From: Alejandro Vallejo <alejandro.garciavallejo@amd.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
"Roger Pau Monné" <roger.pau@citrix.com>,
"Jason Andryuk" <jason.andryuk@amd.com>,
"Xenia Ragiadakou" <xenia.ragiadakou@amd.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
xen-devel@lists.xenproject.org
Subject: Re: [RFC PATCH 01/11] x86: Add more granularity to the vendors in Kconfig
Date: Thu, 27 Nov 2025 13:37:30 +0100 [thread overview]
Message-ID: <DEJHDU8GFRN2.DQ8R4SWFRI1V@amd.com> (raw)
In-Reply-To: <178630e8-7986-4a35-863c-4559779d7390@suse.com>
On Thu Nov 27, 2025 at 10:59 AM CET, Jan Beulich wrote:
> On 26.11.2025 17:44, Alejandro Vallejo wrote:
>> This enables very aggressive DCE passes on single-vendor builds in later
>> patches, as it will allow most vendor checks to become statically chosen
>> branches. A lot of statics go away and a lot more inlining is allowed.
>>
>> In order to allow x86_vendor_is() to fold into constants, expand Kconfig
>> to have the full set of vendors. Adds Hygon, Centaur, Shanghai and the
>> default path.
>
> Oh, one more thing: There's x86_vendor_is() yet, so what it is going to be
> needs at least roughly explaining here.
>
> Jan
Fair enough.
Cheers,
Alejandro
next prev parent reply other threads:[~2025-11-27 12:37 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-26 16:44 [RFC PATCH 00/11] x86 vendor check optimisations Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 01/11] x86: Add more granularity to the vendors in Kconfig Alejandro Vallejo
2025-11-27 9:43 ` Jan Beulich
2025-11-27 12:36 ` Alejandro Vallejo
2025-11-27 13:19 ` Jan Beulich
2025-11-27 13:44 ` Alejandro Vallejo
2025-11-27 14:00 ` Jan Beulich
2025-11-27 9:59 ` Jan Beulich
2025-11-27 12:37 ` Alejandro Vallejo [this message]
2025-11-27 21:01 ` Andrew Cooper
2025-11-26 16:44 ` [RFC PATCH 02/11] x86: Reject CPU policies with vendors other than the host's Alejandro Vallejo
2025-11-27 20:15 ` Andrew Cooper
2025-11-26 16:44 ` [RFC PATCH 03/11] x86: Add x86_vendor_is() by itself before using it Alejandro Vallejo
2025-11-27 10:46 ` Jan Beulich
2025-11-27 13:15 ` Alejandro Vallejo
2025-11-27 13:37 ` Jan Beulich
2025-11-27 14:06 ` Alejandro Vallejo
2025-11-27 14:14 ` Jan Beulich
2025-11-27 20:36 ` Andrew Cooper
2025-11-28 9:08 ` Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 04/11] x86: Refactor early vendor lookup code to use x86_vendor_is() Alejandro Vallejo
2025-11-27 10:51 ` Jan Beulich
2025-11-27 13:35 ` Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 05/11] x86: Conditionalise the inclusion of Hygon/Centaur/Shanghai cpu/ files Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 06/11] x86: Migrate switch-based vendor checks to x86_vendor_is() Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 07/11] x86: Migrate MSR handler " Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 08/11] x86: Migrate insn emulator to use x86_vendor_is() Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 09/11] x86: Migrate spec_ctrl vendor checks to x86_vendor_is() Alejandro Vallejo
2025-12-08 16:01 ` Jan Beulich
2025-12-08 16:04 ` Jan Beulich
2025-12-11 10:31 ` Alejandro Vallejo
2025-12-11 15:38 ` Andrew Cooper
2025-12-11 16:58 ` Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 10/11] x86: Migrate everything under cpu/ to use x86_vendor_is() Alejandro Vallejo
2025-11-26 16:44 ` [RFC PATCH 11/11] x86: Migrate every remaining raw vendor check to x86_vendor_is() Alejandro Vallejo
2025-11-27 22:11 ` [RFC PATCH 00/11] x86 vendor check optimisations Andrew Cooper
2025-11-28 9:18 ` Alejandro Vallejo
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