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pci-assign: Add MSI affinity support 

To support guest MSI affinity changes update the MSI message any time
the guest writes to the address or data fields.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20130513201840.5430.86331.stgit@bling.home
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Alex Williamson 2013-05-13 14:20:02 -06:00 committed by Anthony Liguori
parent 644c98587d
commit 3459f01b2d
1 changed files with 18 additions and 0 deletions
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18
hw/i386/kvm/pci-assign.c
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@ -1026,6 +1026,21 @@ static void assigned_dev_update_msi(PCIDevice *pci_dev)
}
}
static void assigned_dev_update_msi_msg(PCIDevice *pci_dev)
{
AssignedDevice *assigned_dev = DO_UPCAST(AssignedDevice, dev, pci_dev);
uint8_t ctrl_byte = pci_get_byte(pci_dev->config + pci_dev->msi_cap +
PCI_MSI_FLAGS);
if (assigned_dev->assigned_irq_type != ASSIGNED_IRQ_MSI ||
!(ctrl_byte & PCI_MSI_FLAGS_ENABLE)) {
return;
}
kvm_irqchip_update_msi_route(kvm_state, assigned_dev->msi_virq[0],
msi_get_message(pci_dev, 0));
}
static bool assigned_dev_msix_masked(MSIXTableEntry *entry)
{
return (entry->ctrl & cpu_to_le32(0x1)) != 0;
@ -1201,6 +1216,9 @@ static void assigned_dev_pci_write_config(PCIDevice *pci_dev, uint32_t address,
if (range_covers_byte(address, len,
pci_dev->msi_cap + PCI_MSI_FLAGS)) {
assigned_dev_update_msi(pci_dev);
} else if (ranges_overlap(address, len, /* 32bit MSI only */
pci_dev->msi_cap + PCI_MSI_ADDRESS_LO, 6)) {
assigned_dev_update_msi_msg(pci_dev);
}
}
if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {