linux-kernel - Re: [PATCH 1/2] iommu/vt-d: Check capability before disabling protected memory

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Message-ID: <20190322093811.GB18669@8bytes.org>
Date:   Fri, 22 Mar 2019 10:38:11 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     David Woodhouse <dwmw2@...radead.org>, ashok.raj@...el.com,
        jacob.jun.pan@...el.com, kevin.tian@...el.com, yi.l.liu@...el.com,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        mark gross <mgross@...el.com>
Subject: Re: [PATCH 1/2] iommu/vt-d: Check capability before disabling
 protected memory

On Wed, Mar 20, 2019 at 09:58:33AM +0800, Lu Baolu wrote:
> The spec states in 10.4.16 that the Protected Memory Enable
> Register should be treated as read-only for implementations
> not supporting protected memory regions (PLMR and PHMR fields
> reported as Clear in the Capability register).
> 
> Cc: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> Cc: mark gross <mgross@...el.com>
> Suggested-by: Ashok Raj <ashok.raj@...el.com>
> Fixes: f8bab73515ca5 ("intel-iommu: PMEN support")
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
> ---
>  drivers/iommu/intel-iommu.c | 3 +++
>  1 file changed, 3 insertions(+)

Applied both, thanks.