From: Gerd Hoffmann <kraxel@redhat.com>
To: "Marc Marí" <markmb@redhat.com>
Cc: Drew <drjones@redhat.com>, Stefan Hajnoczi <stefanha@gmail.com>,
"Gabriel L. Somlo" <somlo@cmu.edu>,
qemu-devel@nongnu.org, Kevin O'Connor <kevin@koconnor.net>,
Laszlo Ersek <lersek@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v4 6/7] Make the kernel image in the fw_cfg DMA interface bootable
Date: Fri, 02 Oct 2015 11:01:08 +0200 [thread overview]
Message-ID: <1443776468.14636.20.camel@redhat.com> (raw)
In-Reply-To: <20151002102408.23266dc0@markmb_rh>
Hi,
> A solution that I can see is adding DMA boot capabilities to the
> linuxboot.S optionrom. I was trying to avoid this, but it looks like
> not doing so creates lots of problems. It may be better than adding a
> "nice" shortcut somewhere in QEMU or SeaBIOS.
>
> Who uses this optionrom (and will benefit from this change)?
Any -kernel boot on x86 will use either linuxboot.bin or multiboot.bin.
>From a compatibility point of view implementing it in the option rom
certainly has its advantages. And as the option roms are shipped with
and loaded by qemu you don't even have to do runtime detection if that
simplifies things. We can just build two versions of the roms and qemu
can use the one or the other depending on whenever the machine type in
question has fw_cfg dma enabled or not.
cheers,
Gerd
next prev parent reply other threads:[~2015-10-02 9:01 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-01 12:14 [Qemu-devel] QEMU fw_cfg DMA interface Marc Marí
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 0/7] " Marc Marí
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 1/7] fw_cfg: document fw_cfg_modify_iXX() update functions Marc Marí
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 2/7] fw_cfg DMA interface documentation Marc Marí
2015-10-01 14:41 ` Laszlo Ersek
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 3/7] Implement fw_cfg DMA interface Marc Marí
2015-10-01 14:36 ` Laszlo Ersek
2015-10-01 15:52 ` Marc Marí
2015-10-01 17:18 ` Peter Maydell
2015-10-01 19:20 ` Laszlo Ersek
2015-10-06 14:44 ` Stefan Hajnoczi
2015-10-06 14:53 ` Peter Maydell
2015-10-08 9:07 ` Stefan Hajnoczi
2015-10-08 10:01 ` Marc Marí
2015-10-06 14:54 ` Marc Marí
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 4/7] Enable fw_cfg DMA interface for ARM Marc Marí
2015-10-01 14:42 ` Laszlo Ersek
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 5/7] Enable fw_cfg DMA interface for x86 Marc Marí
2015-10-01 14:48 ` Laszlo Ersek
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 6/7] Make the kernel image in the fw_cfg DMA interface bootable Marc Marí
2015-10-01 15:25 ` Laszlo Ersek
2015-10-01 16:02 ` Kevin O'Connor
2015-10-01 16:10 ` Laszlo Ersek
2015-10-01 18:15 ` Marc Marí
2015-10-02 8:16 ` Gerd Hoffmann
2015-10-02 8:24 ` Marc Marí
2015-10-02 9:01 ` Gerd Hoffmann [this message]
2015-10-02 11:47 ` Laszlo Ersek
2015-10-02 12:07 ` Gerd Hoffmann
2015-10-02 13:25 ` Laszlo Ersek
2015-10-02 13:30 ` Laszlo Ersek
2015-10-03 0:05 ` Jordan Justen
2015-10-02 13:38 ` Kevin O'Connor
2015-10-05 9:18 ` Gerd Hoffmann
2015-10-02 8:09 ` Gerd Hoffmann
2015-10-02 13:40 ` Kevin O'Connor
2015-10-02 13:50 ` Laszlo Ersek
2015-10-02 15:24 ` Daniel P. Berrange
2015-10-05 9:26 ` Gerd Hoffmann
2015-10-01 12:16 ` [Qemu-devel] [PATCH v4 7/7] fw_cfg: Define a static signature to be returned on DMA port reads Marc Marí
2015-10-01 16:07 ` Laszlo Ersek
2015-10-01 17:02 ` Kevin O'Connor
2015-10-01 17:17 ` Laszlo Ersek
2015-10-01 13:19 ` [Qemu-devel] [PATCH v4 0/7] fw_cfg DMA interface Kevin O'Connor
2015-10-01 16:03 ` [Qemu-devel] QEMU " Eric Blake
2015-10-01 16:11 ` Eric Blake
2015-10-01 16:19 ` Laszlo Ersek
2015-10-01 16:17 ` Laszlo Ersek
2015-10-01 16:21 ` Eric Blake
2015-10-01 16:34 ` Laszlo Ersek
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