[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] xen: find a better location for the real-mode trampoline
Il 18/12/2012 14:36, Jan Beulich ha scritto: >>>> >>> No, just busy. I agree that checking all three is best. However, >>>> >>> there >>>> >>> is at least one known case where 0x40e doesn't work, so 0x413 and >>>> >>> multiboot should be enough. >>> >> >>> >> Can you provide more detail about this specific case? In >>> >> particular, what value 0x40e in fact has there? >> > >> > Sure. 0x40e did point to the beginning of the EBDA (around 635k), but >> > an option ROM was reserving memory below there by lowering 0x413. >> > That's the "on some machines" in the commit message. > That wouldn't preclude the suggested sanity-checked-minimum > solution. Yes, on the other hand [0x413] should always be less than or equal to [0x40e] << 6. Otherwise for example DOS would not work on that system. Paolo _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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