linux-toradex.git/drivers/acpi/numa.c, branch v4.4.95

ACPI / SRAT: fix SRAT parsing order with both LAPIC and X2APIC present

2016-09-07T06:32:45+00:00

commit 702b07fcc9b264c9afd372676bbdd50a762dcde0 upstream.

SRAT maps APIC ID to proximity domains ids (PXM). Mapping from PXM to
NUMA node ids is based on order of entries in SRAT table.
SRAT table has just LAPIC entires or mix of LAPIC and X2APIC entries.
As long as there are only LAPIC entires, mapping from proximity domain
id to NUMA node id is as assumed by BIOS. However, once APIC entries are
mixed, X2APIC entries would be first mapped which causes unexpected NUMA
node mapping.

To fix that, change parsing to check each entry against both LAPIC and
X2APIC so mapping is in the SRAT/PXM order.

This is supplemental change to the fix made by commit d81056b5278
(Handle apic/x2apic entries in MADT in correct order) and using the
mechanism introduced by 9b3fedd (ACPI / tables: Add acpi_subtable_proc
to ACPI table parsers).

Fixes: d81056b5278 (Handle apic/x2apic entries in MADT in correct order)
Signed-off-by: Lukasz Anaczkowski 
[ rjw : Subject & changelog ]
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

ACPI: Remove FSF mailing addresses

2015-07-08T00:27:32+00:00

There is no need to carry potentially outdated Free Software Foundation
mailing address in file headers since the COPYING file includes it.

Signed-off-by: Jarkko Nikula 
Signed-off-by: Rafael J. Wysocki

acpi: Add acpi_map_pxm_to_online_node()

2015-06-26T15:23:38+00:00

The kernel initializes CPU & memory's NUMA topology from ACPI
SRAT table.  Some other ACPI tables, such as NFIT and DMAR, also
contain proximity IDs for their device's NUMA topology.  This
information can be used to improve performance of these devices.

This patch introduces acpi_map_pxm_to_online_node(), which is
similar to acpi_map_pxm_to_node(), but always returns an online
node.  When the mapped node from a given proximity ID is offline,
it looks up the node distance table and returns the nearest
online node.

ACPI device drivers, which are called after the NUMA initialization
has completed in the kernel, can call this interface to obtain their
device NUMA topology from ACPI tables.  Such drivers do not have to
deal with offline nodes.  A node may be offline when a device
proximity ID is unique, SRAT memory entry does not exist, or NUMA is
disabled, ex. "numa=off" on x86.

This patch also moves the pxm range check from acpi_get_node() to
acpi_map_pxm_to_node().

Signed-off-by: Toshi Kani 
Acked-by: Rafael J. Wysocki >
Signed-off-by: Dan Williams

ACPI / table: remove duplicate NULL check for the handler of acpi_table_parse()

2015-02-06T00:34:47+00:00

In acpi_table_parse(), pointer of the table to pass to handler() is
checked before handler() called, so remove all the duplicate NULL
check in the handler function.

CC: Tony Luck 
CC: Thomas Gleixner 
Signed-off-by: Hanjun Guo 
Signed-off-by: Rafael J. Wysocki

ACPI / numa: Use __weak, not the gcc-specific version

2014-02-03T17:39:43+00:00

Use "__weak" instead of the gcc-specific "__attribute__ ((weak))".

Signed-off-by: Bjorn Helgaas 
Acked-by: Rafael J. Wysocki

ACPI / numa: Make __acpi_map_pxm_to_node(), acpi_get_pxm() static

2014-02-03T17:39:38+00:00

__acpi_map_pxm_to_node() and acpi_get_pxm() are only used within
drivers/acpi/numa.c.  This makes them static and removes their
declarations.

Signed-off-by: Bjorn Helgaas 
Acked-by: Rafael J. Wysocki

ACPI / numa: Simplify acpi_get_node() style

2014-02-03T17:39:32+00:00

Simplify control flow by removing local variable initialization and
returning a constant as soon as possible.  No functional change.

Signed-off-by: Bjorn Helgaas 
Acked-by: Rafael J. Wysocki

ACPI / numa: Fix acpi_get_node() prototype

2014-02-03T17:39:27+00:00

acpi_get_node() takes an acpi_handle, not an "acpi_handle *".  This
fixes the prototype and the definitions.

Signed-off-by: Bjorn Helgaas 
Acked-by: Rafael J. Wysocki

ACPI: Clean up inclusions of ACPI header files

2013-12-07T00:03:14+00:00

Replace direct inclusions of ,  and
, which are incorrect, with 
inclusions and remove some inclusions of those files that aren't
necessary.

First of all, ,  and 
should not be included directly from any files that are built for
CONFIG_ACPI unset, because that generally leads to build warnings about
undefined symbols in !CONFIG_ACPI builds.  For CONFIG_ACPI set,
 includes those files and for CONFIG_ACPI unset it
provides stub ACPI symbols to be used in that case.

Second, there are ordering dependencies between those files that always
have to be met.  Namely, it is required that  be included
prior to  so that the acpi_pci_root declarations the
latter depends on are always there.  And  which provides
basic ACPICA type declarations should always be included prior to any other
ACPI headers in CONFIG_ACPI builds.  That also is taken care of including
 as appropriate.

Signed-off-by: Lv Zheng 
Cc: Greg Kroah-Hartman 
Cc: Matthew Garrett 
Cc: Tony Luck 
Cc: "H. Peter Anvin" 
Acked-by: Bjorn Helgaas  (drivers/pci stuff)
Acked-by: Konrad Rzeszutek Wilk  (Xen stuff)
Signed-off-by: Rafael J. Wysocki

ACPI / mm: use NUMA_NO_NODE

2013-09-23T23:40:38+00:00

Use more appropriate NUMA_NO_NODE instead of -1

Signed-off-by: Jianguo Wu 
Acked-by: David Rientjes 
Signed-off-by: Rafael J. Wysocki