The recently released UEFI 2.7 Specification [1], includes an updated
version (v1.2) of the NVDIMM Namespace Label Specification that was previously
published on pmem.io [2] (v1.1).
In the process of moving to a UEFI standard definition the v1.2 updates
adds several features for improved cross-OS and pre-OS (EFI driver)
compatibility and safety. The major highlights include:
1/ Support for an "address abstraction guid" so that implementations can
uniquely identify personalities layered on top of a namespace. A
standard address abstraction definition example is the BTT (Block
Translation Table for sector atomicity) layout. A private / local
abstraction definition example is the Linux device-DAX personality.
2/ Checksums for individual label slots
3/ Additional safety and self-consistency properties like an updated
interleave-set-cookie algorithm and recording the NFIT address-type-guid
in the namespace.
UEFI mandates that these labels be accessed through new ACPI methods
_LSI, _LSR, and _LSW (Label Storage {Info,Read,Write}), however support
for those is saved for a later patch series once the ACPICA enabling for
ACPI 6.2 lands in an immutable form in the acpi tree.
These updates pass a run through the nvdimm unit tests and an updated
version of the tests targeting the address-abstraction guid. This set is
based on the 'uuid-types' branch of git.infradead.org/users/hch/uuid.git
which includes Christoph's and Andy's revamp of the kernel's uuid + guid
helper routines.
[1]: http://www.uefi.org/sites/default/files/resources/UEFI_Spec_2_7.pdf
[2]: http://pmem.io/documents/NVDIMM_Namespace_Spec.pdf
---
Dan Williams (9):
libnvdimm, label: add v1.2 nvdimm label definitions
libnvdimm, label: add v1.2 interleave-set-cookie algorithm
libnvdimm, label: honor the lba size specified in v1.2 labels
libnvdimm, label: populate the type_guid property for v1.2 namespaces
libnvdimm, label: populate 'isetcookie' for blk-aperture namespaces
libnvdimm, label: update 'nlabel' and 'position' handling for local namespaces
libnvdimm, label: add v1.2 label checksum support
libnvdimm, label: add address abstraction identifiers
libnvdimm, label: switch to using v1.2 labels by default
drivers/acpi/nfit/core.c | 67 +++++++++--
drivers/nvdimm/btt_devs.c | 8 +
drivers/nvdimm/claim.c | 28 ++++
drivers/nvdimm/core.c | 3
drivers/nvdimm/dax_devs.c | 8 +
drivers/nvdimm/label.c | 244 +++++++++++++++++++++++++++++++++++----
drivers/nvdimm/label.h | 20 +++
drivers/nvdimm/namespace_devs.c | 211 +++++++++++++++++++++++++++++-----
drivers/nvdimm/nd.h | 13 ++
drivers/nvdimm/pfn_devs.c | 8 +
drivers/nvdimm/pmem.c | 1
drivers/nvdimm/region_devs.c | 43 ++++++-
include/linux/libnvdimm.h | 8 +
include/linux/nd.h | 12 ++
14 files changed, 596 insertions(+), 78 deletions(-)
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