linux-kernel - Re: [PATCH v2 1/5] iommu/virtio: Add definitions for VIRTIO_IOMMU_F_BYPASS

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Date:   Mon, 29 Nov 2021 15:33:08 +0000
From:   Jean-Philippe Brucker <jean-philippe@...aro.org>
To:     Eric Auger <eric.auger@...hat.com>
Cc:     joro@...tes.org, will@...nel.org, mst@...hat.com,
        jasowang@...hat.com, virtualization@...ts.linux-foundation.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        sebastien.boeuf@...el.com, kevin.tian@...el.com,
        pasic@...ux.ibm.com
Subject: Re: [PATCH v2 1/5] iommu/virtio: Add definitions for
 VIRTIO_IOMMU_F_BYPASS_CONFIG

Hi Eric,

On Sat, Nov 27, 2021 at 08:59:25AM +0100, Eric Auger wrote:
> > @@ -36,6 +37,8 @@ struct virtio_iommu_config {
> >  	struct virtio_iommu_range_32		domain_range;
> >  	/* Probe buffer size */
> >  	__le32					probe_size;
> > +	__u8					bypass;
> > +	__u8					reserved[7];
> in [PATCH v3] virtio-iommu: Rework the bypass feature I see
> 
> +  u8 bypass;
> +  u8 reserved[3];
> 
> What was exactly voted?

Good catch, this should be 3. It brings the config struct to 40 bytes,
which is the size compilers generate when there is no reserved field.

Thanks,
Jean