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| author | Alexander Graf <agraf@suse.de> | 2013-01-17 13:50:25 +0100 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-01-18 00:40:49 +0100 |
| commit | d3286144c92ec876da9e30320afa875699b7e0f1 (patch) | |
| tree | 6c645f085dbe1a601891d40c317427694432aafd | |
| parent | dfdebc24837ed0a1d6ad73b108a10d3c88d1b6e8 (diff) | |
| download | linux-stable-d3286144c92ec876da9e30320afa875699b7e0f1.tar.gz linux-stable-d3286144c92ec876da9e30320afa875699b7e0f1.tar.bz2 linux-stable-d3286144c92ec876da9e30320afa875699b7e0f1.zip | |
KVM: PPC: Emulate dcbf
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>
CC: stable@vger.kernel.org
| -rw-r--r-- | 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 b0855e5d8905..9d9cddc5b346 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 @@ -374,6 +375,7 @@ 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 |