From: Sami Tolvanen <samitolvanen@google.com>
To: Will Deacon <will@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, Kees Cook <keescook@chromium.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
clang-built-linux <clang-built-linux@googlegroups.com>
Subject: Re: [PATCH] arm64: fix alternatives with LLVM's integrated assembler
Date: Mon, 14 Oct 2019 17:28:09 -0700 [thread overview]
Message-ID: <CABCJKueDZBd1TZyNTH-jo=DsVeze=mout1ooK5sSbPb52RyjPA@mail.gmail.com> (raw)
In-Reply-To: <20191015000017.66jkcya6zzbi7qqc@willie-the-truck>
On Mon, Oct 14, 2019 at 5:00 PM Will Deacon <will@kernel.org> wrote:
> Is there any benefit from supporting '-no-integrated-as' but not 'AS=clang'?
> afaict, you have to hack the top-level Makefile for that.
The goal is to eventually support AS=clang and this patch gets us one
step closer to that. However, with this patch (and the LSE one), we
can already use Clang's integrated assembler for inline assembly,
which is a requirement for compiling the kernel with LTO. Google has
shipped LTO kernels on Pixel devices for a couple of generations now.
Sami
WARNING: multiple messages have this Message-ID (diff)
From: Sami Tolvanen <samitolvanen@google.com>
To: Will Deacon <will@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Nick Desaulniers <ndesaulniers@google.com>,
LKML <linux-kernel@vger.kernel.org>,
clang-built-linux <clang-built-linux@googlegroups.com>,
Marc Zyngier <maz@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] arm64: fix alternatives with LLVM's integrated assembler
Date: Mon, 14 Oct 2019 17:28:09 -0700 [thread overview]
Message-ID: <CABCJKueDZBd1TZyNTH-jo=DsVeze=mout1ooK5sSbPb52RyjPA@mail.gmail.com> (raw)
In-Reply-To: <20191015000017.66jkcya6zzbi7qqc@willie-the-truck>
On Mon, Oct 14, 2019 at 5:00 PM Will Deacon <will@kernel.org> wrote:
> Is there any benefit from supporting '-no-integrated-as' but not 'AS=clang'?
> afaict, you have to hack the top-level Makefile for that.
The goal is to eventually support AS=clang and this patch gets us one
step closer to that. However, with this patch (and the LSE one), we
can already use Clang's integrated assembler for inline assembly,
which is a requirement for compiling the kernel with LTO. Google has
shipped LTO kernels on Pixel devices for a couple of generations now.
Sami
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-10-15 0:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-07 21:14 [PATCH] arm64: fix alternatives with LLVM's integrated assembler Sami Tolvanen
2019-10-07 21:14 ` Sami Tolvanen
2019-10-07 21:34 ` Nick Desaulniers
2019-10-07 21:34 ` Nick Desaulniers
2019-10-07 23:47 ` Sami Tolvanen
2019-10-07 23:47 ` Sami Tolvanen
2019-10-15 0:00 ` Will Deacon
2019-10-15 0:00 ` Will Deacon
2019-10-15 0:28 ` Sami Tolvanen [this message]
2019-10-15 0:28 ` Sami Tolvanen
2019-10-15 20:30 ` Nick Desaulniers
2019-10-15 20:30 ` Nick Desaulniers
2019-10-15 20:31 ` Nick Desaulniers
2019-10-15 20:31 ` Nick Desaulniers
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