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authorAlexander Graf <agraf@suse.de>2013-01-17 13:50:25 +0100
committerBen Hutchings <ben@decadent.org.uk>2013-02-06 04:33:37 +0000
commit1a14c25a0b523225ba47a983d094d1b253f2585a (patch)
tree866f73710543ac0b1e0becdafb6c1b6ee3946fae /arch
parent6521d6734943f2ecb34f69c403ae91b1fcf11c64 (diff)
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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 <ben.c@servergy.com> Signed-off-by: Alexander Graf <agraf@suse.de> Tested-by: Ben Collins <ben.c@servergy.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kvm/emulate.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index 141dce3..2a73d82 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