From 90d6e099063df309edcf99ab5372f69a668f1989 Mon Sep 17 00:00:00 2001 From: Xiaoyao Li Date: Tue, 24 Aug 2021 12:06:22 +0800 Subject: [PATCH] perf/x86/intel/pt: Fix mask of num_address_ranges Per SDM, bit 2:0 of CPUID(0x14,1).EAX[2:0] reports the number of configurable address ranges for filtering, not bit 1:0. Signed-off-by: Xiaoyao Li Signed-off-by: Peter Zijlstra (Intel) Acked-by: Alexander Shishkin Link: https://lkml.kernel.org/r/20210824040622.4081502-1-xiaoyao.li@intel.com --- arch/x86/events/intel/pt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c index 915847655c065..b044577785bbb 100644 --- a/arch/x86/events/intel/pt.c +++ b/arch/x86/events/intel/pt.c @@ -62,7 +62,7 @@ static struct pt_cap_desc { PT_CAP(single_range_output, 0, CPUID_ECX, BIT(2)), PT_CAP(output_subsys, 0, CPUID_ECX, BIT(3)), PT_CAP(payloads_lip, 0, CPUID_ECX, BIT(31)), - PT_CAP(num_address_ranges, 1, CPUID_EAX, 0x3), + PT_CAP(num_address_ranges, 1, CPUID_EAX, 0x7), PT_CAP(mtc_periods, 1, CPUID_EAX, 0xffff0000), PT_CAP(cycle_thresholds, 1, CPUID_EBX, 0xffff), PT_CAP(psb_periods, 1, CPUID_EBX, 0xffff0000), -- 2.39.5