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From: Paul Durrant <xadimgnik@gmail.com>
To: "'Anthony PERARD'" <anthony.perard@citrix.com>
Cc: 'Eduardo Habkost' <ehabkost@redhat.com>,
	"'Michael S. Tsirkin'" <mst@redhat.com>,
	'Paul Durrant' <pdurrant@amazon.com>,
	'Jason Andryuk' <jandryuk@gmail.com>,
	qemu-devel@nongnu.org, 'Paolo Bonzini' <pbonzini@redhat.com>,
	xen-devel@lists.xenproject.org,
	'Richard Henderson' <rth@twiddle.net>
Subject: RE: [PATCH 2/2] xen: cleanup unrealized flash devices
Date: Tue, 30 Jun 2020 16:17:11 +0100
Message-ID: <000401d64ef1$87c8d8a0$975a89e0$@xen.org> (raw)
In-Reply-To: <20200630150849.GA2110@perard.uk.xensource.com>

> -----Original Message-----
> From: Anthony PERARD <anthony.perard@citrix.com>
> Sent: 30 June 2020 16:09
> To: Paul Durrant <paul@xen.org>
> Cc: xen-devel@lists.xenproject.org; qemu-devel@nongnu.org; Eduardo Habkost <ehabkost@redhat.com>;
> Michael S. Tsirkin <mst@redhat.com>; Paul Durrant <pdurrant@amazon.com>; Jason Andryuk
> <jandryuk@gmail.com>; Paolo Bonzini <pbonzini@redhat.com>; Richard Henderson <rth@twiddle.net>
> Subject: Re: [PATCH 2/2] xen: cleanup unrealized flash devices
> 
> On Wed, Jun 24, 2020 at 01:18:41PM +0100, Paul Durrant wrote:
> > From: Paul Durrant <pdurrant@amazon.com>
> >
> > The generic pc_machine_initfn() calls pc_system_flash_create() which creates
> > 'system.flash0' and 'system.flash1' devices. These devices are then realized
> > by pc_system_flash_map() which is called from pc_system_firmware_init() which
> > itself is called via pc_memory_init(). The latter however is not called when
> > xen_enable() is true and hence the following assertion fails:
> >
> > qemu-system-i386: hw/core/qdev.c:439: qdev_assert_realized_properly:
> > Assertion `dev->realized' failed
> >
> > These flash devices are unneeded when using Xen so this patch avoids the
> > assertion by simply removing them using pc_system_flash_cleanup_unused().
> >
> > Reported-by: Jason Andryuk <jandryuk@gmail.com>
> > Fixes: ebc29e1beab0 ("pc: Support firmware configuration with -blockdev")
> > Signed-off-by: Paul Durrant <pdurrant@amazon.com>
> > Tested-by: Jason Andryuk <jandryuk@gmail.com>
> 
> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
> 
> I think I would add:
> 
> Fixes: dfe8c79c4468 ("qdev: Assert onboard devices all get realized properly")
> 
> as this is the first commit where the unrealized flash devices are an
> issue.

OK.

  Paul

> 
> --
> Anthony PERARD



  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-24 12:18 [PATCH 0/2] fix assertion failures when using Xen Paul Durrant
2020-06-24 12:18 ` [PATCH 1/2] xen: fix legacy 'xen-sysdev' and 'xen-backend' bus types Paul Durrant
2020-06-30 15:19   ` Philippe Mathieu-Daudé
2020-06-24 12:18 ` [PATCH 2/2] xen: cleanup unrealized flash devices Paul Durrant
2020-06-30 15:08   ` Anthony PERARD
2020-06-30 15:17     ` Paul Durrant [this message]
2020-07-01  5:56     ` Markus Armbruster
2020-06-30 15:25   ` Philippe Mathieu-Daudé
2020-06-30 15:44     ` Paul Durrant
2020-06-30 17:27       ` Philippe Mathieu-Daudé
2020-07-01  5:59         ` Markus Armbruster
2020-07-01  7:03         ` Paul Durrant
2020-07-01 12:25           ` Jason Andryuk
2020-07-01 12:40             ` Philippe Mathieu-Daudé
2020-07-01 12:55               ` Philippe Mathieu-Daudé
2020-07-01 14:59                 ` Jason Andryuk
2020-07-01 15:10                   ` Philippe Mathieu-Daudé
2020-07-02  3:55             ` Markus Armbruster

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