From: Alex Nixon <alex.nixon@xxxxxxxxxx>
Xen may want to enable scanning of all pci functions - if for example
the device at function 0 is not passed through to the guest, but the
device at function 1 is.
[Impact: allow passthrough of just some PCI functions.]
Signed-off-by: Alex Nixon <alex.nixon@xxxxxxxxxx>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Reviewed-by: "H. Peter Anvin" <hpa@xxxxxxxxx>
Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
---
arch/x86/include/asm/pci.h | 8 +++++++-
arch/x86/pci/common.c | 1 +
2 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index b51a1e8..092706e 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -21,6 +21,7 @@ struct pci_sysdata {
extern int pci_routeirq;
extern int noioapicquirk;
extern int noioapicreroute;
+extern int pci_scan_all_fns;
/* scan a bus after allocating a pci_sysdata for it */
extern struct pci_bus *pci_scan_bus_on_node(int busno, struct
pci_ops *ops, @@ -48,7 +49,11 @@ extern unsigned int
pcibios_assign_all_busses(void); #else
#define pcibios_assign_all_busses() 0
#endif
-#define pcibios_scan_all_fns(a, b) 0
+
+static inline int pcibios_scan_all_fns(struct pci_bus *bus, int
devfn) +{
+ return pci_scan_all_fns;
+}
extern unsigned long pci_mem_start;
#define PCIBIOS_MIN_IO 0x1000
@@ -130,6 +135,7 @@ extern void pci_iommu_alloc(void);
/* generic pci stuff */
#include <asm-generic/pci.h>
+#undef pcibios_scan_all_fns
