[PATCH 6/9] kvm tools: Use dynamic IO port allocation in 9p driver

Sasha Levin
2011-05-25T14:24:32Z

tools/kvm/virtio/9p.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/tools/kvm/virtio/9p.c b/tools/kvm/virtio/9p.c
index e307592..f8cb96d 100644
--- a/tools/kvm/virtio/9p.c
+++ b/tools/kvm/virtio/9p.c
@@ -50,7 +50,6 @@ static struct pci_device_header virtio_p9_pci_device = {
.class = 0x010000,
.subsys_vendor_id = PCI_SUBSYSTEM_VENDOR_ID_REDHAT_QUMRANET,
.subsys_id = VIRTIO_ID_9P,
- .bar[0] = IOPORT_VIRTIO_P9 | PCI_BASE_ADDRESS_SPACE_IO,
};

struct p9_dev {
@@ -59,6 +58,7 @@ struct p9_dev {
u16 config_vector;
u32 features;
struct virtio_9p_config *config;
+ u16 base_addr;

/* virtio queue */
u16 queue_selector;
@@ -96,7 +96,7 @@ static bool virtio_p9_pci_io_in(struct kvm *kvm, u16 port, void *data, int size,
unsigned long offset;
bool ret = true;

- offset = port - IOPORT_VIRTIO_P9;
+ offset = port - p9dev.base_addr;

switch (offset) {
case VIRTIO_PCI_HOST_FEATURES:
@@ -584,7 +584,7 @@ static bool virtio_p9_pci_io_out(struct kvm *kvm, u16 port, void *data, int size
unsigned long offset;
bool ret = true;

- offset = port - IOPORT_VIRTIO_P9;
+ offset = port - p9dev.base_addr;

switch (offset) {
case VIRTIO_MSI_QUEUE_VECTOR:
@@ -636,6 +636,7 @@ void virtio_9p__init(struct kvm *kvm, const char *root)
{
u8 pin, line, dev;
u32 i, root_len;
+ u16 p9_base_addr;

p9dev.config = calloc(1, sizeof(*p9dev.config) + sizeof(VIRTIO_P9_TAG));
if (p9dev.config == NULL)
@@ -662,7 +663,10 @@ void virtio_9p__init(struct kvm *kvm, const char *root)

virtio_p9_pci_device.irq_pin = pin;
virtio_p9_pci_device.irq_line = line;
+ p9_base_addr = ioport__find_free_range();
+ virtio_p9_pci_device.bar[0] = p9_base_addr | PCI_BASE_ADDRESS_SPACE_IO;
+ p9dev.base_addr = p9_base_addr;
pci__register(&virtio_p9_pci_device, dev);

- ioport__register(IOPORT_VIRTIO_P9, &virtio_p9_io_ops, IOPORT_VIRTIO_P9_SIZE);
+ ioport__register(p9_base_addr, &virtio_p9_io_ops, IOPORT_SIZE);
}
--
1.7.5.rc3