powerpc/pseries: Enable hvpipe with ibm,set-system-parameter RTAS

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The partition uses “Hypervisor Pipe OS Enablement Notification”
system parameter token (value = 64) to enable / disable hvpipe in
the hypervisor. Once hvpipe is enabled, the hypervisor notifies
OS if the payload is pending for that partition from any source.
This system parameter token takes 1 byte length of data with
1 = Enable and 0 = Disable.

Enable hvpipe in the hypervisor with ibm,set-system-parameter
RTAS after registering hvpipe event source interrupt.

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
Tested-by: Shashank MS <shashank.gowda@in.ibm.com>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250909084402.1488456-9-haren@linux.ibm.com

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Haren Myneni 2025-09-09 01:44:00 -07:00 • committed by Madhavan Srinivasan

parent b48b6cc8c6

commit 39a08a4f94

2 changed files with 33 additions and 2 deletions

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1

arch/powerpc/include/asm/papr-sysparm.h

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34

arch/powerpc/platforms/pseries/papr-hvpipe.c

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