Re: [PATCH v1] virtio-mem: Don't skip alignment checks when warning about block size

[Michael S. Tsirkin]

On Mon, Oct 11, 2021 at 07:33:05PM +0200, David Hildenbrand wrote:
> If we warn about the block size being smaller than the default, we skip
> some alignment checks.
> 
> This can currently only fail on x86-64, when specifying a block size of
> 1 MiB, however, we detect the THP size of 2 MiB.
> 
> Fixes: 228957fea3a9 ("virtio-mem: Probe THP size to determine default block 
> size")
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Signed-off-by: David Hildenbrand <david@redhat.com>

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>

> ---
>  hw/virtio/virtio-mem.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
> index df91e454b2..7ce9901791 100644
> --- a/hw/virtio/virtio-mem.c
> +++ b/hw/virtio/virtio-mem.c
> @@ -701,7 +701,8 @@ static void virtio_mem_device_realize(DeviceState *dev, 
> Error **errp)
>          warn_report("'%s' property is smaller than the default block size (%"
>                      PRIx64 " MiB)", VIRTIO_MEM_BLOCK_SIZE_PROP,
>                      virtio_mem_default_block_size(rb) / MiB);
> -    } else if (!QEMU_IS_ALIGNED(vmem->requested_size, vmem->block_size)) {
> +    }
> +    if (!QEMU_IS_ALIGNED(vmem->requested_size, vmem->block_size)) {
>          error_setg(errp, "'%s' property has to be multiples of '%s' (0x%" 
> PRIx64
>                     ")", VIRTIO_MEM_REQUESTED_SIZE_PROP,
>                     VIRTIO_MEM_BLOCK_SIZE_PROP, vmem->block_size);
> -- 
> 2.31.1