Changes in V2 V1: https://lore.kernel.org/bpf/20240323154652.54572-1-puranjay12@xxxxxxxxx/ - Used S7 in place of S11 for storing the kernel_vm_start - Used 17 in place of 16 for DONT_CLEAR marker - Remove an unused variable - Removed some misleading information from the commit message. This series adds the support for PROBE_MEM32 and bpf_addr_space_cast instructions to the RISCV BPF JIT. These two instructions allow the enablement of BPF Arena. All arena related selftests are passing: root@rv-tester:~/bpf# uname -p riscv64 root@rv-tester:~/bpf# ./test_progs -a "*arena*" #3/1 arena_htab/arena_htab_llvm:OK #3/2 arena_htab/arena_htab_asm:OK #3 arena_htab:OK #4/1 arena_list/arena_list_1:OK #4/2 arena_list/arena_list_1000:OK #4 arena_list:OK #434/1 verifier_arena/basic_alloc1:OK #434/2 verifier_arena/basic_alloc2:OK #434/3 verifier_arena/basic_alloc3:OK #434/4 verifier_arena/iter_maps1:OK #434/5 verifier_arena/iter_maps2:OK #434/6 verifier_arena/iter_maps3:OK #434 verifier_arena:OK Summary: 3/10 PASSED, 0 SKIPPED, 0 FAILED This needs the patch[1] that adds the insn_is_cast_user() helper to build. It also needs the following patches/commits [2][3] to work correctly. [1] https://lore.kernel.org/bpf/20240324183226.29674-1-puranjay12@xxxxxxxxx/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=f7f5d1808b1b66935a24dd796dd1a0612ca9c147 [3] https://lore.kernel.org/bpf/20240324103306.2202954-1-pulehui@xxxxxxxxxxxxxxx/ Puranjay Mohan (2): bpf,riscv: Implement PROBE_MEM32 pseudo instructions bpf,riscv: Implement bpf_addr_space_cast instruction arch/riscv/net/bpf_jit.h | 2 + arch/riscv/net/bpf_jit_comp64.c | 207 +++++++++++++++++++++++++++++++- arch/riscv/net/bpf_jit_core.c | 2 + 3 files changed, 208 insertions(+), 3 deletions(-) -- 2.40.1
