...@infradead.org
Cc: Raj, Ashok ; linux-...@vger.kernel.org; linux-
ker...@vger.kernel.org; Busch, Keith ;
iommu@lists.linux-foundation.org; Pan, Jacob jun
Subject: [PATCH v2 2/2] iommu/vt-d: Enable PASID only if device expects
PASID in PRG Response.
From: Kuppuswamy Sathyanarayanan
In Intel IOMMU
On Wed, Feb 13, 2019 at 12:26:33AM -0800, Tian, Kevin wrote:
> >
> > diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> > index 1457f931218e..af2e4a011787 100644
> > --- a/drivers/iommu/intel-iommu.c
> > +++ b/drivers/iommu/intel-iommu.c
> > @@ -1399,7 +1399,8 @@ static void
Raj, Ashok ; linux-...@vger.kernel.org; linux-
> ker...@vger.kernel.org; Busch, Keith ;
> iommu@lists.linux-foundation.org; Pan, Jacob jun
>
> Subject: [PATCH v2 2/2] iommu/vt-d: Enable PASID only if device expects
> PASID in PRG Response.
>
> From: Kuppuswamy Sathyanarayanan
>
From: Kuppuswamy Sathyanarayanan
In Intel IOMMU, if the Page Request Queue (PRQ) is full, it will
automatically respond to the device with a success message as a keep
alive. And when sending the success message, IOMMU will include PASID in
the Response Message when the Page Request has a PASID
