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| author | Alexander Graf <agraf@suse.de> | 2013-01-17 13:50:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-03 18:26:59 -0600 |
| commit | 398fdc67c92fdcffc11588ced695c2f212b33e8c (patch) | |
| tree | 280315bf3145f0b2e2d5433d9868728d24123a01 | |
| parent | b8ea1c8ac10cc7cfa8f175086158c987daad3653 (diff) | |
| download | lwn-398fdc67c92fdcffc11588ced695c2f212b33e8c.tar.gz lwn-398fdc67c92fdcffc11588ced695c2f212b33e8c.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>
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 ee04abaefe23..f6ba56f47158 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 @@ -353,6 +354,7 @@ 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 |