CVS commit: src/sys/arch/xen/xen

["Manuel Bouyer" <bouyer%netbsd.org@localhost>]

Module Name:    src
Committed By:   bouyer
Date:           Wed Sep  9 16:46:06 UTC 2020

Modified Files:
        src/sys/arch/xen/xen: hypervisor.c

Log Message:
Workarounds for amazon's Xen 4.2 version, still present on some instances:
- It doens't provides an xencons, so allow HVM_PARAM_CONSOLE_PFN to fail
- the xen clock is not fully functionnal, so don't try to use it if
  HVM_PARAM_CONSOLE_PFN failed.
- it doesn't have XEN_HVM_CPUID_VCPU_ID_PRESENT so fall back to ci_acpiid
  as ci_vcpuid in this case.

It also doesn't support the per-CPU event callback; so fix the fallback
to global vector (don't try to register more per-cpu vector)
Should fix port-amd64/55543


To generate a diff of this commit:
cvs rdiff -u -r1.87 -r1.88 src/sys/arch/xen/xen/hypervisor.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.