3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexander Graf <agraf@xxxxxxx> commit d3286144c92ec876da9e30320afa875699b7e0f1 upstream. 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 <ben.c@xxxxxxxxxxxx> Signed-off-by: Alexander Graf <agraf@xxxxxxx> Tested-by: Ben Collins <ben.c@xxxxxxxxxxxx> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> Cc: Qiang Huang <h.huangqiang@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/powerpc/kvm/emulate.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/powerpc/kvm/emulate.c +++ b/arch/powerpc/kvm/emulate.c @@ -36,6 +36,7 @@ #define OP_TRAP_64 2 #define OP_31_XOP_LWZX 23 +#define OP_31_XOP_DCBF 86 #define OP_31_XOP_LBZX 87 #define OP_31_XOP_STWX 151 #define OP_31_XOP_STBX 215 @@ -373,6 +374,7 @@ int kvmppc_emulate_instruction(struct kv kvmppc_set_exit_type(vcpu, EMULATED_MTSPR_EXITS); 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 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html