From: Eduard Zingerman <eddyz87@gmail.com>
To: Puranjay Mohan <puranjay@kernel.org>,
Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org,
daniel@iogearbox.net, martin.lau@linux.dev, kernel-team@fb.com,
yonghong.song@linux.dev, jose.marchesi@oracle.com
Subject: Re: [RFC bpf-next v1 3/8] bpf, x86: no_caller_saved_registers for bpf_get_smp_processor_id()
Date: Thu, 04 Jul 2024 09:39:15 -0700 [thread overview]
Message-ID: <bbada62650812ad0c015af5cc513f8108369adec.camel@gmail.com> (raw)
In-Reply-To: <mb61ptth5be13.fsf@kernel.org>
On Thu, 2024-07-04 at 11:19 +0000, Puranjay Mohan wrote:
[...]
> And when we JIT the 'BPF_JMP | BPF_CALL' we add a mov instruction at the
> end to move A0 to A5 on risc-v and R0 to R7 on arm64.
>
> But when inlining the call we can directly put the result in A5 or R7.
Oh, I see that additional move, thank you for explaining!
Best regards,
Eduard
next prev parent reply other threads:[~2024-07-04 16:39 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-29 9:47 [RFC bpf-next v1 0/8] no_caller_saved_registers attribute for helper calls Eduard Zingerman
2024-06-29 9:47 ` [RFC bpf-next v1 1/8] bpf: add a get_helper_proto() utility function Eduard Zingerman
2024-07-02 0:41 ` Andrii Nakryiko
2024-07-02 20:07 ` Eduard Zingerman
2024-06-29 9:47 ` [RFC bpf-next v1 2/8] bpf: no_caller_saved_registers attribute for helper calls Eduard Zingerman
2024-07-01 19:01 ` Eduard Zingerman
2024-07-02 0:41 ` Andrii Nakryiko
2024-07-02 20:38 ` Eduard Zingerman
2024-07-02 21:09 ` Andrii Nakryiko
2024-07-02 21:19 ` Eduard Zingerman
2024-07-02 21:22 ` Andrii Nakryiko
2024-07-03 11:57 ` Puranjay Mohan
2024-07-03 16:13 ` Eduard Zingerman
2024-07-04 10:55 ` Puranjay Mohan
2024-06-29 9:47 ` [RFC bpf-next v1 3/8] bpf, x86: no_caller_saved_registers for bpf_get_smp_processor_id() Eduard Zingerman
2024-07-02 0:41 ` Andrii Nakryiko
2024-07-02 20:43 ` Eduard Zingerman
2024-07-02 21:11 ` Andrii Nakryiko
2024-07-02 21:25 ` Eduard Zingerman
2024-07-03 11:27 ` Puranjay Mohan
2024-07-03 23:14 ` Eduard Zingerman
2024-07-04 11:19 ` Puranjay Mohan
2024-07-04 16:39 ` Eduard Zingerman [this message]
2024-07-04 17:00 ` Eduard Zingerman
2024-07-04 17:24 ` Puranjay Mohan
2024-07-04 17:39 ` Eduard Zingerman
2024-06-29 9:47 ` [RFC bpf-next v1 4/8] selftests/bpf: extract utility function for BPF disassembly Eduard Zingerman
2024-07-02 0:41 ` Andrii Nakryiko
2024-07-02 20:59 ` Eduard Zingerman
2024-07-02 21:16 ` Andrii Nakryiko
2024-07-02 21:23 ` Eduard Zingerman
2024-06-29 9:47 ` [RFC bpf-next v1 5/8] selftests/bpf: no need to track next_match_pos in struct test_loader Eduard Zingerman
2024-07-02 0:41 ` Andrii Nakryiko
2024-07-02 21:05 ` Eduard Zingerman
2024-07-02 21:18 ` Andrii Nakryiko
2024-06-29 9:47 ` [RFC bpf-next v1 6/8] selftests/bpf: extract test_loader->expect_msgs as a data structure Eduard Zingerman
2024-07-02 0:42 ` Andrii Nakryiko
2024-07-02 21:06 ` Eduard Zingerman
2024-06-29 9:47 ` [RFC bpf-next v1 7/8] selftests/bpf: allow checking xlated programs in verifier_* tests Eduard Zingerman
2024-07-02 0:42 ` Andrii Nakryiko
2024-07-02 21:07 ` Eduard Zingerman
2024-07-02 21:19 ` Andrii Nakryiko
2024-06-29 9:47 ` [RFC bpf-next v1 8/8] selftests/bpf: test no_caller_saved_registers spill/fill removal Eduard Zingerman
2024-07-02 0:42 ` Andrii Nakryiko
2024-07-02 21:12 ` Eduard Zingerman
2024-07-02 21:20 ` Andrii Nakryiko
2024-07-02 0:41 ` [RFC bpf-next v1 0/8] no_caller_saved_registers attribute for helper calls Andrii Nakryiko
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