linux-kernel - RE: [PATCH rc 8/8] iommu/vt-d: Add missing dirty tracking set for parent domain

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Message-ID: <BN9PR11MB52761895C4DB8861C32A4B698C442@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Thu, 8 Feb 2024 08:53:31 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: "Liu, Yi L" <yi.l.liu@...el.com>, "joro@...tes.org" <joro@...tes.org>,
	"jgg@...dia.com" <jgg@...dia.com>, "baolu.lu@...ux.intel.com"
	<baolu.lu@...ux.intel.com>
CC: "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
	"robin.murphy@....com" <robin.murphy@....com>, "eric.auger@...hat.com"
	<eric.auger@...hat.com>, "nicolinc@...dia.com" <nicolinc@...dia.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>, "chao.p.peng@...ux.intel.com"
	<chao.p.peng@...ux.intel.com>, "yi.y.sun@...ux.intel.com"
	<yi.y.sun@...ux.intel.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>
Subject: RE: [PATCH rc 8/8] iommu/vt-d: Add missing dirty tracking set for
 parent domain

> From: Liu, Yi L <yi.l.liu@...el.com>
> Sent: Thursday, February 8, 2024 4:23 PM
> 
> @@ -4760,6 +4790,12 @@ static int intel_iommu_set_dirty_tracking(struct
> iommu_domain *domain,
>  	if (ret)
>  		goto err_unwind;
> 
> +	if (dmar_domain->nested_parent) {
> +		ret = parent_domain_set_dirty_tracking(dmar_domain,
> enable);
> +		if (ret)
> +			goto err_unwind;
> +	}
> +

there also lack of setting dirty tracking when a device is attached to the
nested domain while the parent already has dirty-tracking enabled.

but looks even w/o nesting this is missed in the attach path.

could be fixed separately. so for this one:

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