From: Greg KH <gregkh@linuxfoundation.org>
To: Vaibhav Rustagi <vaibhavrustagi@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Vivek Goyal <vgoyal@redhat.com>,
Nick Desaulniers <ndesaulniers@google.com>,
stable@vger.kernel.org
Subject: Re: [PATCH 1/2] x86/purgatory: add -mno-sse, -mno-mmx, -mno-sse2 to Makefile
Date: Thu, 18 Jul 2019 09:47:05 +0900 [thread overview]
Message-ID: <20190718004705.GA31085@kroah.com> (raw)
In-Reply-To: <20190718000206.121392-2-vaibhavrustagi@google.com>
On Wed, Jul 17, 2019 at 05:02:05PM -0700, Vaibhav Rustagi wrote:
> Compiling the purgatory code with clang results in using of mmx
> registers.
>
> $ objdump -d arch/x86/purgatory/purgatory.ro | grep xmm
>
> 112: 0f 28 00 movaps (%rax),%xmm0
> 115: 0f 11 07 movups %xmm0,(%rdi)
> 122: 0f 28 00 movaps (%rax),%xmm0
> 125: 0f 11 47 10 movups %xmm0,0x10(%rdi)
>
> Add -mno-sse, -mno-mmx, -mno-sse2 to avoid generating SSE instructions.
>
> Signed-off-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
> ---
> arch/x86/purgatory/Makefile | 1 +
> 1 file changed, 1 insertion(+)
<formletter>
This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read:
https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.
</formletter>
next prev parent reply other threads:[~2019-07-18 0:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-18 0:02 [PATCH 0/2] Support kexec/kdump for clang built kernel Vaibhav Rustagi
2019-07-18 0:02 ` [PATCH 1/2] x86/purgatory: add -mno-sse, -mno-mmx, -mno-sse2 to Makefile Vaibhav Rustagi
2019-07-18 0:47 ` Greg KH [this message]
2019-07-18 21:34 ` Nick Desaulniers
2019-07-19 8:17 ` Peter Zijlstra
2019-07-22 21:12 ` Nick Desaulniers
2019-07-18 0:02 ` [PATCH 2/2] x86/purgatory: do not use __builtin_memcpy and __builtin_memset Vaibhav Rustagi
2019-07-18 0:47 ` Greg KH
2019-07-18 21:56 ` Nick Desaulniers
2019-07-18 21:29 ` [PATCH 0/2] Support kexec/kdump for clang built kernel Nick Desaulniers
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