From: "Luck, Tony" <tony.luck@intel.com>
To: Reinette Chatre <reinette.chatre@intel.com>
Cc: Ben Horgan <ben.horgan@arm.com>, "Moger, Babu" <bmoger@amd.com>,
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Subject: Re: [RFC PATCH 13/19] x86/resctrl: Add PLZA state tracking and context switch handling
Date: Thu, 19 Feb 2026 09:03:20 -0800 [thread overview]
Message-ID: <aZdCWCTDa777gfC9@agluck-desk3> (raw)
In-Reply-To: <aZXsihgl0B-o1DI6@agluck-desk3>
> Likely real implementation:
>
> Sub-components of each of the ideas above are encoded as a bitmask that
> is written to plza_mode. There is a file in the info/ directory listing
> which bits are supported on the current system (e.g. the "keep the same
> RMID" mode may be impractical on ARM, so it would not be listed as an
> option.)
In x86 terms where control and monitor functions are independent we
have:
Control:
1) Use default (CLOSID==0) for kernel
2) Allocate just one CLOSID for kernel
3) Allocate many CLOSIDs for kernel
Monitor:
1) Do not monitor kernel separately from user
2) Use default (RMID==0) for kernel
3) Allocate one RMID for kernel
4) Allocate many RMIDs for kernel
What options are possible on ARM & RISC-V?
-Tony
next prev parent reply other threads:[~2026-02-19 17:03 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-21 21:12 [RFC PATCH 00/19] x86,fs/resctrl: Support for Global Bandwidth Enforcement and Priviledge Level Zero Association Babu Moger
2026-01-21 21:12 ` [RFC PATCH 01/19] x86,fs/resctrl: Add support for Global Bandwidth Enforcement (GLBE) Babu Moger
2026-02-09 18:44 ` Reinette Chatre
2026-02-11 1:07 ` Moger, Babu
2026-02-11 16:54 ` Reinette Chatre
2026-02-11 21:18 ` Babu Moger
2026-02-12 3:51 ` Reinette Chatre
2026-02-12 19:09 ` Babu Moger
2026-02-13 0:05 ` Reinette Chatre
2026-02-13 1:51 ` Moger, Babu
2026-02-13 16:17 ` Reinette Chatre
2026-02-13 23:14 ` Moger, Babu
2026-02-14 0:01 ` Reinette Chatre
2026-02-16 16:05 ` Babu Moger
2026-02-20 10:07 ` Ben Horgan
2026-02-20 18:39 ` Reinette Chatre
2026-02-23 9:29 ` Ben Horgan
2026-02-21 0:12 ` Moger, Babu
2026-02-23 13:21 ` Fenghua Yu
2026-02-23 17:38 ` Reinette Chatre
2026-02-23 13:21 ` Fenghua Yu
2026-01-21 21:12 ` [RFC PATCH 02/19] x86,fs/resctrl: Add the resource for Global Memory Bandwidth Allocation Babu Moger
2026-01-21 21:12 ` [RFC PATCH 03/19] fs/resctrl: Add new interface max_bandwidth Babu Moger
2026-02-06 23:58 ` Reinette Chatre
2026-02-09 23:52 ` Moger, Babu
2026-01-21 21:12 ` [RFC PATCH 04/19] fs/resctrl: Add the documentation for Global Memory Bandwidth Allocation Babu Moger
2026-02-03 0:00 ` Luck, Tony
2026-02-03 16:38 ` Babu Moger
2026-02-09 16:32 ` Reinette Chatre
2026-02-10 19:44 ` Babu Moger
2026-01-21 21:12 ` [RFC PATCH 05/19] x86,fs/resctrl: Add support for Global Slow Memory Bandwidth Allocation (GSMBA) Babu Moger
2026-01-21 21:12 ` [RFC PATCH 06/19] x86,fs/resctrl: Add the resource for Global Slow Memory Bandwidth Enforcement(GLSBE) Babu Moger
2026-01-21 21:12 ` [RFC PATCH 07/19] fs/resctrl: Add the documentation for Global Slow Memory Bandwidth Allocation Babu Moger
2026-01-21 21:12 ` [RFC PATCH 08/19] x86/resctrl: Support Privilege-Level Zero Association (PLZA) Babu Moger
2026-01-21 21:12 ` [RFC PATCH 09/19] x86/resctrl: Add plza_capable in rdt_resource data structure Babu Moger
2026-02-11 15:19 ` Ben Horgan
2026-02-11 16:54 ` Reinette Chatre
2026-02-11 17:48 ` Ben Horgan
