From: Andi Kleen <andi@firstfloor.org>
To: x86@kernel.org
Cc: hpa@zytor.com, linux-kernel@vger.kernel.org
Subject: Support generic disabling of all XSAVE features
Date: Thu, 5 Oct 2017 14:52:51 -0700 [thread overview]
Message-ID: <20171005215256.25659-1-andi@firstfloor.org> (raw)
For performance testing and debugging it can be useful to disable XSAVE
features individually.
This patchkit hooks up XSAVE with the generic clearcpuid=... option,
so that disabling a CPUID feature automatically disables the respective
XSAVE feature.
It also cleans up CPUID dependency management. Currently it's
possible to generate configurations with cleacpuid that crash.
It replaces an earlier patchkit that did this with special
case options.
v1:
Initial post
v2:
Work around broken lguest by exporting set_cpu_cap
Repost with cover letter
v3:
Repost. No changes to code.
v4:
Rebase to latest tree. Repost.
v5:
Fix dependency algorithm. Clean dups in table. Rebase.
v6:
Rebase. No changes to code.
v7:
Rebase. No changes to code.
v8:
Address all review comments. Add Reviewed-bys.
Dependency checker restructured for feature->dependency
Add missing dependency for AVX->AVX512F
next reply other threads:[~2017-10-05 21:53 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-05 21:52 Andi Kleen [this message]
2017-10-05 21:52 ` [PATCH v8 1/5] x86/xsave: Move xsave initialization to after parsing early parameters Andi Kleen
2017-10-05 21:52 ` [PATCH v8 2/5] x86/cpuid: Add generic table for cpuid dependencies Andi Kleen
2017-10-05 22:41 ` Thomas Gleixner
2017-10-05 23:08 ` Andi Kleen
2017-10-05 23:34 ` Andi Kleen
2017-10-05 21:52 ` [PATCH v8 3/5] x86/cpuid: Make clearcpuid an early param Andi Kleen
2017-10-05 21:52 ` [PATCH v8 4/5] x86/xsave: Make XSAVE check the base CPUID features before enabling Andi Kleen
2017-11-11 23:15 ` [v8, " Guenter Roeck
2017-11-12 6:41 ` Andi Kleen
2017-11-14 1:28 ` Andi Kleen
2017-11-14 1:49 ` Guenter Roeck
2017-11-16 19:03 ` Andi Kleen
2017-11-16 22:13 ` Guenter Roeck
2017-11-14 2:33 ` Guenter Roeck
2019-06-29 15:22 ` [PATCH v8 " Vegard Nossum
2019-07-01 12:17 ` Sebastian Andrzej Siewior
2019-07-01 16:41 ` Andi Kleen
2019-07-01 16:39 ` Andi Kleen
2017-10-05 21:52 ` [PATCH v8 5/5] x86/xsave: Remove the explicit clearing of XSAVE dependend features Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2017-10-13 21:56 Support generic disabling of all XSAVE features Andi Kleen
2017-10-07 0:03 Andi Kleen
2017-10-04 23:49 Andi Kleen
2017-09-19 22:26 Andi Kleen
2017-07-25 0:43 Andi Kleen
2017-06-21 23:41 Andi Kleen
2017-06-07 23:29 Andi Kleen
2017-06-13 0:17 ` Andi Kleen
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