Patch "arm/arm64: kvm: Disable branch profiling in HYP code" has been added to the 4.13-stable tree

Patch "arm/arm64: kvm: Disable branch profiling in HYP code" has been added to the 4.13-stable tree

[gregkh]

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 4.13-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-4.13 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-4.13/arm-arm64-kvm-disable-branch-profiling-in-hyp-code.patch