1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 1821c2078199..1f8510c51d6e 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -411,7 +411,6 @@ static __init int svm_hardware_setup(void)
 
         iopm_va = page_address(iopm_pages);
         memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
-        clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */
         iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
 
         if (boot_cpu_has(X86_FEATURE_NX))
@@ -796,6 +795,11 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
         var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
         var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
 
+        /* AMD's VMCB does not have an explicit unusable field, so emulate it
+         * for cross vendor migration purposes by "not present"
+         */
+        var->unusable = !var->present || (var->type == 0);
+
         switch (seg) {
         case VCPU_SREG_CS:
                 /*
@@ -827,8 +831,6 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
                         var->type |= 0x1;
                 break;
         }
-
-        var->unusable = !var->present;
 }
 
 static int svm_get_cpl(struct kvm_vcpu *vcpu)