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Message-ID: <20140616150451.GP16758@arm.com>
Date: Mon, 16 Jun 2014 16:04:51 +0100
From: Will Deacon <will.deacon@....com>
To: Antonios Motakis <a.motakis@...tualopensystems.com>
Cc: "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
"tech@...tualopensystems.com" <tech@...tualopensystems.com>,
"a.rigo@...tualopensystems.com" <a.rigo@...tualopensystems.com>,
"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
"christoffer.dall@...aro.org" <christoffer.dall@...aro.org>,
"kim.phillips@...escale.com" <kim.phillips@...escale.com>,
"stuart.yoder@...escale.com" <stuart.yoder@...escale.com>,
"eric.auger@...aro.org" <eric.auger@...aro.org>,
Joerg Roedel <joro@...tes.org>,
"moderated list:ARM SMMU DRIVER"
<linux-arm-kernel@...ts.infradead.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v6 03/20] iommu/arm-smmu: add IOMMU_CAP_NOEXEC to the
ARM SMMU driver
On Thu, Jun 05, 2014 at 06:03:11PM +0100, Antonios Motakis wrote:
> The ARM SMMU supports the IOMMU_NOEXEC protection flag. Add the
> corresponding IOMMU capability.
>
> Signed-off-by: Antonios Motakis <a.motakis@...tualopensystems.com>
> ---
> drivers/iommu/arm-smmu.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
> index d5a2200..15ab2af 100644
> --- a/drivers/iommu/arm-smmu.c
> +++ b/drivers/iommu/arm-smmu.c
> @@ -1544,6 +1544,8 @@ static int arm_smmu_domain_has_cap(struct iommu_domain *domain,
> if (smmu_domain->root_cfg.smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
> caps |= IOMMU_CAP_CACHE_COHERENCY;
>
> + caps |= IOMMU_CAP_NOEXEC;
> +
Just initialise caps to IOMMU_CAP_NOEXEC.
Will
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