linux-kernel - Re: [PATCH v7 4/9] iommufd/selftest: Add mock_domain_cache_invalidate

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Date: Tue, 26 Dec 2023 11:35:45 +0800
From: Yi Liu <yi.l.liu@...el.com>
To: "Tian, Kevin" <kevin.tian@...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 4/9] iommufd/selftest: Add
 mock_domain_cache_invalidate_user support



On 2023/12/22 11:39, Tian, Kevin wrote:
>> From: Liu, Yi L <yi.l.liu@...el.com>
>> Sent: Thursday, December 21, 2023 11:40 PM
>> +
>> +
>> +		if ((inv.flags & IOMMU_TEST_INVALIDATE_FLAG_ALL) &&
>> +		    (inv.flags &
>> IOMMU_TEST_INVALIDATE_FLAG_TRIGGER_ERROR)) {
>> +			rc = -EINVAL;
>> +			break;
>> +		}
>> +
> 
> a  nit. is there a reason why the two flags can not be set together?
> 
> in concept a mock iommu error could occur in either invalidate-one
> or invalidate-all.

I see. I'm ok to relax this check and remove the selftest case as well.

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

-- 
Regards,
Yi Liu