| |
|
 |
|
 |
|
|
|
| |
|
|
xen-ia64-devel
[Xen-ia64-devel] Re: [patch 2/8] Kexec: Allow page fault handler to hand
Quoting Simon Horman <horms@xxxxxxxxxxxx>:
> If the EFI region is mapped into a region within the address space usually
> used by guests, then the page_fault handler needs to know about it. A
> description of why this mapping is made is included in the patch that makes
> the mapping.
>
> The patch to actually make use of this code is separate.
>
> This does not take into account other ways that relevant functions are
> called.
>
> In particular:
> - vcpu_itc_d() and vcpu_itc_i() call translate_domain_pte()
> - ia64_shadow_fault() and vcpu_tpa() call vcpu_translate()
>
> This patch needs work, and I am positing it for discussion.
Honestly I don't really like this part of the patch: it adds complexity to an
already complex area.
EFI_[UN]CACHED_OFFSET areas are id-mapped. So why can't the tlb miss be
handled directly in the ivt (like we do for id-mapped Xen area) ?
Maybe I don't really understand the issues so do not hesitate to explain!
Tristan.
_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel
|
|
|
| |
|
Home