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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_event.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_event.c')
| -rw-r--r-- | tools/libxc/xc_mem_event.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/tools/libxc/xc_mem_event.c b/tools/libxc/xc_mem_event.c index fcca47c764..d43a0af33e 100644 --- a/tools/libxc/xc_mem_event.c +++ b/tools/libxc/xc_mem_event.c @@ -24,7 +24,7 @@ #include "xc_private.h" int xc_mem_event_control(xc_interface *xch, domid_t domain_id, unsigned int op, - unsigned int mode, uint32_t *port, void *ring_page) + unsigned int mode, uint32_t *port) { DECLARE_DOMCTL; int rc; @@ -33,7 +33,6 @@ int xc_mem_event_control(xc_interface *xch, domid_t domain_id, unsigned int op, domctl.domain = domain_id; domctl.u.mem_event_op.op = op; domctl.u.mem_event_op.mode = mode; - domctl.u.mem_event_op.ring_addr = (unsigned long) ring_page; rc = do_domctl(xch, &domctl); if ( !rc && port ) |