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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/xc_mem_access.c | |
| 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/xc_mem_access.c')
| -rw-r--r-- | tools/libxc/xc_mem_access.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/libxc/xc_mem_access.c b/tools/libxc/xc_mem_access.c index a3786025f5..01fcf41a40 100644 --- a/tools/libxc/xc_mem_access.c +++ b/tools/libxc/xc_mem_access.c @@ -25,7 +25,7 @@ int xc_mem_access_enable(xc_interface *xch, domid_t domain_id, - uint32_t *port, void *ring_page) + uint32_t *port) { if ( !port ) { @@ -36,7 +36,7 @@ int xc_mem_access_enable(xc_interface *xch, domid_t domain_id, return xc_mem_event_control(xch, domain_id, XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE, XEN_DOMCTL_MEM_EVENT_OP_ACCESS, - port, ring_page); + port); } int xc_mem_access_disable(xc_interface *xch, domid_t domain_id) @@ -44,7 +44,7 @@ int xc_mem_access_disable(xc_interface *xch, domid_t domain_id) return xc_mem_event_control(xch, domain_id, XEN_DOMCTL_MEM_EVENT_OP_ACCESS_DISABLE, XEN_DOMCTL_MEM_EVENT_OP_ACCESS, - NULL, NULL); + NULL); } int xc_mem_access_resume(xc_interface *xch, domid_t domain_id, unsigned long gfn) |