2024-04-04 11:53:35

by Puranjay Mohan

Subject: [PATCH bpf-next v4 0/2] bpf,riscv: Add support for BPF Arena

Changes in V4:
V3: https://lore.kernel.org/all/[email protected]/
- Fix some style issues.
- Add Tested-by: and Reviewed-by: tags by Pu Lehui and Björn

Changes in V3
V2: https://lore.kernel.org/bpf/[email protected]/
- Use REG_DONT_CLEAR_MARKER in place of DONT_CLEAR as the name.
- Use RV_REG_ZERO for the above as it is guaranteed to be never used in as
dst/src register in BPF LDX/STX/ST instructions.
- Use #define RV_REG_ARENA for RV_REG_S7

Changes in V2
V1: https://lore.kernel.org/bpf/[email protected]/
- 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

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 | 203 +++++++++++++++++++++++++++++++-
arch/riscv/net/bpf_jit_core.c | 2 +
3 files changed, 205 insertions(+), 2 deletions(-)

--
2.40.1

2024-04-04 14:50:42

by patchwork-bot+netdevbpf

Subject: Re: [PATCH bpf-next v4 0/2] bpf,riscv: Add support for BPF Arena

Hello:

This series was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <[email protected]>:

On Thu, 4 Apr 2024 11:42:01 +0000 you wrote:
> Changes in V4:
> V3: https://lore.kernel.org/all/[email protected]/
> - Fix some style issues.
> - Add Tested-by: and Reviewed-by: tags by Pu Lehui and Björn
>
> Changes in V3
> V2: https://lore.kernel.org/bpf/[email protected]/
> - Use REG_DONT_CLEAR_MARKER in place of DONT_CLEAR as the name.
> - Use RV_REG_ZERO for the above as it is guaranteed to be never used in as
> dst/src register in BPF LDX/STX/ST instructions.
> - Use #define RV_REG_ARENA for RV_REG_S7
>
> [...]

Here is the summary with links:
- [bpf-next,v4,1/2] bpf,riscv: Implement PROBE_MEM32 pseudo instructions
https://git.kernel.org/bpf/bpf-next/c/633a6e01d1a2
- [bpf-next,v4,2/2] bpf,riscv: Implement bpf_addr_space_cast instruction
https://git.kernel.org/bpf/bpf-next/c/21ab0b6d0cfc

You are awesome, thank you!
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