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

Message

Mayuresh Chitale Feb. 16, 2022, 5:21 a.m. UTC

This patch adds support for the Svinval extension version 1.0 as defined in the
Risc V Privileged specification. It depends on and needs to be applied on the
following patchsets from Atish and Anup respectively:

https://patchwork.kernel.org/project/linux-riscv/list/?series=613234
https://patchwork.kernel.org/project/linux-riscv/list/?series=609361

The feature was tested with qemu from latest staging branch with following
additional patch:
https://lists.nongnu.org/archive/html/qemu-riscv/2022-02/msg00100.html 

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 | 14 +++++++
 arch/riscv/kernel/cpu.c           |  1 +
 arch/riscv/kernel/setup.c         |  1 +
 arch/riscv/mm/Makefile            |  1 +
 arch/riscv/mm/tlb.S               | 53 +++++++++++++++++++++++
 arch/riscv/mm/tlbflush.c          | 70 ++++++++++++++++++++++++++++---
 7 files changed, 135 insertions(+), 6 deletions(-)
 create mode 100644 arch/riscv/mm/tlb.S