qemu/0114-pcie_aer-clear-cmask-for-Advanced-Error-Interrupt-Me.patch

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2012-10-28 18:05:07 +00:00
From 89df4609568433f67999c27f9b9cd12e91a7d0b5 Mon Sep 17 00:00:00 2001
From: Jason Baron <jbaron@redhat.com>
Date: Tue, 4 Sep 2012 16:22:46 -0400
Subject: [PATCH] pcie_aer: clear cmask for Advanced Error Interrupt Message
Number
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>
(cherry picked from commit 0e180d9c8a7429c55d23d2e7855f1e490a063aaa)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
hw/pcie_aer.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/pcie_aer.c b/hw/pcie_aer.c
index 3b6981c..b04c164 100644
--- a/hw/pcie_aer.c
+++ b/hw/pcie_aer.c
@@ -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)