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authorXiaoyao Li <xiaoyao.li@intel.com>2021-08-24 06:06:22 +0200
committerPeter Zijlstra <peterz@infradead.org>2021-08-25 15:42:31 +0200
commitc53c6b7409f4cd9e542991b53d597fbe2751d7db (patch)
tree790987a75c7b3989f8d0f1c3cbf885055503db0f
parentLinux 5.14-rc7 (diff)
downloadlinux-c53c6b7409f4cd9e542991b53d597fbe2751d7db.tar.xz
linux-c53c6b7409f4cd9e542991b53d597fbe2751d7db.zip
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 <xiaoyao.li@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Link: https://lkml.kernel.org/r/20210824040622.4081502-1-xiaoyao.li@intel.com
-rw-r--r--arch/x86/events/intel/pt.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index 915847655c06..b044577785bb 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),