linux-kernel - [PATCH] perf/x86/intel: use hexidecimal value for cpuid

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Date:   Wed,  8 Mar 2023 11:15:01 +0800
From:   Zhenyu Wang <zhenyuw@...ux.intel.com>
To:     linux-kernel@...r.kernel.org
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH] perf/x86/intel: use hexidecimal value for cpuid

It's easier to use hexidecimal value instead of decimal for reading
and following with SDM doc, also align with other cpuid calls.

Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Kan Liang <kan.liang@...ux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@...ux.intel.com>
---
 arch/x86/events/intel/core.c | 2 +-
 arch/x86/events/intel/lbr.c  | 2 +-
 arch/x86/events/intel/pt.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 14f0a746257d..5af084198c8f 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5903,7 +5903,7 @@ __init int intel_pmu_init(void)
 	 * Check whether the Architectural PerfMon supports
 	 * Branch Misses Retired hw_event or not.
 	 */
-	cpuid(10, &eax.full, &ebx.full, &fixed_mask, &edx.full);
+	cpuid(0xA, &eax.full, &ebx.full, &fixed_mask, &edx.full);
 	if (eax.split.mask_length < ARCH_PERFMON_EVENTS_COUNT)
 		return -ENODEV;
 
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c
index c3b0d15a9841..27048b7f23a0 100644
--- a/arch/x86/events/intel/lbr.c
+++ b/arch/x86/events/intel/lbr.c
@@ -1506,7 +1506,7 @@ void __init intel_pmu_arch_lbr_init(void)
 	u64 lbr_nr;
 
 	/* Arch LBR Capabilities */
-	cpuid(28, &eax.full, &ebx.full, &ecx.full, &unused_edx);
+	cpuid(0x1C, &eax.full, &ebx.full, &ecx.full, &unused_edx);
 
 	lbr_nr = fls(eax.split.lbr_depth_mask) * 8;
 	if (!lbr_nr)
diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index 42a55794004a..da3c5d748365 100644
--- a/arch/x86/events/intel/pt.c
+++ b/arch/x86/events/intel/pt.c
@@ -235,7 +235,7 @@ static int __init pt_pmu_hw_init(void)
 	}
 
 	for (i = 0; i < PT_CPUID_LEAVES; i++) {
-		cpuid_count(20, i,
+		cpuid_count(0x14, i,
 			    &pt_pmu.caps[CPUID_EAX + i*PT_CPUID_REGS_NUM],
 			    &pt_pmu.caps[CPUID_EBX + i*PT_CPUID_REGS_NUM],
 			    &pt_pmu.caps[CPUID_ECX + i*PT_CPUID_REGS_NUM],
-- 
2.39.2