| From | Herton Ronaldo Krzesinski <> | Subject | [PATCH 14/93] KVM: PPC: Emulate dcbf | Date | Tue, 5 Feb 2013 20:06:03 -0200 |
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3.5.7.5 -stable review patch. If anyone has any objections, please let me know.
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From: Alexander Graf <agraf@suse.de>
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> [ herton: adjust context ] Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> --- 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 f90e86d..d382c91 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 @@ -351,6 +352,7 @@ 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 -- 1.7.9.5
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