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authorDavid Hildenbrand <david@redhat.com>2020-05-07 16:01:27 +0200
committerMichael S. Tsirkin <mst@redhat.com>2020-06-04 15:36:52 -0400
commitf2af6d3978d74a7891d0f428537b4494498202cb (patch)
tree0083bf6c5530652e7157cd466879385b7883e30d /include/uapi
parentdfb0b2e46d04d0b58754426184571a959bf30dce (diff)
virtio-mem: Allow to specify an ACPI PXM as nid
We want to allow to specify (similar as for a DIMM), to which node a virtio-mem device (and, therefore, its memory) belongs. Add a new virtio-mem feature flag and export pxm_to_node, so it can be used in kernel module context. Acked-by: Michal Hocko <mhocko@suse.com> # for the export Acked-by: "Rafael J. Wysocki" <rafael@kernel.org> # for the export Acked-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Tested-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Len Brown <lenb@kernel.org> Cc: linux-acpi@vger.kernel.org Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20200507140139.17083-4-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/linux/virtio_mem.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/uapi/linux/virtio_mem.h b/include/uapi/linux/virtio_mem.h
index 1bfade78bdfd..e0a9dc7397c3 100644
--- a/include/uapi/linux/virtio_mem.h
+++ b/include/uapi/linux/virtio_mem.h
@@ -83,6 +83,12 @@
* device is busy.
*/
+/* --- virtio-mem: feature bits --- */
+
+/* node_id is an ACPI PXM and is valid */
+#define VIRTIO_MEM_F_ACPI_PXM 0
+
+
/* --- virtio-mem: guest -> host requests --- */
/* request to plug memory blocks */
@@ -177,7 +183,9 @@ struct virtio_mem_resp {
struct virtio_mem_config {
/* Block size and alignment. Cannot change. */
__u32 block_size;
- __u32 padding;
+ /* Valid with VIRTIO_MEM_F_ACPI_PXM. Cannot change. */
+ __u16 node_id;
+ __u16 padding;
/* Start address of the memory region. Cannot change. */
__u64 addr;
/* Region size (maximum). Cannot change. */