powerpc/mobility: wait for memory transfer to complete

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In pseries_migration_partition(), loop until the memory transfer is
complete. This way the calling drmgr process will not exit earlier,
allowing callbacks to be run only once the migration is fully completed.

If reading the VASI state is done after the hypervisor has completed the
migration, the HCALL is returning H_PARAMETER. We can safely assume that
the memory transfer is achieved if this happens.

This will also allow to manage the NMI watchdog state in the next commits.

Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Reviewed-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220713154729.80789-2-ldufour@linux.ibm.com

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Laurent Dufour 2022-07-13 17:47:26 +02:00 • committed by Michael Ellerman

parent 6c9c7d8fbc

commit 882c0d1704

1 changed files with 46 additions and 2 deletions

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arch/powerpc/platforms/pseries/mobility.c

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