[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [RFC XEN PATCH v8 5/5] domctl: Add XEN_DOMCTL_gsi_permission to grant gsi
On 04.06.2024 08:33, Chen, Jiqian wrote: > 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: >>>>>>> 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. IOW really your answer is "yes" ... >>> In my environment, gsi of my dGPU is 24. >> >> ... on one specific system? ... to this question I raised. Whatever you dump on any number of systems, there's always the chance that there's another system where things are different. >> 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. Hence why I tried to point out that going from observations on a particular system isn't enough. Jan
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