From: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"ard.biesheuvel@linaro.org" <ard.biesheuvel@linaro.org>
Cc: "daniel@iogearbox.net" <daniel@iogearbox.net>,
"keescook@chromium.org" <keescook@chromium.org>,
"jeyu@kernel.org" <jeyu@kernel.org>,
"jannh@google.com" <jannh@google.com>,
"ast@kernel.org" <ast@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"will.deacon@arm.com" <will.deacon@arm.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"eric.dumazet@gmail.com" <eric.dumazet@gmail.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"arnd@arndb.de" <arnd@arndb.de>
Subject: Re: [PATCH v4 1/2] bpf: add __weak hook for allocating executable memory
Date: Mon, 26 Nov 2018 17:02:35 +0000 [thread overview]
Message-ID: <a16dc0bb806d6a0685978bb94c2e3f19588c063f.camel@intel.com> (raw)
In-Reply-To: <20181123221804.440-2-ard.biesheuvel@linaro.org>
On Fri, 2018-11-23 at 23:18 +0100, Ard Biesheuvel wrote:
> By default, BPF uses module_alloc() to allocate executable memory,
> but this is not necessary on all arches and potentially undesirable
> on some of them.
>
> So break out the module_alloc() and module_memfree() calls into __weak
> functions to allow them to be overridden in arch code.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
It looks like some of the architectures call module_alloc directly in their
bpf_jit_compile implementations as well.
Rick
next prev parent reply other threads:[~2018-11-26 17:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-23 22:18 [PATCH v4 0/2] bpf: permit JIT allocations to be served outside the module region Ard Biesheuvel
2018-11-23 22:18 ` [PATCH v4 1/2] bpf: add __weak hook for allocating executable memory Ard Biesheuvel
2018-11-26 17:02 ` Edgecombe, Rick P [this message]
2018-12-05 23:37 ` Kees Cook
2018-11-23 22:18 ` [PATCH v4 2/2] arm64/bpf: don't allocate BPF JIT programs in module memory Ard Biesheuvel
2018-11-30 18:26 ` Will Deacon
2018-11-30 19:20 ` Ard Biesheuvel
2018-12-03 12:49 ` Will Deacon
2018-12-04 15:45 ` Ard Biesheuvel
2018-12-05 12:24 ` Daniel Borkmann
2018-12-05 13:24 ` Will Deacon
2018-12-05 15:40 ` Daniel Borkmann
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