[PATCH v2 35/50] KVM: VMX: Use current CPU's info to perform "disabled by BIOS?" checks

[Sean Christopherson]

Use this_cpu_has() instead of boot_cpu_has() to perform the effective
"disabled by BIOS?" checks for VMX.  This will allow consolidating code
between vmx_disabled_by_bios() and vmx_check_processor_compat().

Checking the boot CPU isn't a strict requirement as any divergence in VMX
enabling between the boot CPU and other CPUs will result in KVM refusing
to load thanks to the aforementioned vmx_check_processor_compat().

Furthermore, using the boot CPU was an unintentional change introduced by
commit a4d0b2fdbcf7 ("KVM: VMX: Use VMX feature flag to query BIOS
enabling").  Prior to using the feature flags, KVM checked the raw MSR
value from the current CPU.

Reported-by: Kai Huang <kai.huang@xxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
 arch/x86/kvm/vmx/vmx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index e859d2b7daa4..3f7d9f88b314 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2492,8 +2492,8 @@ static __init int cpu_has_kvm_support(void)
 
 static __init int vmx_disabled_by_bios(void)
 {
-	return !boot_cpu_has(X86_FEATURE_MSR_IA32_FEAT_CTL) ||
-	       !boot_cpu_has(X86_FEATURE_VMX);
+	return !this_cpu_has(X86_FEATURE_MSR_IA32_FEAT_CTL) ||
+	       !this_cpu_has(X86_FEATURE_VMX);
 }
 
 static int kvm_cpu_vmxon(u64 vmxon_pointer)
-- 
2.38.1.584.g0f3c55d4c2-goog