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| author | Ian Campbell <ian.campbell@citrix.com> | 2010-09-30 12:37:26 +0100 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-11-12 15:00:06 -0800 |
| commit | 7e77506a5918d82cafa2ffa783ab57c23f9e9817 (patch) | |
| tree | dc922c1127c8859cda50f5cbed654c5681a89480 /include/xen | |
| parent | 9ec23a7f6d2537faf14368e066e307c06812c4ca (diff) | |
| download | lwn-7e77506a5918d82cafa2ffa783ab57c23f9e9817.tar.gz lwn-7e77506a5918d82cafa2ffa783ab57c23f9e9817.zip | |
xen: implement XENMEM_machphys_mapping
This hypercall allows Xen to specify a non-default location for the
machine to physical mapping. This capability is used when running a 32
bit domain 0 on a 64 bit hypervisor to shrink the hypervisor hole to
exactly the size required.
[ Impact: add Xen hypercall definitions ]
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/interface/memory.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index d7a6c13bde69..eac3ce153719 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -141,6 +141,19 @@ struct xen_machphys_mfn_list { DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list); /* + * Returns the location in virtual address space of the machine_to_phys + * mapping table. Architectures which do not have a m2p table, or which do not + * map it by default into guest address space, do not implement this command. + * arg == addr of xen_machphys_mapping_t. + */ +#define XENMEM_machphys_mapping 12 +struct xen_machphys_mapping { + unsigned long v_start, v_end; /* Start and end virtual addresses. */ + unsigned long max_mfn; /* Maximum MFN that can be looked up. */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t); + +/* * Sets the GPFN at which a particular page appears in the specified guest's * pseudophysical address space. * arg == addr of xen_add_to_physmap_t. |