diff mbox series

[5.10,17/29] perf/x86/intel/pt: Fix mask of num_address_ranges

Message ID 20210906125450.358827163@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH Sept. 6, 2021, 12:55 p.m. UTC 
From: Xiaoyao Li <xiaoyao.li@intel.com>

[ Upstream commit c53c6b7409f4cd9e542991b53d597fbe2751d7db ]

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
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/events/intel/pt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index e94af4a54d0d..37129b76135a 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),