linux-kernel - Re: [PATCH] iommu/vt-d: Fix identity map bounds in si_domain

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Message-ID: <CAMC_AXXy+2Fc8RcGGFh0abL0BRLHwnR-9BmypFNCJpVuPoHmJg@mail.gmail.com>
Date: Fri, 12 Jul 2024 00:05:52 -0700
From: Jon Pan-Doh <pandoh@...gle.com>
To: Baolu Lu <baolu.lu@...ux.intel.com>
Cc: David Woodhouse <dwmw2@...radead.org>, Kevin Tian <kevin.tian@...el.com>, 
	Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>, 
	"H. Peter Anvin" <hpa@...ux.intel.com>, Tejun Heo <tj@...nel.org>, iommu@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, Sudheer Dantuluri <dantuluris@...gle.com>, 
	Gary Zibrat <gzibrat@...gle.com>
Subject: Re: [PATCH] iommu/vt-d: Fix identity map bounds in si_domain_init()

On Tue, Jul 9, 2024 at 7:45 PM Baolu Lu <baolu.lu@...ux.intel.com> wrote:
> Do you mind telling me on which platform did you test this fix? My
> understanding is that modern VT-d hardware supports hardware pass
> through mode, hence this piece of code won't be executed anymore.

We tested it in a VM using an emulated vIOMMU setup. Hope that helps.

Thanks,
Jon