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From: Peter Maydell <peter.maydell@linaro.org>
To: Damien Hedde <damien.hedde@greensocs.com>
Cc: "Daniel P. Berrange" <berrange@redhat.com>,
	"Eduardo Habkost" <ehabkost@redhat.com>,
	qemu-s390x <qemu-s390x@nongnu.org>,
	"Cornelia Huck" <cohuck@redhat.com>,
	"Mark Burton" <mark.burton@greensocs.com>,
	"QEMU Developers" <qemu-devel@nongnu.org>,
	"Edgar Iglesias" <edgari@xilinx.com>,
	qemu-arm <qemu-arm@nongnu.org>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>,
	"David Gibson" <david@gibson.dropbear.id.au>
Subject: Re: [PATCH v5 10/13] vl: replace deprecated qbus_reset_all registration
Date: Fri, 29 Nov 2019 19:01:45 +0000	[thread overview]
Message-ID: <CAFEAcA_TJSSoqd+gCL=r9b_W4mpFyWOOb0ouLiXP5k16L0TOZA@mail.gmail.com> (raw)
In-Reply-To: <20191018150630.31099-11-damien.hedde@greensocs.com>

On Fri, 18 Oct 2019 at 16:07, Damien Hedde <damien.hedde@greensocs.com> wrote:
>
> Replace deprecated qbus_reset_all by resettable_cold_reset_fn for
> the sysbus reset registration.
>
> Apart for the raspi machines, this does not impact the behavior
> because:
> + at this point resettable just call the old reset methods of devices

"calls"

>   and buses in the same order than qdev/qbus.

"same order as"

> + resettable handlers registered with qemu_register_reset are
>   serialized; there is no interleaving.
> + eventual explicit calls to legacy reset API (device_reset or
>   qdev/qbus_reset) inside this reset handler will not be masked out
>   by resettable mechanism; they do not go through resettable api.
>
> For the raspi machines, during the sysbus reset the sd-card is not
> reset twice anymore but only once. This is consequence of switching

"a consequence"

> both sysbus reset and changing parent to resettable; it detects the
> second reset is not needed. This has no impact on the state after
> reset; the sd-card reset method only reset local state and query
> information from the block backend.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM


  reply	other threads:[~2019-11-29 19:08 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-18 15:06 [PATCH v5 00/13] Multi-phase reset mechanism Damien Hedde
2019-10-18 15:06 ` [PATCH v5 01/13] add device_legacy_reset function to prepare for reset api change Damien Hedde
2019-10-19 17:35   ` Richard Henderson
2019-12-03 10:55   ` Cornelia Huck
2019-10-18 15:06 ` [PATCH v5 02/13] hw/core/qdev: add trace events to help with resettable transition Damien Hedde
2019-10-19 17:44   ` Richard Henderson
2019-10-31 23:23   ` Philippe Mathieu-Daudé
2019-11-04 12:16     ` Damien Hedde
2019-11-04 14:33       ` Philippe Mathieu-Daudé
2019-12-03 10:57   ` Cornelia Huck
2019-10-18 15:06 ` [PATCH v5 03/13] hw/core: create Resettable QOM interface Damien Hedde
2019-11-29 18:32   ` Peter Maydell
2019-12-02 11:07     ` Damien Hedde
2019-12-02 11:14       ` Peter Maydell
2019-12-03 11:16   ` Cornelia Huck
2019-10-18 15:06 ` [PATCH v5 04/13] hw/core: add Resettable support to BusClass and DeviceClass Damien Hedde
2019-10-19 18:49   ` Richard Henderson
2019-11-29 18:36   ` Peter Maydell
2019-12-02 11:38     ` Damien Hedde
2019-10-18 15:06 ` [PATCH v5 05/13] hw/core/resettable: add support for changing parent Damien Hedde
2019-11-29 18:38   ` Peter Maydell
2019-12-02 11:43     ` Damien Hedde
2019-10-18 15:06 ` [PATCH v5 06/13] hw/core/qdev: handle parent bus change regarding resettable Damien Hedde
2019-11-29 18:41   ` Peter Maydell
2019-12-03 11:37     ` Cornelia Huck
2019-10-18 15:06 ` [PATCH v5 07/13] hw/core/qdev: update hotplug reset " Damien Hedde
2019-11-08 15:14   ` Damien Hedde
2019-10-18 15:06 ` [PATCH v5 08/13] hw/core: deprecate old reset functions and introduce new ones Damien Hedde
2019-10-31 23:35   ` Philippe Mathieu-Daudé
2019-11-04 12:01     ` Damien Hedde
2019-11-04 15:42       ` Philippe Mathieu-Daudé
2019-11-29 18:42   ` Peter Maydell
2019-10-18 15:06 ` [PATCH v5 09/13] docs/devel/reset.txt: add doc about Resettable interface Damien Hedde
2019-11-29 19:00   ` Peter Maydell
2019-12-06 15:40     ` Damien Hedde
2019-12-06 16:21     ` Damien Hedde
2019-10-18 15:06 ` [PATCH v5 10/13] vl: replace deprecated qbus_reset_all registration Damien Hedde
2019-11-29 19:01   ` Peter Maydell [this message]
2019-10-18 15:06 ` [PATCH v5 11/13] hw/s390x/ipl: replace deprecated qdev_reset_all registration Damien Hedde
2019-10-31 23:38   ` Philippe Mathieu-Daudé
2019-11-29 19:02   ` Peter Maydell
2019-12-03 11:41   ` Cornelia Huck
2019-10-18 15:06 ` [PATCH v5 12/13] hw/gpio/bcm2835_gpio: Isolate sdbus reparenting Damien Hedde
2019-11-29 19:05   ` Peter Maydell
2019-12-02 12:27     ` Damien Hedde
2019-12-02 12:33       ` Peter Maydell
2019-12-02 13:05         ` Damien Hedde
2019-12-02 13:10           ` Peter Maydell
2019-10-18 15:06 ` [PATCH v5 13/13] hw/gpio/bcm2835_gpio: Update to resettable Damien Hedde
2019-11-29 19:02   ` Peter Maydell
2019-10-19  9:01 ` [PATCH v5 00/13] Multi-phase reset mechanism no-reply
2019-10-29 15:53 ` Damien Hedde
2019-11-08 15:26   ` Damien Hedde
2019-11-08 15:28     ` Peter Maydell
2019-11-08 15:58       ` Damien Hedde
2019-11-29 19:07 ` Peter Maydell
2019-12-03 11:44 ` Cornelia Huck

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