linux-kernel - Re: [PATCH v3 35/38] virtio_mem: convert to LE accessors

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Date:   Mon, 10 Aug 2020 09:57:33 +0200
From:   David Hildenbrand <david@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:     Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v3 35/38] virtio_mem: convert to LE accessors

On 05.08.20 15:44, Michael S. Tsirkin wrote:
> Virtio mem is modern-only. Use LE accessors for config space.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
>  drivers/virtio/virtio_mem.c | 30 +++++++++++++++---------------
>  1 file changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
> index f26f5f64ae82..c08512fcea90 100644
> --- a/drivers/virtio/virtio_mem.c
> +++ b/drivers/virtio/virtio_mem.c
> @@ -1530,21 +1530,21 @@ static void virtio_mem_refresh_config(struct virtio_mem *vm)
>  	uint64_t new_plugged_size, usable_region_size, end_addr;
>  
>  	/* the plugged_size is just a reflection of what _we_ did previously */
> -	virtio_cread(vm->vdev, struct virtio_mem_config, plugged_size,
> -		     &new_plugged_size);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config, plugged_size,
> +			&new_plugged_size);
>  	if (WARN_ON_ONCE(new_plugged_size != vm->plugged_size))
>  		vm->plugged_size = new_plugged_size;
>  
>  	/* calculate the last usable memory block id */
> -	virtio_cread(vm->vdev, struct virtio_mem_config,
> -		     usable_region_size, &usable_region_size);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config,
> +			usable_region_size, &usable_region_size);
>  	end_addr = vm->addr + usable_region_size;
>  	end_addr = min(end_addr, phys_limit);
>  	vm->last_usable_mb_id = virtio_mem_phys_to_mb_id(end_addr) - 1;
>  
>  	/* see if there is a request to change the size */
> -	virtio_cread(vm->vdev, struct virtio_mem_config, requested_size,
> -		     &vm->requested_size);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config, requested_size,
> +			&vm->requested_size);
>  
>  	dev_info(&vm->vdev->dev, "plugged size: 0x%llx", vm->plugged_size);
>  	dev_info(&vm->vdev->dev, "requested size: 0x%llx", vm->requested_size);
> @@ -1677,16 +1677,16 @@ static int virtio_mem_init(struct virtio_mem *vm)
>  	}
>  
>  	/* Fetch all properties that can't change. */
> -	virtio_cread(vm->vdev, struct virtio_mem_config, plugged_size,
> -		     &vm->plugged_size);
> -	virtio_cread(vm->vdev, struct virtio_mem_config, block_size,
> -		     &vm->device_block_size);
> -	virtio_cread(vm->vdev, struct virtio_mem_config, node_id,
> -		     &node_id);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config, plugged_size,
> +			&vm->plugged_size);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config, block_size,
> +			&vm->device_block_size);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config, node_id,
> +			&node_id);
>  	vm->nid = virtio_mem_translate_node_id(vm, node_id);
> -	virtio_cread(vm->vdev, struct virtio_mem_config, addr, &vm->addr);
> -	virtio_cread(vm->vdev, struct virtio_mem_config, region_size,
> -		     &vm->region_size);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config, addr, &vm->addr);
> +	virtio_cread_le(vm->vdev, struct virtio_mem_config, region_size,
> +			&vm->region_size);
>  
>  	/*
>  	 * We always hotplug memory in memory block granularity. This way,
> 

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Thanks,

David / dhildenb