From ffc7565c81b010683c3cab8efe9accd0eb90aa0d Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 14 Aug 2012 10:24:47 +0200 Subject: kvm: i8254: Finish time conversion fix 0cdd3d1444 fixed reading back the counter load time from the kernel while assuming the kernel would always update its load time on writing the state. That is only true for channel 1, and so pit_get_channel_info returned wrong output pin states for high counter values. Fix this by applying the offset also on kvm_pit_put. Now we also need to update the offset when we write the state while the VM is stopped as it keeps on changing in that state. Signed-off-by: Jan Kiszka Signed-off-by: Marcelo Tosatti (cherry picked from commit 050a46065de8e3d4ee5a04f5598d666f63d34800) Signed-off-by: Michael Roth --- hw/kvm/i8254.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/hw/kvm/i8254.c b/hw/kvm/i8254.c index c235d80a5..53d13e312 100644 --- a/hw/kvm/i8254.c +++ b/hw/kvm/i8254.c @@ -122,17 +122,23 @@ static void kvm_pit_get(PITCommonState *pit) pit_get_next_transition_time(sc, sc->count_load_time); } -static void kvm_pit_put(PITCommonState *s) +static void kvm_pit_put(PITCommonState *pit) { + KVMPITState *s = DO_UPCAST(KVMPITState, pit, pit); struct kvm_pit_state2 kpit; struct kvm_pit_channel_state *kchan; struct PITChannelState *sc; int i, ret; - kpit.flags = s->channels[0].irq_disabled ? KVM_PIT_FLAGS_HPET_LEGACY : 0; + /* The offset keeps changing as long as the VM is stopped. */ + if (s->vm_stopped) { + kvm_pit_update_clock_offset(s); + } + + kpit.flags = pit->channels[0].irq_disabled ? KVM_PIT_FLAGS_HPET_LEGACY : 0; for (i = 0; i < 3; i++) { kchan = &kpit.channels[i]; - sc = &s->channels[i]; + sc = &pit->channels[i]; kchan->count = sc->count; kchan->latched_count = sc->latched_count; kchan->count_latched = sc->count_latched; @@ -145,7 +151,7 @@ static void kvm_pit_put(PITCommonState *s) kchan->mode = sc->mode; kchan->bcd = sc->bcd; kchan->gate = sc->gate; - kchan->count_load_time = sc->count_load_time; + kchan->count_load_time = sc->count_load_time - s->kernel_clock_offset; } ret = kvm_vm_ioctl(kvm_state, -- cgit v1.2.3