From 1a14c25a0b523225ba47a983d094d1b253f2585a Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Thu, 17 Jan 2013 13:50:25 +0100 Subject: [PATCH] KVM: PPC: Emulate dcbf 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 Signed-off-by: Alexander Graf Tested-by: Ben Collins [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- arch/powerpc/kvm/emulate.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c index 141dce3c6810..2a73d821e1fc 100644 --- a/arch/powerpc/kvm/emulate.c +++ b/arch/powerpc/kvm/emulate.c @@ -35,6 +35,7 @@ #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 @@ -370,6 +371,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu) 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 -- 2.39.5