diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2022-09-29 13:20:13 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 12:31:19 -0500 |
| commit | 4b8e1b32013da2495244dbdee70f2456e6bc7aca (patch) | |
| tree | 9cea015d6077469b118b34a3a04c4fc0ede4a361 /arch/x86/kvm/vmx | |
| parent | 1d0da94cdafe38b2c501a8d55f981204e588e259 (diff) | |
| download | linux-4b8e1b32013da2495244dbdee70f2456e6bc7aca.tar.bz2 | |
KVM: allow compiling out SMM support
Some users of KVM implement the UEFI variable store through a paravirtual device
that does not require the "SMM lockbox" component of edk2; allow them to
compile out system management mode, which is not a full implementation
especially in how it interacts with nested virtualization.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20220929172016.319443-6-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 49065614a3db..6a0b65815206 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -6842,6 +6842,8 @@ static bool vmx_has_emulated_msr(struct kvm *kvm, u32 index) { switch (index) { case MSR_IA32_SMBASE: + if (!IS_ENABLED(CONFIG_KVM_SMM)) + return false; /* * We cannot do SMM unless we can run the guest in big * real mode. |