From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>,
Markus Armbruster <armbru@redhat.com>
Cc: "Daniel P. Berrange" <berrange@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>,
Alistair Francis <alistair@alistair23.me>,
QEMU Developers <qemu-devel@nongnu.org>,
qemu-arm <qemu-arm@nongnu.org>,
Paolo Bonzini <pbonzini@redhat.com>,
KONRAD Frederic <fred.konrad@greensocs.com>
Subject: Re: [PATCH 02/24] display/xlnx_dp: Fix to realize "i2c-ddc" and "aux-to-i2c-bridge"
Date: Mon, 18 May 2020 13:13:05 +0200 [thread overview]
Message-ID: <8daeec76-0851-54a3-d84b-67a6019eef85@redhat.com> (raw)
In-Reply-To: <CAFEAcA-FKUHyG=bgJqPG49WZDXV8JGQqqZXOw49C8_h9mYS5iA@mail.gmail.com>
On 5/18/20 12:30 PM, Peter Maydell wrote:
> On Mon, 18 May 2020 at 06:04, Markus Armbruster <armbru@redhat.com> wrote:
>>
>> xlnx_dp_init() creates these two devices, but they're never realized.
>> Affects machine xlnx-zcu102.
>>
>> I wonder how this ever worked. If the "device becomes real only on
>> realize" thing actually works, then we've always been missing these
>> two devices, yet nobody noticed.
>
> It depends entirely on the implementation of the device.
> If it happens to do nothing in the realize method that
> matters (eg i2c-ddc has no realize method and does the limited
> amount of initialization it needs in instance_init) then the
> device will (by lucky accident) work just fine.
>
> We should really ideally have an assert() in the DeviceClass
> reset that the device was realized, so we can keep this kind
> of bug out of the codebase. (Last time I looked it wasn't obvious
> exactly where to put the assert now that we have both legacy-reset
> and three-phase-reset, unfortunately.)
Your wish came true in the last patch of this series! #24:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg704239.html
>
> thanks
> -- PMM
>
next prev parent reply other threads:[~2020-05-18 11:14 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 5:03 [PATCH 00/24] Fixes around device realization Markus Armbruster
2020-05-18 5:03 ` [PATCH 01/24] arm/stm32f405: Fix realization of "stm32f2xx-adc" devices Markus Armbruster
2020-05-18 16:48 ` Alistair Francis
2020-05-19 5:08 ` Markus Armbruster
2020-05-19 22:20 ` Alistair Francis
2020-05-27 9:27 ` Markus Armbruster
2020-05-27 11:24 ` Philippe Mathieu-Daudé
2020-05-18 5:03 ` [PATCH 02/24] display/xlnx_dp: Fix to realize "i2c-ddc" and "aux-to-i2c-bridge" Markus Armbruster
2020-05-18 8:19 ` Fred Konrad
2020-05-19 5:09 ` Markus Armbruster
2020-05-19 9:48 ` Peter Maydell
2020-05-19 12:07 ` Markus Armbruster
2020-05-18 9:59 ` Edgar E. Iglesias
2020-05-18 10:30 ` Peter Maydell
2020-05-18 11:13 ` Philippe Mathieu-Daudé [this message]
2020-05-19 5:13 ` Markus Armbruster
2020-05-18 16:56 ` Alistair Francis
2020-05-18 5:03 ` [PATCH 03/24] sd/pxa2xx_mmci: Fix to realize "pxa2xx-mmci" device Markus Armbruster
2020-05-21 16:20 ` Peter Maydell
2020-05-18 5:03 ` [PATCH 04/24] aspeed: Don't create unwanted "ftgmac100", "aspeed-mmi" devices Markus Armbruster
2020-05-18 12:19 ` Cédric Le Goater
2020-05-19 0:20 ` Andrew Jeffery
2020-05-19 5:45 ` Markus Armbruster
2020-05-19 11:42 ` Philippe Mathieu-Daudé
2020-05-19 12:44 ` Cédric Le Goater
2020-05-19 0:38 ` Joel Stanley
2020-05-19 5:35 ` Markus Armbruster
2020-05-18 5:03 ` [PATCH 05/24] aspeed: Don't create unwanted "cortex-a7-arm-cpu" devices Markus Armbruster
2020-05-18 12:24 ` Cédric Le Goater
2020-05-19 0:40 ` Joel Stanley
2020-05-19 5:46 ` Markus Armbruster
2020-05-19 9:35 ` Cédric Le Goater
2020-05-18 5:03 ` [PATCH 06/24] armv7m: Bury unwanted "ARM,bitband-memory" devices Markus Armbruster
2020-05-21 16:17 ` Peter Maydell
