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From: Marcel Apfelbaum <marcel@redhat.com>
To: qemu-devel@nongnu.org
Cc: marcel@redhat.com, lvivier@redhat.com, jasowang@redhat.com,
	qemu-stable@nongnu.org, mst@redhat.com
Subject: [Qemu-devel] [PATCH 2/2] hw/virtio: group virtio flags into an enum
Date: Wed, 10 Feb 2016 14:22:21 +0200	[thread overview]
Message-ID: <1455106941-2934-3-git-send-email-marcel@redhat.com> (raw)
In-Reply-To: <1455106941-2934-1-git-send-email-marcel@redhat.com>

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

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
---
 hw/virtio/virtio-pci.h | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index 6686b10..817bcde 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -58,6 +58,16 @@ typedef struct VirtioBusClass VirtioPCIBusClass;
 #define VIRTIO_PCI_BUS_CLASS(klass) \
         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. */
 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT  0
 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION \
@@ -65,23 +75,17 @@ typedef struct VirtioBusClass VirtioPCIBusClass;
 
 /* Performance improves when virtqueue kick processing is decoupled from the
  * 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)
 
 /* 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_MODERN (1 << VIRTIO_PCI_FLAG_DISABLE_MODERN_BIT)
 #define VIRTIO_PCI_FLAG_DISABLE_PCIE (1 << VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT)
 
 /* migrate extra state */
-#define VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT 4
 #define VIRTIO_PCI_FLAG_MIGRATE_EXTRA (1 << VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT)
 
 /* have pio notification for modern device ? */
-#define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT 5
 #define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY \
     (1 << VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT)
 
-- 
2.4.3

  parent reply	other threads:[~2016-02-10 12:22 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-10 12:22 [Qemu-devel] [PATCH 0/2] hw/virtio: fix double use of a virtio flag Marcel Apfelbaum
2016-02-10 12:22 ` [Qemu-devel] [PATCH 1/2] " Marcel Apfelbaum
2016-02-10 12:57   ` Laurent Vivier
2016-02-10 13:19   ` Laurent Vivier
2016-02-23  3:34   ` Jason Wang
2016-02-10 12:22 ` Marcel Apfelbaum [this message]
2016-02-10 13:07   ` [Qemu-devel] [PATCH 2/2] hw/virtio: group virtio flags into an enum Laurent Vivier
2016-02-10 13:24     ` Marcel Apfelbaum
2016-02-23  3:39   ` Jason Wang

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