irqchip/gic-v3-its: Track LPI distribution on a per CPU basis

stable inclusion
from stable-v5.8-rc1
commit 2f13ff1d
category: perf
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6UVFG
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=2f13ff1d1d5c0257c97ea76b86a2d9c99c44a4b9



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In order to improve the distribution of LPIs among CPUs, let start by
tracking the number of LPIs assigned to CPUs, both for managed and
non-managed interrupts (as separate counters).

Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/20200515165752.121296-2-maz@kernel.org


Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>