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Date: Fri, 7 Mar 2014 17:07:43 -0800 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Ben Collins <ben.c@...vergy.com>, Alexander Graf <agraf@...e.de>, Ben Hutchings <ben@...adent.org.uk>, Qiang Huang <h.huangqiang@...wei.com> Subject: [PATCH 3.4 47/99] KVM: PPC: Emulate dcbf 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexander Graf <agraf@...e.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@...vergy.com> Signed-off-by: Alexander Graf <agraf@...e.de> Tested-by: Ben Collins <ben.c@...vergy.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@...adent.org.uk> Cc: Qiang Huang <h.huangqiang@...wei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- arch/powerpc/kvm/emulate.c | 2 ++ 1 file changed, 2 insertions(+) --- 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 kv 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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