Jan Kiszka 0cdd3d1444 kvm: i8254: Fix conversion of in-kernel to userspace state ...

Due to a offset between the clock used to generate the in-kernel
count_load_time (CLOCK_MONOTONIC) and the clock used for processing this
in userspace (vm_clock), reading back the output of PIT channel 2 via
port 0x61 was broken. One use cases that suffered from it was the CPU
frequency calibration of SeaBIOS, which also affected IDE/AHCI timeouts.

This fixes it by calibrating the offset between both clocks on
kvm_pit_get and adjusting the kernel value before saving it in the
userspace state. As the calibration only works while the vm_clock is
running, we cache the in-kernel state across stopped phases.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

2012-06-11 14:18:23 +03:00

..

apic.c

kvm/apic: correct short memset

2012-06-11 12:57:40 +03:00

clock.c

kvmclock: guest stop notification

2012-04-12 19:01:42 -03:00

clock.h

…

i8254.c

kvm: i8254: Fix conversion of in-kernel to userspace state

2012-06-11 14:18:23 +03:00

i8259.c

i8259: Do not clear level-triggered lines in IRR on init

2012-02-17 09:58:22 -06:00

ioapic.c

qom: Unify type registration

2012-02-15 09:39:21 -06:00