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Oliver Upton 821d935c87 KVM: arm64: Introduce support for userspace SMCCC filtering
As the SMCCC (and related specifications) march towards an 'everything
and the kitchen sink' interface for interacting with a system it becomes
less likely that KVM will support every related feature. We could do
better by letting userspace have a crack at it instead.

Allow userspace to define an 'SMCCC filter' that applies to both HVCs
and SMCs initiated by the guest. Supporting both conduits with this
interface is important for a couple of reasons. Guest SMC usage is table
stakes for a nested guest, as HVCs are always taken to the virtual EL2.
Additionally, guests may want to interact with a service on the secure
side which can now be proxied by userspace.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230404154050.2270077-10-oliver.upton@linux.dev
2023-04-05 12:07:41 +01:00
arch KVM: arm64: Introduce support for userspace SMCCC filtering 2023-04-05 12:07:41 +01:00
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Documentation KVM: arm64: Introduce support for userspace SMCCC filtering 2023-04-05 12:07:41 +01:00
drivers TTY/Serial driver fixes for 6.3-rc3 2023-03-19 10:09:58 -07:00
fs Fix a double unlock bug on an error path in ext4, found by smatch and 2023-03-19 09:38:26 -07:00
include KVM: arm64: Introduce support for userspace SMCCC filtering 2023-04-05 12:07:41 +01:00
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kernel Tracing fixes for 6.3: 2023-03-19 10:46:02 -07:00
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MAINTAINERS fbdev updates for kernel 6.3-rc3: 2023-03-18 16:01:34 -07:00
Makefile Linux 6.3-rc3 2023-03-19 13:27:55 -07:00
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.

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.