Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "Just two very small & simple patches"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Use adjustment in guest cycles when handling MSR_IA32_TSC_ADJUST
  KVM: x86: zero IDT limit on entry to SMM

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5ef2560075bf..8f0f6eca69da 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2105,7 +2105,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
                 if (guest_cpuid_has_tsc_adjust(vcpu)) {
                         if (!msr_info->host_initiated) {
                                 s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr;
-                                kvm_x86_ops->adjust_tsc_offset(vcpu, adj, true);
+                                adjust_tsc_offset_guest(vcpu, adj);
                         }
                         vcpu->arch.ia32_tsc_adjust_msr = data;
                 }
@@ -6327,6 +6327,7 @@ static void process_smi_save_state_64(struct kvm_vcpu *vcpu, char *buf)
 static void process_smi(struct kvm_vcpu *vcpu)
 {
         struct kvm_segment cs, ds;
+        struct desc_ptr dt;
         char buf[512];
         u32 cr0;
 
@@ -6359,6 +6360,10 @@ static void process_smi(struct kvm_vcpu *vcpu)
 
         kvm_x86_ops->set_cr4(vcpu, 0);
 
+        /* Undocumented: IDT limit is set to zero on entry to SMM.  */
+        dt.address = dt.size = 0;
+        kvm_x86_ops->set_idt(vcpu, &dt);
+
         __kvm_set_dr(vcpu, 7, DR7_FIXED_1);
 
         cs.selector = (vcpu->arch.smbase >> 4) & 0xffff;