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| author | Tim Deegan <tim@xen.org> | 2012-03-08 16:40:05 +0000 |
|---|---|---|
| committer | Tim Deegan <tim@xen.org> | 2012-03-08 16:40:05 +0000 |
| commit | 770d1e858de56ba8f2e0d7e45c08f48d599528e5 (patch) | |
| tree | fcae677231c44b4c20c0816f41cbd51074a5412e /tools/libxc/xg_save_restore.h | |
| parent | 7a3de767373545388a9fded238b3450c5b21066d (diff) | |
| download | xen-770d1e858de56ba8f2e0d7e45c08f48d599528e5.tar.gz xen-770d1e858de56ba8f2e0d7e45c08f48d599528e5.tar.bz2 xen-770d1e858de56ba8f2e0d7e45c08f48d599528e5.zip | |
Use a reserved pfn in the guest address space to store mem event rings
This solves a long-standing issue in which the pages backing these rings were
pages belonging to dom0 user-space processes. Thus, if the process would die
unexpectedly, Xen would keep posting events to a page now belonging to some
other process.
We update all API-consumers in tree (xenpaging and xen-access).
This is an API/ABI change, so please speak up if it breaks your accumptions.
The patch touches tools, hypervisor x86/hvm bits, and hypervisor x86/mm bits.
Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Tim Deegan <tim@xen.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Tim Deegan <tim@xen.org>
Diffstat (limited to 'tools/libxc/xg_save_restore.h')
| -rw-r--r-- | tools/libxc/xg_save_restore.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/libxc/xg_save_restore.h b/tools/libxc/xg_save_restore.h index 6286b6814a..89f3504911 100644 --- a/tools/libxc/xg_save_restore.h +++ b/tools/libxc/xg_save_restore.h @@ -254,6 +254,10 @@ #define XC_SAVE_ID_COMPRESSED_DATA -12 /* Marker to indicate arrival of compressed data */ #define XC_SAVE_ID_ENABLE_COMPRESSION -13 /* Marker to enable compression logic at receiver side */ #define XC_SAVE_ID_HVM_GENERATION_ID_ADDR -14 +/* Markers for the pfn's hosting these mem event rings */ +#define XC_SAVE_ID_HVM_PAGING_RING_PFN -15 +#define XC_SAVE_ID_HVM_ACCESS_RING_PFN -16 +#define XC_SAVE_ID_HVM_SHARING_RING_PFN -17 /* ** We process save/restore/migrate in batches of pages; the below |