acpi: nfit: add persistent memory control flag for nd_region

Propagate the ADR attribute flag from the NFIT platform capabilities sub-table to nd_region. Signed-off-by: Dave Jiang <[email protected]> Reviewed-by: Ross Zwisler <[email protected]> Signed-off-by: Ross Zwisler <[email protected]>
akeromi · Feb 1, 2018 · 30e6d7b · 30e6d7b
1 parent 06e8ccd
commit 30e6d7b
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diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
@@ -2675,6 +2675,9 @@ 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
@@ -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,