KVM: arm/arm64: fix the incompatible matching for external abort

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@huawei.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index dcae397..3d22eb8 100644 (file)
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -233,7 +233,7 @@ 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 bf61da0..5f28dfa 100644 (file)
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -240,7 +240,7 @@ 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: