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List: xen-cvs
Subject: [Xen-changelog] [xen master] xen/arm64: Correctly align VFP regs
From: patchbot () xen ! org
Date: 2014-04-18 8:44:34
Message-ID: E1Wb4PS-0003NK-4Z () xenbits ! xen ! org
[Download RAW message or body]
commit 9b4e96724eeb916f2cd311d9133f00c216caa321
Author: Julien Grall <julien.grall@linaro.org>
AuthorDate: Thu Apr 10 12:43:57 2014 +0100
Commit: Ian Campbell <ian.campbell@citrix.com>
CommitDate: Wed Apr 16 17:00:47 2014 +0100
xen/arm64: Correctly align VFP regs
On arm64, VFP instructions requires vfpregs to be 128-byte aligned.
By chance, the field is already correctly aligned. In the case if someone
decides to add a new field before, Xen will receive a data abort as soon as
it saves/restores VFP.
We are safe on arm32 as the only constraint is to be 32-byte aligned.
Reported-by: Chen Baozi <baozich@gmail.com>
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
xen/include/asm-arm/arm64/vfp.h | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/xen/include/asm-arm/arm64/vfp.h b/xen/include/asm-arm/arm64/vfp.h
index 373f156..6ab5d36 100644
--- a/xen/include/asm-arm/arm64/vfp.h
+++ b/xen/include/asm-arm/arm64/vfp.h
@@ -1,9 +1,12 @@
#ifndef _ARM_ARM64_VFP_H
#define _ARM_ARM64_VFP_H
+/* ARM64 VFP instruction requires fpregs address to be 128-byte aligned */
+#define __vfp_aligned __attribute__((aligned(16)))
+
struct vfp_state
{
- uint64_t fpregs[64];
+ uint64_t fpregs[64] __vfp_aligned;
uint32_t fpcr;
uint32_t fpexc32_el2;
uint32_t fpsr;
--
generated by git-patchbot for /home/xen/git/xen.git#master
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