[PATCH 8/9] kvm tools: Use dynamic IO port allocation in virtio-net driver

[Sasha Levin]

Signed-off-by: Sasha Levin <levinsasha...@gmail.com>
---
 tools/kvm/virtio/net.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/tools/kvm/virtio/net.c b/tools/kvm/virtio/net.c
index 649bc0f..765ae56d 100644
--- a/tools/kvm/virtio/net.c
+++ b/tools/kvm/virtio/net.c
@@ -37,7 +37,6 @@ static struct pci_device_header pci_header = {
        .class                          = 0x020000,
        .subsys_vendor_id               = 
PCI_SUBSYSTEM_VENDOR_ID_REDHAT_QUMRANET,
        .subsys_id                      = VIRTIO_ID_NET,
-       .bar[0]                         = IOPORT_VIRTIO_NET | 
PCI_BASE_ADDRESS_SPACE_IO,
 };
 
 struct net_device {
@@ -51,6 +50,7 @@ struct net_device {
        u8                              status;
        u8                              isr;
        u16                             queue_selector;
+       u16                             base_addr;
 
        pthread_t                       io_rx_thread;
        pthread_mutex_t                 io_rx_lock;
@@ -166,7 +166,7 @@ static bool virtio_net_pci_io_device_specific_in(void 
*data, unsigned long offse
 
 static bool virtio_net_pci_io_in(struct kvm *kvm, u16 port, void *data, int 
size, u32 count)
 {
-       unsigned long   offset  = port - IOPORT_VIRTIO_NET;
+       unsigned long   offset  = port - ndev.base_addr;
        bool            ret     = true;
 
        mutex_lock(&ndev.mutex);
@@ -230,7 +230,7 @@ static void virtio_net_handle_callback(struct kvm *kvm, u16 
queue_index)
 
 static bool virtio_net_pci_io_out(struct kvm *kvm, u16 port, void *data, int 
size, u32 count)
 {
-       unsigned long   offset          = port - IOPORT_VIRTIO_NET;
+       unsigned long   offset          = port - ndev.base_addr;
        bool            ret             = true;
 
        mutex_lock(&ndev.mutex);
@@ -387,14 +387,19 @@ void virtio_net__init(const struct virtio_net_parameters 
*params)
 {
        if (virtio_net__tap_init(params)) {
                u8 dev, line, pin;
+               u16 net_base_addr;
 
                if (irq__register_device(VIRTIO_ID_NET, &dev, &pin, &line) < 0)
                        return;
 
                pci_header.irq_pin      = pin;
                pci_header.irq_line     = line;
+               net_base_addr           = ioport__find_free_range();
+               pci_header.bar[0]       = net_base_addr | 
PCI_BASE_ADDRESS_SPACE_IO;
+               ndev.base_addr          = net_base_addr;
+
                pci__register(&pci_header, dev);
-               ioport__register(IOPORT_VIRTIO_NET, &virtio_net_io_ops, 
IOPORT_VIRTIO_NET_SIZE);
+               ioport__register(net_base_addr, &virtio_net_io_ops, 
IOPORT_SIZE);
 
                virtio_net__io_thread_init(params->kvm);
        }
-- 
1.7.5.rc3

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