commit ebd1568fc73209bbc1339a449f3df0b6c9a12358
author Alan Adamson <alan.adamson@oracle.com> Thu Sep 26 14:24:58 2024 -0700
committer Klaus Jensen <k.jensen@samsung.com> Tue Oct 01 09:02:05 2024 +0200
tree 3ead7c860f7947063b3bb809af94da03f487e93c
parent e4bcb5865c46289e9320936e910056dc37e9d678

hw/nvme: add atomic write support

Adds support for the controller atomic parameters: AWUN and AWUPF. Atomic
Compare and Write Unit (ACWU) is not currently supported.

Writes that adhere to the ACWU and AWUPF parameters are guaranteed to be atomic.

New NVMe QEMU Parameters (See NVMe Specification for details):
       atomic.dn (default off) - Set the value of Disable Normal.
       atomic.awun=UINT16 (default: 0)
       atomic.awupf=UINT16 (default: 0)

By default (Disable Normal set to zero), the maximum atomic write size is
set to the AWUN value.  If Disable Normal is set, the maximum atomic write
size is set to AWUPF.

Signed-off-by: Alan Adamson <alan.adamson@oracle.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>