RE: [kvm-devel] [PATCH 2/3] kvmclock - the host part.

Dong, Eddie
2007-11-13T05:01:17Z

> +static void kvm_write_guest_time(struct kvm_vcpu *vcpu) +{
> + struct timespec ts;
> + int r;
> +
> + if (!vcpu->clock_gpa)
> + return;
> +
> + /* Updates version to the next odd number, indicating
> we're writing */
> + vcpu->hv_clock.version++;
> + kvm_write_guest(vcpu->kvm, vcpu->clock_gpa,
> &vcpu->hv_clock, PAGE_SIZE);
> +
> + kvm_get_msr(vcpu, MSR_IA32_TIME_STAMP_COUNTER,
> + &vcpu->hv_clock.last_tsc);
> +
> + ktime_get_ts(&ts);

Do we need to disable preemption here?

> + vcpu->hv_clock.now_ns = ts.tv_nsec + (NSEC_PER_SEC *
> (u64)ts.tv_sec); + vcpu->hv_clock.wc_sec = get_seconds();
> + vcpu->hv_clock.version++;
> + kvm_write_guest(vcpu->kvm, vcpu->clock_gpa,
> &vcpu->hv_clock, PAGE_SIZE);
> +}
> +
thx,eddie