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From: Markus Armbruster <armbru@redhat.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, Paul Durrant <paul@xen.org>,
	xen-devel@lists.xenproject.org,
	Paolo Bonzini <pbonzini@redhat.com>,
	Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH 2/2] xen: cleanup unrealized flash devices
Date: Wed, 01 Jul 2020 07:56:24 +0200
Message-ID: <87eepvdbhz.fsf@dusky.pond.sub.org> (raw)
In-Reply-To: <20200630150849.GA2110@perard.uk.xensource.com> (Anthony PERARD's message of "Tue, 30 Jun 2020 16:08:49 +0100")

Anthony PERARD <anthony.perard@citrix.com> writes:

> 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.

They were an issue before, but commit dfe8c79c4468 turned the minor
issue into a crash bug.  No objections.



  parent 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
2020-07-01  5:56     ` Markus Armbruster [this message]
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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