Commit e39b82f6 authored by Zide Chen's avatar Zide Chen Committed by Peter Zijlstra
Browse files

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: default avatarZhenyu Wang <zhenyuw.linux@gmail.com>
Signed-off-by: default avatarZide Chen <zide.chen@intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarKan Liang <kan.liang@linux.intel.com>
Reviewed-by: default avatarDapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://patch.msgid.link/20251023223754.1743928-2-zide.chen@intel.com
parent 45e1dccc

arch/x86/events/intel/cstate.c

+1 −0
Original line number Diff line number Diff line
@@ -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),