From 3d24bbd7dddbea54358a9795abaf051b0f18973c Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Fri, 25 Oct 2013 10:41:44 +0000 Subject: [PATCH] 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 Changes in v9: - add in-code comments. --- drivers/xen/grant-table.c | 19 +++++++++++++++++-- 1 file 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 #include #include +#include #include #include @@ -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();