linux-kernel - [PATCH v2 17/19] iommu: Add max num of cache and granu types

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Message-Id: <1556062279-64135-18-git-send-email-jacob.jun.pan@linux.intel.com>
Date:   Tue, 23 Apr 2019 16:31:17 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Eric Auger <eric.auger@...hat.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jean-Philippe Brucker <jean-philippe.brucker@....com>
Cc:     "Yi Liu" <yi.l.liu@...el.com>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        Raj Ashok <ashok.raj@...el.com>,
        "Christoph Hellwig" <hch@...radead.org>,
        "Lu Baolu" <baolu.lu@...ux.intel.com>,
        Andriy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: [PATCH v2 17/19] iommu: Add max num of cache and granu types

To convert to/from cache types and granularities between generic and
VT-d specific counterparts, a 2D arrary is used. Introduce the limits
to help define the converstion array size.

Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
---
 include/uapi/linux/iommu.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h
index 5c95905..2d8fac8 100644
--- a/include/uapi/linux/iommu.h
+++ b/include/uapi/linux/iommu.h
@@ -197,6 +197,7 @@ struct iommu_inv_addr_info {
 	__u64	granule_size;
 	__u64	nb_granules;
 };
+#define NR_IOMMU_CACHE_INVAL_GRANU	(3)
 
 /**
  * First level/stage invalidation information
@@ -235,6 +236,7 @@ struct iommu_cache_invalidate_info {
 		struct iommu_inv_addr_info addr_info;
 	};
 };
+#define NR_IOMMU_CACHE_TYPE		(3)
 /**
  * struct gpasid_bind_data - Information about device and guest PASID binding
  * @gcr3:	Guest CR3 value from guest mm
-- 
2.7.4