On Mon, May 02, 2022 at 09:36:27AM -0700, Michael Kelley wrote: > Linux code for running as a Hyper-V guest includes special cases for the > first released versions of Hyper-V: 2008 and 2008R2/Windows 7. These > versions were very thinly used for running Linux guests when first > released more than 12 years ago, and they are now out of support > (except for extended security updates). As initial versions, they > lack the performance features needed for effective production usage > of Linux guests. In total, there's no need to continue to support > the latest Linux kernels on these versions of Hyper-V. > > Simplify the code for running on Hyper-V by removing the special > cases. This includes removing the negotiation of the VMbus protocol > versions for 2008 and 2008R2, and the special case code based on > those VMbus protocol versions. Changes are in the core VMbus code and > several drivers for synthetic VMbus devices. > > Some drivers have driver-specific protocols with the Hyper-V host and > may have versions of those protocols that are limited to 2008 and > 2008R2. This patch set does the clean-up only for the top-level > VMbus protocol versions, and not the driver-specific protocols. > Cleaning up the driver-specific protocols can be done with > follow-on patches. > > There's no specific urgency to removing the special case code for > 2008 and 2008R2, so if the broader Linux kernel community surfaces > a reason why this clean-up should not be done now, we can wait. > But I think we want to eventually stop carrying around this extra > baggage, and based on discussions with the Hyper-V team within > Microsoft, we're already past the point that it has any value. > > Michael Kelley (4): > Drivers: hv: vmbus: Remove support for Hyper-V 2008 and Hyper-V > 2008R2/Win7 > scsi: storvsc: Remove support for Hyper-V 2008 and 2008R2/Win7 > video: hyperv_fb: Remove support for Hyper-V 2008 and 2008R2/Win7 > drm/hyperv: Remove support for Hyper-V 2008 and 2008R2/Win7 Applied to hyperv-next.
