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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-25 12:41:44 +0200 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-25 12:41:44 +0200 |
| commit | 3d24bbd7dddbea54358a9795abaf051b0f18973c (patch) | |
| tree | 3c93cf1e6884e88d5f84699e8ef9a789c357a516 /drivers | |
| parent | arm,arm64: do not always merge biovec if we are running on Xen (diff) | |
| download | linux-3d24bbd7dddbea54358a9795abaf051b0f18973c.tar.xz linux-3d24bbd7dddbea54358a9795abaf051b0f18973c.zip | |
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')
| -rw-r--r-- | drivers/xen/grant-table.c | 19 |
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(); |