Guests can trigger MMIO exits using dcbf. Since we don't emulate cache
incoherent MMIO, just do nothing and move on.
Reported-by: Ben Collins <be...@servergy.com>
Signed-off-by: Alexander Graf <ag...@suse.de>
Tested-by: Ben Collins <be...@servergy.com>
---
arch/powerpc/kvm/emulate.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index 71abcf4..7a73b6f 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -39,6 +39,7 @@
#define OP_31_XOP_TRAP 4
#define OP_31_XOP_LWZX 23
#define OP_31_XOP_TRAP_64 68
+#define OP_31_XOP_DCBF 86
#define OP_31_XOP_LBZX 87
#define OP_31_XOP_STWX 151
#define OP_31_XOP_STBX 215
@@ -369,6 +370,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct
kvm_vcpu *vcpu)
emulated = kvmppc_emulate_mtspr(vcpu, sprn, rs);
break;
+ case OP_31_XOP_DCBF:
case OP_31_XOP_DCBI:
/* Do nothing. The guest is performing dcbi because
* hardware DMA is not snooped by the dcache, but
--
1.6.0.2
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