mirror of
https://github.com/torvalds/linux.git
synced 2026-08-02 05:12:01 +02:00
Linux kernel source tree
ccac969772
When protected mode is enabled, the host is unable to access most parts of the EL2 hypervisor image, including 'hyp_physvirt_offset' and the contents of the hypervisor's '.rodata.str' section. Unfortunately, nvhe_hyp_panic_handler() tries to read from both of these locations when handling a BUG() triggered at EL2; the former for converting the ELR to a physical address and the latter for displaying the name of the source file where the BUG() occurred. Hack the EL2 panic asm to pass both physical and virtual ELR values to the host and utilise the newly introduced CONFIG_NVHE_EL2_DEBUG so that we disable stage-2 protection for the host before returning to the EL1 panic handler. If the debug option is not enabled, display the address instead of the source file:line information. Cc: Andrew Scull <ascull@google.com> Cc: Quentin Perret <qperret@google.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210813130336.8139-1-will@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.