KVM: MMU: Don't track nested fault info in error-code

This patch moves the detection whether a page-fault was
nested or not out of the error code and moves it into a
separate variable in the fault struct.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

3 files changed, 5 insertions, 11 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 80224bf5d4f8..519d6f784984 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -322,6 +322,7 @@ struct kvm_vcpu_arch {
         struct {
                 u64      address;
                 unsigned error_code;
+                bool     nested;
         } fault;
 
         /* only needed in kvm_pv_mmu_op() path, but it's hot so
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 513abbb5ff46..7086ca85d3e7 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -47,7 +47,6 @@
 #define PFERR_USER_MASK (1U << 2)
 #define PFERR_RSVD_MASK (1U << 3)
 #define PFERR_FETCH_MASK (1U << 4)
-#define PFERR_NESTED_MASK (1U << 31)
 
 int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]);
 int kvm_init_shadow_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *context);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a465bd29f381..a51635ee85ec 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -342,18 +342,12 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu)
 
 void kvm_propagate_fault(struct kvm_vcpu *vcpu)
 {
-        u32 nested, error;
-
-        error   = vcpu->arch.fault.error_code;
-        nested  = error &  PFERR_NESTED_MASK;
-        error   = error & ~PFERR_NESTED_MASK;
-
-        vcpu->arch.fault.error_code = error;
-
-        if (mmu_is_nested(vcpu) && !nested)
+        if (mmu_is_nested(vcpu) && !vcpu->arch.fault.nested)
                 vcpu->arch.nested_mmu.inject_page_fault(vcpu);
         else
                 vcpu->arch.mmu.inject_page_fault(vcpu);
+
+        vcpu->arch.fault.nested = false;
 }
 
 void kvm_inject_nmi(struct kvm_vcpu *vcpu)
@@ -3524,7 +3518,7 @@ static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
         access |= PFERR_USER_MASK;
         t_gpa  = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &error);
         if (t_gpa == UNMAPPED_GVA)
-                vcpu->arch.fault.error_code |= PFERR_NESTED_MASK;
+                vcpu->arch.fault.nested = true;
 
         return t_gpa;
 }