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Fri, 12 Mar 2021 12:58:39 +0000 Subject: Re: [PATCH RFC v1 09/15] iommu/virtio: Update table format probing header To: Jean-Philippe Brucker Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, joro@8bytes.org, will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com, eric.auger@redhat.com, alex.williamson@redhat.com, kevin.tian@intel.com, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com, lorenzo.pieralisi@arm.com, shameerali.kolothum.thodi@huawei.com References: <20210115121342.15093-1-vivek.gautam@arm.com> <20210115121342.15093-10-vivek.gautam@arm.com> From: Vivek Kumar Gautam Message-ID: <84bd0439-9517-37b7-8827-08c6effdadd6@arm.com> Date: Fri, 12 Mar 2021 18:28:31 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [217.140.105.56] X-ClientProxiedBy: PN1PR01CA0115.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c00::31) To AM0PR08MB3268.eurprd08.prod.outlook.com (2603:10a6:208:65::26) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [10.162.16.71] (217.140.105.56) by PN1PR01CA0115.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c00::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3912.17 via Frontend Transport; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Mar 2021 12:58:47.3969 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 58f3cf3b-a97b-4c27-1f89-08d8e5569365 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT026.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB6421 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/3/21 10:51 PM, Jean-Philippe Brucker wrote: > On Fri, Jan 15, 2021 at 05:43:36PM +0530, Vivek Gautam wrote: >> Add info about asid_bits and additional flags to table format >> probing header. >> >> Signed-off-by: Vivek Gautam >> Cc: Joerg Roedel >> Cc: Will Deacon >> Cc: Michael S. Tsirkin >> Cc: Robin Murphy >> Cc: Jean-Philippe Brucker >> Cc: Eric Auger >> Cc: Alex Williamson >> Cc: Kevin Tian >> Cc: Jacob Pan >> Cc: Liu Yi L >> Cc: Lorenzo Pieralisi >> Cc: Shameerali Kolothum Thodi >> --- >> include/uapi/linux/virtio_iommu.h | 5 ++++- >> 1 file changed, 4 insertions(+), 1 deletion(-) >> >> diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h >> index 43821e33e7af..8a0624bab4b2 100644 >> --- a/include/uapi/linux/virtio_iommu.h >> +++ b/include/uapi/linux/virtio_iommu.h >> @@ -169,7 +169,10 @@ struct virtio_iommu_probe_pasid_size { >> struct virtio_iommu_probe_table_format { >> struct virtio_iommu_probe_property head; >> __le16 format; >> - __u8 reserved[2]; >> + __le16 asid_bits; >> + >> + __le32 flags; > > This struct should only contain the head and format fields. asid and flags > should go in a specialized structure - virtio_iommu_probe_pgt_arm64 in the > latest spec draft, where I dropped the asid_bits field in favor of an > "ASID16" flag. Right, will take care of this looking at the spec draft. Best regards Vivek > > Thanks, > Jean >