view xen/include/asm-x86/iocap.h @ 15812:86a154e1ef5d

[HVM] Shadow: don't shadow the p2m table.
For HVM vcpus with paging disabled, we used to shadow the p2m table,
and skip the p2m lookup to go from gfn to mfn. Instead, we now
provide a simple pagetable that gives a one-to-one mapping of 4GB, and
shadow that, making the translations from gfn to mfn via the p2m.
This removes the paging-disabled special-case code from the shadow
fault handler, and allows us to expand the p2m interface, since all HVM
translations now go through the same p2m lookups.
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>
author Tim Deegan <Tim.Deegan@xensource.com>
date Fri Aug 31 11:06:22 2007 +0100 (2007-08-31)
parents d966b7a00959
children 92557a0b021f
line source
1 /******************************************************************************
2 * iocap.h
3 *
4 * Architecture-specific per-domain I/O capabilities.
5 */
7 #ifndef __X86_IOCAP_H__
8 #define __X86_IOCAP_H__
10 #define ioports_permit_access(d, s, e) \
11 rangeset_add_range((d)->arch.ioport_caps, s, e)
12 #define ioports_deny_access(d, s, e) \
13 rangeset_remove_range((d)->arch.ioport_caps, s, e)
14 #define ioports_access_permitted(d, s, e) \
15 rangeset_contains_range((d)->arch.ioport_caps, s, e)
17 #define cache_flush_permitted(d) \
18 (!rangeset_is_empty((d)->iomem_caps))
20 #endif /* __X86_IOCAP_H__ */