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Diffstat (limited to 'arch/x86/kvm/svm.c')
-rw-r--r--arch/x86/kvm/svm.c27
1 files changed, 24 insertions, 3 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 63fec1531e89..6bb15d583e47 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -135,6 +135,8 @@ struct vcpu_svm {
u32 *msrpm;
+ ulong nmi_iret_rip;
+
struct nested_state nested;
bool nmi_singlestep;
@@ -1153,8 +1155,10 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu)
wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
load_gs_index(svm->host.gs);
#else
+#ifdef CONFIG_X86_32_LAZY_GS
loadsegment(gs, svm->host.gs);
#endif
+#endif
for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
}
@@ -2653,6 +2657,7 @@ static int iret_interception(struct vcpu_svm *svm)
++svm->vcpu.stat.nmi_window_exits;
clr_intercept(svm, INTERCEPT_IRET);
svm->vcpu.arch.hflags |= HF_IRET_MASK;
+ svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
return 1;
}
@@ -3474,7 +3479,12 @@ static void svm_complete_interrupts(struct vcpu_svm *svm)
svm->int3_injected = 0;
- if (svm->vcpu.arch.hflags & HF_IRET_MASK) {
+ /*
+ * If we've made progress since setting HF_IRET_MASK, we've
+ * executed an IRET and can allow NMI injection.
+ */
+ if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
+ && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
}
@@ -3641,19 +3651,30 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
wrmsrl(MSR_GS_BASE, svm->host.gs_base);
#else
loadsegment(fs, svm->host.fs);
+#ifndef CONFIG_X86_32_LAZY_GS
+ loadsegment(gs, svm->host.gs);
+#endif
#endif
reload_tss(vcpu);
local_irq_disable();
- stgi();
-
vcpu->arch.cr2 = svm->vmcb->save.cr2;
vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
+ if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
+ kvm_before_handle_nmi(&svm->vcpu);
+
+ stgi();
+
+ /* Any pending NMI will happen here */
+
+ if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
+ kvm_after_handle_nmi(&svm->vcpu);
+
sync_cr8_to_lapic(vcpu);
svm->next_rip = 0;