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Re: [PATCH v3 02/10] pci: mark devices partially unplugged
From: |
Alex Williamson |
Subject: |
Re: [PATCH v3 02/10] pci: mark devices partially unplugged |
Date: |
Tue, 15 Oct 2019 19:53:47 -0600 |
On Fri, 11 Oct 2019 13:20:07 +0200
Jens Freimann <address@hidden> wrote:
> Only the guest unplug request was triggered. This is needed for
> the failover feature. In case of a failed migration we need to
> plug the device back to the guest.
>
> Signed-off-by: Jens Freimann <address@hidden>
> ---
> hw/pci/pci.c | 2 ++
> hw/pci/pcie.c | 3 +++
> include/hw/pci/pci.h | 1 +
> 3 files changed, 6 insertions(+)
>
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index aa05c2b9b2..c140b37765 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -2078,6 +2078,8 @@ static void pci_qdev_realize(DeviceState *qdev, Error
> **errp)
> Error *local_err = NULL;
> bool is_default_rom;
>
> + pci_dev->partially_hotplugged = false;
This is redundant though since the object is zero initialized on
allocation, right? Thanks,
Alex
> +
> /* initialize cap_present for pci_is_express() and pci_config_size(),
> * Note that hybrid PCIs are not set automatically and need to manage
> * QEMU_PCI_CAP_EXPRESS manually */
> diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
> index a6beb567bd..19363ff8ce 100644
> --- a/hw/pci/pcie.c
> +++ b/hw/pci/pcie.c
> @@ -456,6 +456,9 @@ static void pcie_unplug_device(PCIBus *bus, PCIDevice
> *dev, void *opaque)
> {
> HotplugHandler *hotplug_ctrl = qdev_get_hotplug_handler(DEVICE(dev));
>
> + if (dev->partially_hotplugged) {
> + return;
> + }
> hotplug_handler_unplug(hotplug_ctrl, DEVICE(dev), &error_abort);
> object_unparent(OBJECT(dev));
> }
> diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
> index f3f0ffd5fb..f3a39c9bbd 100644
> --- a/include/hw/pci/pci.h
> +++ b/include/hw/pci/pci.h
> @@ -265,6 +265,7 @@ typedef struct PCIReqIDCache PCIReqIDCache;
>
> struct PCIDevice {
> DeviceState qdev;
> + bool partially_hotplugged;
>
> /* PCI config space */
> uint8_t *config;
- [PATCH v3 0/10] add failover feature for assigned network devices, Jens Freimann, 2019/10/11
- [PATCH v3 01/10] qdev/qbus: add hidden device support, Jens Freimann, 2019/10/11
- [PATCH v3 02/10] pci: mark devices partially unplugged, Jens Freimann, 2019/10/11
- Re: [PATCH v3 02/10] pci: mark devices partially unplugged,
Alex Williamson <=
- [PATCH v3 03/10] pci: mark device having guest unplug request pending, Jens Freimann, 2019/10/11
- [PATCH v3 04/10] qapi: add unplug primary event, Jens Freimann, 2019/10/11
- [PATCH v3 05/10] qapi: add failover negotiated event, Jens Freimann, 2019/10/11
- [PATCH v3 06/10] migration: allow unplug during migration for failover devices, Jens Freimann, 2019/10/11
- [PATCH v3 07/10] migration: add new migration state wait-unplug, Jens Freimann, 2019/10/11