powerpc/pseries: Account for SPURR ticks on idle CPUs

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On Pseries LPARs, to calculate utilization, we need to know the
[S]PURR ticks when the CPUs were busy or idle.

Via pseries_idle_prolog(), pseries_idle_epilog(), we track the idle
PURR ticks in the VPA variable "wait_state_cycles". This patch extends
the support to account for the idle SPURR ticks.

Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1586249263-14048-4-git-send-email-ego@linux.vnet.ibm.com

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Gautham R. Shenoy 2020-04-07 14:17:41 +05:30 • committed by Michael Ellerman

parent c4019198cf

commit dc8afce5f4

2 changed files with 19 additions and 0 deletions

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17

arch/powerpc/include/asm/idle.h

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2

arch/powerpc/platforms/pseries/setup.c

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