On XenServer on Windows machine a platform device with ID 2 instead of
1 is used.
This device is mainly identical to device 1 but due to some Windows
update behaviour it was decided to use a device with a different ID.
This causes compatibility issues with Linux which expects, if Xen
is detected, to find a Xen platform device (5853:0001) otherwise code
will crash due to some missing initialization (specifically grant
tables).
The device 2 is presented by Xapi adding device specification to
Qemu command line.
Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxx>
---
drivers/xen/platform-pci.c | 2 ++
include/linux/pci_ids.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index 544d3f9010b9..9cefc7d6bcba 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -174,6 +174,8 @@ static int platform_pci_probe(struct pci_dev *pdev,
static const struct pci_device_id platform_pci_tbl[] = {
{PCI_VENDOR_ID_XEN, PCI_DEVICE_ID_XEN_PLATFORM,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {PCI_VENDOR_ID_XEN, PCI_DEVICE_ID_XEN_PLATFORM_XS61,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{0,}
};
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 1a2594a38199..e4791fd97ee0 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -3241,6 +3241,7 @@
#define PCI_VENDOR_ID_XEN 0x5853
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
+#define PCI_DEVICE_ID_XEN_PLATFORM_XS61 0x0002
#define PCI_VENDOR_ID_OCZ 0x1b85
--
2.48.1
