Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

perf/x86/intel/cstate: Add Clearwater Forest support 

Clearwater Forest is based on the Darkmont Atom microarchitecture.
>From the perspective of C-state residency profiling, it supports the
same residency counters as Sierra Forest: CC1/CC6, PC2/PC6, and MC6.

Please note that the C1E residency counter can only be read via PMT,
not MSR. Therefore, tools relying on the perf_event framework cannot
access the C1E residency.

Signed-off-by: Zhenyu Wang <zhenyuw.linux@gmail.com>
Signed-off-by: Zide Chen <zide.chen@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://patch.msgid.link/20251023223754.1743928-2-zide.chen@intel.com
This commit is contained in:
Zide Chen 2025-10-23 15:37:51 -07:00 committed by Peter Zijlstra
parent 45e1dccc06
commit e39b82f6cb
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/events/intel/cstate.c
View File

@ -628,6 +628,7 @@ static const struct x86_cpu_id intel_cstates_match[] __initconst = {
X86_MATCH_VFM(INTEL_ATOM_GRACEMONT, &adl_cstates),
X86_MATCH_VFM(INTEL_ATOM_CRESTMONT_X, &srf_cstates),
X86_MATCH_VFM(INTEL_ATOM_CRESTMONT, &grr_cstates),
X86_MATCH_VFM(INTEL_ATOM_DARKMONT_X, &srf_cstates),
X86_MATCH_VFM(INTEL_ICELAKE_L, &icl_cstates),
X86_MATCH_VFM(INTEL_ICELAKE, &icl_cstates),