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* doc: RISC-V: Document that misaligned accesses are supportedPalmer Dabbelt2022-10-121-0/+1
| | | | | | | | | | | | The RISC-V ISA manual used to mandate that misaligned accesses were supported in user mode, but that requirement was removed in 2018 via riscv-isa-manual commit 61cadb9 ("Provide new description of misaligned load/store behavior compatible with privileged architecture."). Since the Linux uABI was already frozen at that point it's just been demoted to part of the uABI, but that was never written down. Link: https://lore.kernel.org/r/20220728210715.17214-1-palmer@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* Documentation: riscv: remove non-existent directory from table of contentsBagas Sanjaya2022-03-311-1/+0
| | | | | | | | | | | | | This subdir no longer exists: it was there to document some of the quirks and paths forward for handling them, but those have been dealt with as of Atish's recent patch set. Fixes: 23b1f18326ec ("Documentation: riscv: Remove the old documentation") Link: https://lore.kernel.org/linux-next/20220329133412.591d6882@canb.auug.org.au/ Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> [Palmer: commit text] Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* Documentation: riscv: Add documentation that describes the VM layoutAlexandre Ghiti2021-04-261-0/+1
| | | | | | | | | This new document presents the RISC-V virtual memory layout and is based one the x86 one: it describes the different limits of the different regions of the virtual address space. Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* docs: archis: add a per-architecture features listMauro Carvalho Chehab2020-12-031-0/+2
| | | | | | | | | Add a feature list matrix for each architecture to their respective Kernel books. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/9c39d4dd93e05c0008205527d2c3450912f029ed.1606748711.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* Documentation: riscv: add patch acceptance guidelinesPaul Walmsley2020-01-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Formalize, in kernel documentation, the patch acceptance policy for arch/riscv. In summary, it states that as maintainers, we plan to only accept patches for new modules or extensions that have been frozen or ratified by the RISC-V Foundation. We've been following these guidelines for the past few months. In the meantime, we've received quite a bit of feedback that it would be helpful to have these guidelines formally documented. Based on a suggestion from Matthew Wilcox, we also add a link to this file to Documentation/process/index.rst, to make this document easier to find. The format of this document has also been changed to align to the format outlined in the maintainer entry profiles, in accordance with comments from Jon Corbet and Dan Williams. Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Krste Asanovic <krste@berkeley.edu> Cc: Andrew Waterman <waterman@eecs.berkeley.edu> Cc: Matthew Wilcox <willy@infradead.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jonathan Corbet <corbet@lwn.net>
* docs: riscv: convert boot-image-header.txt to ReSTMauro Carvalho Chehab2019-07-311-0/+1
| | | | | | | | | | | | | | | Convert this small file to ReST format by: - Using a proper markup for the document title; - marking a code block as such; - use tags for Author and date; - use tables for bit map fields. While here, fix a broken reference for a document with is planned but is not here yet. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Reviewed-by: Atish Patra <atish.patra@wdc.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* docs: add arch doc directories to the indexMauro Carvalho Chehab2019-07-151-2/+0
| | | | | | | | Now that several arch documents were converted to ReST, add their indexes to Documentation/index.rst and remove the :orphan: from them. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
* docs: riscv: convert docs to ReST and rename to *.rstMauro Carvalho Chehab2019-06-141-0/+17
The conversion here is trivial: - Adjust the document title's markup - Do some whitespace alignment; - mark literal blocks; - Use ReST way to markup indented lists. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>