2026-02-13 15:50 ` Moger, Babu
2026-01-21 21:12 ` [RFC PATCH 10/19] fs/resctrl: Expose plza_capable via control info file Babu Moger
2026-01-21 21:12 ` [RFC PATCH 11/19] resctrl: Introduce PLZA static key enable/disable helpers Babu Moger
2026-01-21 21:12 ` [RFC PATCH 12/19] x86/resctrl: Add data structures and definitions for PLZA configuration Babu Moger
2026-01-21 21:12 ` [RFC PATCH 13/19] x86/resctrl: Add PLZA state tracking and context switch handling Babu Moger
2026-01-27 22:30 ` Luck, Tony
2026-01-28 16:01 ` Moger, Babu
2026-01-28 17:12 ` Luck, Tony
2026-01-28 17:41 ` Moger, Babu
2026-01-28 17:44 ` Moger, Babu
2026-01-28 19:17 ` Luck, Tony
2026-02-10 16:17 ` Reinette Chatre
2026-02-10 18:04 ` Reinette Chatre
2026-02-11 16:40 ` Ben Horgan
2026-02-11 19:46 ` Luck, Tony
2026-02-11 22:22 ` Reinette Chatre
2026-02-12 13:55 ` Ben Horgan
2026-02-12 18:37 ` Reinette Chatre
2026-02-16 15:18 ` Ben Horgan
2026-02-17 18:51 ` Reinette Chatre
2026-02-17 21:44 ` Luck, Tony
2026-02-17 22:37 ` Reinette Chatre
2026-02-17 22:52 ` Luck, Tony
2026-02-17 23:55 ` Reinette Chatre
2026-02-18 16:44 ` Luck, Tony
2026-02-19 17:03 ` Luck, Tony [this message]
2026-02-19 17:45 ` Ben Horgan
2026-02-20 8:21 ` Drew Fustini
2026-02-19 17:33 ` Ben Horgan
2026-02-20 2:53 ` Reinette Chatre
2026-02-20 22:44 ` Moger, Babu
2026-02-23 17:12 ` Reinette Chatre
2026-02-23 22:35 ` Moger, Babu
2026-02-23 23:13 ` Reinette Chatre
2026-02-24 19:37 ` Babu Moger
2026-02-23 10:08 ` Ben Horgan
2026-02-23 16:38 ` Reinette Chatre
2026-02-24 9:36 ` Ben Horgan
2026-02-24 16:13 ` Reinette Chatre
2026-02-19 11:06 ` Ben Horgan
2026-02-19 18:12 ` Luck, Tony
2026-02-19 18:36 ` Reinette Chatre
2026-02-19 10:21 ` Ben Horgan
2026-02-19 18:14 ` Reinette Chatre
2026-02-23 9:48 ` Ben Horgan
2026-02-13 16:37 ` Moger, Babu
2026-02-13 17:02 ` Luck, Tony
2026-02-16 19:24 ` Babu Moger
2026-02-14 0:10 ` Reinette Chatre
2026-02-16 15:41 ` Ben Horgan
2026-02-16 22:52 ` Moger, Babu
2026-02-17 15:56 ` Ben Horgan
2026-02-17 16:38 ` Babu Moger
2026-02-18 9:54 ` Ben Horgan
2026-02-18 6:22 ` Stephane Eranian
2026-02-18 9:35 ` Ben Horgan
2026-02-19 10:27 ` Ben Horgan
2026-02-16 22:36 ` Moger, Babu
2026-02-12 10:00 ` Ben Horgan
2026-01-21 21:12 ` [RFC PATCH 14/19] x86,fs/resctrl: Add the functionality to configure PLZA Babu Moger
2026-01-29 19:13 ` Luck, Tony
2026-01-29 19:53 ` Babu Moger
2026-01-21 21:12 ` [RFC PATCH 15/19] fs/resctrl: Introduce PLZA attribute in rdtgroup interface Babu Moger
2026-01-21 21:12 ` [RFC PATCH 16/19] fs/resctrl: Implement rdtgroup_plza_write() to configure PLZA in a group Babu Moger
2026-01-28 22:03 ` Luck, Tony
2026-01-29 18:54 ` Luck, Tony
2026-01-29 19:31 ` Babu Moger
2026-01-29 19:42 ` Babu Moger
2026-02-10 0:05 ` Reinette Chatre
2026-02-11 23:10 ` Moger, Babu
2026-01-21 21:12 ` [RFC PATCH 17/19] fs/resctrl: Update PLZA configuration when cpu_mask changes Babu Moger
2026-01-21 21:12 ` [RFC PATCH 18/19] x86/resctrl: Refactor show_rdt_tasks() to support PLZA task matching Babu Moger
2026-01-21 21:12 ` [RFC PATCH 19/19] fs/resctrl: Add per-task PLZA enable support via rdtgroup Babu Moger
2026-02-03 19:58 ` [RFC PATCH 00/19] x86,fs/resctrl: Support for Global Bandwidth Enforcement and Priviledge Level Zero Association Luck, Tony
2026-02-10 0:27 ` Reinette Chatre
2026-02-11 0:40 ` Drew Fustini
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