Bug 1427 - irqchip: phytium: Add Phytium 2500 GIC ITS driver
Summary: irqchip: phytium: Add Phytium 2500 GIC ITS driver
Status: CONFIRMED
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: ARM (show other bugs) ARM
Version: unspecified
Hardware: aarch64 Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: Jack_phytium
QA Contact: shuming
URL:
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Keywords:
Depends on:
Blocks:
 
Reported: 2022-06-09 11:42 UTC by Jack_phytium
Modified: 2022-06-09 11:43 UTC (History)
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Description Jack_phytium phytium_group 2022-06-09 11:42:54 UTC
Phytium S2500 GIC suppports that SPI and PPI interrupt only be handled by local socket cpus. For example ,if a interrupt of hard disk generates on one socket, but the interrupt is assigned to other socket cpus, then OS can't bring up.

So the solution is indroduce a new ITS driver, which initialize Distribute/Redistribute, limit MSI-X/INT interrupts to be assigned to other socket cpus, configue interrupt affinity.