From: Lu Baolu <baolu.lu@linux.intel.com>
To: 周光迪 <zhouguangdi@cambricon.com>, iommu@lists.linux-foundation.org
Subject: Re: intel iommu pasid question
Date: Sun, 19 Jan 2020 09:53:09 +0800 [thread overview]
Message-ID: <b1495d7f-e15a-780d-8ef5-2838a7bf2ef1@linux.intel.com> (raw)
In-Reply-To: <2419db41.2662.16fb6dfed52.Coremail.zhouguangdi@cambricon.com>
Hi Guangdi,
On 1/18/20 12:18 PM, 周光迪 wrote:
> Hi all，
>
>
> I am currently developing a pcie device driver on Linux kernel 4.4 or
> later. I want to use pasid to directly access user-mode memory. But I
> found that the iommu of my development machine does not support
> pasid.pasid_enabled(iommu) or pasid_supported(iommu) return false.
Intel IOMMU driver currently supports SVA through APIs defined in
include/linux/intel-svm.h. We are switching to use the APIs defined
in driver/iommu/iommu.c, but it should last for some while.
Best regards,
baolu
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prev parent reply other threads:[~2020-01-19 1:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-18 4:18 intel iommu pasid question 周光迪
2020-01-18 4:20 ` 周光迪
2020-01-19 3:18 ` Liu, Yi L
2020-01-19 1:53 ` Lu Baolu [this message]
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