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Re: [Qemu-devel] [PATCH] Enable NVMe start controller for Windows guest.


From: Keith Busch
Subject: Re: [Qemu-devel] [PATCH] Enable NVMe start controller for Windows guest.
Date: Fri, 24 Apr 2015 19:19:06 +0000 (UTC)
User-agent: Alpine 2.00 (LNX 1167 2008-08-23)

On Fri, 24 Apr 2015, Daniel Stekloff wrote:
Windows seems to send two separate calls to NVMe controller configuration. The
first sends configuration info and the second the enable bit. I couldn't
enable the Windows 8.1 in-box NVMe driver with base Qemu. I made the
following change to store the configuration data and then handle enable and
NVMe driver works on Windows 8.1.

Hm, Microsoft's driver must be issuing MMIO reads to mask in the enable
bit rather than keep the state known. Sounds odd, but thanks for the fix.

Acked-by: Keith Busch <address@hidden>



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