Re: [Xen-devel] [PATCH v4 11/17] x86/VPMU: Add support for PMU register handling on PV guests

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 21.01.14 at 20:08, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> wrote:
> --- a/xen/arch/x86/hvm/vpmu.c
> +++ b/xen/arch/x86/hvm/vpmu.c
> @@ -400,6 +400,14 @@ long do_xenpmu_op(int op, 
> XEN_GUEST_HANDLE_PARAM(xen_pmu_params_t) arg)
>              return -EFAULT;
>          pvpmu_finish(current->domain, &pmu_params);
>          break;
> +
> +    case XENPMU_lvtpc_set:
> +        if ( copy_from_guest(&pmu_params, arg, 1) )
> +            return -EFAULT;
> +
> +        vpmu_lvtpc_update((uint32_t)pmu_params.d.val);

Once again, please don't ignore (parts of) hypercall input values.

Jan


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