diff options
| author | Alex Williamson <alex.williamson@redhat.com> | 2013-05-13 14:20:02 -0600 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2013-05-22 07:40:10 -0500 |
| commit | 3459f01b2d9612070ec23221a4ccb60a41b775ae (patch) | |
| tree | d6450f441bf52e030f104af2d9abbbabcd260fcc /hw/i386 | |
| parent | 644c98587d4ccc09e7592e1688e4e7fa363c5a75 (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>
Diffstat (limited to 'hw/i386')
| -rw-r--r-- | hw/i386/kvm/pci-assign.c | 18 |
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) { |