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authorAlex Williamson <alex.williamson@redhat.com>2013-05-13 14:20:02 -0600
committerAnthony Liguori <aliguori@us.ibm.com>2013-05-22 07:40:10 -0500
commit3459f01b2d9612070ec23221a4ccb60a41b775ae (patch)
treed6450f441bf52e030f104af2d9abbbabcd260fcc
parent644c98587d4ccc09e7592e1688e4e7fa363c5a75 (diff)
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>
-rw-r--r--hw/i386/kvm/pci-assign.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index c1e08ec1a0..ff855904ba 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -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) {