arm_pmu: ACPI support
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Cover letter [PATCH 00/14] arm_pmu: ACPI support
Hi,
Quoted 7 lines · Jeremy Linton
Quoted 1 line · Mark Rutland
This series implements ACPI support in the ARM PMU code.
I tried these patches on a m400 (which uses PPIs), and the kernel fails to come up enough to login via the network (which works with 4.11rc1 without these patches). So, I suspect there is something wrong with them.
Indeed; sorry about this. I'll see if I can get access to a board to try local debugging.
I assume that these have successfully booted with the other ACPI PMU patches?
Quoted 3 lines
Given that SPCR/etc is also broken and the kernel itself seems to fail if I give it a full earlycon line, I can't pin down whats going on with the PMU code until I fix the console.
If there are known broken tables, it's possible that the MADT GICC is also broken, and we're registering/unregistering an erroneously described interrupt.
Quoted 5 lines
About the only thing it says with any meaning when earlycon is passed is:
[ 10.965147] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled [ 11.064193] dw-apb-uart APMC0D08:00: cannot get irqand promptly hangs up.
I guess that's at the point it transfers over to the real console driver. If you're not already doing so, also passing "keep_bootcon" may get more output.
Quoted 2 lines
I'm OOO for the next week, and will debug this further when I return if no one else makes any progress.
I'll see what I can do until then.
Thanks,
Mark.