On Tue, 09 Sep 2025 01:43:52 -0700, Haren Myneni wrote:
> On powerPC systems, the Hardware Management Console (HMC) is used
> to create and manage logical partitions (LPAR) and both HMC and
> LPARs exchange information over Ethernet which can expose security
> implications. Hence the current method of communication is not
> viable for secure boot configuration. To overcome these concerns,
> the hypervisor introduced new inband hypervisor channel called
> “Hypervisor Pipe (HVPIPE)” which allows HMC and LPARs to exchange
> information with ibm,send-hvpipe-msg and ibm,receive-hvpipe-msg
> RTAS calls. Sources can be any target that the hypervisor supports,
> but only HMC source is supported.
>
> [...]
Applied to powerpc/next.
[1/9] powerpc/pseries: Define papr-hvpipe ioctl
https://git.kernel.org/powerpc/c/043439ad1a23cd3f65628310d1f5a06e61f8b431
[2/9] powerpc/pseries: Define HVPIPE specific macros
https://git.kernel.org/powerpc/c/26b4fcecea05b8927b17c9ace132914ffcb4d97e
[3/9] powerpc/pseries: Add papr-hvpipe char driver for HVPIPE interfaces
https://git.kernel.org/powerpc/c/814ef095f12c9fa142043ee689500f3a41bb6dab
[4/9] powerpc/pseries: Send payload with ibm,send-hvpipe-msg RTAS
https://git.kernel.org/powerpc/c/56dbc6678bbb9c011bea91c4a0774a9464ab99a7
[5/9] powerpc/pseries: Receive payload with ibm,receive-hvpipe-msg RTAS
https://git.kernel.org/powerpc/c/cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86
[6/9] powerpc/pseries: Wakeup hvpipe FD when the payload is pending
https://git.kernel.org/powerpc/c/da24fb99a1b5cc842b9446f67f6bcda36b49817f
[7/9] powerpc/pseries: Enable HVPIPE event message interrupt
https://git.kernel.org/powerpc/c/b48b6cc8c655d8cdcf5124ba9901b74c8f759668
[8/9] powerpc/pseries: Enable hvpipe with ibm,set-system-parameter RTAS
https://git.kernel.org/powerpc/c/39a08a4f94980518ef2eca3c6c6b61094c99f1af
[9/9] powerpc/pseries: HVPIPE changes to support migration
https://git.kernel.org/powerpc/c/6d84f85151bbd062d36bda6daf37a73945b471c9
Thanks
