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ppc/pnv: SMT support for powernv

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Set the TIR default value with the SMT thread index, and place some
standard limits on SMT configurations. Now powernv is able to boot
skiboot and Linux with a SMT topology, including booting a KVM guest.

There are several SPRs and other features (e.g., broadcast msgsnd)
that are not implemented, but not used by OPAL or Linux and can be
added incrementally.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <20230705120631.27670-4-npiggin@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Nicholas Piggin 2023-07-05 22:06:30 +10:00 • committed by Daniel Henrique Barboza
parent 9cdfd1b9f7
commit 934676c7b7
3 changed files with 17 additions and 13 deletions
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5
docs/system/ppc/powernv.rst
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@ -195,11 +195,6 @@ Use a MTD drive to add a PNOR to the machine, and get a NVRAM :
-drive file=./witherspoon.pnor,format=raw,if=mtd
CAVEATS
-------
* No support for multiple HW threads (SMT=1). Same as pseries.
Maintainer contact information
------------------------------