From 462689b37f082d06c2cf32a6e4e142182825dd70 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 30 Nov 2022 23:09:19 +0000 Subject: [PATCH] KVM: VMX: Use current CPU's info to perform "disabled by BIOS?" checks 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 Signed-off-by: Sean Christopherson Reviewed-by: Kai Huang Message-Id: <20221130230934.1014142-36-seanjc@google.com> Signed-off-by: Paolo Bonzini --- 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 58eb4dbf64a3..a3c681336a39 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -2523,8 +2523,8 @@ 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)