[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] APIC handling on x86-64
As we had a report of a problem booting Xen on an IBM x460, dying on the BUG_ON() in init_apic_ldr() in xen/include/asm-x86/mach-summit/mach_apic.h, I started comparing 32- and 64-bit APIC handling. Quickly I found that the same case is handled gracefully in 64-bits, by just tying any extra CPUs to the highest bit. (I suppose, will try to verify this with the originator, that the same machine also doesn't boot with native 32-bit Linux, as the exact same issue should exist there). While doing the same generally shouldn't be a problem, I wonder why this hasn't been discovered so far and how many else differences there exist. Thanks, Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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