On Mon, 28 Feb 2022 17:09:57 -0800, Haren Myneni wrote:
> PowerPC provides HW compression with NX coprocessor. This feature
> is available on both PowerNV and PowerVM and included in Linux.
> Since each powerpc chip has one NX coprocessor, the VAS introduces
> the concept of windows / credits to manage access to this hardware
> resource. On powerVM, these limited resources should be available
> across all LPARs. So the hypervisor assigns the specific credits
> to each LPAR based on processor entitlement so that one LPAR does
> not overload NX. The hypervisor can reject the window open request
> to a partition if exceeds its credit limit (1 credit per window).
>
> [...]
Applied to powerpc/next.
[1/9] powerpc/pseries/vas: Use common names in VAS capability structure
https://git.kernel.org/powerpc/c/40562fe4fa3d94c7462ec909ab89b075e26c59ac
[2/9] powerpc/pseries/vas: Save PID in pseries_vas_window struct
https://git.kernel.org/powerpc/c/976410cd2cb4c6ed53bd12c192fc46bbcc0fbce7
[3/9] powerpc/vas: Add paste address mmap fault handler
https://git.kernel.org/powerpc/c/1fe3a33ba0a37e7aa0df0acbe31d5dda7610c16e
[4/9] powerpc/vas: Return paste instruction failure if no active window
https://git.kernel.org/powerpc/c/b5c63d90cc2de8ac6724fec84d1d72cfebcae41d
[5/9] powerpc/vas: Map paste address only if window is active
https://git.kernel.org/powerpc/c/6a8d4ca891aa5f9402973eab5d7d9cf3929678b7
[6/9] powerpc/pseries/vas: Close windows with DLPAR core removal
https://git.kernel.org/powerpc/c/8ef7b9e1765a52c8023d9133a2438ac9f6da486a
[7/9] powerpc/pseries/vas: Reopen windows with DLPAR core add
https://git.kernel.org/powerpc/c/c656cfe571a9b8b882e31177f554bd79141fc015
[8/9] powerpc/pseries/vas: sysfs interface to export capabilities
https://git.kernel.org/powerpc/c/b903737bc522e0ef3f45a2a60c364ff547572c9b
[9/9] powerpc/pseries/vas: Add 'update_total_credits' entry for QoS capabilities
https://git.kernel.org/powerpc/c/45f06eac30e5abebecc66e41e7c89d5b4413bac1
cheers
