lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <f4f01d2a-666b-58a1-cf76-84541643bdc3@huaweicloud.com> Date: Thu, 16 Feb 2023 09:23:02 +0800 From: Pu Lehui <pulehui@...weicloud.com> To: Björn Töpel <bjorn@...nel.org>, bpf@...r.kernel.org, linux-riscv@...ts.infradead.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, Conor Dooley <conor.dooley@...rochip.com>, Guo Ren <guoren@...nel.org>, Luke Nelson <luke.r.nels@...il.com>, Xi Wang <xi.wang@...il.com>, Pu Lehui <pulehui@...wei.com> Subject: Re: [PATCH bpf-next v1 0/4] Support bpf trampoline for RV64 On 2023/2/15 22:45, Björn Töpel wrote: > Hi Lehui, > > Pu Lehui <pulehui@...weicloud.com> writes: > >> BPF trampoline is the critical infrastructure of the bpf >> subsystem, acting as a mediator between kernel functions >> and BPF programs. Numerous important features, such as >> using ebpf program for zero overhead kernel introspection, >> rely on this key component. We can't wait to support bpf >> trampoline on RV64. Since RV64 does not support ftrace >> direct call yet, the current RV64 bpf trampoline is only >> used in bpf context. > > Thanks a lot for continuing this work. I agree with you that it's > valuable to have BPF trampoline support, even without proper direct call > support (we'll get there soon). The trampoline enables kfunc calls. On > that note; I don't see that you enable "bpf_jit_supports_kfunc_call()" > anywhere in the series. With BPF trampoline support, the RISC-V BPF > finally can support kfunc calls! > > I'd add the following to bpf_jit_comp64.c: > happy to hear that,let's make it more completeable. > bool bpf_jit_supports_kfunc_call(void) > { > return true; > } > > :-) > > I'll do a review ASAP. > > > Björn
Powered by blists - more mailing lists