[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [RFC V2 4/4] vifo: introduce new VFIO ioctl VFIO_IOMMU_GET_
From: |
Yulei Zhang |
Subject: |
[Qemu-devel] [RFC V2 4/4] vifo: introduce new VFIO ioctl VFIO_IOMMU_GET_DIRTY_BITMAP |
Date: |
Mon, 31 Jul 2017 06:26:21 -0000 |
New VFIO ioctl VFIO_IOMMU_GET_DIRTY_BITMAP is used to fetch the
bitmap of pinned memory in iommu container, we need copy those
memory to the target during the migration as they are dirtied by
mdev devices.
Signed-off-by: Yulei Zhang <address@hidden>
---
hw/vfio/common.c | 32 ++++++++++++++++++++++++++++++++
linux-headers/linux/vfio.h | 14 ++++++++++++++
2 files changed, 46 insertions(+)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index f3ba9b9..54d43d5 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -35,6 +35,7 @@
#include "sysemu/kvm.h"
#include "trace.h"
#include "qapi/error.h"
+#include "exec/ram_addr.h"
struct vfio_group_head vfio_group_list =
QLIST_HEAD_INITIALIZER(vfio_group_list);
@@ -603,9 +604,40 @@ static void vfio_listener_region_del(MemoryListener
*listener,
}
}
+static void vfio_log_sync(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ VFIOContainer *container = container_of(listener, VFIOContainer, listener);
+ VFIOGroup *group = QLIST_FIRST(&container->group_list);
+ VFIODevice *vbasedev;
+ QLIST_FOREACH(vbasedev, &group->device_list, next) {
+ if (vbasedev->device_state == VFIO_DEVICE_START)
+ return;
+ }
+
+ struct vfio_iommu_get_dirty_bitmap *d;
+ ram_addr_t size = int128_get64(section->size);
+ unsigned long page_nr = size >> TARGET_PAGE_BITS;
+ unsigned long bitmap_size = (BITS_TO_LONGS(page_nr) + 1) * sizeof(unsigned
long);
+ d = g_malloc0(sizeof(*d) + bitmap_size);
+ d->start_addr = section->offset_within_address_space;
+ d->page_nr = page_nr;
+
+ if (ioctl(container->fd, VFIO_IOMMU_GET_DIRTY_BITMAP, d)) {
+ error_report("vfio: Failed to fetch dirty pages for migration\n");
+ goto exit;
+ }
+
+ cpu_physical_memory_set_dirty_lebitmap((unsigned long*)&d->dirty_bitmap,
d->start_addr, d->page_nr);
+
+exit:
+ g_free(d);
+}
+
static const MemoryListener vfio_memory_listener = {
.region_add = vfio_listener_region_add,
.region_del = vfio_listener_region_del,
+ .log_sync = vfio_log_sync,
};
static void vfio_listener_release(VFIOContainer *container)
diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h
index dbbe7e1..cf3d163 100644
--- a/linux-headers/linux/vfio.h
+++ b/linux-headers/linux/vfio.h
@@ -553,6 +553,20 @@ 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)
+/**
+ * VFIO_IOMMU_GET_DIRTY_BITMAP - _IOW(VFIO_TYPE, VFIO_BASE + 17,
+ * struct vfio_iommu_get_dirty_bitmap)
+ *
+ * Return: 0 on success, -errno on failure.
+ */
+struct vfio_iommu_get_dirty_bitmap{
+ __u64 start_addr;
+ __u64 page_nr;
+ __u8 dirty_bitmap[];
+};
+
+#define VFIO_IOMMU_GET_DIRTY_BITMAP _IO(VFIO_TYPE, VFIO_BASE + 17)
+
/* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */
/*
--
2.7.4
- [Qemu-devel] [RFC V2 0/4] vfio: Introduce Live migration capability to vfio_mdev device, Yulei Zhang, 2017/07/31
- [Qemu-devel] [RFC V2 1/4] vfio: introduce a new VFIO sub region for mdev device migration support, Yulei Zhang, 2017/07/31
- [Qemu-devel] [RFC V2 2/4] vfio: Add vm status change callback to stop/restart the mdev device, Yulei Zhang, 2017/07/31
- [Qemu-devel] [RFC V2 4/4] vifo: introduce new VFIO ioctl VFIO_IOMMU_GET_DIRTY_BITMAP,
Yulei Zhang <=
- [Qemu-devel] [RFC V2 3/4] vfio: Add struct vfio_vmstate_info to introduce put/get callback funtion for vfio device status save/restore, Yulei Zhang, 2017/07/31
- Re: [Qemu-devel] [RFC V2 0/4] vfio: Introduce Live migration capability to vfio_mdev device, Tian, Kevin, 2017/07/31
- Re: [Qemu-devel] [RFC V2 0/4] vfio: Introduce Live migration capability to vfio_mdev device, no-reply, 2017/07/31