diff options
| -rw-r--r-- | include/sysemu/numa.h | 1 | ||||
| -rw-r--r-- | numa.c | 41 |
2 files changed, 42 insertions, 0 deletions
diff --git a/include/sysemu/numa.h b/include/sysemu/numa.h index 7176364062..a6392bc50f 100644 --- a/include/sysemu/numa.h +++ b/include/sysemu/numa.h @@ -31,5 +31,6 @@ void query_numa_node_mem(uint64_t node_mem[]); extern QemuOptsList qemu_numa_opts; void numa_set_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node); void numa_unset_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node); +uint32_t numa_get_node(ram_addr_t addr, Error **errp); #endif @@ -97,6 +97,47 @@ static void numa_set_mem_ranges(void) } } +/* + * Check if @addr falls under NUMA @node. + */ +static bool numa_addr_belongs_to_node(ram_addr_t addr, uint32_t node) +{ + struct numa_addr_range *range; + + QLIST_FOREACH(range, &numa_info[node].addr, entry) { + if (addr >= range->mem_start && addr <= range->mem_end) { + return true; + } + } + return false; +} + +/* + * Given an address, return the index of the NUMA node to which the + * address belongs to. + */ +uint32_t numa_get_node(ram_addr_t addr, Error **errp) +{ + uint32_t i; + + /* For non NUMA configurations, check if the addr falls under node 0 */ + if (!nb_numa_nodes) { + if (numa_addr_belongs_to_node(addr, 0)) { + return 0; + } + } + + for (i = 0; i < nb_numa_nodes; i++) { + if (numa_addr_belongs_to_node(addr, i)) { + return i; + } + } + + error_setg(errp, "Address 0x" RAM_ADDR_FMT " doesn't belong to any " + "NUMA node", addr); + return -1; +} + static void numa_node_parse(NumaNodeOptions *node, QemuOpts *opts, Error **errp) { uint16_t nodenr; |