A relocatable kernel will relocate itself to pref_address if it is
loaded below pref_address. This means a booted kernel may be relocating
itself to an area with reserved memory on modern systems, potentially
clobbering arbitrary data that may be important to the system.
This is often the case, as the default value of PHYSICAL_START is
0x1000000 and kernels are typically loaded at 0x100000 or above by
bootloaders like iPXE or kexec. GRUB behaves like the approach
implemented here.
Also fixes the documentation around pref_address and PHYSICAL_START to
be accurate.
[ dhansen: changelog tweak ]
Co-developed-by: Cloud Hsu <cloudhsu@google.com>
Signed-off-by: Cloud Hsu <cloudhsu@google.com>
Signed-off-by: Chris Koch <chrisko@google.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Link: https://lore.kernel.org/all/20231215190521.3796022-1-chrisko%40google.com
- The minimum Sphinx requirement has been raised to 2.4.4, following a
warning that was added in 6.2.
- Some reworking of the Documentation/process front page to, hopefully,
make it more useful.
- Various kernel-doc tweaks to, for example, make it deal properly with
__counted_by annotations.
- We have also restored a warning for documentation of nonexistent
structure members that disappeared a while back. That had the delightful
consequence of adding some 600 warnings to the docs build. A sustained
effort by Randy, Vegard, and myself has addressed almost all of those,
bringing the documentation back into sync with the code. The fixes are
going through the appropriate maintainer trees.
- Various improvements to the HTML rendered docs, including automatic links
to Git revisions and a nice new pulldown to make translations easy to
access.
- Speaking of translations, more of those for Spanish and Chinese.
...plus the usual stream of documentation updates and typo fixes.
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Merge tag 'docs-6.8' of git://git.lwn.net/linux
Pull documentation update from Jonathan Corbet:
"Another moderately busy cycle for documentation, including:
- The minimum Sphinx requirement has been raised to 2.4.4, following
a warning that was added in 6.2
- Some reworking of the Documentation/process front page to,
hopefully, make it more useful
- Various kernel-doc tweaks to, for example, make it deal properly
with __counted_by annotations
- We have also restored a warning for documentation of nonexistent
structure members that disappeared a while back. That had the
delightful consequence of adding some 600 warnings to the docs
build. A sustained effort by Randy, Vegard, and myself has
addressed almost all of those, bringing the documentation back into
sync with the code. The fixes are going through the appropriate
maintainer trees
- Various improvements to the HTML rendered docs, including automatic
links to Git revisions and a nice new pulldown to make translations
easy to access
- Speaking of translations, more of those for Spanish and Chinese
... plus the usual stream of documentation updates and typo fixes"
* tag 'docs-6.8' of git://git.lwn.net/linux: (57 commits)
MAINTAINERS: use tabs for indent of CONFIDENTIAL COMPUTING THREAT MODEL
A reworked process/index.rst
ring-buffer/Documentation: Add documentation on buffer_percent file
Translated the RISC-V architecture boot documentation.
Docs: remove mentions of fdformat from util-linux
Docs/zh_CN: Fix the meaning of DEBUG to pr_debug()
Documentation: move driver-api/dcdbas to userspace-api/
Documentation: move driver-api/isapnp to userspace-api/
Documentation/core-api : fix typo in workqueue
Documentation/trace: Fixed typos in the ftrace FLAGS section
kernel-doc: handle a void function without producing a warning
scripts/get_abi.pl: ignore some temp files
docs: kernel_abi.py: fix command injection
scripts/get_abi: fix source path leak
CREDITS, MAINTAINERS, docs/process/howto: Update man-pages' maintainer
docs: translations: add translations links when they exist
kernel-doc: Align quick help and the code
MAINTAINERS: add reviewer for Spanish translations
docs: ignore __counted_by attribute in structure definitions
scripts: kernel-doc: Clarify missing struct member description
..
There aren't a ton of references to commits in the documentation, but
they do exist, and we can use automarkup to linkify them to make them
easier to follow.
Use something like this to find references to commits:
git grep -P 'commit.*[0-9a-f]{8,}' Documentation/
Also fix a few of these to standardize on the exact format that is
already used in changelogs.
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20231027115420.205279-1-vegard.nossum@oracle.com
The protocol version number note is between the protocol version table and
the memory layout section. As such, Sphinx renders the note directive not
only on the actual note, but until the end of doc.
Indent the directive so that only the actual protocol version number
note is rendered as such.
Fixes: 2c33c27fd6 ("x86/boot: Introduce kernel_info")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20231106101206.76487-2-bagasdotme@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
- Work from Carlos Bilbao to integrate rustdoc output into the generated
HTML documentation. This took some work to figure out how to do it
without slowing the docs build and without creating people who don't have
Rust installed, but Carlos got there.
- Move the loongarch and mips architecture documentation under
Documentation/arch/.
- Some more maintainer documentation from Jakub
...plus the usual assortment of updates, translations, and fixes.
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Merge tag 'docs-6.6' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"Documentation work keeps chugging along; this includes:
- Work from Carlos Bilbao to integrate rustdoc output into the
generated HTML documentation. This took some work to figure out how
to do it without slowing the docs build and without creating people
who don't have Rust installed, but Carlos got there
- Move the loongarch and mips architecture documentation under
Documentation/arch/
- Some more maintainer documentation from Jakub
... plus the usual assortment of updates, translations, and fixes"
* tag 'docs-6.6' of git://git.lwn.net/linux: (56 commits)
Docu: genericirq.rst: fix irq-example
input: docs: pxrc: remove reference to phoenix-sim
Documentation: serial-console: Fix literal block marker
docs/mm: remove references to hmm_mirror ops and clean typos
docs/zh_CN: correct regi_chg(),regi_add() to region_chg(),region_add()
Documentation: Fix typos
Documentation/ABI: Fix typos
scripts: kernel-doc: fix macro handling in enums
scripts: kernel-doc: parse DEFINE_DMA_UNMAP_[ADDR|LEN]
Documentation: riscv: Update boot image header since EFI stub is supported
Documentation: riscv: Add early boot document
Documentation: arm: Add bootargs to the table of added DT parameters
docs: kernel-parameters: Refer to the correct bitmap function
doc: update params of memhp_default_state=
docs: Add book to process/kernel-docs.rst
docs: sparse: fix invalid link addresses
docs: vfs: clean up after the iterate() removal
docs: Add a section on surveys to the researcher guidelines
docs: move mips under arch
docs: move loongarch under arch
...
Now that the EFI entry code in assembler is only used by the optional
and deprecated EFI handover protocol, and given that the EFI stub C code
no longer returns to it, most of it can simply be dropped.
While at it, clarify the symbol naming, by merging efi_main() and
efi_stub_entry(), making the latter the shared entry point for all
different boot modes that enter via the EFI stub.
The efi32_stub_entry() and efi64_stub_entry() names are referenced
explicitly by the tooling that populates the setup header, so these must
be retained, but can be emitted as aliases of efi_stub_entry() where
appropriate.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230807162720.545787-5-ardb@kernel.org
Move the x86 documentation under Documentation/arch/ as a way of cleaning
up the top-level directory and making the structure of our docs more
closely match the structure of the source directories it describes.
All in-kernel references to the old paths have been updated.
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-arch@vger.kernel.org
Cc: x86@kernel.org
Cc: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/lkml/20230315211523.108836-1-corbet@lwn.net/
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
