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docs: update hw/nvme documentation for protection information

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Add missing entry for pif ("protection information format").
Protection information size can be 8 or 16 bytes, Update the pil entry
as per the NVM command set specification.

Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Ankit Kumar 2023-08-08 02:57:45 +05:30 committed by Klaus Jensen
parent dbdb13f931
commit ec5a138ce6
1 changed files with 9 additions and 3 deletions

12
docs/system/devices/nvme.rst

@ -271,9 +271,15 @@ The virtual namespace device supports DIF- and DIX-based protection information
``pil=UINT8`` (default: ``0``)
Controls the location of the protection information within the metadata. Set
to ``1`` to transfer protection information as the first eight bytes of
metadata. Otherwise, the protection information is transferred as the last
eight bytes.
to ``1`` to transfer protection information as the first bytes of metadata.
Otherwise, the protection information is transferred as the last bytes of
metadata.
``pif=UINT8`` (default: ``0``)
By default, the namespace device uses 16 bit guard protection information
format (``pif=0``). Set to ``2`` to enable 64 bit guard protection
information format. This requires at least 16 bytes of metadata. Note that
``pif=1`` (32 bit guards) is currently not supported.
Virtualization Enhancements and SR-IOV (Experimental Support)
-------------------------------------------------------------