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| author | Dan Williams <dan.j.williams@intel.com> | 2016-03-03 09:38:00 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-03-05 12:25:45 -0800 |
| commit | cfe30b872058f211630eda7f65fb19d83beaaa3c (patch) | |
| tree | 44dd4131a1dd92ef45babff885cb6add604746a9 /drivers/nvdimm/pfn.h | |
| parent | d9cbe09d39aa13f6924dc5fb88325de7ef01a72e (diff) | |
| download | lwn-cfe30b872058f211630eda7f65fb19d83beaaa3c.tar.gz lwn-cfe30b872058f211630eda7f65fb19d83beaaa3c.zip | |
libnvdimm, pmem: adjust for section collisions with 'System RAM'
On a platform where 'Persistent Memory' and 'System RAM' are mixed
within a given sparsemem section, trim the namespace and notify about the
sub-optimal alignment.
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/pfn.h')
| -rw-r--r-- | drivers/nvdimm/pfn.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h index 6ee707e5b279..8e343a3ca873 100644 --- a/drivers/nvdimm/pfn.h +++ b/drivers/nvdimm/pfn.h @@ -27,10 +27,13 @@ struct nd_pfn_sb { __le32 flags; __le16 version_major; __le16 version_minor; - __le64 dataoff; + __le64 dataoff; /* relative to namespace_base + start_pad */ __le64 npfns; __le32 mode; - u8 padding[4012]; + /* minor-version-1 additions for section alignment */ + __le32 start_pad; + __le32 end_trunc; + u8 padding[4004]; __le64 checksum; }; @@ -45,4 +48,7 @@ struct nd_pfn_sb { #define PFN_SECTION_ALIGN_DOWN(x) (x) #define PFN_SECTION_ALIGN_UP(x) (x) #endif + +#define PHYS_SECTION_ALIGN_DOWN(x) PFN_PHYS(PFN_SECTION_ALIGN_DOWN(PHYS_PFN(x))) +#define PHYS_SECTION_ALIGN_UP(x) PFN_PHYS(PFN_SECTION_ALIGN_UP(PHYS_PFN(x))) #endif /* __NVDIMM_PFN_H */ |