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Date: Wed, 20 Feb 2019 23:05:51 +0100 From: "Rafael J. Wysocki" <rafael@...nel.org> To: Keith Busch <keith.busch@...el.com> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, ACPI Devel Maling List <linux-acpi@...r.kernel.org>, Linux Memory Management List <linux-mm@...ck.org>, Linux API <linux-api@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rafael Wysocki <rafael@...nel.org>, Dave Hansen <dave.hansen@...el.com>, Dan Williams <dan.j.williams@...el.com> Subject: Re: [PATCHv6 09/10] acpi/hmat: Register memory side cache attributes On Thu, Feb 14, 2019 at 6:10 PM Keith Busch <keith.busch@...el.com> wrote: > > Register memory side cache attributes with the memory's node if HMAT > provides the side cache iniformation table. > > Signed-off-by: Keith Busch <keith.busch@...el.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.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 6833c4897ff4..e2a15f53fe45 100644 > --- a/drivers/acpi/hmat/hmat.c > +++ b/drivers/acpi/hmat/hmat.c > @@ -314,6 +314,7 @@ 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)) { > @@ -327,6 +328,37 @@ 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 >
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