linux-kernel - RE: [PATCH rc 4/8] iommu/vt-d: Update iotlb in nested domain attach

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Message-ID: <BN9PR11MB5276A9FA70F207CC454E6AA18C442@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Thu, 8 Feb 2024 08:40:26 +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 4/8] iommu/vt-d: Update iotlb in nested domain attach

> From: Liu, Yi L <yi.l.liu@...el.com>
> Sent: Thursday, February 8, 2024 4:23 PM
> 
> Should call domain_update_iotlb() to update the has_iotlb_device flag
> of the domain after attaching device to nested domain. Without it, this
> flag is not set properly and would result in missing device TLB flush.
> 
> Fixes: 9838f2bb6b6b ("iommu/vt-d: Set the nested domain to a device")
> Signed-off-by: Yi Liu <yi.l.liu@...el.com>

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