Page MenuHomeFreeBSD

enabling Hyper-V SMP for ARM64

Authored by on May 26 2023, 9:17 AM.
Referenced Files
F68044688: D40279.diff
Thu, Sep 21, 11:08 PM
F68030457: D40279.id122558.diff
Thu, Sep 21, 4:41 PM
Unknown Object (File)
Thu, Sep 14, 7:36 AM
Unknown Object (File)
Wed, Sep 6, 5:44 AM
Unknown Object (File)
Tue, Sep 5, 2:12 AM
Unknown Object (File)
Sun, Sep 3, 10:37 PM
Unknown Object (File)
Aug 14 2023, 9:02 PM
Unknown Object (File)
Jul 27 2023, 2:44 PM



vmbus_synic_setup(), is invoked via vmbus_intrhook -> vmbus_doattach -> smp_rendezvous. On !EARLY_AP_STARTUP (e.g., aarch64), SMP isn't functional in intrhooks and smp_rendezvous() will just call vmbus_synic_setup() on the boot AP. There's nothing that will initialize the pcpu data on every other AP.
To fix it we need to use SI_SUB_SMP for vmbus_doattach().

Diff Detail

Lint Skipped
Tests Skipped

Event Timeline


This code should just go away entirely, there is no !EARLY_AP_STARTUP platform where it will ever call vmbus_doattach here.


There's a reference to cold down here in the sysinit that should also go away, we should just always call vmbus_doattach() if we're doing the sysinit -- it *has* to be positioned at a point where "thread scheduling is possible". marked an inline comment as done. marked an inline comment as done.
This revision is now accepted and ready to land.Jun 6 2023, 7:54 AM
This revision was automatically updated to reflect the committed changes.