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Marc Zyngier 805357aa65 arm64: KVM: Add ARCH_WORKAROUND_2 support for guests 
commit 55e3748e89 upstream.

In order to offer ARCH_WORKAROUND_2 support to guests, we need
a bit of infrastructure.

Let's add a flag indicating whether or not the guest uses
SSBD mitigation. Depending on the state of this flag, allow
KVM to disable ARCH_WORKAROUND_2 before entering the guest,
and enable it when exiting it.

Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-22 14:28:51 +02:00
arch arm64: KVM: Add ARCH_WORKAROUND_2 support for guests 2018-07-22 14:28:51 +02:00
block
certs
crypto
Documentation arm64: Add 'ssbd' command-line option 2018-07-22 14:28:51 +02:00
drivers
firmware
fs
include arm64: Call ARCH_WORKAROUND_2 on transitions between EL0 and EL1 2018-07-22 14:28:50 +02:00
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt arm64: KVM: Add ARCH_WORKAROUND_2 support for guests 2018-07-22 14:28:51 +02:00
.cocciconfig
.get_maintainer.ignore
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README

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.