netdev - Re: [PATCH RFC] arm64: eBPF JIT compiler

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <53B52102.7060400@redhat.com>
Date:	Thu, 03 Jul 2014 11:23:14 +0200
From:	Daniel Borkmann <dborkman@...hat.com>
To:	Will Deacon <will.deacon@....com>
CC:	Zi Shen Lim <zlim.lnx@...il.com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"David S. Miller" <davem@...emloft.net>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Chema Gonzalez <chema@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH RFC] arm64: eBPF JIT compiler

On 07/03/2014 11:14 AM, Will Deacon wrote:
> On Wed, Jul 02, 2014 at 06:20:24AM +0100, Zi Shen Lim wrote:
>> The JIT compiler emits A64 instructions. It supports eBPF only.
>> Legacy BPF is supported thanks to conversion by BPF core.
>>
>> JIT is enabled in the same way as for other architectures:
>>
>>          echo 1 > /proc/sys/net/core/bpf_jit_enable
>>
>> Or for additional compiler output:
>>
>>          echo 2 > /proc/sys/net/core/bpf_jit_enable
>>
>> See Documentation/networking/filter.txt for more information.
>>
>> The implementation passes all 57 tests in lib/test_bpf.c
>> on ARMv8 Foundation Model :)
>
> First off, this is really cool. Thanks for putting in the effort to get this
> supported on arm64! I'm happy to run tests on some real hardware if you tell
> me how to run them :)

We have lib/test_bpf.c for this, see also Documentation/networking/filter.txt.

So, the procedure would be, e.g.:

  1) echo 1 > /proc/sys/net/core/bpf_jit_enable
  2) modprobe/insmod test_bpf
  3) See kernel log for passes/fails

For seccomp/BPF, there's a test suite in:

  https://github.com/redpig/seccomp
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html