virtio_pmem: populate numa information

Compute the numa information for a virtio_pmem device from the memory
range of the device. Previously, the target_node was always 0 since
the ndr_desc.target_node field was never explicitly set. The code for
computing the numa node is taken from cxl_pmem_region_probe in
drivers/cxl/pmem.c.

Signed-off-by: Michael Sammler <sammler@google.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Tested-by: Mina Almasry <almasrymina@google.com>
Message-Id: <20221115214036.1571015-1-sammler@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/nvdimm/virtio_pmem.c b/drivers/nvdimm/virtio_pmem.c
index 20da455..a92eb17 100644 (file)
--- a/drivers/nvdimm/virtio_pmem.c
+++ b/drivers/nvdimm/virtio_pmem.c
@@ -32,7 +32,6 @@ static int init_vq(struct virtio_pmem *vpmem)
 static int virtio_pmem_probe(struct virtio_device *vdev)
 {
        struct nd_region_desc ndr_desc = {};
-       int nid = dev_to_node(&vdev->dev);
        struct nd_region *nd_region;
        struct virtio_pmem *vpmem;
        struct resource res;
@@ -79,7 +78,15 @@ static int virtio_pmem_probe(struct virtio_device *vdev)
        dev_set_drvdata(&vdev->dev, vpmem->nvdimm_bus);
 
        ndr_desc.res = &res;
-       ndr_desc.numa_node = nid;
+
+       ndr_desc.numa_node = memory_add_physaddr_to_nid(res.start);
+       ndr_desc.target_node = phys_to_target_node(res.start);
+       if (ndr_desc.target_node == NUMA_NO_NODE) {
+               ndr_desc.target_node = ndr_desc.numa_node;
+               dev_dbg(&vdev->dev, "changing target node from %d to %d",
+                       NUMA_NO_NODE, ndr_desc.target_node);
+       }
+
        ndr_desc.flush = async_pmem_flush;
        ndr_desc.provider_data = vdev;
        set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);