Revision tags: v6.17-rc2 |
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8d2b0853 |
| 11-Aug-2025 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-fixes into drm-misc-fixes
Updating drm-misc-fixes to the state of v6.17-rc1. Begins a new release cycle.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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Revision tags: v6.17-rc1 |
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98e8f2c0 |
| 30-Jul-2025 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'x86-platform-2025-07-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform updates from Ingo Molnar: "This adds support for the AMD hardware feedback interface (
Merge tag 'x86-platform-2025-07-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform updates from Ingo Molnar: "This adds support for the AMD hardware feedback interface (HFI), by Perry Yuan"
* tag 'x86-platform-2025-07-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/itmt: Add debugfs file to show core priorities platform/x86/amd: hfi: Add debugfs support platform/x86/amd: hfi: Set ITMT priority from ranking data cpufreq/amd-pstate: Disable preferred cores on designs with workload classification x86/process: Clear hardware feedback history for AMD processors platform/x86: hfi: Add power management callback platform/x86: hfi: Add online and offline callback support platform/x86: hfi: Init per-cpu scores for each class platform/x86: hfi: Parse CPU core ranking data from shared memory platform/x86: hfi: Introduce AMD Hardware Feedback Interface Driver x86/msr-index: Add AMD workload classification MSRs MAINTAINERS: Add maintainer entry for AMD Hardware Feedback Driver Documentation/x86: Add AMD Hardware Feedback Interface documentation
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Revision tags: v6.16, v6.16-rc7, v6.16-rc6, v6.16-rc5, v6.16-rc4, v6.16-rc3, v6.16-rc2 |
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216fe0d7 |
| 09-Jun-2025 |
Mario Limonciello <mario.limonciello@amd.com> |
platform/x86/amd: hfi: Set ITMT priority from ranking data
The static ranking data that is read at module load should be used to set up the priorities for the cores relative to the performance value
platform/x86/amd: hfi: Set ITMT priority from ranking data
The static ranking data that is read at module load should be used to set up the priorities for the cores relative to the performance values.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/20250609200518.3616080-12-superm1@kernel.org
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5d902ee5 |
| 09-Jun-2025 |
Perry Yuan <Perry.Yuan@amd.com> |
platform/x86: hfi: Introduce AMD Hardware Feedback Interface Driver
The AMD Heterogeneous core design and Hardware Feedback Interface (HFI) provide behavioral classification and a dynamically update
platform/x86: hfi: Introduce AMD Hardware Feedback Interface Driver
The AMD Heterogeneous core design and Hardware Feedback Interface (HFI) provide behavioral classification and a dynamically updated ranking table for the scheduler to use when choosing cores for tasks.
There are two CPU core types defined: Classic and Dense. Classic cores are the standard performance cores, while Dense cores are optimized for area and efficiency.
Heterogeneous compute refers to CPU implementations that are comprised of more than one architectural class, each with two capabilities. This means each CPU reports two separate capabilities: "perf" and "eff".
Each capability lists all core ranking numbers between 0 and 255, where a higher number represents a higher capability.
Heterogeneous systems can also extend to more than two architectural classes.
The purpose of the scheduling feedback mechanism is to provide information to the operating system scheduler in real time, allowing the scheduler to direct threads to the optimal core during task scheduling.
All core ranking data are provided by the PMFW via a shared memory ranking table, which the driver reads and uses to update core capabilities to the scheduler. When the hardware updates the table, it generates a platform interrupt to notify the OS to read the new ranking table.
Signed-off-by: Perry Yuan <perry.yuan@amd.com> Co-developed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 Link: https://lore.kernel.org/20250609200518.3616080-5-superm1@kernel.org
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