On 2024/6/4 14:12, Jan Beulich wrote: > On 04.06.2024 08:01, Chen, Jiqian wrote: >> On 2024/6/4 13:55, Jan Beulich wrote: >>> On 04.06.2024 05:04, Chen, Jiqian wrote: >>>> On 2024/5/30 23:51, Jan Beulich wrote: >>>>> On 30.05.2024 13:19, Chen, Jiqian wrote: >>>>>> I dump all mpc_config_intsrc of array mp_irqs, it shows: >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 0 >>>>>> dstapic 33 dstirq 2 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 15 srcbus 0 srcbusirq 9 >>>>>> dstapic 33 dstirq 9 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 1 >>>>>> dstapic 33 dstirq 1 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 3 >>>>>> dstapic 33 dstirq 3 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 4 >>>>>> dstapic 33 dstirq 4 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 5 >>>>>> dstapic 33 dstirq 5 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 6 >>>>>> dstapic 33 dstirq 6 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 7 >>>>>> dstapic 33 dstirq 7 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 8 >>>>>> dstapic 33 dstirq 8 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 10 >>>>>> dstapic 33 dstirq 10 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 11 >>>>>> dstapic 33 dstirq 11 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 12 >>>>>> dstapic 33 dstirq 12 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 13 >>>>>> dstapic 33 dstirq 13 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 14 >>>>>> dstapic 33 dstirq 14 >>>>>> (XEN) find_irq_entry type 3 irqtype 0 irqflag 0 srcbus 0 srcbusirq 15 >>>>>> dstapic 33 dstirq 15 >>>>>> >>>>>> It seems only Legacy irq and gsi[0:15] has a mapping in mp_irqs. >>>>>> Other gsi can be considered 1:1 mapping with irq? Or are there other >>>>>> places reflect the mapping between irq and gsi? >>>>> >>>>> It may be uncommon to have overrides for higher GSIs, but I don't think >>>>> ACPI >>>>> disallows that. >>>> Do you suggest me to add overrides for higher GSIs into array mp_irqs? >>> >>> Why "add"? That's what mp_override_legacy_irq() already does, isn't it? >> No. mp_override_legacy_irq only overrides for gsi < 16, but not for gsi >= >> 16(I dump all mappings from array mp_irqs). > > I assume you mean you observe so ... No, after starting xen pvh dom0, I dump all entries from mp_irqs.
> >> In my environment, gsi of my dGPU is 24. > > ... on one specific system? The function is invoked from > acpi_parse_int_src_ovr(), and I can't spot any restriction to > IRQs less than 16 there. I didn't see any restriction too, but from the dump results, there are only 16 entries, see previous email. > > Jan -- Best regards, Jiqian Chen.
