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| author |   David Vrabel <david.vrabel@citrix.com> | 2011-09-29 16:53:32 +0100 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-11-16 12:13:08 -0500 |
| commit | cd12909cb576d37311fe35868780e82d5007d0c8 (patch) | |
| tree | 70ec60af4feb32087f542a838fe4dce8717f0cd6 /arch/x86 | |
| parent | Linux 3.2-rc1 (diff) | |
| download | linux-dev-cd12909cb576d37311fe35868780e82d5007d0c8.tar.xz linux-dev-cd12909cb576d37311fe35868780e82d5007d0c8.zip | |
xen: map foreign pages for shared rings by updating the PTEs directly
When mapping a foreign page with xenbus_map_ring_valloc() with the
GNTTABOP_map_grant_ref hypercall, set the GNTMAP_contains_pte flag and
pass a pointer to the PTE (in init_mm).
After the page is mapped, the usual fault mechanism can be used to
update additional MMs. This allows the vmalloc_sync_all() to be
removed from alloc_vm_area().
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
[v1: Squashed fix by Michal for no-mmu case]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/xen/grant-table.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c index 6bbfd7ac5e81..5a40d24ba331 100644 --- a/arch/x86/xen/grant-table.c +++ b/arch/x86/xen/grant-table.c @@ -71,7 +71,7 @@ int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes, if (shared == NULL) { struct vm_struct *area = - alloc_vm_area(PAGE_SIZE * max_nr_gframes); + alloc_vm_area(PAGE_SIZE * max_nr_gframes, NULL); BUG_ON(area == NULL); shared = area->addr; *__shared = shared; |