From: Kirti Wankhede <kwankhede@nvidia.com>
To: <alex.williamson@redhat.com>, <cjia@nvidia.com>
Cc: Zhengxiao.zx@Alibaba-inc.com, kevin.tian@intel.com,
yi.l.liu@intel.com, yan.y.zhao@intel.com, kvm@vger.kernel.org,
eskultet@redhat.com, ziye.yang@intel.com, qemu-devel@nongnu.org,
cohuck@redhat.com, shuangtai.tst@alibaba-inc.com,
dgilbert@redhat.com, zhi.a.wang@intel.com, mlevitsk@redhat.com,
pasic@linux.ibm.com, aik@ozlabs.ru,
Kirti Wankhede <kwankhede@nvidia.com>,
eauger@redhat.com, felipe@nutanix.com,
jonathan.davies@nutanix.com, changpeng.liu@intel.com,
Ken.Xue@amd.com
Subject: [PATCH Kernel v18 6/7] vfio iommu: Add migration capability to report supported features
Date: Mon, 4 May 2020 21:28:58 +0530 [thread overview]
Message-ID: <1588607939-26441-7-git-send-email-kwankhede@nvidia.com> (raw)
In-Reply-To: <1588607939-26441-1-git-send-email-kwankhede@nvidia.com>
Added migration capability in IOMMU info chain.
User application should check IOMMU info chain for migration capability
to use dirty page tracking feature provided by kernel module.
Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
---
drivers/vfio/vfio_iommu_type1.c | 15 +++++++++++++++
include/uapi/linux/vfio.h | 14 ++++++++++++++
2 files changed, 29 insertions(+)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 8b27faf1ec38..b38d278d7bff 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -2378,6 +2378,17 @@ static int vfio_iommu_iova_build_caps(struct vfio_iommu *iommu,
return ret;
}
+static int vfio_iommu_migration_build_caps(struct vfio_info_cap *caps)
+{
+ struct vfio_iommu_type1_info_cap_migration cap_mig;
+
+ cap_mig.header.id = VFIO_IOMMU_TYPE1_INFO_CAP_MIGRATION;
+ cap_mig.header.version = 1;
+ cap_mig.flags = VFIO_IOMMU_INFO_CAPS_MIGRATION_DIRTY_PAGE_TRACK;
+
+ return vfio_info_add_capability(caps, &cap_mig.header, sizeof(cap_mig));
+}
+
static long vfio_iommu_type1_ioctl(void *iommu_data,
unsigned int cmd, unsigned long arg)
{
@@ -2427,6 +2438,10 @@ static long vfio_iommu_type1_ioctl(void *iommu_data,
if (ret)
return ret;
+ ret = vfio_iommu_migration_build_caps(&caps);
+ if (ret)
+ return ret;
+
if (caps.size) {
info.flags |= VFIO_IOMMU_INFO_CAPS;
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index e3cbf8b78623..df9ce8aaafab 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -1013,6 +1013,20 @@ struct vfio_iommu_type1_info_cap_iova_range {
struct vfio_iova_range iova_ranges[];
};
+/*
+ * The migration capability allows to report supported features for migration.
+ *
+ * The structures below define version 1 of this capability.
+ */
+#define VFIO_IOMMU_TYPE1_INFO_CAP_MIGRATION 1
+
+struct vfio_iommu_type1_info_cap_migration {
+ struct vfio_info_cap_header header;
+ __u32 flags;
+ /* supports dirty page tracking */
+#define VFIO_IOMMU_INFO_CAPS_MIGRATION_DIRTY_PAGE_TRACK (1 << 0)
+};
+
#define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
/**
--
2.7.0
next prev parent reply other threads:[~2020-05-04 16:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-04 15:58 [PATCH Kernel v18 0/7] KABIs to support migration for VFIO devices Kirti Wankhede
2020-05-04 15:58 ` [PATCH Kernel v18 1/7] vfio: UAPI for migration interface for device state Kirti Wankhede
2020-05-04 15:58 ` [PATCH Kernel v18 2/7] vfio iommu: Remove atomicity of ref_count of pinned pages Kirti Wankhede
2020-05-04 15:58 ` [PATCH Kernel v18 3/7] vfio iommu: Add ioctl definition for dirty pages tracking Kirti Wankhede
2020-05-04 15:58 ` [PATCH Kernel v18 4/7] vfio iommu: Implementation of ioctl " Kirti Wankhede
2020-05-06 8:15 ` Yan Zhao
2020-05-06 19:42 ` Kirti Wankhede
2020-05-07 18:19 ` Alex Williamson
2020-05-06 10:54 ` Cornelia Huck
2020-05-13 20:26 ` Kirti Wankhede
2020-05-04 15:58 ` [PATCH Kernel v18 5/7] vfio iommu: Update UNMAP_DMA ioctl to get dirty bitmap before unmap Kirti Wankhede
2020-05-06 22:25 ` Alex Williamson
2020-05-12 20:30 ` Kirti Wankhede
2020-05-12 21:21 ` Alex Williamson
2020-05-04 15:58 ` Kirti Wankhede [this message]
2020-05-06 22:27 ` [PATCH Kernel v18 6/7] vfio iommu: Add migration capability to report supported features Alex Williamson
2020-05-07 5:37 ` Kirti Wankhede
2020-05-07 15:17 ` Alex Williamson
2020-05-04 15:58 ` [PATCH Kernel v18 7/7] vfio: Selective dirty page tracking if IOMMU backed device pins pages Kirti Wankhede
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