From: "Richard W.M. Jones" <rjones@redhat.com>
To: "Gabriel L. Somlo" <gsomlo@gmail.com>
Cc: matt.fleming@intel.com, mdroth@linux.vnet.ibm.com,
jordan.l.justen@intel.com, "Gabriel L. Somlo" <somlo@cmu.edu>,
qemu-devel@nongnu.org, gleb@cloudius-systems.com,
kraxel@redhat.com, pbonzini@redhat.com,
Laszlo Ersek <lersek@redhat.com>
Subject: Re: [Qemu-devel] RFC: guest-side retrieval of fw_cfg file
Date: Tue, 14 Jul 2015 19:51:02 +0100 [thread overview]
Message-ID: <20150714185102.GA4148@redhat.com> (raw)
In-Reply-To: <20150714184829.GU29283@redhat.com>
On Tue, Jul 14, 2015 at 07:48:29PM +0100, Richard W.M. Jones wrote:
> On aarch64 kernel loading is really slow because it can only transfer
> (IIRC) 8 bytes at a time, and there are no string instructions we can
> use to speed it up.
I should note here I'm talking about AAVMF (ie. guest UEFI) which has
to load the kernel via fw_cfg.
Using the -kernel option qemu-system-aarch64 is really fast because it
prepopulates the guest RAM.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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next prev parent reply other threads:[~2015-07-14 18:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-13 20:09 [Qemu-devel] RFC: guest-side retrieval of fw_cfg file Gabriel L. Somlo
2015-07-13 23:03 ` Eric Blake
2015-07-14 17:00 ` Gabriel L. Somlo
2015-07-15 11:06 ` Matt Fleming
2015-07-15 11:15 ` Laszlo Ersek
2015-07-14 9:43 ` Richard W.M. Jones
2015-07-14 18:23 ` Gabriel L. Somlo
2015-07-14 18:31 ` Gabriel L. Somlo
2015-07-14 18:48 ` Richard W.M. Jones
2015-07-14 18:51 ` Richard W.M. Jones [this message]
2015-07-14 19:16 ` Peter Maydell
2015-07-14 19:24 ` Gabriel L. Somlo
2015-07-14 19:24 ` Gerd Hoffmann
2015-07-16 0:43 ` Gabriel L. Somlo
2015-07-16 19:27 ` Eric Blake
2015-07-16 20:42 ` Gabriel L. Somlo
2015-07-14 11:38 ` Laszlo Ersek
2015-07-15 12:00 ` Matt Fleming
2015-07-20 21:19 ` Gabriel L. Somlo
2015-07-20 22:07 ` Laszlo Ersek
2015-07-25 23:21 ` Gabriel L. Somlo
2015-07-26 9:37 ` Laszlo Ersek
2015-07-15 14:08 ` Michael S. Tsirkin
2015-07-15 16:01 ` Igor Mammedov
2015-07-15 16:24 ` Michael S. Tsirkin
2015-07-16 1:21 ` Gabriel L. Somlo
2015-07-16 6:57 ` Igor Mammedov
2015-07-16 7:30 ` Michael S. Tsirkin
2015-07-16 9:50 ` Igor Mammedov
2015-07-16 10:25 ` Michael S. Tsirkin
2015-07-16 11:15 ` Igor Mammedov
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