From: "H. Peter Anvin" <hpa@linux.intel.com>
To: "Yu, Fenghua" <fenghua.yu@intel.com>,
Andy Lutomirski <luto@amacapital.net>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
"Mallick, Asit K" <asit.k.mallick@intel.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>, x86 <x86@kernel.org>
Subject: Re: [PATCH 0/15] x86/xsaves: Optimize xstate context switch by xsaves/xrstors
Date: Mon, 26 May 2014 13:53:39 -0700 [thread overview]
Message-ID: <5383A9D3.6030409@linux.intel.com> (raw)
In-Reply-To: <3E5A0FA7E9CA944F9D5414FEC6C712205A605703@ORSMSX106.amr.corp.intel.com>
On 05/26/2014 01:13 PM, Yu, Fenghua wrote:
>
> So I don't see we need xsaves/xrstors in user space. But I could be
> wrong.
>
XSAVES/XRSTORS are privileged. The user-space equivalents are
XSAVEC/XRSTOR.
-hpa
next prev parent reply other threads:[~2014-05-26 20:54 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 ` [PATCH 10/15] x86/xsaves: Clear reserved bits in xsave header Fenghua Yu
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 [this message]
2014-05-26 21:40 ` Andy Lutomirski
2014-05-26 21:47 ` H. Peter Anvin
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