From: Reinette Chatre <reinette.chatre@intel.com>
To: Chen Yu <yu.c.chen@intel.com>, <tony.luck@intel.com>
Cc: <tglx@kernel.org>, <bp@alien8.de>, <mingo@redhat.com>,
<dave.hansen@linux.intel.com>, <hpa@zytor.com>,
<fenghuay@nvidia.com>, <babu.moger@amd.com>,
<hongyu.ning@intel.com>, <chen.yu@linux.dev>, <x86@kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v8 2/9] x86/resctrl: Require 64-bit x86 for resctrl support
Date: Mon, 28 Sep 2026 14:21:40 -0700 [thread overview]
Message-ID: <71826bc0-df95-4f07-bd2f-dd8b4775802e@intel.com> (raw)
In-Reply-To: <711a7976e0a33cd6fa2872ff10898b66d34fcd70.1789705667.git.yu.c.chen@intel.com>
Hi Chenyu,
On 9/17/26 9:48 PM, Chen Yu wrote:
> From: Tony Luck <tony.luck@intel.com>
>
> Intel Application Energy Telemetry (AET) provides event counts in 64-bit
> registers in MMIO space. For accurate results these should be read with a
> single 64-bit load operation from the CPU.
>
> In preparation for the removal of the separate CONFIG_X86_CPU_RESCTRL_INTEL_AET
> configuration option, move the X86_64 dependency to X86_CPU_RESCTRL.
>
> This in line with Dave Hansen's proposal[1] for an addition to Linux
> documentation that details the state of 32-bit x86 support.
>
> Signed-off-by: Tony Luck <tony.luck@intel.com>
> Signed-off-by: Chen Yu <yu.c.chen@intel.com>
> Link: https://lore.kernel.org/all/c6ab0c24-8931-4f0d-9be6-23498ab4c38b@intel.com/ # [1]
> ---
This patch is being submitted as part of two different series. That is ok
but the versions need to be consistent. To help with this I'll not add any
comments here but instead just point to most recent review:
https://lore.kernel.org/lkml/15de2e2f-fc2e-4d06-9179-100398865624@intel.com/
Reinette
next prev parent reply other threads:[~2026-09-28 21:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-18 4:46 [PATCH v8 0/9] Introduce MMIO-based CMT access for Enhanced RDT Chen Yu
2026-09-18 4:48 ` [PATCH v8 1/9] x86/topology: Export topo_lookup_cpuid() for resctrl use Chen Yu
2026-09-18 4:48 ` [PATCH v8 2/9] x86/resctrl: Require 64-bit x86 for resctrl support Chen Yu
2026-09-28 21:21 ` Reinette Chatre [this message]
2026-09-18 4:49 ` [PATCH v8 3/9] x86/resctrl: Parse ACPI ERDT table and save CACD cpumask for RMDD domains Chen Yu
2026-09-28 21:37 ` Reinette Chatre
2026-09-18 4:50 ` [PATCH v8 4/9] x86/resctrl: Attach ACPI ERDT information to L3 mon domain on CPU online Chen Yu
2026-09-28 21:44 ` Reinette Chatre
2026-09-18 4:50 ` [PATCH v8 5/9] x86/resctrl: Parse ACPI CMRC table Chen Yu
2026-09-28 21:46 ` Reinette Chatre
2026-09-18 4:50 ` [PATCH v8 6/9] x86/resctrl: Refactor the monitor read function Chen Yu
2026-09-18 4:50 ` [PATCH v8 7/9] fs/resctrl: Do not invoke smp_processor_id() in preemptible context Chen Yu
2026-09-28 21:48 ` Reinette Chatre
2026-09-18 4:51 ` [PATCH v8 8/9] x86/resctrl: Introduce erdt_cpu_has() and erdt_support() Chen Yu
2026-09-28 21:49 ` Reinette Chatre
2026-09-18 4:51 ` [PATCH v8 9/9] x86/resctrl: Add MMIO-based LLC occupancy monitoring support Chen Yu
2026-09-28 21:54 ` Reinette Chatre
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