Merge tag 'xfs-4.12-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

[karo-tx-linux.git] / arch / x86 / kvm / svm.c

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 183ddb235fb48658028433d451db75d554152c54..ba9891ac5c568f1798555bfa9dcbc421fff5ae2a 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1807,7 +1807,7 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
         * 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);
+       var->unusable = !var->present;
 
        switch (seg) {
        case VCPU_SREG_TR:
@@ -1840,6 +1840,7 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
                 */
                if (var->unusable)
                        var->db = 0;
+               /* This is symmetric with svm_set_segment() */
                var->dpl = to_svm(vcpu)->vmcb->save.cpl;
                break;
        }
@@ -1980,18 +1981,14 @@ static void svm_set_segment(struct kvm_vcpu *vcpu,
        s->base = var->base;
        s->limit = var->limit;
        s->selector = var->selector;
-       if (var->unusable)
-               s->attrib = 0;
-       else {
-               s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
-               s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
-               s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
-               s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
-               s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
-               s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
-               s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
-               s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
-       }
+       s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
+       s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
+       s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
+       s->attrib |= ((var->present & 1) && !var->unusable) << SVM_SELECTOR_P_SHIFT;
+       s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
+       s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
+       s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
+       s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
 
        /*
         * This is always accurate, except if SYSRET returned to a segment
@@ -2000,7 +1997,8 @@ static void svm_set_segment(struct kvm_vcpu *vcpu,
         * would entail passing the CPL to userspace and back.
         */
        if (seg == VCPU_SREG_SS)
-               svm->vmcb->save.cpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
+               /* This is symmetric with svm_get_segment() */
+               svm->vmcb->save.cpl = (var->dpl & 3);
 
        mark_dirty(svm->vmcb, VMCB_SEG);
 }