| From: |
| Christoph Hellwig <hch-AT-lst.de> |
| To: |
| Palmer Dabbelt <palmer-AT-sifive.com>, Paul Walmsley <paul.walmsley-AT-sifive.com> |
| Subject: |
| RISC-V nommu support v4 |
| Date: |
| Tue, 3 Sep 2019 11:32:19 +0200 |
| Message-ID: |
| <20190903093239.21278-1-hch@lst.de> |
| Cc: |
| Damien Le Moal <damien.lemoal-AT-wdc.com>, linux-riscv-AT-lists.infradead.org, linux-kernel-AT-vger.kernel.org |
| Archive-link: |
| Article |
Hi all,
below is a series to support nommu mode on RISC-V. For now this series
just works under qemu with the qemu-virt platform, but Damien has also
been able to get kernel based on this tree with additional driver hacks
to work on the Kendryte KD210, but that will take a while to cleanup
an upstream.
A git tree is available here:
git://git.infradead.org/users/hch/riscv.git riscv-nommu.4
Gitweb:
http://git.infradead.org/users/hch/riscv.git/shortlog/ref...
I've also pushed out a builtroot branch that can build a RISC-V nommu
root filesystem here:
git://git.infradead.org/users/hch/buildroot.git riscv-nommu.2
Gitweb:
http://git.infradead.org/users/hch/buildroot.git/shortlog...
Changes since v3:
- improve a few commit message
- cleanup riscv_cpuid_to_hartid_mask
- cleanup the timer handling
- cleanup the IPI handling a little more
- renamed CONFIG_M_MODE to CONFIG_RISCV_M_MODE
- split out CONFIG_RISCV_SBI to make some of the ifdefs more obbious
- use IS_ENABLED wherever possible instead of if ifdefs to make the
code more readable
Changes since v2:
- rebased to 5.3-rc
- remove the EFI image header for nommu builds
- set ARCH_SLAB_MINALIGN to ensure stack alignment in the flat binary
loader
- minor comment improvement
- use #defines for more CSRs
Changes since v1:
- fixes so that a kernel with this series still work on builds with an
IOMMU
- small clint cleanups
- the binfmt_flat base and buildroot now don't put arguments on the stack
