Re: [PATCH 10/15] swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction

Konrad Rzeszutek Wilk
2022-04-07T00:25:32Z

> diff --git a/arch/powerpc/platforms/pseries/svm.c b/arch/powerpc/platforms/pseries/svm.c
> index c5228f4969eb2..3b4045d508ec8 100644
> --- a/arch/powerpc/platforms/pseries/svm.c
> +++ b/arch/powerpc/platforms/pseries/svm.c
> @@ -28,7 +28,7 @@ static int __init init_svm(void)
> * need to use the SWIOTLB buffer for DMA even if dma_capable() says
> * otherwise.
> */
> - swiotlb_force = SWIOTLB_FORCE;
> + ppc_swiotlb_flags |= SWIOTLB_ANY | SWIOTLB_FORCE;

This is the only place you set the ppc_swiotlb_flags.. so I wonder why
the '|=' instead of just '=' ?

Either way:
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Thank you!