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authorYinghai Lu <yhlu.kernel@gmail.com>2008-04-13 04:41:58 -0400
committerIngo Molnar <mingo@elte.hu>2008-04-26 17:41:04 -0400
commite8ee6f0ae5cd860e8e6c02807edfa3c1fa01bcb5 (patch)
tree800e742a999207617506a9475dc40e3c6234d11a /lib
parentcbf9bd603ab1fc4d2ecb1c6a4b7bd1cc50a7e82a (diff)
x86: work around io allocation overlap of HT links
normally BIOSes assign io/mmio range to different HT links without overlapping, even same node same link should get non overlapping entries. but Rafael L. Wysocki's buggy BIOS creates a link with overlapping entries for mmio and io: node 0 link 0: io port [1000, ffffff] node 0 link 0: mmio [e0000000, efffffff] node 0 link 0: mmio [a0000, bffff] node 0 link 0: mmio [80000000, ffffffff] try to merge them and we will get: bus: [00, ff] on node 0 link 0 bus: 00 index 0 io port: [0, ffff] bus: 00 index 1 mmio: [80000000, fcffffffff] bus: 00 index 2 mmio: [a0000, bffff] so later we will reduce the chance to assign used resource to unassigned device. Reported-by: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Tested-by: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'lib')
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