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| author | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2025-12-04 22:54:56 +0100 |
|---|---|---|
| committer | Thomas Hellström <thomas.hellstrom@linux.intel.com> | 2025-12-04 22:54:56 +0100 |
| commit | 3f1c07fc21c68bd3bd2df9d2c9441f6485e934d9 (patch) | |
| tree | 2bbe746323ca53170b1c6f18f67178021d5854f5 /arch/x86/kernel/cpu/resctrl/monitor.c | |
| parent | d72312d730450aab225a80bc84436757b85b08b5 (diff) | |
| parent | 0692602defb0c273f80dec9c564ca50726404aca (diff) | |
Merge drm/drm-next into drm-xe-next-fixes
Backmerging to be able do to a clean PR.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/cpu/resctrl/monitor.c')
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/monitor.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index 2cd25a0d4637..fe1a2aa53c16 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -458,7 +458,16 @@ int __init rdt_get_mon_l3_config(struct rdt_resource *r) r->mon.mbm_cfg_mask = ecx & MAX_EVT_CONFIG_BITS; } - if (rdt_cpu_has(X86_FEATURE_ABMC)) { + /* + * resctrl assumes a system that supports assignable counters can + * switch to "default" mode. Ensure that there is a "default" mode + * to switch to. This enforces a dependency between the independent + * X86_FEATURE_ABMC and X86_FEATURE_CQM_MBM_TOTAL/X86_FEATURE_CQM_MBM_LOCAL + * hardware features. + */ + if (rdt_cpu_has(X86_FEATURE_ABMC) && + (rdt_cpu_has(X86_FEATURE_CQM_MBM_TOTAL) || + rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL))) { r->mon.mbm_cntr_assignable = true; cpuid_count(0x80000020, 5, &eax, &ebx, &ecx, &edx); r->mon.num_mbm_cntrs = (ebx & GENMASK(15, 0)) + 1; |