Re: [PATCH for-next 03/10] IB/core: Support accessing SA in virtualized environment

On Tue, Mar 01, 2016 at 12:31:53PM -0700, Jason Gunthorpe wrote:

I mean opensm supports the GUID Alias scheme for virtualization, this
new virtualization scheme is not compatible, and we shouldn't have the
kernel drop support for existing working SMs, by, eg, replacing the
mlx4 guid alias scheme with this new scheme.

I'm guessing a user controlled switch is going to be necessary here to
pick GUID alias or port port virtualization.

The alias GUID mechanism remains and can be used with mlx4 devices.
With this scheme the admin configures the port and node GUIDs using
iprout2 which ends up in the hardware driver configuring the deivce. A
virtualization aware SM can read this configuration through MADs.
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