[PATCH] x86/PCI: limit the size of the 64bit BAR to 256GB

[Christian KÃnig]

This avoids problems with Xen which hides some memory resources from the
OS and potentially also allows memory hotplug while this fixup is
enabled.

Signed-off-by: Christian KÃnig <christian.koenig@xxxxxxx>
---
 arch/x86/pci/fixup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index 56c39a7bd080..6dffdee8a2de 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -690,7 +690,7 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
 	res->name = "PCI Bus 0000:00";
 	res->flags = IORESOURCE_PREFETCH | IORESOURCE_MEM |
 		IORESOURCE_MEM_64 | IORESOURCE_WINDOW;
-	res->start = 0x100000000ull;
+	res->start = 0xbd00000000ull;
 	res->end = 0xfd00000000ull - 1;
 
 	/* Just grab the free area behind system memory for this */
-- 
2.11.0


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