Messages in this thread | | | Subject | Re: [PATCH] xen/pv: Add PV specific legacy_pic struct to expose legacy IRQs. | From | Boris Ostrovsky <> | Date | Tue, 19 Mar 2019 19:06:49 -0400 |
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On 3/19/19 4:02 PM, Jennifer Herbert wrote: > The ACPI tables doesn't always contain all IRQs for legacy devices > such as RTC. Since no PIC controller is visible for a PV linux guest, > under Xen, legacy_pic currently defaults to the null_legacy_pic - with > reports no legacy IRQs. Since the commit "rtc: cmos: Do not assume > irq 8 for rtc when there are no legacy irqs" by Hans de Goede > (commit id: a1e23a42f1bdc00e32fc4869caef12e4e6272f26), the rtc now > incorrectly decides it has no irq it can use, for some hardware. > > This patch rectifies the problem by providing a xen legacy_pic > struct, which is much like the null_legacy_pic except that it > reports NR_IRQS_LEGACY irqs.
I assume this is for dom0?
Could there be the same problem with PVH dom0? (and if yes then this should probably go into arch/x86/xen/enlighten.c).
-boris
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