linux-kernel - [tip: perf/urgent] perf/x86/intel/pt: Fix mask of num_address

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Thu, 26 Aug 2021 06:56:42 -0000
From:   "tip-bot2 for Xiaoyao Li" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Xiaoyao Li <xiaoyao.li@...el.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: perf/urgent] perf/x86/intel/pt: Fix mask of num_address_ranges

The following commit has been merged into the perf/urgent branch of tip:

Commit-ID:     c53c6b7409f4cd9e542991b53d597fbe2751d7db
Gitweb:        https://git.kernel.org/tip/c53c6b7409f4cd9e542991b53d597fbe2751d7db
Author:        Xiaoyao Li <xiaoyao.li@...el.com>
AuthorDate:    Tue, 24 Aug 2021 12:06:22 +08:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 25 Aug 2021 15:42:31 +02:00

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@...el.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
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 9158476..b044577 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),