From: "Liu, Yi L" <yi.l....@linux.intel.com>
This patch adds VFIO_IOMMU_BIND_GUEST_STAGE ioctl which aims at
passing the virtual iommu guest configuration to the VFIO driver
downto to the iommu subsystem.
Signed-off-by: Jacob Pan <jacob.jun....@linux.intel.com>
Signed-off-by: Liu, Yi L <yi.l....@linux.intel.com>
Signed-off-by: Eric Auger <eric.au...@redhat.com>
---
for SMMUV3 S1 config data passing the device parameter is not needed.
---
drivers/vfio/vfio_iommu_type1.c | 56 +++++++++++++++++++++++++++++++++++++++++
include/uapi/linux/vfio.h | 8 ++++++
2 files changed, 64 insertions(+)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index d9fd318..83c7f96 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1673,6 +1673,48 @@ static int vfio_domains_have_iommu_cache(struct
vfio_iommu *iommu)
return ret;
}
+struct vfio_iommu_task {
+ struct iommu_domain *domain;
+ void *payload;
+};
+
+static int bind_guest_stage_fn(struct device *dev, void *data)
+{
+ struct vfio_iommu_type1_bind_guest_stage *ustruct;
+ struct vfio_iommu_task *task = data;
+
+ ustruct = task->payload;
+ return iommu_bind_guest_stage(task->domain, dev, &ustruct->config);
+}
+
+static int vfio_iommu_dispatch_task(struct vfio_iommu *iommu, void *data,
+ int (*fn)(struct device *, void *))
+{
+ int ret = 0;
+ struct vfio_domain *d;
+ struct vfio_group *g;
+ struct vfio_iommu_task task;
+
+ task.payload = data;
+
+ mutex_lock(&iommu->lock);
+
+ list_for_each_entry(d, &iommu->domain_list, next) {
+ list_for_each_entry(g, &d->group_list, next) {
+ if (g->iommu_group != NULL) {
+ task.domain = d->domain;
+ ret = iommu_group_for_each_dev(
+ g->iommu_group, &task, fn);
+ if (ret != 0)
+ break;
+ }
+ }
+ }
+
+ mutex_unlock(&iommu->lock);
+ return ret;
+}
+
static long vfio_iommu_type1_ioctl(void *iommu_data,
unsigned int cmd, unsigned long arg)
{
@@ -1743,6 +1785,20 @@ static long vfio_iommu_type1_ioctl(void *iommu_data,
return copy_to_user((void __user *)arg, &unmap, minsz) ?
-EFAULT : 0;
+ } else if (cmd == VFIO_IOMMU_BIND_GUEST_STAGE) {
+ struct vfio_iommu_type1_bind_guest_stage ustruct;
+
+ minsz = offsetofend(struct vfio_iommu_type1_bind_guest_stage,
+ config);
+
+ if (copy_from_user(&ustruct, (void __user *)arg, minsz))
+ return -EFAULT;
+
+ if (ustruct.argsz < minsz || ustruct.flags)
+ return -EINVAL;
+
+ return vfio_iommu_dispatch_task(iommu, (u8 *)&ustruct,
+ bind_guest_stage_fn);
}
return -ENOTTY;
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 1aa7b82..a5801ed 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/ioctl.h>
+#include <linux/iommu.h>
#define VFIO_API_VERSION 0
@@ -665,6 +666,13 @@ struct vfio_iommu_type1_dma_unmap {
#define VFIO_IOMMU_ENABLE _IO(VFIO_TYPE, VFIO_BASE + 15)
#define VFIO_IOMMU_DISABLE _IO(VFIO_TYPE, VFIO_BASE + 16)
+struct vfio_iommu_type1_bind_guest_stage {
+ __u32 argsz;
+ __u32 flags;
+ struct iommu_guest_stage_config config;
+};
+#define VFIO_IOMMU_BIND_GUEST_STAGE _IO(VFIO_TYPE, VFIO_BASE + 22)
+
/* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */
/*
--
2.5.5
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