linux-kernel - RE: [PATCH v3 01/13] iommu: Change type of pasid to unsigned int

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Date:   Wed, 17 Jun 2020 19:39:43 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Andy Lutomirski <luto@...nel.org>,
        "Yu, Fenghua" <fenghua.yu@...el.com>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "H Peter Anvin" <hpa@...or.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Christoph Hellwig <hch@...radeed.org>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "Pan, Jacob jun" <jacob.jun.pan@...el.com>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        "Mehta, Sohil" <sohil.mehta@...el.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        x86 <x86@...nel.org>, iommu <iommu@...ts.linux-foundation.org>
Subject: RE: [PATCH v3 01/13] iommu: Change type of pasid to unsigned int

> Is PASID in the uapi at all?


$ grep pasid include/uapi/linux/iommu.h
* @pasid: Process Address Space ID
        __u32   pasid;
 * @pasid: Process Address Space ID
        __u32   pasid;
 * @pasid: Process Address Space ID
        __u32   pasid;
 * - If the PASID bit is set, the @pasid field is populated and the invalidation
 * @pasid: process address space ID
        __u64   pasid;
 * struct iommu_inv_pasid_info - PASID Selective Invalidation Structure
 * - If the PASID bit is set, the @pasid field is populated and the invalidation
 * @pasid: process address space ID
struct iommu_inv_pasid_info {
        __u64   pasid;
 * @pasid_info: invalidation data when @granularity is %IOMMU_INV_GRANU_PASID
                struct iommu_inv_pasid_info pasid_info;
 * struct iommu_gpasid_bind_data_vtd - Intel VT-d specific data on device and guest
struct iommu_gpasid_bind_data_vtd {
 * struct iommu_gpasid_bind_data - Information about device and guest PASID binding
 * @hpasid:     Process address space ID used for the guest mm in host IOMMU
 * @gpasid:     Process address space ID used for the guest mm in guest IOMMU
struct iommu_gpasid_bind_data {
        __u64 hpasid;
        __u64 gpasid;
                struct iommu_gpasid_bind_data_vtd vtd;