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pcie_aer: clear cmask for Advanced Error Interrupt Message Number

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The Advanced Error Interrupt Message Number (bits 31:27 of the Root
Error Status Register) is updated when the number of msi messages assigned to a
device changes. Migration of windows 7 on q35 chipset failed because the check
in get_pci_config_device() fails due to cmask being set on these bits. Its valid
to update these bits and we must restore this state across migration.

Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Baron 2012-09-04 16:22:46 -04:00 committed by Michael S. Tsirkin
parent 1de5345927
commit 0e180d9c8a
1 changed files with 5 additions and 0 deletions
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hw/pcie_aer.c
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@ -738,6 +738,11 @@ void pcie_aer_root_init(PCIDevice *dev)
PCI_ERR_ROOT_CMD_EN_MASK);
pci_set_long(dev->w1cmask + pos + PCI_ERR_ROOT_STATUS,
PCI_ERR_ROOT_STATUS_REPORT_MASK);
/* PCI_ERR_ROOT_IRQ is RO but devices change it using a
* device-specific method.
*/
pci_set_long(dev->cmask + pos + PCI_ERR_ROOT_STATUS,
~PCI_ERR_ROOT_IRQ);
}
void pcie_aer_root_reset(PCIDevice *dev)