David Vrabel b7dd0e350e x86/xen: safely map and unmap grant frames when in atomic context ... arch_gnttab_map_frames() and arch_gnttab_unmap_frames() are called in atomic context but were calling alloc_vm_area() which might sleep. Also, if a driver attempts to allocate a grant ref from an interrupt and the table needs expanding, then the CPU may already by in lazy MMU mode and apply_to_page_range() will BUG when it tries to re-enable lazy MMU mode. These two functions are only used in PV guests. Introduce arch_gnttab_init() to allocates the virtual address space in advance. Avoid the use of apply_to_page_range() by using saving and using the array of PTE addresses from the alloc_vm_area() call (which ensures that the required page tables are pre-allocated). Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>		2014-07-30 14:22:47 +01:00
..
Makefile	xen/arm,arm64: enable SWIOTLB_XEN	2013-10-10 13:40:44 +00:00
enlighten.c	arm,arm64/xen: introduce HYPERVISOR_suspend()	2014-05-12 17:20:24 +01:00
grant-table.c	x86/xen: safely map and unmap grant frames when in atomic context	2014-07-30 14:22:47 +01:00
hypercall.S	arm: xen: implement multicall hypercall support.	2014-04-24 13:09:46 +01:00
mm.c	swiotlb-xen: use xen_alloc/free_coherent_pages	2013-10-10 13:41:10 +00:00
p2m.c	xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_override	2014-03-18 14:40:19 +00:00