From: <gregkh@linuxfoundation.org>
To: julien.thierry@arm.com, catalin.marinas@arm.com,
christoffer.dall@linaro.org, gregkh@linuxfoundation.org,
linux@armlinux.org.uk, marc.zyngier@arm.com, will.deacon@arm.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "arm/arm64: kvm: Disable branch profiling in HYP code" has been added to the 4.9-stable tree
Date: Sun, 05 Nov 2017 15:45:18 +0100 [thread overview]
Message-ID: <1509893118135201@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
arm/arm64: kvm: Disable branch profiling in HYP code
to the 4.9-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:
arm-arm64-kvm-disable-branch-profiling-in-hyp-code.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From f9b269f3098121b5d54aaf822e0898c8ed1d3fec Mon Sep 17 00:00:00 2001
From: Julien Thierry <julien.thierry@arm.com>
Date: Fri, 20 Oct 2017 12:34:17 +0100
Subject: arm/arm64: kvm: Disable branch profiling in HYP code
From: Julien Thierry <julien.thierry@arm.com>
commit f9b269f3098121b5d54aaf822e0898c8ed1d3fec upstream.
When HYP code runs into branch profiling code, it attempts to jump to
unmapped memory, causing a HYP Panic.
Disable the branch profiling for code designed to run at HYP mode.
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm/kvm/hyp/Makefile | 2 +-
arch/arm64/kvm/hyp/Makefile | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm/kvm/hyp/Makefile
+++ b/arch/arm/kvm/hyp/Makefile
@@ -2,7 +2,7 @@
# Makefile for Kernel-based Virtual Machine module, HYP part
#
-ccflags-y += -fno-stack-protector
+ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING
KVM=../../../../virt/kvm
--- a/arch/arm64/kvm/hyp/Makefile
+++ b/arch/arm64/kvm/hyp/Makefile
@@ -2,7 +2,7 @@
# Makefile for Kernel-based Virtual Machine module, HYP part
#
-ccflags-y += -fno-stack-protector
+ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING
KVM=../../../../virt/kvm
Patches currently in stable-queue which might be from julien.thierry@arm.com are
queue-4.9/arm-arm64-kvm-disable-branch-profiling-in-hyp-code.patch
reply other threads:[~2017-11-05 14:45 UTC|newest]
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