From: Dave Hansen <dave.hansen@intel.com>
To: "Chang S. Bae" <chang.seok.bae@intel.com>, linux-kernel@vger.kernel.org
Cc: x86@kernel.org, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com
Subject: Re: [PATCH 1/6] x86/microcode: Introduce staging option to reduce late-loading latency
Date: Tue, 18 Feb 2025 07:16:25 -0800 [thread overview]
Message-ID: <5ed90792-ba64-476a-ad7c-6fdba7af3df1@intel.com> (raw)
In-Reply-To: <20241211014213.3671-2-chang.seok.bae@intel.com>
On 12/10/24 17:42, Chang S. Bae wrote:
> + if (microcode_ops->use_staging)
> + microcode_ops->stage_microcode();
I don't know if any non-Intel vendors will implement one of these, but
could we please comment this a _bit_?
Somebody is going to come along at some point and ask themselves whether
they should add a new staging handler or dump some new code in an
existing one. The key aspects of the existing staging handler are:
1. Helps the future actual microcode load in some way
2. Has little impact on the rest of the system
3. Can succeed or fail without affecting functionality
Did I miss any?
Could we add a comment here, or maybe even at the Intel
stage_microcode() function explaining this intent?
next prev parent reply other threads:[~2025-02-18 15:16 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-01 16:10 [PATCH RFC 0/7] x86/microcode: Support for Intel Staging Feature Chang S. Bae
2024-10-01 16:10 ` [PATCH RFC 1/7] x86/microcode/intel: Remove unnecessary cache writeback and invalidation Chang S. Bae
2024-10-25 16:24 ` [tip: x86/microcode] " tip-bot2 for Chang S. Bae
2024-10-01 16:10 ` [PATCH RFC 2/7] x86/microcode: Introduce staging option to reduce late-loading latency Chang S. Bae
2024-11-04 10:45 ` Borislav Petkov
2024-10-01 16:10 ` [PATCH RFC 3/7] x86/msr-index: Define MSR index and bit for the microcode staging feature Chang S. Bae
2024-10-01 16:10 ` [PATCH RFC 4/7] x86/microcode/intel: Prepare for microcode staging Chang S. Bae
2024-11-04 11:16 ` Borislav Petkov
2024-11-04 16:08 ` Dave Hansen
2024-11-04 18:34 ` Chang S. Bae
2024-11-04 20:10 ` Chang S. Bae
2024-11-06 18:23 ` [PATCH] cpufreq: Simplify MSR read on the boot CPU Chang S. Bae
2024-11-12 20:44 ` Rafael J. Wysocki
2024-11-06 18:28 ` [PATCH RFC 4/7] x86/microcode/intel: Prepare for microcode staging Chang S. Bae
2024-11-07 1:12 ` Thomas Gleixner
2024-11-08 22:42 ` Chang S. Bae
2024-11-08 22:51 ` Dave Hansen
2024-10-01 16:10 ` [PATCH RFC 5/7] x86/microcode/intel_staging: Implement staging logic Chang S. Bae
2024-10-01 16:10 ` [PATCH RFC 6/7] x86/microcode/intel_staging: Support mailbox data transfer Chang S. Bae
2024-10-01 16:10 ` [PATCH RFC 7/7] x86/microcode/intel: Enable staging when available Chang S. Bae
2024-12-11 1:42 ` [PATCH 0/6] x86/microcode: Support for Intel Staging Feature Chang S. Bae
2024-12-11 1:42 ` [PATCH 1/6] x86/microcode: Introduce staging option to reduce late-loading latency Chang S. Bae
2025-02-17 13:33 ` Borislav Petkov
2025-02-18 7:51 ` Chang S. Bae
2025-02-18 11:36 ` Borislav Petkov
2025-02-18 15:16 ` Dave Hansen [this message]
2024-12-11 1:42 ` [PATCH 2/6] x86/msr-index: Define MSR index and bit for the microcode staging feature Chang S. Bae
2025-02-26 17:19 ` Borislav Petkov
2024-12-11 1:42 ` [PATCH 3/6] x86/microcode/intel: Prepare for microcode staging Chang S. Bae
2025-02-26 17:52 ` Borislav Petkov
2024-12-11 1:42 ` [PATCH 4/6] x86/microcode/intel_staging: Implement staging logic Chang S. Bae
2025-02-18 20:16 ` Dave Hansen
2025-02-26 17:56 ` Borislav Petkov
2024-12-11 1:42 ` [PATCH 5/6] x86/microcode/intel_staging: Support mailbox data transfer Chang S. Bae
2025-02-18 20:54 ` Dave Hansen
2025-03-20 23:42 ` Chang S. Bae
2024-12-11 1:42 ` [PATCH 6/6] x86/microcode/intel: Enable staging when available Chang S. Bae
2025-02-07 18:37 ` [PATCH 0/6] x86/microcode: Support for Intel Staging Feature Chang S. Bae
2025-02-28 22:27 ` Colin Mitchell
2025-02-28 22:52 ` Borislav Petkov
2025-02-28 23:23 ` Dave Hansen
2025-03-26 21:29 ` Colin Mitchell
2025-04-02 17:14 ` Dave Hansen
2025-02-28 23:05 ` Dave Hansen
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