From: "H. Peter Anvin" <hpa@zytor.com>
To: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>,
Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/7] x86, xsave: disable xsave in i387 emulation mode
Date: Mon, 26 Jul 2010 11:26:36 -0700 [thread overview]
Message-ID: <4C4DD35C.8060708@zytor.com> (raw)
In-Reply-To: <20100722123603.GU26154@erda.amd.com>
On 07/22/2010 05:36 AM, Robert Richter wrote:
> On 21.07.10 14:16:02, Suresh Siddha wrote:
>
>> I think it is cleaner to clear these cpu capabilities in the function
>> which handles no387 boot parameter.
>
> This does not cover all (of course weird but potentially existing)
> cases. Disabling xsave in the no387 setup would only work if an fpu
> exists.
If the fpu doesn't exist, then xsave can't exist, either.
-hpa
next prev parent reply other threads:[~2010-07-26 18:26 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-21 17:03 [PATCH 0/7] x86, xsave: some code cleanups and reworks, -v2 Robert Richter
2010-07-21 17:03 ` [PATCH 1/7] x86, xsave: separate fpu and xsave initialization Robert Richter
2010-07-21 22:36 ` [tip:x86/xsave] x86, xsave: Separate " tip-bot for Robert Richter
2010-07-21 17:03 ` [PATCH 2/7] x86, xsave: introduce xstate enable functions Robert Richter
2010-07-21 21:10 ` H. Peter Anvin
2010-07-21 21:20 ` Suresh Siddha
2010-07-21 21:53 ` H. Peter Anvin
2010-07-21 22:32 ` Suresh Siddha
2010-07-22 12:15 ` Robert Richter
2010-07-22 12:23 ` H. Peter Anvin
2010-07-22 13:16 ` Robert Richter
2010-07-21 22:38 ` [tip:x86/xsave] x86, xsave: Make xstate_enable_boot_cpu() __init, protect on CPU 0 tip-bot for H. Peter Anvin
2010-07-21 22:37 ` [tip:x86/xsave] x86, xsave: Introduce xstate enable functions tip-bot for Robert Richter
2010-07-21 17:03 ` [PATCH 3/7] x86, xsave: check cpuid level for XSTATE_CPUID (0x0d) Robert Richter
2010-07-21 22:37 ` [tip:x86/xsave] x86, xsave: Check " tip-bot for Robert Richter
2010-07-21 17:03 ` [PATCH 4/7] x86, xsave: make init_xstate_buf static Robert Richter
2010-07-21 22:37 ` [tip:x86/xsave] x86, xsave: Make " tip-bot for Robert Richter
2010-07-21 17:03 ` [PATCH 5/7] x86, xsave: add __init attribute to setup_xstate_features() Robert Richter
2010-07-21 22:37 ` [tip:x86/xsave] x86, xsave: Add " tip-bot for Robert Richter
2010-07-21 17:03 ` [PATCH 6/7] x86, xsave: disable xsave in i387 emulation mode Robert Richter
2010-07-21 18:16 ` Suresh Siddha
2010-07-22 12:36 ` Robert Richter
2010-07-23 17:50 ` Suresh Siddha
2010-07-26 16:42 ` Robert Richter
2010-07-26 18:26 ` H. Peter Anvin [this message]
2010-07-27 8:53 ` Robert Richter
2010-08-12 22:06 ` [tip:x86/fpu] x86, xsave: Disable " tip-bot for Robert Richter
2010-07-21 17:03 ` [PATCH 7/7] x86: removing boot_cpu_id variable Robert Richter
2010-08-12 21:03 ` [tip:x86/cleanups] x86, cleanup: Remove obsolete " tip-bot for Robert Richter
2010-07-21 18:19 ` [PATCH 0/7] x86, xsave: some code cleanups and reworks, -v2 Suresh Siddha
2010-07-21 20:55 ` H. Peter Anvin
2010-07-21 21:07 ` H. Peter Anvin
2010-08-10 19:24 ` [osrc-patches] " Robert Richter
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