Commit 42237e39 authored by Dan Williams's avatar Dan Williams

libnvdimm: allow a platform to force enable label support

Platforms like QEMU-KVM implement an NFIT table and label DSMs.
However, since that environment does not define an aliased
configuration, the labels are currently ignored and the kernel registers
a single full-sized pmem-namespace per region. Now that the kernel
supports sub-divisions of pmem regions the labels have a purpose.
Arrange for the labels to be honored when we find an existing / valid
namespace index block.

Cc: <qemu-devel@nongnu.org>
Cc: Haozhong Zhang <haozhong.zhang@intel.com>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 8d7c22ac
...@@ -64,6 +64,8 @@ static int nvdimm_probe(struct device *dev) ...@@ -64,6 +64,8 @@ static int nvdimm_probe(struct device *dev)
nd_label_copy(ndd, to_next_namespace_index(ndd), nd_label_copy(ndd, to_next_namespace_index(ndd),
to_current_namespace_index(ndd)); to_current_namespace_index(ndd));
rc = nd_label_reserve_dpa(ndd); rc = nd_label_reserve_dpa(ndd);
if (ndd->ns_current >= 0)
nvdimm_set_aliasing(dev);
nvdimm_bus_unlock(dev); nvdimm_bus_unlock(dev);
if (rc) if (rc)
......
...@@ -184,6 +184,13 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, ...@@ -184,6 +184,13 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
return rc; return rc;
} }
void nvdimm_set_aliasing(struct device *dev)
{
struct nvdimm *nvdimm = to_nvdimm(dev);
nvdimm->flags |= NDD_ALIASING;
}
static void nvdimm_release(struct device *dev) static void nvdimm_release(struct device *dev)
{ {
struct nvdimm *nvdimm = to_nvdimm(dev); struct nvdimm *nvdimm = to_nvdimm(dev);
......
...@@ -238,6 +238,7 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, ...@@ -238,6 +238,7 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
void *buf, size_t len); void *buf, size_t len);
long nvdimm_clear_poison(struct device *dev, phys_addr_t phys, long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
unsigned int len); unsigned int len);
void nvdimm_set_aliasing(struct device *dev);
struct nd_btt *to_nd_btt(struct device *dev); struct nd_btt *to_nd_btt(struct device *dev);
struct nd_gen_sb { struct nd_gen_sb {
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment