KVM's inject_abt64() injects an external-abort into an aarch64 guest.
The KVM_CAP_ARM_INJECT_EXT_DABT is intended to do exactly this, but
for an aarch32 guest inject_abt32() injects an implementation-defined
exception, 'Lockdown fault'.
Change this to external abort. For non-LPAE we now get the documented:
| Unhandled fault: external abort on non-linefetch (0x008) at 0x9c800f00
and for LPAE:
| Unhandled fault: synchronous external abort (0x210) at 0x9c800f00
Reported-by: Beata Michalska <beata.michal...@linaro.org>
Signed-off-by: James Morse <james.mo...@arm.com>
---
virt/kvm/arm/aarch32.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/virt/kvm/arm/aarch32.c b/virt/kvm/arm/aarch32.c
index 942108b62cd3..90433bc486d5 100644
--- a/virt/kvm/arm/aarch32.c
+++ b/virt/kvm/arm/aarch32.c
@@ -14,6 +14,10 @@
#include <asm/kvm_emulate.h>
#include <asm/kvm_hyp.h>
+#define DFSR_FSC_EXTABT_LPAE 0x10
+#define DFSR_FSC_EXTABT_nLPAE 0x08
+#define DFSR_LPAE BIT(9)
+
/*
* Table taken from ARMv8 ARM DDI0487B-B, table G1-10.
*/
@@ -91,10 +95,10 @@ static void inject_abt32(struct kvm_vcpu *vcpu, bool
is_pabt,
/* Give the guest an IMPLEMENTATION DEFINED exception */
is_lpae = (vcpu_cp15(vcpu, c2_TTBCR) >> 31);
if (is_lpae) {
- *fsr = 1 << 9 | 0x34;
+ *fsr = DFSR_LPAE | DFSR_FSC_EXTABT_LPAE;
} else {
- /* Surprise! DFSR's FS[4] lives in bit 10 */
- *fsr = BIT(10) | 0x4; /* 0x14 */
+ /* no need to shuffle FS[4] into DFSR[10] as its 0 */
+ *fsr = DFSR_FSC_EXTABT_nLPAE;
}
}
--
2.24.1
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