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hw/virtio: group virtio flags into an enum 

Minimizes the possibility to assign
the same bit to different features.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit fc1769b758)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Marcel Apfelbaum 2016-02-10 15:31:13 +02:00 committed by Michael Roth
parent 6b62303eb8
commit c5c9841ce8
1 changed files with 10 additions and 7 deletions
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17
hw/virtio/virtio-pci.h
View File

@ -59,30 +59,33 @@ typedef struct VirtioBusClass VirtioPCIBusClass;
#define VIRTIO_PCI_BUS_CLASS(klass) \ #define VIRTIO_PCI_BUS_CLASS(klass) \
OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS) OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
enum {
VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT,
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT,
VIRTIO_PCI_FLAG_DISABLE_LEGACY_BIT,
VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT,
VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT,
VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT,
VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT,
};
/* Need to activate work-arounds for buggy guests at vmstate load. */ /* Need to activate work-arounds for buggy guests at vmstate load. */
#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT 0
#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION \ #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION \
(1 << VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT) (1 << VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT)
/* Performance improves when virtqueue kick processing is decoupled from the /* Performance improves when virtqueue kick processing is decoupled from the
* vcpu thread using ioeventfd for some devices. */ * vcpu thread using ioeventfd for some devices. */
#define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
#define VIRTIO_PCI_FLAG_USE_IOEVENTFD (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT) #define VIRTIO_PCI_FLAG_USE_IOEVENTFD (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
/* virtio version flags */ /* virtio version flags */
#define VIRTIO_PCI_FLAG_DISABLE_LEGACY_BIT 2
#define VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT 3
#define VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT 6
#define VIRTIO_PCI_FLAG_DISABLE_LEGACY (1 << VIRTIO_PCI_FLAG_DISABLE_LEGACY_BIT) #define VIRTIO_PCI_FLAG_DISABLE_LEGACY (1 << VIRTIO_PCI_FLAG_DISABLE_LEGACY_BIT)
#define VIRTIO_PCI_FLAG_DISABLE_MODERN (1 << VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT) #define VIRTIO_PCI_FLAG_DISABLE_MODERN (1 << VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT)
#define VIRTIO_PCI_FLAG_DISABLE_PCIE (1 << VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT) #define VIRTIO_PCI_FLAG_DISABLE_PCIE (1 << VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT)
/* migrate extra state */ /* migrate extra state */
#define VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT 4
#define VIRTIO_PCI_FLAG_MIGRATE_EXTRA (1 << VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT) #define VIRTIO_PCI_FLAG_MIGRATE_EXTRA (1 << VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT)
/* have pio notification for modern device ? */ /* have pio notification for modern device ? */
#define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT 5
#define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY \ #define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY \
(1 << VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT) (1 << VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT)