From: Amit Daniel Kachhap <amit.kachhap@arm.com>
Date: Mon, 11 May 2020 13:01:56 +0000 (+0530)
Subject: Documentation/vmcoreinfo: Add documentation for 'KERNELPACMASK'
X-Git-Tag: v5.8-rc1~213^2~3^8
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=c0fc00ec6304a8e2e438ca1688b243815084dc50;p=users%2Fwilly%2Flinux.git

Documentation/vmcoreinfo: Add documentation for 'KERNELPACMASK'

Add documentation for KERNELPACMASK variable being added to the vmcoreinfo.

It indicates the PAC bits mask information of signed kernel pointers if
Armv8.3-A Pointer Authentication feature is present.

Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Link: https://lore.kernel.org/r/1589202116-18265-2-git-send-email-amit.kachhap@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
---

diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst
index 007a6b86e0ee..e4ee8b2db604 100644
--- a/Documentation/admin-guide/kdump/vmcoreinfo.rst
+++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst
@@ -393,6 +393,12 @@ KERNELOFFSET
 The kernel randomization offset. Used to compute the page offset. If
 KASLR is disabled, this value is zero.
 
+KERNELPACMASK
+-------------
+
+The mask to extract the Pointer Authentication Code from a kernel virtual
+address.
+
 arm
 ===