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| author | Daniel Borkmann <daniel@iogearbox.net> | 2022-02-28 16:21:39 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-02-28 16:22:58 +0100 |
| commit | 79e7ce2e519ef5b3a5cacfd0e1d8ed456b89ff9f (patch) | |
| tree | e635155b3092f474b12f9d0bbee91aebedade09f /arch/arm64/net | |
| parent | c62dd8a58d19fa35b60c84ab2435ac3ad0d3777e (diff) | |
| parent | fa1114d9eba5087ba5e81aab4c56f546995e6cd3 (diff) | |
| download | lwn-79e7ce2e519ef5b3a5cacfd0e1d8ed456b89ff9f.tar.gz lwn-79e7ce2e519ef5b3a5cacfd0e1d8ed456b89ff9f.zip | |
Merge branch 'for-next/insn' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Will Deacon says:
====================
On Tue, Feb 22, 2022 at 10:38:02PM +0000, Will Deacon wrote:
> On Thu, 17 Feb 2022 15:22:28 +0800, Hou Tao wrote:
> > Atomics support in bpf has already been done by "Atomics for eBPF"
> > patch series [1], but it only adds support for x86, and this patchset
> > adds support for arm64.
> >
> > Patch #1 & patch #2 are arm64 related. Patch #1 moves the common used
> > macro AARCH64_BREAK_FAULT into insn-def.h for insn.h. Patch #2 adds
> > necessary encoder helpers for atomic operations.
> >
> > [...]
>
> Applied to arm64 (for-next/insn), thanks!
>
> [1/4] arm64: move AARCH64_BREAK_FAULT into insn-def.h
> https://git.kernel.org/arm64/c/97e58e395e9c
> [2/4] arm64: insn: add encoders for atomic operations
> https://git.kernel.org/arm64/c/fa1114d9eba5
Daniel -- let's give this a day or so in -next, then if nothing catches
fire you're more than welcome to pull this branch as a base for the rest
of the series.
====================
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220222224211.GB16976@willie-the-truck
Diffstat (limited to 'arch/arm64/net')
| -rw-r--r-- | arch/arm64/net/bpf_jit.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/arm64/net/bpf_jit.h b/arch/arm64/net/bpf_jit.h index cc0cf0f5c7c3..9d9250c7cc72 100644 --- a/arch/arm64/net/bpf_jit.h +++ b/arch/arm64/net/bpf_jit.h @@ -89,9 +89,16 @@ #define A64_STXR(sf, Rt, Rn, Rs) \ A64_LSX(sf, Rt, Rn, Rs, STORE_EX) -/* LSE atomics */ +/* + * LSE atomics + * + * STADD is simply encoded as an alias for LDADD with XZR as + * the destination register. + */ #define A64_STADD(sf, Rn, Rs) \ - aarch64_insn_gen_stadd(Rn, Rs, A64_SIZE(sf)) + aarch64_insn_gen_atomic_ld_op(A64_ZR, Rn, Rs, \ + A64_SIZE(sf), AARCH64_INSN_MEM_ATOMIC_ADD, \ + AARCH64_INSN_MEM_ORDER_NONE) /* Add/subtract (immediate) */ #define A64_ADDSUB_IMM(sf, Rd, Rn, imm12, type) \ |