PatchTrack

From: Heiko Stuebner <heiko@...> Date: Thu, 9 Dec 2021 19:45:34 +0100

This series takes Guo Ren's / Wei Fu's series and modifies it to use the alternatives framework to do runtime-patching of the affected code paths. For this, we implement a non-soc-vendor cpufeature structure parallel to the vendor-erratas. I do plan to send this to the public lists tomorrow for a first round of review, so if you find time, please take a look. Missing is applying alternatives to modules. That is something I'll still need to figure out. Tests I did: - log (generated) PAGE-values for both cases (svpbmt, non-svpbmt) - regular qemu - Qemu with https://lore.kernel.org/all/20211128135255.22089-4-liweiwei@iscas.ac.cn/ and qemu_fdt_setprop_string(mc->fdt, cpu_name, "mmu", "riscv,svpbmt"); in virt - count and log the amount of patched code locations (177) Guo Ren (1): riscv: Fixup _PAGE_CHG_MASK usage in pgtable Heiko Stuebner (2): riscv: add cpufeature handling via alternatives riscv: remove FIXMAP_PAGE_IO and fall back to its default value Wei Fu (2): dt-bindings: riscv: add MMU Standard Extensions support for Svpbmt riscv: add RISC-V Svpbmt extension supports .../devicetree/bindings/riscv/cpus.yaml | 10 +++ arch/riscv/errata/Makefile | 1 + arch/riscv/errata/alternative.c | 3 + arch/riscv/errata/cpufeatures.c | 87 +++++++++++++++++++ arch/riscv/include/asm/alternative.h | 1 + arch/riscv/include/asm/errata_list.h | 13 +++ arch/riscv/include/asm/fixmap.h | 2 - arch/riscv/include/asm/pgtable-32.h | 10 +++ arch/riscv/include/asm/pgtable-64.h | 65 +++++++++++++- arch/riscv/include/asm/pgtable-bits.h | 4 - arch/riscv/include/asm/pgtable.h | 38 ++++++-- 11 files changed, 216 insertions(+), 18 deletions(-) create mode 100644 arch/riscv/errata/cpufeatures.c -- 2.30.2

Patches in this set

• [0001] riscv: Fixup _PAGE_CHG_MASK usage in pgtable (raw)
• [0002] riscv: add cpufeature handling via alternatives (raw)
• [0003] dt-bindings: riscv: add MMU Standard Extensions support (raw)
• [0004] riscv: add RISC-V Svpbmt extension supports (raw)
• [0005] riscv: remove FIXMAP_PAGE_IO and fall back to its default (raw)

Statistics

• 5 individual patches
• 217 lines added
• 19 lines removed