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| author | Alexander Graf <agraf@suse.de> | 2013-01-17 13:50:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-11 16:10:03 -0700 |
| commit | 67bc20f722e2d3b77566f3eac9e9f6ce1b890d23 (patch) | |
| tree | f2c6f42586d273f8dd83e827f7cf53c44e9d5616 | |
| parent | 115f50635c5addb145f20e090fa6345ee31fb2b8 (diff) | |
| download | lwn-67bc20f722e2d3b77566f3eac9e9f6ce1b890d23.tar.gz lwn-67bc20f722e2d3b77566f3eac9e9f6ce1b890d23.zip | |
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>
Cc: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 968f40101883..59a1edd56d46 100644 --- 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 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 |