From: Mario Limonciello <mario.limonciello@amd.com>
To: Borislav Petkov <bp@alien8.de>
Cc: "Hans de Goede" <hdegoede@redhat.com>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
x86@kernel.org, "Gautham R . Shenoy" <gautham.shenoy@amd.com>,
"Perry Yuan" <perry.yuan@amd.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-pm@vger.kernel.org, platform-driver-x86@vger.kernel.org,
"Shyam Sundar S K" <Shyam-sundar.S-k@amd.com>
Subject: Re: [PATCH v3 03/14] x86/cpufeatures: add X86_FEATURE_WORKLOAD_CLASS feature bit
Date: Tue, 22 Oct 2024 08:03:21 -0500 [thread overview]
Message-ID: <5247ada7-78f1-49e3-8076-cd85386126d8@amd.com> (raw)
In-Reply-To: <20241022124202.GHZxedmqPeFd5F3sL3@fat_crate.local>
On 10/22/2024 07:42, Borislav Petkov wrote:
> On Tue, Oct 15, 2024 at 04:36:34PM -0500, Mario Limonciello wrote:
>> From: Perry Yuan <perry.yuan@amd.com>
>>
>> Add new feature bit that indicates support for workload based
>> heuristic feedback to OS for scheduling decisions.
>> When the bit set, threads are classified during runtime into
>> enumerated classes. The classes represent thread performance/power
>> characteristics that may benefit from special scheduling behaviors.
>>
>> Signed-off-by: Perry Yuan <perry.yuan@amd.com>
>> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
>> ---
>> arch/x86/include/asm/cpufeatures.h | 1 +
>> arch/x86/kernel/cpu/scattered.c | 1 +
>> 2 files changed, 2 insertions(+)
>>
>> diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
>> index cea1ed82aeb4..3e8e67b8ec7a 100644
>> --- a/arch/x86/include/asm/cpufeatures.h
>> +++ b/arch/x86/include/asm/cpufeatures.h
>> @@ -474,6 +474,7 @@
>> #define X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT (21*32+ 4) /* Clear branch history at vmexit using SW loop */
>> #define X86_FEATURE_FAST_CPPC (21*32 + 5) /* AMD Fast CPPC */
>> #define X86_FEATURE_HETERO_CORE_TOPOLOGY (21*32 + 6) /* Heterogeneous Core Topology */
>> +#define X86_FEATURE_WORKLOAD_CLASS (21*32 + 7) /* Workload Classification */
>
> As already discussed: X86_FEATURE_AMD_WORKLOAD_CLASS
>
Yes; v4 does this.
https://lore.kernel.org/linux-pm/20241021180252.3531-4-mario.limonciello@amd.com/T/#u
next prev parent reply other threads:[~2024-10-22 13:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-15 21:36 [PATCH v3 00/14] Add support for AMD hardware feedback interface Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 01/14] Documentation: x86: Add AMD Hardware Feedback Interface documentation Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 02/14] MAINTAINERS: Add maintainer entry for AMD Hardware Feedback Driver Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 03/14] x86/cpufeatures: add X86_FEATURE_WORKLOAD_CLASS feature bit Mario Limonciello
2024-10-17 4:47 ` Gautham R. Shenoy
2024-10-22 12:42 ` Borislav Petkov
2024-10-22 13:03 ` Mario Limonciello [this message]
2024-10-15 21:36 ` [PATCH v3 04/14] x86/msr-index: define AMD heterogeneous CPU related MSR Mario Limonciello
2024-10-17 4:48 ` Gautham R. Shenoy
2024-10-15 21:36 ` [PATCH v3 05/14] platform/x86: hfi: Introduce AMD Hardware Feedback Interface Driver Mario Limonciello
2024-10-17 6:07 ` Gautham R. Shenoy
2024-10-15 21:36 ` [PATCH v3 06/14] platform/x86: hfi: parse CPU core ranking data from shared memory Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 07/14] platform/x86: hfi: init per-cpu scores for each class Mario Limonciello
2024-10-17 5:52 ` Gautham R. Shenoy
2024-10-15 21:36 ` [PATCH v3 08/14] platform/x86: hfi: add online and offline callback support Mario Limonciello
2024-10-16 12:42 ` Ilpo Järvinen
2024-10-15 21:36 ` [PATCH v3 09/14] platform/x86: hfi: add power management callback Mario Limonciello
2024-10-17 6:00 ` Gautham R. Shenoy
2024-10-17 19:27 ` Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 10/14] x86/cpu: Enable SD_ASYM_PACKING for DIE Domain on AMD Processors Mario Limonciello
2024-10-17 6:06 ` Gautham R. Shenoy
2024-10-15 21:36 ` [PATCH v3 11/14] x86/process: Clear hardware feedback history for AMD processors Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 12/14] cpufreq/amd-pstate: Disable preferred cores on designs with workload classification Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 13/14] platform/x86/amd: hfi: Set ITMT priority from ranking data Mario Limonciello
2024-10-15 21:36 ` [PATCH v3 14/14] platform/x86: hfi: Add debugfs support Mario Limonciello
2024-10-16 12:38 ` Ilpo Järvinen
2024-10-16 16:09 ` Mario Limonciello
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