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pci-assign: sync MSI/MSI-X cap and table with PCIDevice 

Since commit e1d4fb2d ("kvm-irqchip: x86: add msi route notify fn"),
kvm_irqchip_add_msi_route() starts to use pci_get_msi_message() to fetch
MSI info. This requires that we setup MSI related fields in PCIDevice.
For most devices, that won't be a problem, as long as we are using
general interfaces like msi_init()/msix_init().

However, for pci-assign devices, MSI/MSI-X is treated differently - PCI
assign devices are maintaining its own MSI table and cap information in
AssignedDevice struct. however that's not synced up with PCIDevice's
fields. That will leads to pci_get_msi_message() failed to find correct
MSI capability, even with an NULL msix_table.

A quick fix is to sync up the two places: both the capability bits and
table address for MSI/MSI-X.

Reported-by: Changlimin <changlimin@h3c.com>
Tested-by: Changlimin <changlimin@h3c.com>
Cc: qemu-stable@nongnu.org
Fixes: e1d4fb2d ("kvm-irqchip: x86: add msi route notify fn")
Signed-off-by: Peter Xu <peterx@redhat.com>

Message-Id: <1480042522-16551-1-git-send-email-peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Xu 2016-11-25 10:55:22 +08:00 committed by Paolo Bonzini
parent 9e55d58806
commit 64e184e260
1 changed files with 4 additions and 0 deletions
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4
hw/i386/kvm/pci-assign.c
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@ -1251,6 +1251,7 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev, Error **errp)
error_propagate(errp, local_err);
return -ENOTSUP;
}
dev->dev.cap_present |= QEMU_PCI_CAP_MSI;
dev->cap.available |= ASSIGNED_DEVICE_CAP_MSI;
/* Only 32-bit/no-mask currently supported */
ret = pci_add_capability2(pci_dev, PCI_CAP_ID_MSI, pos, 10,
@ -1285,6 +1286,7 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev, Error **errp)
error_propagate(errp, local_err);
return -ENOTSUP;
}
dev->dev.cap_present |= QEMU_PCI_CAP_MSIX;
dev->cap.available |= ASSIGNED_DEVICE_CAP_MSIX;
ret = pci_add_capability2(pci_dev, PCI_CAP_ID_MSIX, pos, 12,
&local_err);
@ -1648,6 +1650,7 @@ static void assigned_dev_register_msix_mmio(AssignedDevice *dev, Error **errp)
dev->msix_table = NULL;
return;
}
dev->dev.msix_table = (uint8_t *)dev->msix_table;
assigned_dev_msix_reset(dev);
@ -1665,6 +1668,7 @@ static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev)
error_report("error unmapping msix_table! %s", strerror(errno));
}
dev->msix_table = NULL;
dev->dev.msix_table = NULL;
}
static const VMStateDescription vmstate_assigned_device = {