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| author | Paolo Bonzini <pbonzini@redhat.com> | 2022-09-29 19:20:13 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 18:31:19 +0100 |
| commit | 4b8e1b32013da2495244dbdee70f2456e6bc7aca (patch) | |
| tree | 9cea015d6077469b118b34a3a04c4fc0ede4a361 /arch/x86/kvm/smm.h | |
| parent | KVM: x86: do not go through ctxt->ops when emulating rsm (diff) | |
| download | linux-4b8e1b32013da2495244dbdee70f2456e6bc7aca.tar.xz linux-4b8e1b32013da2495244dbdee70f2456e6bc7aca.zip | |
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/smm.h')
| -rw-r--r-- | arch/x86/kvm/smm.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kvm/smm.h b/arch/x86/kvm/smm.h index b0602a92e511..0e1bd8bd6dc4 100644 --- a/arch/x86/kvm/smm.h +++ b/arch/x86/kvm/smm.h @@ -8,6 +8,7 @@ #define PUT_SMSTATE(type, buf, offset, val) \ *(type *)((buf) + (offset) - 0x7e00) = val +#ifdef CONFIG_KVM_SMM static inline int kvm_inject_smi(struct kvm_vcpu *vcpu) { kvm_make_request(KVM_REQ_SMI, vcpu); @@ -23,5 +24,16 @@ void kvm_smm_changed(struct kvm_vcpu *vcpu, bool in_smm); void enter_smm(struct kvm_vcpu *vcpu); int emulator_leave_smm(struct x86_emulate_ctxt *ctxt); void process_smi(struct kvm_vcpu *vcpu); +#else +static inline int kvm_inject_smi(struct kvm_vcpu *vcpu) { return -ENOTTY; } +static inline bool is_smm(struct kvm_vcpu *vcpu) { return false; } +static inline void enter_smm(struct kvm_vcpu *vcpu) { WARN_ON_ONCE(1); } +static inline void process_smi(struct kvm_vcpu *vcpu) { WARN_ON_ONCE(1); } + +/* + * emulator_leave_smm is used as a function pointer, so the + * stub is defined in x86.c. + */ +#endif #endif |