From: "H. Peter Anvin" <hpa@zytor.com>
To: Kees Cook <keescook@chromium.org>
Cc: Yinghai Lu <yinghai@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Rob Landley <rob@landley.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
the arch/x86 maintainers <x86@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
linux-serial@vger.kernel.org
Subject: Re: [PATCH v2 1/3] x86, boot: add mmio serial during compressed boot
Date: Tue, 16 Jul 2013 12:36:09 -0700 [thread overview]
Message-ID: <51E5A0A9.90108@zytor.com> (raw)
In-Reply-To: <CAGXu5jJs5ve-31AYKbv6EaV5PKCf5cOEeWTRsYsi_kBbLWj5uQ@mail.gmail.com>
On 07/16/2013 12:31 PM, Kees Cook wrote:
>
> Could the first step be documenting the limitation? I've found this
> patch extremely useful for my case already, and I imagine there might
> be other people that need the early mmio stuff to. Generally the
> compressed boot serial console stuff is going to be used in the more
> common non-kexec situations at least for a while.
>
> Does this patch create any _problems_? Right now, neither low nor >4G
> kernel can use an mmio serial port. :) This this, we'd at least gain
> it for the low case.
>
Even documenting the limitation is likely to end up with a bunch of
emails asking why their kernel crashed.
I think setting up a dynamic #PF handler is the right thing for the
decompressor, we already did for the kernel proper.
-hpa
next prev parent reply other threads:[~2013-07-16 19:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-12 20:07 [PATCH 1/3] x86, boot: add mmio serial during compressed boot Kees Cook
2013-07-12 20:07 ` [PATCH 2/3] serial: report base_baud after initialization Kees Cook
2013-07-12 20:07 ` [PATCH 3/3] printk: report boot console names during cut-over Kees Cook
[not found] ` <CAGXu5jL=oSkWTGEbYLxAU1PwGbgoyeiOgFV31Gd4yj1JkDECBg@mail.gmail.com>
2013-07-12 20:17 ` [PATCH 1/3] x86, boot: add mmio serial during compressed boot Kees Cook
2013-07-12 20:20 ` H. Peter Anvin
2013-07-12 20:38 ` [PATCH v2 " Kees Cook
2013-07-13 6:47 ` Yinghai Lu
2013-07-13 14:53 ` H. Peter Anvin
2013-07-13 21:56 ` Yinghai Lu
2013-07-13 22:33 ` H. Peter Anvin
2013-07-16 19:31 ` Kees Cook
2013-07-16 19:36 ` H. Peter Anvin [this message]
2013-07-16 19:40 ` Kees Cook
2013-07-16 19:41 ` H. Peter Anvin
2013-07-16 21:59 ` Yinghai Lu
2013-07-16 21:03 ` Yinghai Lu
2013-07-16 22:05 ` H. Peter Anvin
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