[PATCH v4] KVM: arm/arm64: fix the incompatible matching for external abort

[Dongjiu Geng]

kvm_vcpu_dabt_isextabt() tries to match a full fault syndrome, but
calls kvm_vcpu_trap_get_fault_type() that only returns the fault class,
thus reducing the scope of the check. This doesn't cause any observable
bug yet as we end-up matching a closely related syndrome for which we
return the same value.

Using kvm_vcpu_trap_get_fault() instead fixes it for good.

Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
 arch/arm/include/asm/kvm_emulate.h   | 2 +-
 arch/arm64/include/asm/kvm_emulate.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index 98089ff..7571b4e 100644
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -203,7 +203,7 @@ static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
 
 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
 {
-	switch (kvm_vcpu_trap_get_fault_type(vcpu)) {
+	switch (kvm_vcpu_trap_get_fault(vcpu)) {
 	case FSC_SEA:
 	case FSC_SEA_TTW0:
 	case FSC_SEA_TTW1:
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index e5df3fc..8c918c5 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -237,7 +237,7 @@ static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
 
 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
 {
-	switch (kvm_vcpu_trap_get_fault_type(vcpu)) {
+	switch (kvm_vcpu_trap_get_fault(vcpu)) {
 	case FSC_SEA:
 	case FSC_SEA_TTW0:
 	case FSC_SEA_TTW1:
-- 
1.9.1