linux-kernel - Re: [PATCH 2/3] qemu: Implement virtio-pstore device

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Date:	Mon, 18 Jul 2016 17:33:35 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Christian Borntraeger <borntraeger@...ibm.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Radim Kr??m???? <rkrcmar@...hat.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Anthony Liguori <aliguori@...zon.com>,
	Anton Vorontsov <anton@...msg.org>,
	Colin Cross <ccross@...roid.com>,
	Kees Cook <keescook@...omium.org>,
	Tony Luck <tony.luck@...el.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>,
	Minchan Kim <minchan@...nel.org>, kvm@...r.kernel.org,
	qemu-devel@...gnu.org, virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH 2/3] qemu: Implement virtio-pstore device

Hello,

On Mon, Jul 18, 2016 at 09:28:42AM +0200, Christian Borntraeger wrote:
> On 07/18/2016 06:37 AM, Namhyung Kim wrote:
> 
> Can you do the virtio-mmio and virtio-ccw plumbing as well, or
> do you need help with that?

Any help would be greatly appreciated!

Thanks,
Namhyung


> 
> [...]
> > diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> > index 2b34b43..8281b80 100644
> > --- a/hw/virtio/virtio-pci.c
> > +++ b/hw/virtio/virtio-pci.c
> > @@ -2416,6 +2416,55 @@ static const TypeInfo virtio_host_pci_info = {
> >  };
> >  #endif
> > 
> > +/* virtio-pstore-pci */
> > +
> > +static void virtio_pstore_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
> > +{
> > +    VirtIOPstorePCI *vps = VIRTIO_PSTORE_PCI(vpci_dev);
> > +    DeviceState *vdev = DEVICE(&vps->vdev);
> > +    Error *err = NULL;
> > +
> > +    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
> > +    object_property_set_bool(OBJECT(vdev), true, "realized", &err);
> > +    if (err) {
> > +        error_propagate(errp, err);
> > +        return;
> > +    }
> > +}
> > +
> > +static void virtio_pstore_pci_class_init(ObjectClass *klass, void *data)
> > +{
> > +    DeviceClass *dc = DEVICE_CLASS(klass);
> > +    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
> > +    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
> > +
> > +    k->realize = virtio_pstore_pci_realize;
> > +    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
> > +
> > +    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
> > +    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_PSTORE;
> > +    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
> > +    pcidev_k->class_id = PCI_CLASS_OTHERS;
> > +}
> > +
> > +static void virtio_pstore_pci_instance_init(Object *obj)
> > +{
> > +    VirtIOPstorePCI *dev = VIRTIO_PSTORE_PCI(obj);
> > +
> > +    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
> > +                                TYPE_VIRTIO_PSTORE);
> > +    object_property_add_alias(obj, "directory", OBJECT(&dev->vdev),
> > +                              "directory", &error_abort);
> > +}
> > +
> > +static const TypeInfo virtio_pstore_pci_info = {
> > +    .name          = TYPE_VIRTIO_PSTORE_PCI,
> > +    .parent        = TYPE_VIRTIO_PCI,
> > +    .instance_size = sizeof(VirtIOPstorePCI),
> > +    .instance_init = virtio_pstore_pci_instance_init,
> > +    .class_init    = virtio_pstore_pci_class_init,
> > +};
> > +
> >  /* virtio-pci-bus */
> > 
> >  static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
> > @@ -2485,6 +2534,7 @@ static void virtio_pci_register_types(void)
> >  #ifdef CONFIG_VHOST_SCSI
> >      type_register_static(&vhost_scsi_pci_info);
> >  #endif
> > +    type_register_static(&virtio_pstore_pci_info);
> >  }
> > 
> >  type_init(virtio_pci_register_types)
> > diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
> > index e4548c2..b4c039f 100644
> > --- a/hw/virtio/virtio-pci.h
> > +++ b/hw/virtio/virtio-pci.h
> > @@ -31,6 +31,7 @@
> >  #ifdef CONFIG_VHOST_SCSI
> >  #include "hw/virtio/vhost-scsi.h"
> >  #endif
> > +#include "hw/virtio/virtio-pstore.h"
> > 
> >  typedef struct VirtIOPCIProxy VirtIOPCIProxy;
> >  typedef struct VirtIOBlkPCI VirtIOBlkPCI;
> > @@ -44,6 +45,7 @@ typedef struct VirtIOInputPCI VirtIOInputPCI;
> >  typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI;
> >  typedef struct VirtIOInputHostPCI VirtIOInputHostPCI;
> >  typedef struct VirtIOGPUPCI VirtIOGPUPCI;
> > +typedef struct VirtIOPstorePCI VirtIOPstorePCI;
> > 
> >  /* virtio-pci-bus */
> > 
> > @@ -311,6 +313,18 @@ struct VirtIOGPUPCI {
> >      VirtIOGPU vdev;
> >  };
> > 
> > +/*
> > + * virtio-pstore-pci: This extends VirtioPCIProxy.
> > + */
> > +#define TYPE_VIRTIO_PSTORE_PCI "virtio-pstore-pci"
> > +#define VIRTIO_PSTORE_PCI(obj) \
> > +        OBJECT_CHECK(VirtIOPstorePCI, (obj), TYPE_VIRTIO_PSTORE_PCI)
> > +
> > +struct VirtIOPstorePCI {
> > +    VirtIOPCIProxy parent_obj;
> > +    VirtIOPstore vdev;
> > +};
> > +
> >  /* Virtio ABI version, if we increment this, we break the guest driver. */
> >  #define VIRTIO_PCI_ABI_VERSION          0
> > 
> 
> [...]
>