netdev - Re: [PATCHv2 1/7] ppc bpf/jit: Disable classic BPF JIT on ppc64le

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Date:	Wed, 22 Jun 2016 13:50:48 -0300
From:	Thadeu Lima de Souza Cascardo <cascardo@...hat.com>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	netdev@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>,
	stable@...r.kernel.org, Matt Evans <matt@...abs.org>,
	Denis Kirjanov <kda@...ux-powerpc.org>,
	Paul Mackerras <paulus@...ba.org>,
	Alexei Starovoitov <ast@...com>,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>
Subject: Re: [PATCHv2 1/7] ppc bpf/jit: Disable classic BPF JIT on ppc64le

On Wed, Jun 22, 2016 at 09:55:01PM +0530, Naveen N. Rao wrote:
> Classic BPF JIT was never ported completely to work on little endian
> powerpc. However, it can be enabled and will crash the system when used.
> As such, disable use of BPF JIT on ppc64le.

Thanks, Naveen.

Acked-by: Thadeu Lima de Souza Cascardo <cascardo@...hat.com>

> 
> Cc: stable@...r.kernel.org
> Cc: Matt Evans <matt@...abs.org>
> Cc: Denis Kirjanov <kda@...ux-powerpc.org>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Alexei Starovoitov <ast@...com>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
> Cc: Thadeu Lima de Souza Cascardo <cascardo@...hat.com>
> Reported-by: Thadeu Lima de Souza Cascardo <cascardo@...hat.com>
> Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
> ---
>  arch/powerpc/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 01f7464..0a9d439 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -128,7 +128,7 @@ config PPC
>  	select IRQ_FORCED_THREADING
>  	select HAVE_RCU_TABLE_FREE if SMP
>  	select HAVE_SYSCALL_TRACEPOINTS
> -	select HAVE_CBPF_JIT
> +	select HAVE_CBPF_JIT if CPU_BIG_ENDIAN
>  	select HAVE_ARCH_JUMP_LABEL
>  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
>  	select ARCH_HAS_GCOV_PROFILE_ALL
> -- 
> 2.8.2
>