diff options
Diffstat (limited to 'drivers/acpi/numa')
| -rw-r--r-- | drivers/acpi/numa/srat.c | 64 |
1 files changed, 60 insertions, 4 deletions
diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c index b8795fc49097..3b818ab186be 100644 --- a/drivers/acpi/numa/srat.c +++ b/drivers/acpi/numa/srat.c @@ -254,9 +254,8 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) } if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0) goto out_err; - hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE; - if (hotpluggable && !IS_ENABLED(CONFIG_MEMORY_HOTPLUG)) - goto out_err; + hotpluggable = IS_ENABLED(CONFIG_MEMORY_HOTPLUG) && + (ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE); start = ma->base_address; end = start + ma->length; @@ -298,6 +297,47 @@ out_err_bad_srat: out_err: return -EINVAL; } + +static int __init acpi_parse_cfmws(union acpi_subtable_headers *header, + void *arg, const unsigned long table_end) +{ + struct acpi_cedt_cfmws *cfmws; + int *fake_pxm = arg; + u64 start, end; + int node; + + cfmws = (struct acpi_cedt_cfmws *)header; + start = cfmws->base_hpa; + end = cfmws->base_hpa + cfmws->window_size; + + /* Skip if the SRAT already described the NUMA details for this HPA */ + node = phys_to_target_node(start); + if (node != NUMA_NO_NODE) + return 0; + + node = acpi_map_pxm_to_node(*fake_pxm); + + if (node == NUMA_NO_NODE) { + pr_err("ACPI NUMA: Too many proximity domains while processing CFMWS.\n"); + return -EINVAL; + } + + if (numa_add_memblk(node, start, end) < 0) { + /* CXL driver must handle the NUMA_NO_NODE case */ + pr_warn("ACPI NUMA: Failed to add memblk for CFMWS node %d [mem %#llx-%#llx]\n", + node, start, end); + } + + /* Set the next available fake_pxm value */ + (*fake_pxm)++; + return 0; +} +#else +static int __init acpi_parse_cfmws(union acpi_subtable_headers *header, + void *arg, const unsigned long table_end) +{ + return 0; +} #endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */ static int __init acpi_parse_slit(struct acpi_table_header *table) @@ -442,7 +482,7 @@ acpi_table_parse_srat(enum acpi_srat_type id, int __init acpi_numa_init(void) { - int cnt = 0; + int i, fake_pxm, cnt = 0; if (acpi_disabled) return -EINVAL; @@ -478,6 +518,22 @@ int __init acpi_numa_init(void) /* SLIT: System Locality Information Table */ acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); + /* + * CXL Fixed Memory Window Structures (CFMWS) must be parsed + * after the SRAT. Create NUMA Nodes for CXL memory ranges that + * are defined in the CFMWS and not already defined in the SRAT. + * Initialize a fake_pxm as the first available PXM to emulate. + */ + + /* fake_pxm is the next unused PXM value after SRAT parsing */ + for (i = 0, fake_pxm = -1; i < MAX_NUMNODES - 1; i++) { + if (node_to_pxm_map[i] > fake_pxm) + fake_pxm = node_to_pxm_map[i]; + } + fake_pxm++; + acpi_table_parse_cedt(ACPI_CEDT_TYPE_CFMWS, acpi_parse_cfmws, + &fake_pxm); + if (cnt < 0) return cnt; else if (!parsed_numa_memblks) |