linux-kernel - [PATCH v3 06/12] mce, x86: Enable persistent events

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

Message-Id: <1377180807-12758-7-git-send-email-rric@kernel.org>
Date:	Thu, 22 Aug 2013 16:13:21 +0200
From:	Robert Richter <rric@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Borislav Petkov <bp@...en8.de>, Jiri Olsa <jolsa@...hat.com>,
	linux-kernel@...r.kernel.org, Borislav Petkov <bp@...e.de>,
	Robert Richter <rric@...nel.org>
Subject: [PATCH v3 06/12] mce, x86: Enable persistent events

From: Borislav Petkov <bp@...e.de>

... for MCEs collection.

Signed-off-by: Borislav Petkov <bp@...e.de>
[ rric: Fix build error for no-tracepoints configs ]
[ rric: Return proper error code. ]
[ rric: No error message if perf is disabled. ]
Signed-off-by: Robert Richter <rric@...nel.org>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 87a65c9..ffa227b 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1990,6 +1990,25 @@ int __init mcheck_init(void)
 	return 0;
 }
 
+#ifdef CONFIG_EVENT_TRACING
+
+int __init mcheck_init_tp(void)
+{
+	int ret = perf_add_persistent_tp(&event_mce_record);
+
+	if (ret && ret != -ENOENT)
+		pr_err("Error adding MCE persistent event: %d\n", ret);
+
+	return ret;
+}
+/*
+ * We can't run earlier because persistent events uses anon_inode_getfile and
+ * its anon_inode_mnt gets initialized as a fs_initcall.
+ */
+fs_initcall_sync(mcheck_init_tp);
+
+#endif /* CONFIG_EVENT_TRACING */
+
 /*
  * mce_syscore: PM support
  */
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/