linux-kernel - RE: [PATCH v7 6/9] iommufd/selftest: Add coverage for IOMMU_HWPT

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Message-ID: <BN9PR11MB52766EC5BBA4888218914CCB8C94A@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Fri, 22 Dec 2023 04:09:52 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: "Liu, Yi L" <yi.l.liu@...el.com>, "joro@...tes.org" <joro@...tes.org>,
	"alex.williamson@...hat.com" <alex.williamson@...hat.com>, "jgg@...dia.com"
	<jgg@...dia.com>, "robin.murphy@....com" <robin.murphy@....com>,
	"baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>
CC: "cohuck@...hat.com" <cohuck@...hat.com>, "eric.auger@...hat.com"
	<eric.auger@...hat.com>, "nicolinc@...dia.com" <nicolinc@...dia.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>, "mjrosato@...ux.ibm.com"
	<mjrosato@...ux.ibm.com>, "chao.p.peng@...ux.intel.com"
	<chao.p.peng@...ux.intel.com>, "yi.y.sun@...ux.intel.com"
	<yi.y.sun@...ux.intel.com>, "peterx@...hat.com" <peterx@...hat.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"shameerali.kolothum.thodi@...wei.com"
	<shameerali.kolothum.thodi@...wei.com>, "lulu@...hat.com" <lulu@...hat.com>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>, "Duan,
 Zhenzhong" <zhenzhong.duan@...el.com>, "joao.m.martins@...cle.com"
	<joao.m.martins@...cle.com>, "Zeng, Xin" <xin.zeng@...el.com>, "Zhao, Yan Y"
	<yan.y.zhao@...el.com>, "j.granados@...sung.com" <j.granados@...sung.com>
Subject: RE: [PATCH v7 6/9] iommufd/selftest: Add coverage for
 IOMMU_HWPT_INVALIDATE ioctl

> From: Liu, Yi L <yi.l.liu@...el.com>
> Sent: Thursday, December 21, 2023 11:40 PM
> 
> From: Nicolin Chen <nicolinc@...dia.com>
> 
> Add test cases for the IOMMU_HWPT_INVALIDATE ioctl and verify it by using
> the new IOMMU_TEST_OP_MD_CHECK_IOTLB.
> 
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> Co-developed-by: Yi Liu <yi.l.liu@...el.com>
> Signed-off-by: Yi Liu <yi.l.liu@...el.com>

overall this look good:

Reviewed-by: Kevin Tian <kevin.tian@...el.com>

with two  nits:

> +
> +		num_inv = 1;
> +		inv_reqs[0].flags = IOMMU_TEST_INVALIDATE_FLAG_ALL |
> +
> IOMMU_TEST_INVALIDATE_FLAG_TRIGGER_ERROR;
> +		test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0],
> inv_reqs,
> +
> IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
> +					 sizeof(*inv_reqs), &num_inv);
> +		assert(!num_inv);

this may need adjustment upon whether we want to allow two flags together.

and let's add a test for below code for completeness:

+	if (cmd->req_num && (!cmd->reqs_uptr || !cmd->req_len)) {
+		rc = -EINVAL;
+		goto out;
+	}