On 18.10.2011, at 10:05, Bharat Bhushan wrote:
> kvmppc_emulate_dec() uses dec_nsec of type unsigned long and does below calculation:
>
> dec_nsec = vcpu->arch.dec;
> dec_nsec *= 1000;
> This will truncate if DEC value "vcpu->arch.dec" is greater than 0xffff_ffff/1000.
> For example : For tb_ticks_per_usec = 4a, we can not set decrementer more than ~58ms.
>
> Signed-off-by: Bharat Bhushan <bharat.bhushan@xxxxxxxxxxxxx>
> ---
> arch/powerpc/kvm/emulate.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
> index 8af3bad..37f41f9 100644
> --- a/arch/powerpc/kvm/emulate.c
> +++ b/arch/powerpc/kvm/emulate.c
> @@ -83,7 +83,7 @@ static bool kvmppc_dec_enabled(struct kvm_vcpu *vcpu)
>
> void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
> {
> - unsigned long dec_nsec;
> + unsigned long long dec_nsec;
u64 :)
Alex
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