linux-kernel - [PATCH] x86/microcode: add parameter dis_ucode

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

Date:	Thu,  4 Sep 2014 12:07:06 -0700
From:	"Fenghua Yu" <fenghua.yu@...el.com>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Borislav Petkov" <bp@...en8.de>,
	"Henrique de Moraes Holschuh" <hmh@....eng.br>
Cc:	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"x86" <x86@...nel.org>, "Fenghua Yu" <fenghua.yu@...el.com>
Subject: [PATCH] x86/microcode: add parameter dis_ucode_ldr in kernel-paramenters.txt

From: Fenghua Yu <fenghua.yu@...el.com>

The kernel parameter dis_ucode_ldr disables early loading microcode from
initrd. The parameter was introduced earlier by Borislave Petkov.

This patch adds the explanation for this parameter in
Documentation/kernel-parameters.txt for user convenience.

Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
---
 Documentation/kernel-parameters.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 5ae8608..eef098f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -841,6 +841,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 	dhash_entries=	[KNL]
 			Set number of hash buckets for dentry cache.
 
+	dis_ucode_ldr	[X86]
+			This parameter disables the early microcode loader.
+			This is useful mostly in debugging situations where
+			we want to turn off early microcode loading from the
+			initrd, as a means to be able to rule out its
+			influence on the machine.
+
 	disable=	[IPV6]
 			See Documentation/networking/ipv6.txt.
 
-- 
1.8.1.2

--
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/