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AmpereComputing / ampere-lts-kernel---DEPRECATED

Linux 5.4 and 5.10 Longterm kernel (LTS) with Ampere patches
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refactor patch: perf: arm_dsu: Allow IRQ to be shared among devices #154

Open adamliyi opened 2 years ago

adamliyi commented 2 years ago

Original patch: https://github.com/AmpereComputing/ampere-centos-kernel/commit/19a1b3868b040d9c444719eccc6ede39e5bd0857

This patch was ported to 5.4 and 5.10 kernel.

In latest ampere-centos-8.0 kernel, in commit: git lab centos-8.0 kernel commit bd56208e48dfd73407eb6e93fecbe023323581b5

image

This patch has been dropped. We need to refactoring 5.10 and 5.4 kernel.

adamliyi commented 2 years ago

Since FW 1.04.20210129, each dsu is assigned different irq:

# cat /proc/interrupts |  grep -i dsu
169:               GICv3  64 Level     arm_dsu_0
170:               GICv3  65 Level     arm_dsu_1
... ...

So IRQF_SHARED is not necessary.