Drop the globally visible PFERR_NESTED_GUEST_PAGE and replace it with a
more appropriately named is_write_to_guest_page_table(). The macro name
is misleading, because while all nNPT walks match PAGE|WRITE|PRESENT, the
reverse is not true.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 4 ----
arch/x86/kvm/mmu/mmu.c | 9 ++++++++-
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 1811a42fa093..62d19403d63c 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -280,10 +280,6 @@ enum x86_intercept_stage;
#define PFERR_PRIVATE_ACCESS BIT_ULL(49)
#define PFERR_SYNTHETIC_MASK (PFERR_IMPLICIT_ACCESS | PFERR_PRIVATE_ACCESS)
-#define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK | \
- PFERR_WRITE_MASK | \
- PFERR_PRESENT_MASK)
-
/* apic attention bits */
#define KVM_APIC_CHECK_VAPIC 0
/*
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index d25c2b395116..4ca01256143e 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5947,6 +5947,13 @@ void kvm_mmu_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
write_unlock(&vcpu->kvm->mmu_lock);
}
+static bool is_write_to_guest_page_table(u64 error_code)
+{
+ const u64 mask = PFERR_GUEST_PAGE_MASK | PFERR_WRITE_MASK | PFERR_PRESENT_MASK;
+
+ return (error_code & mask) == mask;
+}
+
int noinline kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
void *insn, int insn_len)
{
@@ -6010,7 +6017,7 @@ int noinline kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 err
* and resume the guest.
*/
if (vcpu->arch.mmu->root_role.direct &&
- (error_code & PFERR_NESTED_GUEST_PAGE) == PFERR_NESTED_GUEST_PAGE) {
+ is_write_to_guest_page_table(error_code)) {
kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(cr2_or_gpa));
return 1;
}
--
2.46.0.469.g59c65b2a67-goog
