On Tue, 2011-01-04 at 09:32 +0100, Jan Kiszka wrote:
> From: Jan Kiszka <[email protected]>
>
> Make sure to write the cleared MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
> and MSR_KVM_ASYNC_PF_EN to the kernel state so that a freshly booted
> guest cannot be disturbed by old values.
>
> Signed-off-by: Jan Kiszka <[email protected]>
> CC: Glauber Costa <[email protected]>
looks good.
> target-i386/kvm.c | 7 +++++++
> 1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/target-i386/kvm.c b/target-i386/kvm.c
> index d8f26bf..8267655 100644
> --- a/target-i386/kvm.c
> +++ b/target-i386/kvm.c
> @@ -845,6 +845,13 @@ static int kvm_put_msrs(CPUState *env, int level)
> if (smp_cpus == 1 || env->tsc != 0) {
> kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc);
> }
> + }
> + /*
> + * The following paravirtual MSRs have side effects on the guest or are
> + * too heavy for normal writeback. Limit them to reset or full state
> + * updates.
> + */
> + if (level >= KVM_PUT_RESET_STATE) {
> kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME,
> env->system_time_msr);
> kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK,
> env->wall_clock_msr);
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