From: Tony Luck <tony.luck@intel.com>
To: Fenghua Yu <fenghuay@nvidia.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>,
Peter Newman <peternewman@google.com>,
James Morse <james.morse@arm.com>,
Babu Moger <babu.moger@amd.com>,
Drew Fustini <dfustini@baylibre.com>,
Dave Martin <Dave.Martin@arm.com>, Chen Yu <yu.c.chen@intel.com>,
David E Box <david.e.box@intel.com>,
x86@kernel.org
Cc: Christoph Hellwig <hch@infradead.org>,
linux-kernel@vger.kernel.org, patches@lists.linux.dev,
Tony Luck <tony.luck@intel.com>
Subject: [PATCH v12 01/25] x86/cpufeatures: Add missing CQM feature dependency
Date: Wed, 16 Sep 2026 16:12:56 -0700 [thread overview]
Message-ID: <20260916231320.14502-2-tony.luck@intel.com> (raw)
In-Reply-To: <20260916231320.14502-1-tony.luck@intel.com>
The Intel Software Developer's Manual says that software must check that
CPUID(0x7,0x0).EBX[12] (Linux X86_FEATURE_CQM) is set before checking
for monitoring features in CPUID leaf 0xF.
Add the missing dependency of X86_FEATURE_CQM_LLC on X86_FEATURE_CQM.
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
v12:
Drop the X86_FEATURE renames. Just add the missing dependency.
---
arch/x86/kernel/cpu/cpuid-deps.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/cpu/cpuid-deps.c b/arch/x86/kernel/cpu/cpuid-deps.c
index 99801e844b30..93d45b688f6c 100644
--- a/arch/x86/kernel/cpu/cpuid-deps.c
+++ b/arch/x86/kernel/cpu/cpuid-deps.c
@@ -67,6 +67,7 @@ static const struct cpuid_dep cpuid_deps[] = {
{ X86_FEATURE_AVX512_4FMAPS, X86_FEATURE_AVX512F },
{ X86_FEATURE_AVX512_VPOPCNTDQ, X86_FEATURE_AVX512F },
{ X86_FEATURE_AVX512_VP2INTERSECT, X86_FEATURE_AVX512VL },
+ { X86_FEATURE_CQM_LLC, X86_FEATURE_CQM },
{ X86_FEATURE_CQM_OCCUP_LLC, X86_FEATURE_CQM_LLC },
{ X86_FEATURE_CQM_MBM_TOTAL, X86_FEATURE_CQM_LLC },
{ X86_FEATURE_CQM_MBM_LOCAL, X86_FEATURE_CQM_LLC },
--
2.55.0
next prev parent reply other threads:[~2026-09-16 23:13 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 23:12 [PATCH v12 00/25] Allow AET to use PMT as loadable module Tony Luck
2026-09-16 23:12 ` Tony Luck [this message]
2026-09-16 23:12 ` [PATCH v12 02/25] x86/resctrl: Check if monitoring features are supported Tony Luck
2026-09-16 23:12 ` [PATCH v12 03/25] x86/resctrl: Enumerate monitor features in rdt_get_l3_mon_config() Tony Luck
2026-09-16 23:12 ` [PATCH v12 04/25] x86/resctrl: Apply Intel MBM quirk from rdt_get_l3_mon_config() Tony Luck
2026-09-16 23:13 ` [PATCH v12 05/25] x86/resctrl: Delete resctrl_cpu_detect() Tony Luck
2026-09-16 23:13 ` [PATCH v12 06/25] arm,x86,fs/resctrl: Replace architecture resctrl_arch_{alloc,mon}_capable() Tony Luck
2026-09-16 23:13 ` [PATCH v12 07/25] x86/resctrl: Update special case for Intel Haswell enumeration Tony Luck
2026-09-16 23:13 ` [PATCH v12 08/25] x86/resctrl: Delete rdt_alloc_capable and rdt_mon_capable Tony Luck
2026-09-16 23:13 ` [PATCH v12 09/25] fs/resctrl: Remove redundant calls to resctrl_{alloc,mon}_capable() Tony Luck
2026-09-16 23:13 ` [PATCH v12 10/25] x86/resctrl: Honor rdt=perf option to force enable AET perf events Tony Luck
2026-09-16 23:13 ` [PATCH v12 11/25] fs/resctrl: Add interface to disable a monitor event Tony Luck
2026-09-16 23:13 ` [PATCH v12 12/25] arm,x86,fs/resctrl: Allocate maximum needed rmid_ptrs[] Tony Luck
2026-09-16 23:13 ` [PATCH v12 13/25] arm,x86,fs/resctrl: Allocate right size for L3 monitor arrays Tony Luck
2026-09-16 23:13 ` [PATCH v12 14/25] fs/resctrl: Rebuild free RMID list on each mount Tony Luck
2026-09-16 23:13 ` [PATCH v12 15/25] x86,fs/resctrl: Handle systems where AET is the only resource Tony Luck
2026-09-16 23:13 ` [PATCH v12 16/25] x86/resctrl: Add PMT registration API for AET enumeration callbacks Tony Luck
2026-09-16 23:13 ` [PATCH v12 17/25] platform/x86/intel/pmt: Register enumeration functions with resctrl Tony Luck
2026-09-16 23:13 ` [PATCH v12 18/25] x86/resctrl: Use registered function pointers for AET enumeration Tony Luck
2026-09-16 23:13 ` [PATCH v12 19/25] arm,x86,fs/resctrl: Enumerate AET on every resctrl mount Tony Luck
2026-09-16 23:13 ` [PATCH v12 20/25] x86/resctrl: Enforce system RMID limit on AET Tony Luck
2026-09-16 23:13 ` [PATCH v12 21/25] x86/resctrl: Export interface to report telemetry unbind/remove Tony Luck
2026-09-16 23:13 ` [PATCH v12 22/25] platform/x86/intel/pmt: Inform resctrl when MMIO maps are being removed Tony Luck
2026-09-16 23:13 ` [PATCH v12 23/25] x86/resctrl: Require 64-bit x86 for resctrl support Tony Luck
2026-09-16 23:13 ` [PATCH v12 24/25] x86/resctrl: Simplify Kconfig options for resctrl Tony Luck
2026-09-16 23:13 ` [PATCH v12 25/25] x86,fs/resctrl: Document telemetry mount timing caveat Tony Luck
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