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| author | Pu Lehui <pulehui@huawei.com> | 2026-09-05 08:58:55 +0000 |
|---|---|---|
| committer | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-06 16:25:52 +0200 |
| commit | f80a09c486e7c2a0e4ca43dbff7570df668484c5 (patch) | |
| tree | e0917092c6688e4d9c7f682a9c82e650a7fc21db /tools | |
| parent | 3ccdb07813829ba9487273e75d1cb238cfa774c1 (diff) | |
| download | linux-next-f80a09c486e7c2a0e4ca43dbff7570df668484c5.tar.gz linux-next-f80a09c486e7c2a0e4ca43dbff7570df668484c5.zip | |
riscv, bpf: Remap BPF_REG_0 and RV_REG_TCC
To prepare for supporting bpf stack arguments and unifying the calling
convention between bpf2bpf calls and kfunc calls, remap BPF_REG_0 to t6
and RV_REG_TCC to t5.
In the riscv abi, a0-a7 are designated for function argument passing.
Freeing a5 and a6 allows bpf2bpf calls to pass extra arguments (6th to
8th) via a5-a7 consistently with kfuncs.
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/bpf/20260905085857.14143-2-pulehui@huaweicloud.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_jit_inline.c | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_ldsx.c | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_jit_inline.c b/tools/testing/selftests/bpf/progs/verifier_jit_inline.c index 02e562f56f9d..5b92da2ab75c 100644 --- a/tools/testing/selftests/bpf/progs/verifier_jit_inline.c +++ b/tools/testing/selftests/bpf/progs/verifier_jit_inline.c @@ -11,7 +11,7 @@ __jited(" addq %gs:{{.*}}, %rax") __arch_arm64 __jited(" mrs x8, SP_EL0") __arch_riscv64 -__jited(" mv a5, tp") +__jited(" mv t6, tp") __arch_loongarch __jited(" move $a5, $tp") int inline_bpf_get_current_task(void) diff --git a/tools/testing/selftests/bpf/progs/verifier_ldsx.c b/tools/testing/selftests/bpf/progs/verifier_ldsx.c index 7e25e1b8cd0b..49e8cd4bb4f9 100644 --- a/tools/testing/selftests/bpf/progs/verifier_ldsx.c +++ b/tools/testing/selftests/bpf/progs/verifier_ldsx.c @@ -289,11 +289,11 @@ __jited("ldrsh x22, [x11, #0x18]") __jited("add x11, x0, x28") __jited("ldrsb x22, [x11, #0x20]") __arch_riscv64 -__jited("add t2, a5, s7") +__jited("add t2, t6, s7") __jited("lw s3, 0x10(t2)") -__jited("add t2, a5, s7") +__jited("add t2, t6, s7") __jited("lh s3, 0x18(t2)") -__jited("add t2, a5, s7") +__jited("add t2, t6, s7") __jited("lb s3, 0x20(t2)") __jited("add t2, a0, s7") __jited("lw s4, 0x10(t2)") |