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From: "Bae, Chang Seok" <chang.seok.bae@intel.com>
To: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"mingo@kernel.org" <mingo@kernel.org>,
	"x86@kernel.org" <x86@kernel.org>,
	"Brown, Len" <len.brown@intel.com>,
	"Hansen, Dave" <dave.hansen@intel.com>,
	"Liu, Jing2" <jing2.liu@intel.com>,
	"Shankar, Ravi V" <ravi.v.shankar@intel.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 08/21] x86/fpu/xstate: Define the scope of the initial xstate data
Date: Tue, 9 Feb 2021 15:38:58 +0000	[thread overview]
Message-ID: <C97BCE05-8033-4605-8699-8558BB7D905B@intel.com> (raw)
In-Reply-To: <20210209124906.GC15909@zn.tnic>

On Feb 9, 2021, at 04:49, Borislav Petkov <bp@suse.de> wrote:
> On Mon, Feb 08, 2021 at 06:53:23PM +0000, Bae, Chang Seok wrote:
> Yours does. So drop it from this one and from all the other patches as
> it is causing more confusion than it is trying to dispel.

Okay.

>> I think they are in a different context.
>> 
>> The helper indicates the mask for the ‘init_fpstate’ buffer. The rest is the
>> initial mask value for the per-task xstate buffer.
> 
> Wait, what?
> 
> Are you trying to tell me that that helper will return different masks
> depending on xfeatures_mask_user_dynamic, which changes in its lifetime?

At least in this series, no. But I thought it is possible in the future.

> Then drop that helper altogether - that is more confusion and the xstate
> code is already confusing enough.

Okay.

>> Since you suggested to introduce get_xstate_buffer_attr(), how about replacing
>> what you found with something like:
>> 
>> get_xstate_buffer_attr(XSTATE_INIT_MASK)
> 
> I'd prefer no helper at all but only comments above the usage site.

Yes, I will do that.

Thanks,
Chang

  reply	other threads:[~2021-02-09 15:40 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-23 15:56 [PATCH v3 00/21] x86: Support Intel Advanced Matrix Extensions Chang S. Bae
2020-12-23 15:56 ` [PATCH v3 01/21] x86/fpu/xstate: Modify initialization helper to handle both static and dynamic buffers Chang S. Bae
2021-01-15 12:40   ` Borislav Petkov
2020-12-23 15:56 ` [PATCH v3 02/21] x86/fpu/xstate: Modify state copy helpers " Chang S. Bae
2021-01-15 12:50   ` Borislav Petkov
2021-01-19 18:50     ` Bae, Chang Seok
2021-01-20 20:53       ` Borislav Petkov
2021-01-20 21:12         ` Bae, Chang Seok
2020-12-23 15:56 ` [PATCH v3 03/21] x86/fpu/xstate: Modify address finders " Chang S. Bae
2021-01-15 13:06   ` Borislav Petkov
2020-12-23 15:57 ` [PATCH v3 04/21] x86/fpu/xstate: Modify context switch helpers " Chang S. Bae
2021-01-15 13:18   ` Borislav Petkov
2021-01-19 18:49     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 05/21] x86/fpu/xstate: Add a new variable to indicate dynamic user states Chang S. Bae
2021-01-15 13:39   ` Borislav Petkov
2021-01-15 19:47     ` Bae, Chang Seok
2021-01-19 15:57       ` Borislav Petkov
2021-01-19 18:57         ` Bae, Chang Seok
2021-01-22 10:56           ` Borislav Petkov
2021-01-27  1:23             ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 06/21] x86/fpu/xstate: Calculate and remember dynamic xstate buffer sizes Chang S. Bae
2021-01-22 11:44   ` Borislav Petkov
2021-01-27  1:23     ` Bae, Chang Seok
2021-01-27  9:38       ` Borislav Petkov
2021-02-03  2:54         ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 07/21] x86/fpu/xstate: Introduce helpers to manage dynamic xstate buffers Chang S. Bae
2021-01-26 20:17   ` Borislav Petkov
2021-01-27  1:23     ` Bae, Chang Seok
2021-01-27 10:41       ` Borislav Petkov
2021-02-03  4:10         ` Bae, Chang Seok
2021-02-04 13:10           ` Borislav Petkov
2021-02-03  4:10     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 08/21] x86/fpu/xstate: Define the scope of the initial xstate data Chang S. Bae
2021-02-08 12:33   ` Borislav Petkov
2021-02-08 18:53     ` Bae, Chang Seok
2021-02-09 12:49       ` Borislav Petkov
2021-02-09 15:38         ` Bae, Chang Seok [this message]
2020-12-23 15:57 ` [PATCH v3 09/21] x86/fpu/xstate: Introduce wrapper functions to organize xstate buffer access Chang S. Bae
2021-02-08 12:33   ` Borislav Petkov
2021-02-09 15:50     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 10/21] x86/fpu/xstate: Update xstate save function to support dynamic xstate Chang S. Bae
2021-01-07  8:41   ` Liu, Jing2
2021-01-07 18:40     ` Bae, Chang Seok
2021-01-12  2:52       ` Liu, Jing2
2021-01-15  4:59         ` Bae, Chang Seok
2021-01-15  5:45           ` Liu, Jing2
2021-02-08 12:33   ` Borislav Petkov
2021-02-09 15:48     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 11/21] x86/fpu/xstate: Update xstate buffer address finder " Chang S. Bae
2021-02-19 15:00   ` Borislav Petkov
2021-02-19 19:19     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 12/21] x86/fpu/xstate: Update xstate context copy function to support dynamic buffer Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 13/21] x86/fpu/xstate: Expand dynamic context switch buffer on first use Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 14/21] x86/fpu/xstate: Support ptracer-induced xstate buffer expansion Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 15/21] x86/fpu/xstate: Extend the table to map xstate components with features Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 16/21] x86/cpufeatures/amx: Enumerate Advanced Matrix Extension (AMX) feature bits Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 17/21] x86/fpu/amx: Define AMX state components and have it used for boot-time checks Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 18/21] x86/fpu/amx: Enable the AMX feature in 64-bit mode Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 19/21] selftest/x86/amx: Include test cases for the AMX state management Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 20/21] x86/fpu/xstate: Support dynamic user state in the signal handling path Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 21/21] x86/fpu/xstate: Introduce boot-parameters to control some state component support Chang S. Bae
2020-12-23 18:37   ` Randy Dunlap
2021-01-14 21:31     ` Bae, Chang Seok
2021-01-14 21:31 ` [PATCH v3 00/21] x86: Support Intel Advanced Matrix Extensions Bae, Chang Seok

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