[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Consuming PCI device in PV kernel
Hello Andrew, >>>>> Looking at the code I can't see where bit 22 is being set! >>>> Without seeing you code I've no idea about this (even if I could see it, >>>> I dunno...) >>> Bit 22 is being set in Xen code. >> Hopefully someone who knows the x86 PV stuff can chime in then, I looked >> but can't see what this represents. > I suspect this would be: > /* Bit 22 of a 24-bit flag mask. This corresponds to bit 62 of a pte.*/ > #define _PAGE_GNTTAB (1U<<22) > from include/asm-x86/x86_64/page.h > So you are attempting to update a pte which already has a granted page > in it. That's weird as I have only one domU running, so nothing else could have claimed the PCI memory area. The PCI has been passed through as I see the mapping in xenstore. Should I be using a different hypercall to gain access to this memory area? -- Best regards, Simon mailto:furryfuttock@xxxxxxxxx _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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