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Marc Zyngier 2f6ea23f63 arm64: KVM: Avoid marking pages as XN in Stage-2 if CTR_EL0.DIC is set
On systems where CTR_EL0.DIC is set, we don't need to perform
icache invalidation to guarantee that we'll fetch the right
instruction stream.

This also means that taking a permission fault to invalidate the
icache is an unnecessary overhead.

On such systems, we can safely leave the page as being executable.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-07-09 11:37:42 +01:00
arch arm64: KVM: Avoid marking pages as XN in Stage-2 if CTR_EL0.DIC is set 2018-07-09 11:37:42 +01:00
block
certs
crypto
Documentation
drivers
firmware
fs
include
init
ipc
kernel
lib
LICENSES
mm
net
samples
scripts
security
sound
tools
usr
virt arm64: KVM: Add support for Stage-2 control of memory types and cacheability 2018-07-09 11:37:41 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile
README

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

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.