netdev - Re: [PATCH RESEND bpf-next v2 0/3] Use bpf_prog

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Date: Mon, 01 Jul 2024 15:20:30 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Pu Lehui <pulehui@...weicloud.com>
Cc: bpf@...r.kernel.org, linux-riscv@...ts.infradead.org,
 netdev@...r.kernel.org, bjorn@...nel.org, ast@...nel.org,
 daniel@...earbox.net, andrii@...nel.org, martin.lau@...ux.dev,
 eddyz87@...il.com, song@...nel.org, yhs@...com, john.fastabend@...il.com,
 kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com, jolsa@...nel.org,
 puranjay@...nel.org, palmer@...belt.com, pulehui@...wei.com
Subject: Re: [PATCH RESEND bpf-next v2 0/3] Use bpf_prog_pack for RV64 bpf
 trampoline

Hello:

This series was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Sat, 22 Jun 2024 03:04:34 +0000 you wrote:
> We used bpf_prog_pack to aggregate bpf programs into huge page to
> relieve the iTLB pressure on the system. We can apply it to bpf
> trampoline, as Song had been implemented it in core and x86 [0]. This
> patch is going to use bpf_prog_pack to RV64 bpf trampoline. Since Song
> and Puranjay have done a lot of work for bpf_prog_pack on RV64,
> implementing this function will be easy. But one thing to mention is
> that emit_call in RV64 will generate the maximum number of instructions
> during dry run, but during real patching it may be optimized to 1
> instruction due to distance. This is no problem as it does not overflow
> the allocated RO image.
> 
> [...]

Here is the summary with links:
  - [RESEND,bpf-next,v2,1/3] bpf: Use precise image size for struct_ops trampoline
    https://git.kernel.org/bpf/bpf-next/c/d1a426171d76
  - [RESEND,bpf-next,v2,2/3] riscv, bpf: Fix out-of-bounds issue when preparing trampoline image
    https://git.kernel.org/bpf/bpf-next/c/9f1e16fb1fc9
  - [RESEND,bpf-next,v2,3/3] riscv, bpf: Use bpf_prog_pack for RV64 bpf trampoline
    https://git.kernel.org/bpf/bpf-next/c/2382a405c581

You are awesome, thank you!
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