@@ -6466,16 +6466,22 @@ __init int intel_pmu_init(void)
char *name;
struct x86_hybrid_pmu *pmu;
+ /* Architectural Perfmon was introduced starting with INTEL_CORE_YONAH */
if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
switch (boot_cpu_data.x86) {
- case 0x6:
- return p6_pmu_init();
- case 0xb:
+ case 6:
+ if (boot_cpu_data.x86_vfm < INTEL_CORE_YONAH)
+ return p6_pmu_init();
+ break;
+ case 11:
return knc_pmu_init();
- case 0xf:
+ case 15:
return p4_pmu_init();
+ default:
+ pr_cont("unsupported CPU family %d model %d ",
+ boot_cpu_data.x86, boot_cpu_data.x86_model);
+ return -ENODEV;
}
- return -ENODEV;
}
/*
@@ -2,6 +2,8 @@
#include <linux/perf_event.h>
#include <linux/types.h>
+#include <asm/cpu_device_id.h>
+
#include "../perf_event.h"
/*
@@ -248,30 +250,8 @@ __init int p6_pmu_init(void)
{
x86_pmu = p6_pmu;
- switch (boot_cpu_data.x86_model) {
- case 1: /* Pentium Pro */
+ if (boot_cpu_data.x86_vfm == INTEL_PENTIUM_PRO)
x86_add_quirk(p6_pmu_rdpmc_quirk);
- break;
-
- case 3: /* Pentium II - Klamath */
- case 5: /* Pentium II - Deschutes */
- case 6: /* Pentium II - Mendocino */
- break;
-
- case 7: /* Pentium III - Katmai */
- case 8: /* Pentium III - Coppermine */
- case 10: /* Pentium III Xeon */
- case 11: /* Pentium III - Tualatin */
- break;
-
- case 9: /* Pentium M - Banias */
- case 13: /* Pentium M - Dothan */
- break;
-
- default:
- pr_cont("unsupported p6 CPU model %d ", boot_cpu_data.x86_model);
- return -ENODEV;
- }
memcpy(hw_cache_event_ids, p6_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
Architectural Perfmon was introduced on the Family 6 "Core" processors starting with Yonah. Processors before Yonah need their own customized PMU initialization. p6_pmu_init() is expected to provide that initialization for early Family 6 processors. But, due to the unrestricted call to p6_pmu_init(), it could get called for any Family 6 processor if the architectural perfmon feature is disabled on that processor. To simplify, restrict the call to p6_pmu_init() to early Family 6 processors that do not have architectural perfmon support. As a result, the "unsupported" console print becomes practically unreachable because all the released P6 processors are covered by the switch cases. Move the console print to a common location where it can cover all modern processors that do not have architectural perfmon support. Also, use this opportunity to get rid of the unnecessary switch cases in p6_pmu_init(). Only the Pentium Pro processor needs a quirk, and the rest of the processors do not need any special handling. The gaps in the case numbers are only due to no processor with those model numbers being released. Converting to a VFM based check gets rid of one last few Intel x86_model comparisons. Signed-off-by: Sohil Mehta <sohil.mehta@intel.com> --- v3: Restrict calling p6_pmu_init() to only when needed. Move the console print to a common location. v2: No change. --- arch/x86/events/intel/core.c | 16 +++++++++++----- arch/x86/events/intel/p6.c | 26 +++----------------------- 2 files changed, 14 insertions(+), 28 deletions(-)