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| author | Nico Huber <nico.huber@secunet.com> | 2015-10-21 15:43:41 +0200 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2015-10-22 23:04:55 +0200 |
| commit | 8193b068d49478e036c0d2ed3e3f717d767eedde (patch) | |
| tree | 198849908b318c0ad17c49936238493f6afb8af6 /src | |
| parent | 37743a913fd77fd7ef6b4bb24fadecaea7b52429 (diff) | |
| download | coreboot-8193b068d49478e036c0d2ed3e3f717d767eedde.tar.xz | |
allocator: Page align memory mapped PCI resources
To help hypervisors to assign PCI devices individually to virtualization
guests, page align dynamically allocated MMIO resources.
Tested with kontron/ktqm77 which has dynamically configured onboard
devices on the root bus and secondary buses. Booted Linux and checked
the configuration with `lspci -v`. Got the configuration through Muen's
tools which are very picky about overlapping and alignment. Booted a
Muen based system that uses many onboard devices. GMA, xHCI and one NIC
(on a secondary bus) were verified to function properly.
Change-Id: I2b7115070e1ccad64565feff025289732c3b5e66
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/12111
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/device/pci_device.c | 6 | ||||
| -rw-r--r-- | src/include/device/pci_def.h | 7 |
2 files changed, 13 insertions, 0 deletions
diff --git a/src/device/pci_device.c b/src/device/pci_device.c index f2e4d5d2c1..cf2f74f81a 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 (pci_base_address_is_memory_space(attr)) { + /* Page-align to allow individual mapping of devices. */ + if (resource->align < 12) + resource->align = 12; + } } /* diff --git a/src/include/device/pci_def.h b/src/include/device/pci_def.h index ef3427b4e7..04cf945527 100644 --- a/src/include/device/pci_def.h +++ b/src/include/device/pci_def.h @@ -78,6 +78,13 @@ #define PCI_BASE_ADDRESS_IO_ATTR_MASK 0x03 /* bit 1 is reserved if address_space = 1 */ +#ifndef __ROMCC__ +static inline int pci_base_address_is_memory_space(unsigned int attr) +{ + return (attr & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY; +} +#endif + /* Header type 0 (normal devices) */ #define PCI_CARDBUS_CIS 0x28 #define PCI_SUBSYSTEM_VENDOR_ID 0x2c |