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Will Deacon 3f14b03dde arm64: mm: Map entry trampoline into trampoline and kernel page tables 
Commit 51a0048beb upstream.

The exception entry trampoline needs to be mapped at the same virtual
address in both the trampoline page table (which maps nothing else)
and also the kernel page table, so that we can swizzle TTBR1_EL1 on
exceptions from and return to EL0.

This patch maps the trampoline at a fixed virtual address in the fixmap
area of the kernel virtual address space, which allows the kernel proper
to be randomized with respect to the trampoline when KASLR is enabled.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2018-02-16 20:06:34 +01:00
arch arm64: mm: Map entry trampoline into trampoline and kernel page tables 2018-02-16 20:06:34 +01:00
block block: drain queue before waiting for q_usage_counter becoming zero 2018-01-05 09:09:48 -07:00
certs License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crypto crypto: tcrypt - fix S/G table for test_aead_speed() 2018-02-12 07:07:22 +01:00
Documentation x86/paravirt: Remove 'noreplace-paravirt' cmdline option 2018-02-07 11:14:13 -08:00
drivers media: hdpvr: Fix an error handling path in hdpvr_probe() 2018-02-16 20:06:32 +01:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs CIFS: zero sensitive data when freeing 2018-02-16 20:06:30 +01:00
include net_sched: get rid of rcu_barrier() in tcf_block_put_ext() 2018-02-12 07:07:21 +01:00
init Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-01-12 10:23:59 -08:00
ipc Rename superblock flags (MS_xyz -> SB_xyz) 2017-11-27 13:05:09 -08:00
kernel sched/rt: Up the root domain ref count when passing it around via IPIs 2018-02-16 20:06:32 +01:00
lib test_firmware: fix missing unlock on error in config_num_requests_store() 2018-02-03 17:58:43 +01:00
mm Revert "defer call to mem_cgroup_sk_alloc()" 2018-02-12 07:07:20 +01:00
net net: sched: fix use-after-free in tcf_block_put_ext 2018-02-12 07:07:21 +01:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2017-12-03 13:08:30 -05:00
scripts module/retpoline: Warn about missing retpoline in module 2018-02-07 11:14:06 -08:00
security ima/policy: fix parsing of fsuuid 2018-02-03 17:58:35 +01:00
sound ASoC: pcm512x: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE 2018-02-07 11:14:09 -08:00
tools objtool: Warn on stripped section symbol 2018-02-07 11:14:09 -08:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt KVM/ARM Fixes for v4.15, Round 3 (v2) 2018-01-17 14:59:27 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild misc updates for v4.15 2017-11-17 17:51:33 -08:00
.mailmap mailmap: update Mark Yao's email address 2018-01-04 16:45:09 -08:00
COPYING [PATCH] update FSF address in COPYING 2005-09-10 10:06:29 -07:00
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-01-28 12:19:23 -08:00
Makefile Linux 4.15.3 2018-02-12 07:07:23 +01:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.