c733ebb7cb
A recent bug report outlined that the way GICv4.1 is handled across kexec is pretty bad. We can end-up in a situation where ITSs share memory (this is the case when SVPET==1) and reprogram the base registers, creating a situation where ITSs that are part of a given affinity group see different pointers. Which is illegal. Boo. In order to restore some sanity, reset the BASERn registers to 0 *before* probing any ITS. Although this isn't optimised at all, this is only a once-per-boot cost, which shouldn't show up on anyone's radar. Cc: Jay Chen <jkchen@linux.alibaba.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Link: https://lore.kernel.org/r/20211216190315.GA14220@lpieralisi Link: https://lore.kernel.org/r/20220124133809.1291195-1-maz@kernel.org |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .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.
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.