From: "Michael Brown" <mcb30@ipxe.org>
To: Ethin Probst <harlydavidsen@gmail.com>, devel@edk2.groups.io
Cc: Andrew Fish <afish@apple.com>,
Mike Kinney <michael.d.kinney@intel.com>,
Leif Lindholm <leif@nuviainc.com>,
Laszlo Ersek <lersek@redhat.com>,
"Desimone, Nathaniel L" <nathaniel.l.desimone@intel.com>,
Rafael Rodrigues Machado <rafaelrodrigues.machado@gmail.com>,
Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: [edk2-devel] VirtIO Sound Driver (GSoC 2021)
Date: Fri, 16 Apr 2021 02:03:56 +0100 [thread overview]
Message-ID: <4f029f76-0f11-f229-af04-2407ac80308b@ipxe.org> (raw)
In-Reply-To: <CAJQtwF26jWDBg4M0fzM=ctH_0CLFfTqOfoSw45UhU=u+v7A=FQ@mail.gmail.com>
On 16/04/2021 01:59, Ethin Probst wrote:
> Also, I'm a bit confused. I've looked at several VirtIO devices now
> and have seen things like this:
> #define VIRTIO_PCI_DEVICE_SIGNATURE SIGNATURE_32 ('V', 'P', 'C', 'I')
> // ...
> UINT32 Signature;
> I'm quite confused because I can't seem to find this anywhere in the
> VirtIO specification. The spec says nothing about signature values
> anywhere, just the magic value of 0x74726976. So where does this come
> from?
From a quick look at the code, it seems to be a private signature value
applied to a software-only data structure used by the UEFI driver, and
is used solely for sanity checking that a pointer is pointing to the
right kind of object.
Michael
next prev parent reply other threads:[~2021-04-16 1:03 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 20:28 VirtIO Sound Driver (GSoC 2021) Ethin Probst
2021-03-30 3:17 ` [edk2-devel] " Nate DeSimone
2021-03-30 14:41 ` Ethin Probst
2021-03-31 6:34 ` Nate DeSimone
2021-03-30 21:50 ` Rafael Machado
2021-03-30 22:12 ` Ethin Probst
[not found] ` <16713E6D64EE917D.25648@groups.io>
2021-03-31 0:01 ` Ethin Probst
2021-03-31 5:02 ` Andrew Fish
2021-03-31 6:41 ` Nate DeSimone
2021-04-01 5:05 ` Ethin Probst
2021-04-05 4:42 ` Andrew Fish
2021-04-05 4:43 ` Ethin Probst
2021-04-05 5:10 ` Andrew Fish
2021-04-06 14:16 ` Laszlo Ersek
2021-04-06 15:17 ` Ethin Probst
2021-04-13 12:28 ` Leif Lindholm
2021-04-13 14:16 ` Andrew Fish
2021-04-13 16:53 ` Ethin Probst
2021-04-13 21:38 ` Andrew Fish
2021-04-13 23:47 ` Ethin Probst
[not found] ` <16758FB6436B1195.32393@groups.io>
2021-04-14 1:20 ` Ethin Probst
2021-04-14 3:52 ` Andrew Fish
2021-04-14 20:47 ` Ethin Probst
2021-04-14 22:30 ` Michael D Kinney
2021-04-14 23:54 ` Andrew Fish
2021-04-15 4:01 ` Ethin Probst
2021-04-15 4:58 ` Andrew Fish
2021-04-15 5:28 ` Ethin Probst
2021-04-15 12:07 ` Michael Brown
2021-04-15 16:42 ` Andrew Fish
2021-04-15 20:11 ` Ethin Probst
2021-04-15 22:35 ` Andrew Fish
2021-04-15 23:42 ` Ethin Probst
2021-04-16 0:59 ` Michael Brown
2021-04-16 5:13 ` Andrew Fish
2021-04-16 5:33 ` Ethin Probst
2021-04-16 11:34 ` Leif Lindholm
2021-04-16 17:03 ` Andrew Fish
2021-04-16 17:45 ` Ethin Probst
2021-04-16 17:55 ` Ethin Probst
2021-04-16 18:09 ` Andrew Fish
2021-04-16 23:50 ` Ethin Probst
2021-04-16 18:02 ` Andrew Fish
2021-04-17 16:51 ` Marvin Häuser
2021-04-17 17:31 ` Andrew Fish
2021-04-17 18:04 ` Marvin Häuser
2021-04-18 8:55 ` Ethin Probst
2021-04-18 15:22 ` Andrew Fish
2021-04-18 19:11 ` Marvin Häuser
2021-04-18 19:22 ` Marvin Häuser
2021-04-18 21:00 ` Andrew Fish
2021-04-16 13:22 ` Marvin Häuser
2021-04-16 14:34 ` Andrew Fish
2021-04-16 15:03 ` Marvin Häuser
[not found] ` <16762C957671127A.12361@groups.io>
2021-04-16 0:59 ` Ethin Probst
2021-04-16 1:03 ` Michael Brown [this message]
2021-04-16 2:06 ` Ethin Probst
2021-04-16 3:48 ` Andrew Fish
2021-04-16 4:29 ` Ethin Probst
2021-04-15 9:51 ` Laszlo Ersek
2021-04-15 16:01 ` Andrew Fish
2021-04-04 22:05 ` Marvin Häuser
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4f029f76-0f11-f229-af04-2407ac80308b@ipxe.org \
--to=devel@edk2.groups.io \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox