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

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Date:   Sat, 27 Nov 2021 08:59:25 +0100
From:   Eric Auger <eric.auger@...hat.com>
To:     Jean-Philippe Brucker <jean-philippe@...aro.org>, joro@...tes.org,
        will@...nel.org, mst@...hat.com, jasowang@...hat.com
Cc:     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 Jean,

On 11/23/21 4:52 PM, Jean-Philippe Brucker wrote:
> Add definitions for the VIRTIO_IOMMU_F_BYPASS_CONFIG, which supersedes
> VIRTIO_IOMMU_F_BYPASS.
>
> Reviewed-by: Kevin Tian <kevin.tian@...el.com>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@...aro.org>
> ---
>  include/uapi/linux/virtio_iommu.h | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h
> index 237e36a280cb..cafd8cf7febf 100644
> --- a/include/uapi/linux/virtio_iommu.h
> +++ b/include/uapi/linux/virtio_iommu.h
> @@ -16,6 +16,7 @@
>  #define VIRTIO_IOMMU_F_BYPASS			3
>  #define VIRTIO_IOMMU_F_PROBE			4
>  #define VIRTIO_IOMMU_F_MMIO			5
> +#define VIRTIO_IOMMU_F_BYPASS_CONFIG		6
>  
>  struct virtio_iommu_range_64 {
>  	__le64					start;
> @@ -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?

Thanks

Eric

>  };
>  
>  /* Request types */
> @@ -66,11 +69,14 @@ struct virtio_iommu_req_tail {
>  	__u8					reserved[3];
>  };
>  
> +#define VIRTIO_IOMMU_ATTACH_F_BYPASS		(1 << 0)
> +
>  struct virtio_iommu_req_attach {
>  	struct virtio_iommu_req_head		head;
>  	__le32					domain;
>  	__le32					endpoint;
> -	__u8					reserved[8];
> +	__le32					flags;
> +	__u8					reserved[4];
>  	struct virtio_iommu_req_tail		tail;
>  };
>