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Message-Id: <1461832118-5668-2-git-send-email-eric.auger@linaro.org>
Date: Thu, 28 Apr 2016 08:28:32 +0000
From: Eric Auger <eric.auger@...aro.org>
To: eric.auger@...com, eric.auger@...aro.org, robin.murphy@....com,
alex.williamson@...hat.com, will.deacon@....com, joro@...tes.org,
tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
christoffer.dall@...aro.org, linux-arm-kernel@...ts.infradead.org
Cc: patches@...aro.org, linux-kernel@...r.kernel.org,
Bharat.Bhushan@...escale.com, pranav.sawargaonkar@...il.com,
p.fedin@...sung.com, iommu@...ts.linux-foundation.org,
Jean-Philippe.Brucker@....com, julien.grall@....com
Subject: [PATCH v8 1/7] vfio: introduce a vfio_dma type field
We introduce a vfio_dma type since we will need to discriminate
different types of dma slots:
- VFIO_IOVA_USER: IOVA region used to map user vaddr
- VFIO_IOVA_RESERVED: IOVA region reserved to map host device PA such
as MSI doorbells
Signed-off-by: Eric Auger <eric.auger@...aro.org>
---
v6 -> v7:
- add VFIO_IOVA_ANY
- do not introduce yet any VFIO_IOVA_RESERVED handling
---
drivers/vfio/vfio_iommu_type1.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 75b24e9..aaf5a6c 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -53,6 +53,16 @@ module_param_named(disable_hugepages,
MODULE_PARM_DESC(disable_hugepages,
"Disable VFIO IOMMU support for IOMMU hugepages.");
+enum vfio_iova_type {
+ VFIO_IOVA_USER = 0, /* standard IOVA used to map user vaddr */
+ /*
+ * IOVA reserved to map special host physical addresses,
+ * MSI frames for instance
+ */
+ VFIO_IOVA_RESERVED,
+ VFIO_IOVA_ANY, /* matches any IOVA type */
+};
+
struct vfio_iommu {
struct list_head domain_list;
struct mutex lock;
@@ -75,6 +85,7 @@ struct vfio_dma {
unsigned long vaddr; /* Process virtual addr */
size_t size; /* Map size (bytes) */
int prot; /* IOMMU_READ/WRITE */
+ enum vfio_iova_type type; /* type of IOVA */
};
struct vfio_group {
--
1.9.1
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