These patches fix Smepmp implementation to make it compliant with the spec.
First patch limits RLB to CSR changes since RLB should not affect privilege evaluation. Patch 2 extracts some common code into a function (to be used in patch 3). Patch 3 fixes validation of pmpcfg CSR writes in order to match Smepmp specification. Patch 4 is a small optimization and last patch is just removing redundant code. --- Changes in v2: - rebased to latest riscv-to-apply.next - addressed Daniel comments on patch 1 Link to v1: https://lore.kernel.org/qemu-riscv/20250225160052.39564-1-l...@rivosinc.com/ Loïc Lefort (5): target/riscv: pmp: don't allow RLB to bypass rule privileges target/riscv: pmp: move Smepmp operation conversion into a function target/riscv: pmp: fix checks on writes to pmpcfg in Smepmp MML mode target/riscv: pmp: exit csr writes early if value was not changed target/riscv: pmp: remove redundant check in pmp_is_locked target/riscv/pmp.c | 151 +++++++++++++++++++++++++-------------------- 1 file changed, 83 insertions(+), 68 deletions(-) -- 2.47.2
