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xen-devel
Re: [Xen-devel] Question about mmu_update
At Thu, 16 Feb 2006 13:11:40 +0100,
Simon Kagstrom wrote:
>
> At Tue, 14 Feb 2006 14:53:39 +0100,
> Simon Kagstrom wrote:
> > ------------------------------------------------------------
> > new[NR_GRANT_FRAMES].ptr = phys_to_machine(to_phys(pgdir)) + sizeof(void*)
> > * l2_table_offset(XEN_GNTTAB_START);
> > new[NR_GRANT_FRAMES].val = phys_to_machine(pgtab) | (L1_PROT & ~_PAGE_RW);
> >
> > BUG_ON(HYPERVISOR_mmu_update(new, 1, NULL, DOMID_SELF) < 0);
> > ------------------------------------------------------------
>
> I've also tried to set val to 0, and I still get the same problem:
>
> ------------------------------------------------------------
> (XEN) DOM7: (file=mm.c, line=352) Could not get page ref for pfn 921c0183
> (XEN) DOM7: (file=mm.c, line=2042) Could not get page for normal update
> ------------------------------------------------------------
>
> I'm puzzled. The pfn given there looks all wrong, and I'm not sure
> what is wrong with this code. The page directory is taken directly
> from start_info (pt_base). Does anyone see what I do wrong?
I'm sorry, my fault. The entries before NR_GRANT_FRAMES were
uninitialized... On to the next error.
// Simon
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