2020-05-25 5:50 ` Markus Armbruster
2020-05-25 12:32 ` Paolo Bonzini
2020-05-25 12:49 ` Peter Maydell
2020-05-26 5:19 ` Markus Armbruster
2020-05-18 5:03 ` [PATCH 07/24] auxbus: Fix aux-to-i2c-bridge to be a subtype of aux-slave Markus Armbruster
2020-05-18 8:53 ` Philippe Mathieu-Daudé
2020-05-18 5:03 ` [PATCH 08/24] mac_via: Fix to realize "mos6522-q800-via*" devices Markus Armbruster
2020-05-18 20:25 ` Mark Cave-Ayland
2020-05-18 5:03 ` [PATCH 09/24] macio: Fix to realize "mos6522-cuda" and "mos6522-pmu" devices Markus Armbruster
2020-05-21 16:26 ` Peter Maydell
2020-05-25 6:25 ` Markus Armbruster
2020-05-27 14:12 ` Markus Armbruster
2020-05-27 15:05 ` Peter Maydell
2020-05-27 15:12 ` Paolo Bonzini
2020-05-28 6:57 ` Markus Armbruster
2020-05-27 16:08 ` Markus Armbruster
2020-05-18 5:03 ` [PATCH 10/24] macio: Bury unwanted "macio-gpio" devices Markus Armbruster
2020-05-18 20:35 ` Mark Cave-Ayland
2020-05-19 6:06 ` Markus Armbruster
2020-05-18 5:03 ` [PATCH 11/24] pnv/phb4: Bury unwanted "pnv-phb4-pec-stack" devices Markus Armbruster
2020-05-18 8:49 ` Greg Kurz
2020-05-18 13:24 ` Cédric Le Goater
2020-05-19 8:16 ` Cédric Le Goater
2020-05-19 11:50 ` Markus Armbruster
2020-05-18 5:03 ` [PATCH 12/24] MAINTAINERS: Make section PowerNV cover pci-host/pnv* as well Markus Armbruster
2020-05-18 6:41 ` David Gibson
2020-05-18 5:03 ` [PATCH 13/24] ppc4xx: Drop redundant device realization Markus Armbruster
2020-05-18 8:54 ` Philippe Mathieu-Daudé
2020-05-18 10:27 ` BALATON Zoltan
2020-05-19 6:07 ` Markus Armbruster
2020-05-18 16:41 ` Thomas Huth
2020-05-18 5:03 ` [PATCH 14/24] macio: Put "macio-nvram" device on the macio bus Markus Armbruster
2020-05-18 20:37 ` Mark Cave-Ayland
2020-05-18 5:03 ` [PATCH 15/24] macio: Fix macio-bus to be a subtype of System bus Markus Armbruster
2020-05-18 8:55 ` Philippe Mathieu-Daudé
2020-05-18 20:39 ` Mark Cave-Ayland
2020-05-19 6:09 ` Markus Armbruster
2020-05-18 5:04 ` [PATCH 16/24] ppc/pnv: Put "*-pnv-chip" and "pnv-xive" on the main system bus Markus Armbruster
2020-05-18 16:34 ` Cédric Le Goater
2020-05-19 6:28 ` Markus Armbruster
2020-05-19 13:05 ` Cédric Le Goater
2020-05-18 5:04 ` [PATCH 17/24] pnv/psi: Correct the pnv-psi* devices not to be sysbus devices Markus Armbruster
2020-05-18 16:27 ` Cédric Le Goater
2020-05-19 6:30 ` Markus Armbruster
2020-05-19 13:04 ` Cédric Le Goater
2020-05-18 5:04 ` [PATCH 18/24] display/sm501 display/ati: Fix to realize "i2c-ddc" Markus Armbruster
2020-05-18 10:32 ` BALATON Zoltan
2020-05-19 6:30 ` Markus Armbruster
2020-05-18 10:39 ` BALATON Zoltan
2020-05-18 10:45 ` Philippe Mathieu-Daudé
2020-05-19 6:35 ` Markus Armbruster
2020-05-18 5:04 ` [PATCH 19/24] riscv: Fix to put "riscv.hart_array" devices on sysbus Markus Armbruster
2020-05-18 17:03 ` Alistair Francis
2020-05-18 5:04 ` [PATCH 20/24] riscv: Fix type of SiFive[EU]SocState, member parent_obj Markus Armbruster
2020-05-18 8:58 ` Philippe Mathieu-Daudé
2020-05-18 16:57 ` Alistair Francis
2020-05-18 5:04 ` [PATCH 21/24] sparc/leon3: Fix to put grlib,* devices on sysbus Markus Armbruster
2020-05-18 8:09 ` Fred Konrad
2020-05-18 8:59 ` Philippe Mathieu-Daudé
2020-05-18 5:04 ` [PATCH 22/24] qdev: Assert devices are plugged into a bus that can take them Markus Armbruster
2020-05-18 15:03 ` Markus Armbruster
2020-05-18 20:42 ` Mark Cave-Ayland
2020-05-18 5:04 ` [PATCH 23/24] sd: Hide the qdev-but-not-quite thing created by sd_init() Markus Armbruster
2020-05-18 5:04 ` [PATCH 24/24] qdev: Assert onboard devices all get realized properly Markus Armbruster
2020-05-18 9:10 ` Philippe Mathieu-Daudé
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