5.15 kernel patches

Ampere kernel patches based on 5.15.25 Longterm kernel.

Not upstream yet

hwmon

1. hwmon: Add Ampere Altra HW monitor driver
2. hwmon: (altra) restrict energy measurements to root access
3. hwmon: (xgene) restrict power measurements to root access
4. fixup! hwmon: (xgene) restrict power measurements to root access

Note: patch 4 fixes up patch 3. So 3 and 4 can be merged

Led

1. led: Add Altra LED driver

RAS

1. ACPI/AEST: Initial AEST driver
2. trace, ras: add ARM RAS extension trace event
3. NOUPSTREAM: arm64/ras: Treat single-bit ECC error in the MMU TC RAM a… …s fatal

SMMU PMU

1. perf/smmuv3: Allow sharing MMIO registers with the SMMU driver

Note: Still required for 5.15? Need verify. See: https://github.com/AmpereComputing/ampere-lts-kernel/issues/77#issuecomment-913712111

DSU PMU

1. perf: arm_dsu: Allow IRQ to be shared among devices

Note: Still required for 5.15?, see: https://github.com/AmpereComputing/ampere-lts-kernel/issues/75

For testing only - Will not upstream

Altra CPUECTLR_EL1 config driver

1. NOUPSTREAM: firmware: Support Ampere Altra CPUECTLR_EL1 config driver
2. NOUPSTREAM: altra_cpuectlr: Only config the prefetcher bits
3. altra_cpuectlr: fix re-insmod errors

Note: patch 2 and 3 fixes up patch 1, so these 3 patches can be merged

NUMA optimazation

1. mm/readahead: Alloc the readahead cache pages from the numa node of t… …he block device
2. scsi: Assign node id according to the controller's numa node

Note: patch 2 depends on patch 1