KVM: x86: introduce ISA specific SMM entry/exit callbacks
Entering and exiting SMM may require ISA specific handling under certain
circumstances. This commit adds two new callbacks with empty implementations.
Actual functionality will be added in following commits.
* pre_enter_smm() is to be called when injecting an SMM, before any
SMM related vcpu state has been changed
* pre_leave_smm() is to be called when emulating the RSM instruction,
when the vcpu is in real mode and before any SMM related vcpu state
has been restored
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index c9214e3..1305bb6 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -11916,6 +11916,18 @@ static void vmx_setup_mce(struct kvm_vcpu *vcpu)
~FEATURE_CONTROL_LMCE;
}
+static int vmx_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
+{
+ /* TODO: Implement */
+ return 0;
+}
+
+static int vmx_pre_leave_smm(struct kvm_vcpu *vcpu, u64 smbase)
+{
+ /* TODO: Implement */
+ return 0;
+}
+
static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.cpu_has_kvm_support = cpu_has_kvm_support,
.disabled_by_bios = vmx_disabled_by_bios,
@@ -12041,6 +12053,9 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
#endif
.setup_mce = vmx_setup_mce,
+
+ .pre_enter_smm = vmx_pre_enter_smm,
+ .pre_leave_smm = vmx_pre_leave_smm,
};
static int __init vmx_init(void)