Re: [Xen-devel] [PATCH 17/17] PVH xen: PVH dom0 creation....

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.04.13 at 23:26, Mukesh Rathor <mukesh.rathor@xxxxxxxxxx> wrote:
> +    /* If the e820 ended under 4GB, we must map the remaining space upto 4GB 
> */
> +    if ( end < GB(4) )
> +    {
> +        start_pfn = PFN_UP(end);
> +        end_pfn = (GB(4)) >> PAGE_SHIFT;
> +        nump = end_pfn - start_pfn;
> +        rc = domctl_memory_mapping(d, start_pfn, start_pfn, nump, 1);
> +        BUG_ON(rc);
> +    }

That's necessary, but not sufficient. Or did I overlook MMIO ranges
getting added somewhere else for Dom0, when they sit above the
highest E820 covered address?

> +    if ( is_pvh_domain(d) )
> +    {
> +        v->arch.cr3 = v->arch.hvm_vcpu.guest_cr[3] = (vpt_start - v_start);
> +
> +        /* HAP is required for PVH and pfns are serially mapped there */

sequentially?

Jan


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