[ 3.5.y.z extended stable ] Patch "KVM: PPC: Emulate dcbf" has been added to staging queue
Herton Ronaldo Krzesinski
herton.krzesinski at canonical.com
Wed Jan 30 21:57:28 UTC 2013
This is a note to let you know that I have just added a patch titled
KVM: PPC: Emulate dcbf
to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Herton
------
>From a20e33977677517504f2968951ce29fd9b27753d Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf at suse.de>
Date: Thu, 17 Jan 2013 13:50:25 +0100
Subject: [PATCH] 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 at servergy.com>
Signed-off-by: Alexander Graf <agraf at suse.de>
Tested-by: Ben Collins <ben.c at servergy.com>
[ herton: adjust context ]
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at 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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