| Message ID | 20240227003630.3634533-1-samuel.holland@sifive.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | riscv: 64-bit NOMMU fixes and enhancements | expand |
On Mon, Feb 26, 2024 at 04:34:45PM -0800, Samuel Holland wrote: > This series aims to improve support for NOMMU, specifically by making it > easier to test NOMMU kernels in QEMU and on various widely-available > hardware (errata permitting). After all, everything supports Svbare... > > After applying this series, a NOMMU kernel based on defconfig (changing > only the three options below*) boots to userspace on QEMU when passed as > -kernel. > > # CONFIG_RISCV_M_MODE is not set > # CONFIG_MMU is not set > CONFIG_NONPORTABLE=y > > *if you are using LLD, you must also disable BPF_SYSCALL and KALLSYMS, > because LLD bails on out-of-range references to undefined weak symbols. That's not new to these patches though, right? IIRC that's an existing issue. Cheers, Conor. > > > Samuel Holland (4): > riscv: Fix TASK_SIZE on 64-bit NOMMU > riscv: Fix loading 64-bit NOMMU kernels past the start of RAM > riscv: Remove MMU dependency from Zbb and Zicboz > riscv: Allow NOMMU kernels to run in S-mode > > arch/riscv/Kconfig | 17 ++++++++++------- > arch/riscv/include/asm/page.h | 2 +- > arch/riscv/include/asm/pgtable.h | 2 +- > arch/riscv/mm/init.c | 2 +- > 4 files changed, 13 insertions(+), 10 deletions(-) > > -- > 2.43.0 >
Hi Conor, On 2024-02-27 6:13 AM, Conor Dooley wrote: > On Mon, Feb 26, 2024 at 04:34:45PM -0800, Samuel Holland wrote: >> This series aims to improve support for NOMMU, specifically by making it >> easier to test NOMMU kernels in QEMU and on various widely-available >> hardware (errata permitting). After all, everything supports Svbare... >> >> After applying this series, a NOMMU kernel based on defconfig (changing >> only the three options below*) boots to userspace on QEMU when passed as >> -kernel. >> >> # CONFIG_RISCV_M_MODE is not set >> # CONFIG_MMU is not set >> CONFIG_NONPORTABLE=y >> >> *if you are using LLD, you must also disable BPF_SYSCALL and KALLSYMS, >> because LLD bails on out-of-range references to undefined weak symbols. > > That's not new to these patches though, right? IIRC that's an existing > issue. Yes, that's correct. I see that arch/riscv/configs/nommu_* have KALLSYMS disabled already; this may be the reason. Regards, Samuel
Hello: This series was applied to riscv/linux.git (fixes) by Palmer Dabbelt <palmer@rivosinc.com>: On Mon, 26 Feb 2024 16:34:45 -0800 you wrote: > This series aims to improve support for NOMMU, specifically by making it > easier to test NOMMU kernels in QEMU and on various widely-available > hardware (errata permitting). After all, everything supports Svbare... > > After applying this series, a NOMMU kernel based on defconfig (changing > only the three options below*) boots to userspace on QEMU when passed as > -kernel. > > [...] Here is the summary with links: - [1/4] riscv: Fix TASK_SIZE on 64-bit NOMMU https://git.kernel.org/riscv/c/6065e736f82c - [2/4] riscv: Fix loading 64-bit NOMMU kernels past the start of RAM https://git.kernel.org/riscv/c/aea702dde7e9 - [3/4] riscv: Remove MMU dependency from Zbb and Zicboz (no matching commit) - [4/4] riscv: Allow NOMMU kernels to run in S-mode (no matching commit) You are awesome, thank you!
Hello: This series was applied to riscv/linux.git (for-next) by Palmer Dabbelt <palmer@rivosinc.com>: On Mon, 26 Feb 2024 16:34:45 -0800 you wrote: > This series aims to improve support for NOMMU, specifically by making it > easier to test NOMMU kernels in QEMU and on various widely-available > hardware (errata permitting). After all, everything supports Svbare... > > After applying this series, a NOMMU kernel based on defconfig (changing > only the three options below*) boots to userspace on QEMU when passed as > -kernel. > > [...] Here is the summary with links: - [1/4] riscv: Fix TASK_SIZE on 64-bit NOMMU (no matching commit) - [2/4] riscv: Fix loading 64-bit NOMMU kernels past the start of RAM (no matching commit) - [3/4] riscv: Remove MMU dependency from Zbb and Zicboz https://git.kernel.org/riscv/c/9c4319d69744 - [4/4] riscv: Allow NOMMU kernels to run in S-mode https://git.kernel.org/riscv/c/f862bbf4cdca You are awesome, thank you!