacted) bool kvm_mpx_supported(void) { - return ((host_xcr0 & (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR)) - && kvm_x86_ops->mpx_supported()); + return (supported_xcr0 & (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR)) + == (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR); } EXPORT_SYMBOL_GPL(kvm_mpx_supported); |