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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Eric Auger <eric.auger@redhat.com>,
	eric.auger.pro@gmail.com, joro@8bytes.org,
	iommu@lists.linux-foundation.org
Subject: Re: [PATCH] iommu/vt-d: Fix QI_DEV_IOTLB_PFSID and QI_DEV_EIOTLB_PFSID macros
Date: Sat, 9 Nov 2019 08:45:12 +0800
Message-ID: <6c3be6b6-18ac-e0ad-cd41-6f9efe4e02e3@linux.intel.com> (raw)
In-Reply-To: <20191108155803.15051-1-eric.auger@redhat.com>

Hi Eric,

On 11/8/19 11:58 PM, Eric Auger wrote:
> For both PASID-based-Device-TLB Invalidate Descriptor and
> Device-TLB Invalidate Descriptor, the Physical Function Source-ID
> value is split according to this layout:
> 
> PFSID[3:0] is set at offset 12 and PFSID[15:4] is put at offset 52.
> Fix the part laid out at offset 52.
> 
> Fixes: 0f725561e1684 ("iommu/vt-d: Add definitions for PFSID")
> Signed-off-by: Eric Auger <eric.auger@redhat.com>

Please cc this to stable as well.

Cc: stable@vger.kernel.org # v4.19+

Good catch!

Acked-by: Lu Baolu <baolu.lu@linux.intel.com>

Best regards,
baolu


> ---
>   include/linux/intel-iommu.h | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
> index ed11ef594378..6d8bf4bdf240 100644
> --- a/include/linux/intel-iommu.h
> +++ b/include/linux/intel-iommu.h
> @@ -336,7 +336,8 @@ enum {
>   #define QI_DEV_IOTLB_SID(sid)	((u64)((sid) & 0xffff) << 32)
>   #define QI_DEV_IOTLB_QDEP(qdep)	(((qdep) & 0x1f) << 16)
>   #define QI_DEV_IOTLB_ADDR(addr)	((u64)(addr) & VTD_PAGE_MASK)
> -#define QI_DEV_IOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | ((u64)(pfsid & 0xfff) << 52))
> +#define QI_DEV_IOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | \
> +				   ((u64)((pfsid >> 4) & 0xfff) << 52))
>   #define QI_DEV_IOTLB_SIZE	1
>   #define QI_DEV_IOTLB_MAX_INVS	32
>   
> @@ -360,7 +361,8 @@ enum {
>   #define QI_DEV_EIOTLB_PASID(p)	(((u64)p) << 32)
>   #define QI_DEV_EIOTLB_SID(sid)	((u64)((sid) & 0xffff) << 16)
>   #define QI_DEV_EIOTLB_QDEP(qd)	((u64)((qd) & 0x1f) << 4)
> -#define QI_DEV_EIOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | ((u64)(pfsid & 0xfff) << 52))
> +#define QI_DEV_EIOTLB_PFSID(pfsid) (((u64)(pfsid & 0xf) << 12) | \
> +				    ((u64)((pfsid >> 4) & 0xfff) << 52))
>   #define QI_DEV_EIOTLB_MAX_INVS	32
>   
>   /* Page group response descriptor QW0 */
> 
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  parent reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-08 15:58 Eric Auger
2019-11-08 23:02 ` Jacob Pan
2019-11-09  0:45 ` Lu Baolu [this message]
2019-11-11 15:11 ` Joerg Roedel

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