[coreboot-gerrit] New patch to review for coreboot: allocator: Page align memory mapped PCI resources

[Nico Huber (nico.h@gmx.de)]

Nico Huber (nico.h at gmx.de) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/12111

-gerrit

commit ad89912085b9f5f03dc37f7f6efaee520b3b5319
Author: Nico Huber <nico.huber at secunet.com>
Date:   Wed Oct 21 15:43:41 2015 +0200

    allocator: Page align memory mapped PCI resources
    
    To help hypervisors to assign PCI devices individually to virtualization
    guests, page align dynamically allocated MMIO resources.
    
    Change-Id: I2b7115070e1ccad64565feff025289732c3b5e66
    Signed-off-by: Nico Huber <nico.huber at secunet.com>
---
 src/device/pci_device.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/device/pci_device.c b/src/device/pci_device.c
index f2e4d5d..97540a6 100644
--- a/src/device/pci_device.c
+++ b/src/device/pci_device.c
@@ -211,6 +211,12 @@ struct resource *pci_get_resource(struct device *dev, unsigned long index)
 			resource->gran += 1;
 		}
 		resource->limit = limit = moving | (resource->size - 1);
+
+		if ((attr & PCI_BASE_ADDRESS_SPACE) == 0 &&
+		    resource->align < 12)
+			/* At least page align to allow
+			   individual mapping of devices. */
+			resource->align = 12;
 	}
 
 	/*