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From: Chao Gao <chao.gao@intel.com>
To: "Chang S. Bae" <chang.seok.bae@intel.com>
Cc: <tglx@linutronix.de>, <dave.hansen@intel.com>, <x86@kernel.org>,
	<seanjc@google.com>, <pbonzini@redhat.com>,
	<linux-kernel@vger.kernel.org>, <kvm@vger.kernel.org>,
	<peterz@infradead.org>, <rick.p.edgecombe@intel.com>,
	<weijiang.yang@intel.com>, <john.allen@amd.com>, <bp@alien8.de>
Subject: Re: [PATCH v3 04/10] x86/fpu/xstate: Correct guest fpstate size calculation
Date: Mon, 10 Mar 2025 15:06:42 +0800	[thread overview]
Message-ID: <Z86PgkOXRfNFkoBX@intel.com> (raw)
In-Reply-To: <24b5d917-9dd0-4d5b-bca8-d9683756baff@intel.com>

On Sun, Mar 09, 2025 at 10:21:12PM -0700, Chang S. Bae wrote:
>On 3/9/2025 6:33 PM, Chao Gao wrote:
>> 
>> This is fixed by the patch 3.
>
>Well, take a look at your changelog — the context is quite different. I don't
>think it'S mergeable without a rewrite. Also, this should be a standalone fix
>to complement the recent tip-tree changes.

Should patch 2 be posted separately?

Because current tip/master branch has:

	gfpu->xfeatures		= fpu_user_cfg.default_features;
	gfpu->perm		= fpu_user_cfg.default_features;

Adjusting only fpu_guest->features raises the question: why isn't gfpu->perm
adjusted as well?

If patch 2 should go first, I don't think it's necessary to post patches 2-3
separately as maintainers can easily pick up patches 1-3 when they are in good
shape.

Regarding the changelog, I am uncertain what's quite different in the context.
It seems both you and I are talking about the inconsistency between
gfpu->xfeatures and fpstate->xfeatures. Did I miss something obvious?

  reply	other threads:[~2025-03-10  7:06 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-03-07 16:41 [PATCH v3 00/10] Introduce CET supervisor state support Chao Gao
2025-03-07 16:41 ` [PATCH v3 01/10] x86/fpu/xstate: Always preserve non-user xfeatures/flags in __state_perm Chao Gao
2025-03-07 16:41 ` [PATCH v3 02/10] x86/fpu/xstate: Drop @perm from guest pseudo FPU container Chao Gao
2025-03-07 16:41 ` [PATCH v3 03/10] x86/fpu/xstate: Correct xfeatures cache in guest pseudo fpu container Chao Gao
2025-03-07 17:48   ` Dave Hansen
2025-03-08  2:44     ` Chao Gao
2025-03-07 16:41 ` [PATCH v3 04/10] x86/fpu/xstate: Correct guest fpstate size calculation Chao Gao
2025-03-07 17:53   ` Dave Hansen
2025-03-08  2:56     ` Chao Gao
2025-03-07 21:37   ` Chang S. Bae
2025-03-08  2:49     ` Chao Gao
2025-03-09 22:06       ` Chang S. Bae
2025-03-10  1:33         ` Chao Gao
2025-03-10  5:21           ` Chang S. Bae
2025-03-10  7:06             ` Chao Gao [this message]
2025-03-10 17:33               ` Chang S. Bae
2025-03-11 12:09                 ` Chao Gao
2025-03-12  1:03                   ` Chang S. Bae
2025-03-07 16:41 ` [PATCH v3 05/10] x86/fpu/xstate: Introduce guest FPU configuration Chao Gao
2025-03-07 18:06   ` Dave Hansen
2025-03-08  3:00     ` Chao Gao
2025-03-07 16:41 ` [PATCH v3 06/10] x86/fpu/xstate: Initialize guest perm with fpu_guest_cfg Chao Gao
2025-03-07 18:14   ` Dave Hansen
2025-03-08  3:14     ` Chao Gao
2025-03-07 16:41 ` [PATCH v3 07/10] x86/fpu/xstate: Initialize guest fpstate with fpu_guest_config Chao Gao
2025-03-07 18:41   ` Dave Hansen
2025-03-08  3:38     ` Chao Gao
2025-03-07 16:41 ` [PATCH v3 08/10] x86/fpu/xstate: Add CET supervisor xfeature support Chao Gao
2025-03-07 18:39   ` Dave Hansen
2025-03-08  3:24     ` Chao Gao
2025-03-07 16:41 ` [PATCH v3 09/10] x86/fpu/xstate: Introduce XFEATURE_MASK_KERNEL_DYNAMIC xfeature set Chao Gao
2025-03-09 22:06   ` Chang S. Bae
2025-03-10  3:49     ` Chao Gao
2025-03-10  5:20       ` Chang S. Bae
2025-03-10  5:53         ` Chao Gao
2025-03-11 12:27           ` Chao Gao
2025-03-12  1:03             ` Chang S. Bae
2025-03-07 16:41 ` [PATCH v3 10/10] x86/fpu/xstate: Warn if CET supervisor state is detected in normal fpstate Chao Gao
2025-03-07 19:09 ` [PATCH v3 00/10] Introduce CET supervisor state support Dave Hansen
2025-03-18 15:24   ` Chao Gao

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