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Message-ID: <2bcba1f1-e142-a752-eae5-69249f5a1021@linux.intel.com>
Date: Wed, 26 Oct 2022 20:45:15 +0800
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Cc: baolu.lu@linux.intel.com, Alex Williamson <alex.williamson@redhat.com>,
 Chaitanya Kulkarni <chaitanyak@nvidia.com>, Cornelia Huck
 <cohuck@redhat.com>, Daniel Jordan <daniel.m.jordan@oracle.com>,
 David Gibson <david@gibson.dropbear.id.au>,
 Eric Auger <eric.auger@redhat.com>, Eric Farman <farman@linux.ibm.com>,
 Jason Wang <jasowang@redhat.com>,
 Jean-Philippe Brucker <jean-philippe@linaro.org>,
 Joao Martins <joao.m.martins@oracle.com>, kvm@vger.kernel.org,
 Matthew Rosato <mjrosato@linux.ibm.com>, "Michael S. Tsirkin"
 <mst@redhat.com>, Nicolin Chen <nicolinc@nvidia.com>,
 Niklas Schnelle <schnelle@linux.ibm.com>,
 Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
 Yi Liu <yi.l.liu@intel.com>, Keqian Zhu <zhukeqian1@huawei.com>
Subject: Re: [PATCH v3 01/15] iommu: Add IOMMU_CAP_ENFORCE_CACHE_COHERENCY
Content-Language: en-US
To: Jason Gunthorpe <jgg@nvidia.com>, bpf@vger.kernel.org,
 Jonathan Corbet <corbet@lwn.net>, David Woodhouse <dwmw2@infradead.org>,
 iommu@lists.linux.dev, Joerg Roedel <joro@8bytes.org>,
 Kevin Tian <kevin.tian@intel.com>, linux-doc@vger.kernel.org,
 linux-kselftest@vger.kernel.org, llvm@lists.linux.dev,
 Nathan Chancellor <nathan@kernel.org>,
 Nick Desaulniers <ndesaulniers@google.com>, Miguel Ojeda <ojeda@kernel.org>,
 Robin Murphy <robin.murphy@arm.com>, Shuah Khan <shuah@kernel.org>,
 Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
 Tom Rix <trix@redhat.com>, Will Deacon <will@kernel.org>
References: <1-v3-402a7d6459de+24b-iommufd_jgg@nvidia.com>
From: Baolu Lu <baolu.lu@linux.intel.com>
In-Reply-To: <1-v3-402a7d6459de+24b-iommufd_jgg@nvidia.com>
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On 2022/10/26 2:12, Jason Gunthorpe wrote:
> This queries if a domain linked to a device should expect to support
> enforce_cache_coherency() so iommufd can negotiate the rules for when a
> domain should be shared or not.
> 
> For iommufd a device that declares IOMMU_CAP_ENFORCE_CACHE_COHERENCY will
> not be attached to a domain that does not support it.
> 
> Signed-off-by: Jason Gunthorpe<jgg@nvidia.com>

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>

Best regards,
baolu