From: "Moger, Babu" <bmoger@amd.com>
To: Reinette Chatre <reinette.chatre@intel.com>,
Babu Moger <babu.moger@amd.com>,
tony.luck@intel.com, bp@alien8.de, ben.horgan@arm.com
Cc: corbet@lwn.net, skhan@linuxfoundation.org, rdunlap@infradead.org,
x86@kernel.org, Dave.Martin@arm.com, james.morse@arm.com,
tglx@kernel.org, mingo@redhat.com, dave.hansen@linux.intel.com,
hpa@zytor.com, fenghuay@nvidia.com, kas@kernel.org,
rick.p.edgecombe@intel.com, akpm@linux-foundation.org,
rppt@kernel.org, dapeng1.mi@linux.intel.com, elver@google.com,
enelsonmoore@gmail.com, jlayton@kernel.org, kuba@kernel.org,
ebiggers@kernel.org, seanjc@google.com, ewanhai-oc@zhaoxin.com,
binbin.wu@linux.intel.com, peterz@infradead.org,
ashish.kalra@amd.com, superm1@kernel.org,
chang.seok.bae@intel.com, prathyushi.nangia@amd.com,
kim.phillips@amd.com, ackerleytng@google.com,
elena.reshetova@intel.com, naveen@kernel.org,
darwi@linutronix.de, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev,
kvm@vger.kernel.org, eranian@google.com, peternewman@google.com
Subject: Re: [PATCH v6 08/18] x86/resctrl: Register RESCTRL_GLOBAL_ENABLE_PER_CPU when PLZA is available
Date: Fri, 16 Oct 2026 10:50:58 -0500 [thread overview]
Message-ID: <efe71c1b-00c4-46e3-8cfe-31020f6ff74d@amd.com> (raw)
In-Reply-To: <b3f44e74-dbb6-428d-a746-618b7288df5c@intel.com>
Hi Reinette,
On 10/15/2026 9:46 AM, Reinette Chatre wrote:
> Hi Babu,
>
> On 10/1/26 8:10 AM, Babu Moger wrote:
>> PLZA (Privilege Level Zero Association) provides the global per-CPU kernel
>> mode, RESCTRL_GLOBAL_ENABLE_PER_CPU, allowing kernel work to use allocation
>> and monitoring associations that differ from user tasks.
>>
>> Add x86 support for this kernel mode and make it available through the
>
> nit: This patch does not add any support, it just registers the mode
> with resctrl fs (as the subject already indicates). Didn't patch #5 already
> claim to add support?
Yes. Will change it to:
PLZA (Privilege Level Zero Association) provides the global per-CPU
kernel mode, RESCTRL_GLOBAL_ENABLE_PER_CPU, allowing kernel work to use
allocation and monitoring associations that differ from user tasks.
Register the PLZA kernel mode with the resctrl kernel mode
infrastructure so it can be exposed through the resctrl filesystem.
Thanks
Babu
next prev parent reply other threads:[~2026-10-16 15:51 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-01 15:10 [PATCH v6 00/18] x86,fs/resctrl: Add kernel-mode (e.g., PLZA) support to the resctrl subsystem Babu Moger
2026-10-01 15:10 ` [PATCH v6 01/18] x86/cpufeatures: Support Privilege Level Zero Association (PLZA) Babu Moger
2026-10-15 14:16 ` Reinette Chatre
2026-10-15 23:02 ` Babu Moger
2026-10-01 15:10 ` [PATCH v6 02/18] x86/resctrl: Add PLZA support to command-line options Babu Moger
2026-10-15 14:17 ` Reinette Chatre
2026-10-15 23:03 ` Babu Moger
2026-10-01 15:10 ` [PATCH v6 03/18] x86/resctrl: Add PLZA configuration definitions and data structures Babu Moger
2026-10-15 14:22 ` Reinette Chatre
2026-10-15 23:07 ` Babu Moger
2026-10-01 15:10 ` [PATCH v6 04/18] fs/resctrl: Introduce kernel mode enum Babu Moger
2026-10-15 14:44 ` Reinette Chatre
2026-10-15 23:09 ` Babu Moger
2026-10-01 15:10 ` [PATCH v6 05/18] x86,arm,fs/resctrl: Introduce architecture hook to program global kernel mode Babu Moger
2026-10-15 14:30 ` Reinette Chatre
2026-10-15 23:12 ` Moger, Babu
2026-10-01 15:10 ` [PATCH v6 06/18] fs/resctrl: Introduce kernel mode states for resctrl Babu Moger
2026-10-15 14:37 ` Reinette Chatre
2026-10-16 15:10 ` Moger, Babu
2026-10-01 15:10 ` [PATCH v6 07/18] fs/resctrl: Introduce resctrl_set_kmode_support() to register supported modes Babu Moger
2026-10-15 14:40 ` Reinette Chatre
2026-10-16 15:27 ` Moger, Babu
2026-10-01 15:10 ` [PATCH v6 08/18] x86/resctrl: Register RESCTRL_GLOBAL_ENABLE_PER_CPU when PLZA is available Babu Moger
2026-10-15 14:46 ` Reinette Chatre
2026-10-16 15:50 ` Moger, Babu [this message]
2026-10-01 15:10 ` [PATCH v6 09/18] fs/resctrl: Add interface to display kernel mode status Babu Moger
2026-10-15 15:16 ` Reinette Chatre
2026-10-16 19:10 ` Moger, Babu
2026-10-01 15:10 ` [PATCH v6 10/18] fs/resctrl: Add support for hidden resource group files Babu Moger
2026-10-15 15:27 ` Reinette Chatre
2026-10-16 20:53 ` Moger, Babu
2026-10-01 15:10 ` [PATCH v6 11/18] fs/resctrl: Introduce kmode_cpus/kmode_cpus_list per rdtgroup Babu Moger
2026-10-15 15:31 ` Reinette Chatre
2026-10-16 21:33 ` Moger, Babu
2026-10-01 15:10 ` [PATCH v6 12/18] fs/resctrl: Add CPU hotplug support for kernel mode associations Babu Moger
2026-10-15 15:33 ` Reinette Chatre
2026-10-16 22:21 ` Moger, Babu
2026-10-01 15:10 ` [PATCH v6 13/18] fs/resctrl: Deactivate kernel mode associations when a group is removed Babu Moger
2026-10-15 15:43 ` Reinette Chatre
2026-10-01 15:10 ` [PATCH v6 14/18] fs/resctrl: Control visibility of global per-CPU kernel mode group files Babu Moger
2026-10-15 15:46 ` Reinette Chatre
2026-10-01 15:10 ` [PATCH v6 15/18] fs/resctrl: Reject mode changes for groups backing kernel mode Babu Moger
2026-10-15 15:49 ` Reinette Chatre
2026-10-01 15:10 ` [PATCH v6 16/18] fs/resctrl: Add interface to modify kernel mode via info/kernel_mode Babu Moger
2026-10-15 16:07 ` Reinette Chatre
2026-10-01 15:10 ` [PATCH v6 17/18] fs/resctrl: Allow user space to write kmode_cpus/kmode_cpus_list Babu Moger
2026-10-01 15:10 ` [PATCH v6 18/18] fs/resctrl: Add kernel mode documentation and examples Babu Moger
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