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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-10-25 10:41:44 +0000
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2013-10-25 10:41:44 +0000
commit3d24bbd7dddbea54358a9795abaf051b0f18973c (patch)
tree3c93cf1e6884e88d5f84699e8ef9a789c357a516 /drivers/xen/grant-table.c
parent3d1975b57097820c131c692d2e0d075641370369 (diff)
grant-table: call set_phys_to_machine after mapping grant refs
When mapping/unmapping grant refs, call set_phys_to_machine to update the P2M with the new mappings for autotranslate guests. This is (almost) a nop on x86. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Changes in v9: - add in-code comments.
Diffstat (limited to 'drivers/xen/grant-table.c')
-rw-r--r--drivers/xen/grant-table.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index c4d2298893b1..62ccf5424ba8 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -49,6 +49,7 @@
#include <xen/grant_table.h>
#include <xen/interface/memory.h>
#include <xen/hvc-console.h>
+#include <xen/swiotlb-xen.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/interface.h>
@@ -898,8 +899,16 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, map_ops + i,
&map_ops[i].status, __func__);
- if (xen_feature(XENFEAT_auto_translated_physmap))
+ /* this is basically a nop on x86 */
+ if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ for (i = 0; i < count; i++) {
+ if (map_ops[i].status)
+ continue;
+ set_phys_to_machine(map_ops[i].host_addr >> PAGE_SHIFT,
+ map_ops[i].dev_bus_addr >> PAGE_SHIFT);
+ }
return ret;
+ }
if (!in_interrupt() && paravirt_get_lazy_mode() == PARAVIRT_LAZY_NONE) {
arch_enter_lazy_mmu_mode();
@@ -942,8 +951,14 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
if (ret)
return ret;
- if (xen_feature(XENFEAT_auto_translated_physmap))
+ /* this is basically a nop on x86 */
+ if (xen_feature(XENFEAT_auto_translated_physmap)) {
+ for (i = 0; i < count; i++) {
+ set_phys_to_machine(unmap_ops[i].host_addr >> PAGE_SHIFT,
+ INVALID_P2M_ENTRY);
+ }
return ret;
+ }
if (!in_interrupt() && paravirt_get_lazy_mode() == PARAVIRT_LAZY_NONE) {
arch_enter_lazy_mmu_mode();