Re: [PATCH bpf-next 2/2] selftests/bpf: Enable arena LDSX tests for riscv64

On 2026/8/17 15:24, Chen Pei wrote:
> Now that the riscv64 JIT supports signed arena loads
> (BPF_PROBE_MEM32SX), enable the arena LDSX tests on riscv64:
> add JIT disassembly assertions for arena_ldsx_disasm (arena base in
> s7, add into t2, sign-extending lw/lh/lb loads) and run
> arena_ldsx_exception and arena_ldsx_s8/s16/s32 on riscv64.
> 
> Signed-off-by: Chen Pei <[email protected]>
> ---
>   .../testing/selftests/bpf/progs/verifier_ldsx.c | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)
> 
> diff --git a/tools/testing/selftests/bpf/progs/verifier_ldsx.c b/tools/testing/selftests/bpf/progs/verifier_ldsx.c
> index 41340877dc9d..ed0a0f159bc1 100644
> --- a/tools/testing/selftests/bpf/progs/verifier_ldsx.c
> +++ b/tools/testing/selftests/bpf/progs/verifier_ldsx.c
> @@ -286,6 +286,19 @@ __jited("add	x11, x0, x28")
>   __jited("ldrsh	x22, [x11, #0x18]")
>   __jited("add	x11, x0, x28")
>   __jited("ldrsb	x22, [x11, #0x20]")
> +__arch_riscv64
> +__jited("add	t2, a5, s7")
> +__jited("lw	s3, 0x10(t2)")
> +__jited("add	t2, a5, s7")
> +__jited("lh	s3, 0x18(t2)")
> +__jited("add	t2, a5, s7")
> +__jited("lb	s3, 0x20(t2)")
> +__jited("add	t2, a0, s7")
> +__jited("lw	s4, 0x10(t2)")
> +__jited("add	t2, a0, s7")
> +__jited("lh	s4, 0x18(t2)")
> +__jited("add	t2, a0, s7")
> +__jited("lb	s4, 0x20(t2)")
>   __naked void arena_ldsx_disasm(void *ctx)
>   {
>   	asm volatile (
> @@ -317,6 +330,7 @@ __description("Arena LDSX Exception")
>   __success __retval(0)
>   __arch_x86_64
>   __arch_arm64
> +__arch_riscv64
>   __naked void arena_ldsx_exception(void *ctx)
>   {
>   	asm volatile (
> @@ -338,6 +352,7 @@ __description("Arena LDSX, S8")
>   __success __retval(-1)
>   __arch_x86_64
>   __arch_arm64
> +__arch_riscv64
>   __naked void arena_ldsx_s8(void *ctx)
>   {
>   	asm volatile (
> @@ -369,6 +384,7 @@ __description("Arena LDSX, S16")
>   __success __retval(-1)
>   __arch_x86_64
>   __arch_arm64
> +__arch_riscv64
>   __naked void arena_ldsx_s16(void *ctx)
>   {
>   	asm volatile (
> @@ -400,6 +416,7 @@ __description("Arena LDSX, S32")
>   __success __retval(-1)
>   __arch_x86_64
>   __arch_arm64
> +__arch_riscv64
>   __naked void arena_ldsx_s32(void *ctx)
>   {
>   	asm volatile (

Reviewed-by: Pu Lehui <[email protected]>

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