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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/xenctrl.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/xenctrl.h')
| -rw-r--r-- | tools/libxc/xenctrl.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h index 823d47a2ac..b4dd9e80e0 100644 --- a/tools/libxc/xenctrl.h +++ b/tools/libxc/xenctrl.h @@ -1892,13 +1892,12 @@ int xc_tmem_restore_extra(xc_interface *xch, int dom, int fd); * mem_event operations */ 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); int xc_mem_event_memop(xc_interface *xch, domid_t domain_id, unsigned int op, unsigned int mode, uint64_t gfn, void *buffer); -int xc_mem_paging_enable(xc_interface *xch, domid_t domain_id, - uint32_t *port, void *ring_page); +int xc_mem_paging_enable(xc_interface *xch, domid_t domain_id, uint32_t *port); int xc_mem_paging_disable(xc_interface *xch, domid_t domain_id); int xc_mem_paging_nominate(xc_interface *xch, domid_t domain_id, unsigned long gfn); @@ -1907,8 +1906,7 @@ int xc_mem_paging_prep(xc_interface *xch, domid_t domain_id, unsigned long gfn); int xc_mem_paging_load(xc_interface *xch, domid_t domain_id, unsigned long gfn, void *buffer); -int xc_mem_access_enable(xc_interface *xch, domid_t domain_id, - uint32_t *port, void *ring_page); +int xc_mem_access_enable(xc_interface *xch, domid_t domain_id, uint32_t *port); int xc_mem_access_disable(xc_interface *xch, domid_t domain_id); int xc_mem_access_resume(xc_interface *xch, domid_t domain_id, unsigned long gfn); |