CVS commit: src/sys/arch

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Thu May 21 21:12:31 UTC 2020

Modified Files:
        src/sys/arch/x86/acpi: acpi_wakeup.c
        src/sys/arch/x86/include: i82489var.h
        src/sys/arch/x86/x86: cpu.c lapic.c x86_machdep.c
        src/sys/arch/xen/x86: cpu.c
        src/sys/arch/xen/xen: hypervisor.c xen_clock.c

Log Message:
- Recalibrate the APIC timer using the TSC, once the TSC has in turn been
  recalibrated using the HPET.  This gets the clock interrupt firing more
  closely to HZ.

- Undo change with recent Xen merge and go back to starting the clocks in
  initclocks() on the boot CPU, and in cpu_hatch() on secondary CPUs.

- On reflection don't use HPET delay any more, it works very well but means
  going over the bus.  It's enough to use HPET to calibrate the TSC and
  APIC.

Tested on amd64 native, xen and xen PVH.


To generate a diff of this commit:
cvs rdiff -u -r1.52 -r1.53 src/sys/arch/x86/acpi/acpi_wakeup.c
cvs rdiff -u -r1.20 -r1.21 src/sys/arch/x86/include/i82489var.h
cvs rdiff -u -r1.191 -r1.192 src/sys/arch/x86/x86/cpu.c
cvs rdiff -u -r1.80 -r1.81 src/sys/arch/x86/x86/lapic.c
cvs rdiff -u -r1.142 -r1.143 src/sys/arch/x86/x86/x86_machdep.c
cvs rdiff -u -r1.135 -r1.136 src/sys/arch/xen/x86/cpu.c
cvs rdiff -u -r1.84 -r1.85 src/sys/arch/xen/xen/hypervisor.c
cvs rdiff -u -r1.5 -r1.6 src/sys/arch/xen/xen/xen_clock.c

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