Register memory side cache attributes with the memory's node if HMAT provides the side cache iniformation table.
Signed-off-by: Keith Busch <keith.bu...@intel.com> --- drivers/acpi/hmat/hmat.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi/hmat/hmat.c index 917e6122b3f0..11f65b38e9f9 100644 --- a/drivers/acpi/hmat/hmat.c +++ b/drivers/acpi/hmat/hmat.c @@ -245,6 +245,7 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header, const unsigned long end) { struct acpi_hmat_cache *cache = (void *)header; + struct node_cache_attrs cache_attrs; u32 attrs; if (cache->header.length < sizeof(*cache)) { @@ -258,6 +259,37 @@ static __init int hmat_parse_cache(union acpi_subtable_headers *header, cache->memory_PD, cache->cache_size, attrs, cache->number_of_SMBIOShandles); + cache_attrs.size = cache->cache_size; + cache_attrs.level = (attrs & ACPI_HMAT_CACHE_LEVEL) >> 4; + cache_attrs.line_size = (attrs & ACPI_HMAT_CACHE_LINE_SIZE) >> 16; + + switch ((attrs & ACPI_HMAT_CACHE_ASSOCIATIVITY) >> 8) { + case ACPI_HMAT_CA_DIRECT_MAPPED: + cache_attrs.associativity = NODE_CACHE_DIRECT_MAP; + break; + case ACPI_HMAT_CA_COMPLEX_CACHE_INDEXING: + cache_attrs.associativity = NODE_CACHE_INDEXED; + break; + case ACPI_HMAT_CA_NONE: + default: + cache_attrs.associativity = NODE_CACHE_OTHER; + break; + } + + switch ((attrs & ACPI_HMAT_WRITE_POLICY) >> 12) { + case ACPI_HMAT_CP_WB: + cache_attrs.write_policy = NODE_CACHE_WRITE_BACK; + break; + case ACPI_HMAT_CP_WT: + cache_attrs.write_policy = NODE_CACHE_WRITE_THROUGH; + break; + case ACPI_HMAT_CP_NONE: + default: + cache_attrs.write_policy = NODE_CACHE_WRITE_OTHER; + break; + } + + node_add_cache(pxm_to_node(cache->memory_PD), &cache_attrs); return 0; } -- 2.14.4