GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

acpi: nfit: Add support for detect platform CPU cache flush on power loss

Browse source 
In ACPI 6.2a the platform capability structure has been added to the NFIT
tables. That provides software the ability to determine whether a system
supports the auto flushing of CPU caches on power loss. If the capability
is supported, we do not need to do dax_flush(). Plumbing the path to set the
property on per region from the NFIT tables.

This patch depends on the ACPI NFIT 6.2a platform capabilities support code
in include/acpi/actbl1.h.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
This commit is contained in:
Dave Jiang 2018-01-31 12:45:38 -07:00 • committed by Ross Zwisler
parent a7f2766ac7
commit 06e8ccdab1
4 changed files with 29 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
include/linux/libnvdimm.h
View file

@ -47,6 +47,11 @@ enum {
/* region flag indicating to direct-map persistent memory by default */
ND_REGION_PAGEMAP = 0,
/*
* Platform ensures entire CPU store data path is flushed to pmem on
* system power loss.
*/
ND_REGION_PERSIST_CACHE = 1,
/* mark newly adjusted resources as requiring a label update */
DPA_RESOURCE_ADJUSTED = 1 << 0,