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[v3,2/4] acpi: nfit: add persistent memory control flag for nd_region

Message ID 151735687890.34477.10539808986417857457.stgit@djiang5-desk3.ch.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dave Jiang Jan. 31, 2018, 12:01 a.m. UTC 
Propagate the ADR attribute flag from the NFIT platform capabilities
sub-table to nd_region.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 drivers/acpi/nfit/core.c  |    3 +++
 include/linux/libnvdimm.h |    6 ++++++
 2 files changed, 9 insertions(+)
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Patch

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index bcf52bb93b65..b1616120ca57 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2668,6 +2668,9 @@  static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
 	if(acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_CACHE_FLUSH)
 		set_bit(ND_REGION_PERSIST_CACHE, &ndr_desc->flags);
 
+	if (acpi_desc->platform_cap & ACPI_NFIT_CAPABILITY_MEM_FLUSH)
+		set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc->flags);
+
 	list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) {
 		struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
 		struct nd_mapping_desc *mapping;
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index f2fc0da4da04..ff855ed965fb 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -52,6 +52,12 @@  enum {
 	 * system power loss.
 	 */
 	ND_REGION_PERSIST_CACHE = 1,
+	/*
+	 * Platform provides mechanisms to automatically flush outstanding
+	 * write data from memory controler to pmem on system power loss.
+	 * (ADR)
+	 */
+	ND_REGION_PERSIST_MEMCTRL = 2,
 
 	/* mark newly adjusted resources as requiring a label update */
 	DPA_RESOURCE_ADJUSTED = 1 << 0,