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powerpc/pseries: Force 32 bit MSIs for devices that require it

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The following patch implements a new PAPR change which allows
the OS to force the use of 32 bit MSIs, regardless of what
the PCI capabilities indicate. This is required for some
devices that advertise support for 64 bit MSIs but don't
actually support them.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Brian King
2013-05-03 11:30:59 +00:00
committed by Benjamin Herrenschmidt
parent c2fd22df89
commit e61133dda4
2 changed files with 20 additions and 3 deletions
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2
arch/powerpc/include/asm/pci-bridge.h
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@@ -163,6 +163,8 @@ struct pci_dn {
int pci_ext_config_space; /* for pci devices */
int force_32bit_msi:1;
struct pci_dev *pcidev; /* back-pointer to the pci device */
#ifdef CONFIG_EEH
struct eeh_dev *edev; /* eeh device */