From: "Fenghua Yu" <fenghua.yu@intel.com>
To: "H. Peter Anvin" <hpa@linux.intel.com>,
"Ingo Molnar" <mingo@elte.hu>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Asit K Mallick" <asit.k.mallick@intel.com>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>,
"x86" <x86@kernel.org>, "Fenghua Yu" <fenghua.yu@intel.com>
Subject: [PATCH 10/15] x86/xsaves: Clear reserved bits in xsave header
Date: Mon, 26 May 2014 10:01:17 -0700 [thread overview]
Message-ID: <1401123682-5384-11-git-send-email-fenghua.yu@intel.com> (raw)
In-Reply-To: <1401123682-5384-1-git-send-email-fenghua.yu@intel.com>
From: Fenghua Yu <fenghua.yu@intel.com>
The reserved bits (128~511) in the xsave header must be zero. Clear the bits
here.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
---
arch/x86/kernel/i387.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index d5dd808..a9a4229 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -375,7 +375,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset,
/*
* These bits must be zero.
*/
- xsave_hdr->reserved1[0] = xsave_hdr->reserved1[1] = 0;
+ memset(xsave_hdr->reserved, 0, 48);
return ret;
}
--
1.8.1.2
next prev parent reply other threads:[~2014-05-26 16:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-26 17:01 [PATCH 0/15] x86/xsaves: Optimize xstate context switch by xsaves/xrstors Fenghua Yu
2014-05-26 17:01 ` [PATCH 01/15] x86/xsaves: Detect xsaves/xrstors feature Fenghua Yu
2014-05-26 17:01 ` [PATCH 02/15] x86/xsaves: Add kernel parameter to disable xsaves/xrstors Fenghua Yu
2014-05-26 17:01 ` [PATCH 03/15] x86/alternative: Add alternative_input_2 Fenghua Yu
2014-05-26 17:01 ` [PATCH 04/15] x86/xsaves: Change compacted format xsave area header Fenghua Yu
2014-05-26 17:01 ` [PATCH 05/15] x86/xsaves: Define macros for xsave instructions Fenghua Yu
2014-05-26 17:01 ` [PATCH 06/15] x86/xsaves: Define macro for handle xsave/xrstor fault Fenghua Yu
2014-05-26 17:01 ` [PATCH 07/15] x86/xsaves: Use xsaves/xrstors for saving and restoring xsave area Fenghua Yu
2014-05-26 17:01 ` [PATCH 08/15] x86/xsaves: Use xsaves/xrstors for context switch Fenghua Yu
2014-05-26 17:01 ` [PATCH 09/15] x86/xsaves: Use xsave/xrstor for saving and restoring user space context Fenghua Yu
2014-05-26 17:01 ` Fenghua Yu [this message]
2014-05-26 17:01 ` [PATCH 11/15] x86/xsaves: Add xsaves and xrstors support for booting time Fenghua Yu
2014-05-26 17:01 ` [PATCH 12/15] x86/xsaves: Save xstate to task's xsave area in __save_fpu during " Fenghua Yu
2014-05-26 17:01 ` [PATCH 13/15] x86/xsaves: Call booting time xsaves and xrstors in setup_init_fpu_buf Fenghua Yu
2014-05-26 17:01 ` [PATCH 14/15] x86/xsaves: Enable xsaves/xrstors Fenghua Yu
2014-05-26 17:01 ` [PATCH 15/15] Define kernel API to get address of each state in xsave area Fenghua Yu
2014-05-26 19:37 ` [PATCH 0/15] x86/xsaves: Optimize xstate context switch by xsaves/xrstors Andy Lutomirski
2014-05-26 20:13 ` Yu, Fenghua
2014-05-26 20:53 ` H. Peter Anvin
2014-05-26 21:40 ` Andy Lutomirski
2014-05-26 21:47 ` H. Peter Anvin
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