linux-kernel - Re: [PATCH] RFC: arm: eBPF JIT compiler

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Date:   Tue, 23 May 2017 22:34:55 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Shubham Bansal <illusionist.neo@...il.com>
Cc:     linux@...linux.org.uk, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] RFC: arm: eBPF JIT compiler

On Wed, May 24, 2017 at 12:03:53AM +0530, Shubham Bansal wrote:
> The JIT compiler emits ARM 32 bit instructions. Currently, It supports
> eBPF only. Classic BPF is supported because of the conversion by BPF
> core.
> 
> JIT is enabled with
> 
> 	echo 1 > /proc/sys/net/core/bpf_jit_enable
> 
> Constant Blinding can be enabled along with JIT using
> 
> 	echo 1 > /proc/sys/net/core/bpf_jit_enable
> 	echo 2 > /proc/sys/net/core/bpf_jit_harden
> 
> See Documentation/networking/filter.txt for more information.
> Tested on ARMv7 with CONFIG_FRAME_POINTER enabled.
> 
> Results:
> 
> 1. Interpreter:
> 
> 	[   93.551176] test_bpf: Summary: 314 PASSED, 0 FAILED, [0/306 JIT'ed]
> 
> 2. JIT enabled:
> 
> 	[   92.913931] test_bpf: Summary: 314 PASSED, 0 FAILED, [278/306 JIT'ed]
> 
> 3. JIT + blinding enabled:
> 
> 	[  109.414506] test_bpf: Summary: 314 PASSED, 0 FAILED, [278/306 JIT'ed]

Hi Shubham

Is there a HOWTO or a README somewhere about running the tests? I have
a few ARMv5 platforms i can run tests on.

  Thanks
	Andrew