Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2a0ffbd4 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
Browse files

powerpc/pseries/scm: Mark the region volatile if cache flush not required 



The device tree node is documented as below:

  “ibm,cache-flush-required”:
  property name indicates Cache Flush Required for this Persistent Memory Segment to persist memory
  prop-encoded-array: None, this is a name only property.

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent c0b1b23b

arch/powerpc/platforms/pseries/papr_scm.c

+7 −1
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ struct papr_scm_priv { 
	uint64_t blocks;

	uint64_t block_size;

	int metadata_size;

	bool is_volatile;



	uint64_t bound_addr;
@@ -248,6 +249,9 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p) 
	ndr_desc.nd_set = &p->nd_set;

	set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);



	if (p->is_volatile)

		p->region = nvdimm_volatile_region_create(p->bus, &ndr_desc);

	else

		p->region = nvdimm_pmem_region_create(p->bus, &ndr_desc);

	if (!p->region) {

		dev_err(dev, "Error registering region %pR from %pOF\n",
@@ -293,6 +297,7 @@ static int papr_scm_probe(struct platform_device *pdev) 
		return -ENODEV;

	}





	p = kzalloc(sizeof(*p), GFP_KERNEL);

	if (!p)

		return -ENOMEM;
@@ -304,6 +309,7 @@ static int papr_scm_probe(struct platform_device *pdev) 
	p->drc_index = drc_index;

	p->block_size = block_size;

	p->blocks = blocks;

	p->is_volatile = !of_property_read_bool(dn, "ibm,cache-flush-required");



	/* We just need to ensure that set cookies are unique across */

	uuid_parse(uuid_str, (uuid_t *) uuid);