This is a note to let you know that I've just added the patch titled
KVM: PPC: Book3S HV: Pass the correct trap argument to kvmhv_commence_exit
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-ppc-book3s-hv-pass-the-correct-trap-argument-to-kvmhv_commence_exit.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7e022e717f54897e396504306d0c9b61452adf4e Mon Sep 17 00:00:00 2001
From: "Gautham R. Shenoy" <ego@xxxxxxxxxxxxxxxxxx>
Date: Thu, 21 May 2015 13:57:04 +0530
Subject: KVM: PPC: Book3S HV: Pass the correct trap argument to kvmhv_commence_exit
From: "Gautham R. Shenoy" <ego@xxxxxxxxxxxxxxxxxx>
commit 7e022e717f54897e396504306d0c9b61452adf4e upstream.
In guest_exit_cont we call kvmhv_commence_exit which expects the trap
number as the argument. However r3 doesn't contain the trap number at
this point and as a result we would be calling the function with a
spurious trap number.
Fix this by copying r12 into r3 before calling kvmhv_commence_exit as
r12 contains the trap number.
Fixes: eddb60fb1443
Signed-off-by: Gautham R. Shenoy <ego@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 1 +
1 file changed, 1 insertion(+)
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -1171,6 +1171,7 @@ mc_cont:
bl kvmhv_accumulate_time
#endif
+ mr r3, r12
/* Increment exit count, poke other threads to exit */
bl kvmhv_commence_exit
nop
Patches currently in stable-queue which might be from ego@xxxxxxxxxxxxxxxxxx are
queue-4.1/kvm-ppc-book3s-hv-pass-the-correct-trap-argument-to-kvmhv_commence_exit.patch
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