On 04/11/2016 10:08 PM, Stefano Stabellini wrote:
Hi all,
Unfortunately this patch (now commit
8c058b0b9c34d8c8d7912880956543769323e2d8) causes a regression on Xen
when running on top of QEMU: the number of PIT irqs get set to 0 by
probe_8259A but actually there are 16.
Any suggestions on how to fix this?
1) we could revert 8c058b0b9c34d8c8d7912880956543769323e2d8
2) we could introduce an 'if (!xen_domain())' in probe_8259A
3) suggestions welcome
Stefano, do you have b4ff8389ed14b849354b59ce9b360bdefcdbf99c ?
It was supposed to fix this problem for Xen. However, I just noticed
that arch/arm64/include/asm/irq.h makes nr_legacy_irqs() return 0
(unlike arch/arm/include/asm/irq.h). Could that be the problem?
-boris
