Commit c0b1905b authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by Anthony Liguori
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qemu/pci: reset device registers on bus reset 



Reset BARs and a couple of other registers on bus reset, as per PCI
spec.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent 5330de09

hw/pci.c

+13 −0
Original line number Diff line number Diff line
@@ -92,7 +92,20 @@ static inline int pci_bar(int reg) 


static void pci_device_reset(PCIDevice *dev)

{

    int r;



    memset(dev->irq_state, 0, sizeof dev->irq_state);

    dev->config[PCI_COMMAND] &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY |

                                  PCI_COMMAND_MASTER);

    dev->config[PCI_CACHE_LINE_SIZE] = 0x0;

    dev->config[PCI_INTERRUPT_LINE] = 0x0;

    for (r = 0; r < PCI_NUM_REGIONS; ++r) {

        if (!dev->io_regions[r].size) {

            continue;

        }

        pci_set_long(dev->config + pci_bar(r), dev->io_regions[r].type);

    }

    pci_update_mappings(dev);

}



static void pci_bus_reset(void *opaque)