2015-04-30 13:36+0200, Paolo Bonzini: > This patch adds the interface between x86.c and the emulator: the > SMBASE register, a new emulator flag, the RSM instruction. It also > adds a new request bit that will be used by the KVM_SMI ioctl. > > Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> > --- > diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c > @@ -2505,7 +2505,7 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx > *vmx) > vmx->nested.nested_vmx_misc_low &= VMX_MISC_SAVE_EFER_LMA; > vmx->nested.nested_vmx_misc_low |= > VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE | > - VMX_MISC_ACTIVITY_HLT; > + VMX_MISC_ACTIVITY_HLT | VMX_MISC_IA32_SMBASE_MSR; > vmx->nested.nested_vmx_misc_high = 0; > } > > bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) > @@ -2217,6 +2218,11 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct > msr_data *msr_info) > case MSR_IA32_MISC_ENABLE: > vcpu->arch.ia32_misc_enable_msr = data; > break; > + case MSR_IA32_SMBASE: > + if (!msr_info->host_initiated) > + return 1; > + vcpu->arch.smbase = data; > + break; > case MSR_KVM_WALL_CLOCK_NEW: > case MSR_KVM_WALL_CLOCK: > vcpu->kvm->arch.wall_clock = data; > @@ -2612,6 +2618,11 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct > msr_data *msr_info) > case MSR_IA32_MISC_ENABLE: > msr_info->data = vcpu->arch.ia32_misc_enable_msr; > break; > + case MSR_IA32_SMBASE: > + if (!msr_info->host_initiated && !is_smm(vcpu)) > + return 1; > + msr_info->data = vcpu->arch.smbase; > + break;
(I'm not sure if this is supported if IA32_VMX_BASIC[49] = 0. 34.15.6.4 Saving Guest State The SMM-transfer monitor (STM) can also discover the current value of the SMBASE register by using the RDMSR but it's not possible to get into STM without having a support for it noted in IA32_VMX_BASIC[49] and more magic we also don't emulate to actually enable it.) > @@ -7208,6 +7240,8 @@ void kvm_vcpu_reset(struct kvm_vcpu *vcpu) > vcpu->arch.regs_avail = ~0; > vcpu->arch.regs_dirty = ~0; > > + vcpu->arch.smbase = 0x30000; It's not reset on INIT, only on RESET. (34.11 SMBASE RELOCATION) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
