Le lun. 18 déc. 2023, 17:44, Jan Beulich <jbeul...@suse.com> a écrit :
> On 18.12.2023 17:21, Sébastien Chaumat wrote:
> >>>>> On 05.12.2023 21:31, Sébastien Chaumat wrote:
> >>> This issue seems that IRQ 7 (the GPIO controller) is natively fasteoi
> >>> (so level type) while in xen it is mapped to oapic-edge instead of
> >>> oapic-level
> >>> as the SSDT indicates :
> >>>
> >>> Device (GPIO)
> >>>
> >>> {
> >>> Name (_HID, "AMDI0030") // _HID: Hardware ID
> >>> Name (_CID, "AMDI0030") // _CID: Compatible ID
> >>> Name (_UID, Zero) // _UID: Unique ID
> >>> Method (_CRS, 0, NotSerialized) // _CRS: Current Resource
> Settings
> >>> {
> >>> Name (RBUF, ResourceTemplate ()
> >>> {
> >>> Interrupt (ResourceConsumer, Level, ActiveLow,
> Shared, ,, )
> >>> {
> >>> 0x00000007,
> >>> }
> >>> Any idea why ?
> >>
> >> Information coming from AML is required to be handed down by Dom0 to
> Xen.
> >> May want checking that (a) Dom0 properly does so and (b) Xen doesn't
> screw
> >> up in consuming that data. See PHYSDEVOP_setup_gsi. I wonder if this is
> >> specific to it being IRQ7 which GPIO uses, as at the (master) PIC IRQ7
> is
> >> also the spurious vector. You may want to retry with the tip of the 4.17
> >> branch (soon to become 4.17.3) - while it doesn't look very likely to me
> >> that recent backports there were related, it may still be that they make
> >> a difference.
> >>
> >
> > testing with 4.17.3:
> >
> > Adding some printk in PHYSDEVOP_setup_gsi, I see (in xl dmesg) that
> > (XEN) PHYSDEVOP_setup_gsi setup_gsi : gsi: 7 triggering: 1 polarity: 1
> >
> > but later on in dmesg I see :
> > [ 1.747958] xen: registering gsi 7 triggering 0 polarity 1
> >
> > So triggering is flipped from 1 to 0 (cannot find the definition for
> > those values).
> > Could this be the culprit ?
>
> Possibly. Since it would be the kernel to invoke PHYSDEVOP_setup_gsi, it
> looks as if the kernel was confused about which trigger mode to use. Have
> you figured from where the kernel takes the two different values?
>
> Would you mind pointing me to the definition for those values first ? I
did not find what 0/1 means in this context.
Thanks
