perf/x86/cstate: Add Comet Lake CPU support

Comet Lake is the new 10th Gen Intel processor. From the perspective of
Intel cstate residency counters, there is nothing changed compared with
Kaby Lake.

Share hswult_cstates with Kaby Lake.
Update the comments for Comet Lake.
Kaby Lake is missed in the comments for some Residency Counters. Update
the comments for Kaby Lake as well.

The External Design Specification (EDS) is not published yet. It comes
from an authoritative internal source.

The patch has been tested on real hardware.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1570549810-25049-5-git-send-email-kan.liang@linux.intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/events/intel/cstate.c

@@ -45,46 +45,48 @@
  *	MSR_CORE_C3_RESIDENCY: CORE C3 Residency Counter
  *			       perf code: 0x01
  *			       Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,GLM,
-						CNL
+ *						CNL,KBL,CML
  *			       Scope: Core
  *	MSR_CORE_C6_RESIDENCY: CORE C6 Residency Counter
  *			       perf code: 0x02
  *			       Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW,
- *						SKL,KNL,GLM,CNL
+ *						SKL,KNL,GLM,CNL,KBL,CML
  *			       Scope: Core
  *	MSR_CORE_C7_RESIDENCY: CORE C7 Residency Counter
  *			       perf code: 0x03
- *			       Available model: SNB,IVB,HSW,BDW,SKL,CNL
+ *			       Available model: SNB,IVB,HSW,BDW,SKL,CNL,KBL,CML
  *			       Scope: Core
  *	MSR_PKG_C2_RESIDENCY:  Package C2 Residency Counter.
  *			       perf code: 0x00
- *			       Available model: SNB,IVB,HSW,BDW,SKL,KNL,GLM,CNL
+ *			       Available model: SNB,IVB,HSW,BDW,SKL,KNL,GLM,CNL,
+ *						KBL,CML
  *			       Scope: Package (physical package)
  *	MSR_PKG_C3_RESIDENCY:  Package C3 Residency Counter.
  *			       perf code: 0x01
  *			       Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,KNL,
- *						GLM,CNL
+ *						GLM,CNL,KBL,CML
  *			       Scope: Package (physical package)
  *	MSR_PKG_C6_RESIDENCY:  Package C6 Residency Counter.
  *			       perf code: 0x02
  *			       Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW
- *						SKL,KNL,GLM,CNL
+ *						SKL,KNL,GLM,CNL,KBL,CML
  *			       Scope: Package (physical package)
  *	MSR_PKG_C7_RESIDENCY:  Package C7 Residency Counter.
  *			       perf code: 0x03
- *			       Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,CNL
+ *			       Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,CNL,
+ *						KBL,CML
  *			       Scope: Package (physical package)
  *	MSR_PKG_C8_RESIDENCY:  Package C8 Residency Counter.
  *			       perf code: 0x04
- *			       Available model: HSW ULT,KBL,CNL
+ *			       Available model: HSW ULT,KBL,CNL,CML
  *			       Scope: Package (physical package)
  *	MSR_PKG_C9_RESIDENCY:  Package C9 Residency Counter.
  *			       perf code: 0x05
- *			       Available model: HSW ULT,KBL,CNL
+ *			       Available model: HSW ULT,KBL,CNL,CML
  *			       Scope: Package (physical package)
  *	MSR_PKG_C10_RESIDENCY: Package C10 Residency Counter.
  *			       perf code: 0x06
- *			       Available model: HSW ULT,KBL,GLM,CNL
+ *			       Available model: HSW ULT,KBL,GLM,CNL,CML
  *			       Scope: Package (physical package)
  *
  */
@@ -614,6 +616,8 @@ static const struct x86_cpu_id intel_cstates_match[] __initconst = {
 
 	X86_CSTATES_MODEL(INTEL_FAM6_KABYLAKE_L, hswult_cstates),
 	X86_CSTATES_MODEL(INTEL_FAM6_KABYLAKE,   hswult_cstates),
+	X86_CSTATES_MODEL(INTEL_FAM6_COMETLAKE_L, hswult_cstates),
+	X86_CSTATES_MODEL(INTEL_FAM6_COMETLAKE, hswult_cstates),
 
 	X86_CSTATES_MODEL(INTEL_FAM6_CANNONLAKE_L, cnl_cstates),