From 3dbca8e6a7a5be52c3251ad03bf30d73301babf3 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Fri, 17 Dec 2010 12:01:49 +0000 Subject: [PATCH] virtio-pci: Rename bugs field to flags The VirtIOPCIProxy bugs field is currently used to enable workarounds for older guests. Rename it to flags so that other per-device behavior can be tracked. A later patch uses the flags field to remember whether ioeventfd should be used for virtqueue host notification. Signed-off-by: Stefan Hajnoczi Signed-off-by: Michael S. Tsirkin --- hw/virtio-pci.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index 6186142..13dd391 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -80,9 +80,8 @@ * 12 is historical, and due to x86 page size. */ #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 -/* We can catch some guest bugs inside here so we continue supporting older - guests. */ -#define VIRTIO_PCI_BUG_BUS_MASTER (1 << 0) +/* Flags track per-device state like workarounds for quirks in older guests. */ +#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0) /* QEMU doesn't strictly need write barriers since everything runs in * lock-step. We'll leave the calls to wmb() in though to make it obvious for @@ -95,7 +94,7 @@ typedef struct { PCIDevice pci_dev; VirtIODevice *vdev; - uint32_t bugs; + uint32_t flags; uint32_t addr; uint32_t class_code; uint32_t nvectors; @@ -159,7 +158,7 @@ static int virtio_pci_load_config(void * opaque, QEMUFile *f) in ready state. Then we have a buggy guest OS. */ if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) && !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { - proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER; + proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; } return 0; } @@ -185,7 +184,7 @@ static void virtio_pci_reset(DeviceState *d) VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev); virtio_reset(proxy->vdev); msix_reset(&proxy->pci_dev); - proxy->bugs = 0; + proxy->flags = 0; } static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) @@ -235,7 +234,7 @@ static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) some safety checks. */ if ((val & VIRTIO_CONFIG_S_DRIVER_OK) && !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { - proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER; + proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; } break; case VIRTIO_MSI_CONFIG_VECTOR: @@ -403,7 +402,7 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, if (PCI_COMMAND == address) { if (!(val & PCI_COMMAND_MASTER)) { - if (!(proxy->bugs & VIRTIO_PCI_BUG_BUS_MASTER)) { + if (!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { virtio_set_status(proxy->vdev, proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); } -- 2.7.4