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.
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| @@ -83,6 +83,12 @@ · 82 unmodified lines | ||
| 83 | 83 | * device is busy. |
| 84 | 84 | */ |
| 85 | 85 | |
| 86 | +/* --- virtio-mem: feature bits --- */ | |
| 87 | + | |
| 88 | +/* node_id is an ACPI PXM and is valid */ | |
| 89 | +#define VIRTIO_MEM_F_ACPI_PXM 0 | |
| 90 | + | |
| 91 | + | |
| 86 | 92 | /* --- virtio-mem: guest -> host requests --- */ |
| 87 | 93 | |
| 88 | 94 | /* request to plug memory blocks */ |
| @@ -177,7 +183,9 @@ struct virtio_mem_resp { · 88 unmodified lines | ||
| 177 | 183 | struct virtio_mem_config { |
| 178 | 184 | /* Block size and alignment. Cannot change. */ |
| 179 | 185 | __u32 block_size; |
| 180 | − __u32 padding; | |
| 186 | + /* Valid with VIRTIO_MEM_F_ACPI_PXM. Cannot change. */ | |
| 187 | + __u16 node_id; | |
| 188 | + __u16 padding; | |
| 181 | 189 | /* Start address of the memory region. Cannot change. */ |
| 182 | 190 | __u64 addr; |
| 183 | 191 | /* Region size (maximum). Cannot change. */ |