From: Masayoshi Mizuma <msys.mizuma@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Baoquan He <bhe@redhat.com>
Cc: Masayoshi Mizuma <msys.mizuma@gmail.com>,
Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v4 3/3] docs: kernel-parameters.txt: document rand_mem_physical_padding parameter
Date: Thu, 27 Sep 2018 16:31:46 -0400 [thread overview]
Message-ID: <20180927203146.12201-4-msys.mizuma@gmail.com> (raw)
In-Reply-To: <20180927203146.12201-1-msys.mizuma@gmail.com>
From: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
This kernel parameter allows to change the padding used
for the physical memory mapping section when KASLR
memory is enabled.
For memory hotplug capable systems, the default padding size,
CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING, may not be enough.
The option is useful to adjust the padding size.
Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
---
Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 92eb1f4..de43cdf 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3529,6 +3529,13 @@
fully seed the kernel's CRNG. Default is controlled
by CONFIG_RANDOM_TRUST_CPU.
+ rand_mem_physical_padding=
+ [KNL] Define the padding size in terabytes
+ used for the physical memory mapping section
+ when KASLR memory is enabled.
+ The default value is
+ CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING.
+
ras=option[,option,...] [KNL] RAS-specific options
cec_disable [X86]
--
2.18.0
next prev parent reply other threads:[~2018-09-27 20:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-27 20:31 [PATCH v4 0/3] Add a kernel parameter to change the padding size for KASLR Masayoshi Mizuma
2018-09-27 20:31 ` [PATCH v4 1/3] x86/mm: Add a kernel parameter to change the padding used for the physical memory mapping Masayoshi Mizuma
2018-09-27 20:31 ` [PATCH v4 2/3] ACPI / NUMA: Add warning message if the padding size for KASLR is not enough Masayoshi Mizuma
2018-09-27 21:14 ` Borislav Petkov
2018-09-28 2:21 ` Masayoshi Mizuma
2018-09-28 2:48 ` Baoquan He
2018-09-28 14:26 ` Masayoshi Mizuma
2018-09-27 20:31 ` Masayoshi Mizuma [this message]
2018-09-27 21:17 ` [PATCH v4 3/3] docs: kernel-parameters.txt: document rand_mem_physical_padding parameter Borislav Petkov
2018-09-28 2:26 ` Masayoshi Mizuma
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