Re: [PATCH v3 4/5] libxc/PM: Ensure pxstat buffers are correctly sized

[Anthony PERARD <anthony@xenproject.org>]

On Tue, May 27, 2025 at 04:26:34PM +0100, Ross Lagerwall wrote:
> diff --git a/tools/libs/ctrl/xc_pm.c b/tools/libs/ctrl/xc_pm.c
> index ff7b5ada053f..0bd79031044f 100644
> --- a/tools/libs/ctrl/xc_pm.c
> +++ b/tools/libs/ctrl/xc_pm.c
> @@ -46,35 +46,34 @@ int xc_pm_get_pxstat(xc_interface *xch, int cpuid, struct xc_px_stat *pxpt)
>  {
>      struct xen_sysctl sysctl = {};
>      /* Sizes unknown until xc_pm_get_max_px */

This comment is wrong now and can be removed.

> -    DECLARE_NAMED_HYPERCALL_BOUNCE(trans, pxpt->trans_pt, 0, XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
> -    DECLARE_NAMED_HYPERCALL_BOUNCE(pt, pxpt->pt, 0, XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
> +    DECLARE_NAMED_HYPERCALL_BOUNCE(trans, pxpt->trans_pt,
> +                                   pxpt->total * pxpt->total * sizeof(uint64_t),
> +                                   XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
> +    DECLARE_NAMED_HYPERCALL_BOUNCE(pt, pxpt->pt,
> +                                   pxpt->total * sizeof(struct xc_px_val),
> +                                   XC_HYPERCALL_BUFFER_BOUNCE_BOTH);

The rest of the patch looks fine:
Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>

Thanks,

-- 
Anthony PERARD