git: kernel - Fix KVM implosion by enabling the IOAPIC
dillon at crater.dragonflybsd.org
Fri Aug 28 18:36:09 PDT 2020
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date: Fri Aug 28 18:32:43 2020 -0700
kernel - Fix KVM implosion by enabling the IOAPIC
* We were disabling the IOAPIC universally when running under a VM,
because older VMs sometimes broke when it was enabled.
However, this can actually implode the virtual machine by causing
interrupt routing to go haywire.
Add a case statement and always enable the IOAPIC on bare hardware
and KVM guests.
* Change the default to also enable the IOAPIC on all other VMs.
Cases can be added for specific disablement if necessary.
* Fixes Google Cloud Environment booting.
Summary of changes:
sys/platform/pc64/x86_64/machdep.c | 112 ++++++++++++++++++++-----------------
1 file changed, 62 insertions(+), 50 deletions(-)
DragonFly BSD source repository
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