[RFC,v2,0/2] Risc-V Svinval support

Message

Mayuresh Chitale April 24, 2022, 9:02 a.m. UTC

This patch adds support for the Svinval extension as defined in the
Risc V Privileged specification. This patchset depends on:

https://patchwork.kernel.org/project/linux-riscv/list/?series=632984

The feature was tested with qemu from latest master branch with
following additional patch:
https://lists.nongnu.org/archive/html/qemu-riscv/2022-03/msg00142.html

Changes in V2:

- Rebased on 5.18-rc3
- update riscv_fill_hwcap to probe Svinval extension

Mayuresh Chitale (2):
  riscv: enum for svinval extension
  riscv: mm: use svinval instructions instead of sfence.vma

 arch/riscv/include/asm/hwcap.h    |   1 +
 arch/riscv/include/asm/tlbflush.h |  12 ++++
 arch/riscv/kernel/cpu.c           |   1 +
 arch/riscv/kernel/cpufeature.c    |   1 +
 arch/riscv/kernel/setup.c         |   1 +
 arch/riscv/mm/tlbflush.c          | 116 ++++++++++++++++++++++++++++--
 6 files changed, 126 insertions(+), 6 deletions(-)

Comments

Palmer Dabbelt June 2, 2022, 3:52 a.m. UTC | #1

On Sun, 24 Apr 2022 02:02:14 PDT (-0700), [e-mail] wrote:
>
> This patch adds support for the Svinval extension as defined in the
> Risc V Privileged specification. This patchset depends on:
>
> https://patchwork.kernel.org/project/linux-riscv/list/?series=632984

IIRC Marc still has some unresolved feedback on that one, for the IRQ 
bits?

>
> The feature was tested with qemu from latest master branch with
> following additional patch:
> https://lists.nongnu.org/archive/html/qemu-riscv/2022-03/msg00142.html
>
> Changes in V2:
>
> - Rebased on 5.18-rc3
> - update riscv_fill_hwcap to probe Svinval extension
>
> Mayuresh Chitale (2):
>   riscv: enum for svinval extension
>   riscv: mm: use svinval instructions instead of sfence.vma
>
>  arch/riscv/include/asm/hwcap.h    |   1 +
>  arch/riscv/include/asm/tlbflush.h |  12 ++++
>  arch/riscv/kernel/cpu.c           |   1 +
>  arch/riscv/kernel/cpufeature.c    |   1 +
>  arch/riscv/kernel/setup.c         |   1 +
>  arch/riscv/mm/tlbflush.c          | 116 ++++++++++++++++++++++++++++--
>  6 files changed, 126 insertions(+), 6 deletions(-)