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From: Kirti Wankhede <kwankhede@nvidia.com>
To: <alex.williamson@redhat.com>, <cjia@nvidia.com>
Cc: cohuck@redhat.com, zhi.wang.linux@gmail.com, aik@ozlabs.ru,
	Zhengxiao.zx@Alibaba-inc.com, shuangtai.tst@alibaba-inc.com,
	qemu-devel@nongnu.org, peterx@redhat.com,
	Kirti Wankhede <kwankhede@nvidia.com>,
	eauger@redhat.com, artemp@nvidia.com, yi.l.liu@intel.com,
	quintela@redhat.com, ziye.yang@intel.com, armbru@redhat.com,
	mlevitsk@redhat.com, pasic@linux.ibm.com, felipe@nutanix.com,
	zhi.a.wang@intel.com, mcrossley@nvidia.com, kevin.tian@intel.com,
	yan.y.zhao@intel.com, dgilbert@redhat.com,
	changpeng.liu@intel.com, eskultet@redhat.com, Ken.Xue@amd.com,
	jonathan.davies@nutanix.com, pbonzini@redhat.com,
	dnigam@nvidia.com
Subject: [PATCH v28 13/17] vfio: Add vfio_listener_log_sync to mark dirty pages
Date: Fri, 23 Oct 2020 16:10:39 +0530	[thread overview]
Message-ID: <1603449643-12851-14-git-send-email-kwankhede@nvidia.com> (raw)
In-Reply-To: <1603449643-12851-1-git-send-email-kwankhede@nvidia.com>

vfio_listener_log_sync gets list of dirty pages from container using
VFIO_IOMMU_GET_DIRTY_BITMAP ioctl and mark those pages dirty when all
devices are stopped and saving state.
Return early for the RAM block section of mapped MMIO region.

Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Neo Jia <cjia@nvidia.com>
---
 hw/vfio/common.c     | 116 +++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/vfio/trace-events |   1 +
 2 files changed, 117 insertions(+)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index d4959c036dd1..2634387df948 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -29,6 +29,7 @@
 #include "hw/vfio/vfio.h"
 #include "exec/address-spaces.h"
 #include "exec/memory.h"
+#include "exec/ram_addr.h"
 #include "hw/hw.h"
 #include "qemu/error-report.h"
 #include "qemu/main-loop.h"
@@ -37,6 +38,7 @@
 #include "sysemu/reset.h"
 #include "trace.h"
 #include "qapi/error.h"
+#include "migration/migration.h"
 
 VFIOGroupList vfio_group_list =
     QLIST_HEAD_INITIALIZER(vfio_group_list);
@@ -287,6 +289,39 @@ const MemoryRegionOps vfio_region_ops = {
 };
 
 /*
+ * Device state interfaces
+ */
+
+static bool vfio_devices_all_stopped_and_saving(VFIOContainer *container)
+{
+    VFIOGroup *group;
+    VFIODevice *vbasedev;
+    MigrationState *ms = migrate_get_current();
+
+    if (!migration_is_setup_or_active(ms->state)) {
+        return false;
+    }
+
+    QLIST_FOREACH(group, &container->group_list, container_next) {
+        QLIST_FOREACH(vbasedev, &group->device_list, next) {
+            VFIOMigration *migration = vbasedev->migration;
+
+            if (!migration) {
+                return false;
+            }
+
+            if ((migration->device_state & VFIO_DEVICE_STATE_SAVING) &&
+                !(migration->device_state & VFIO_DEVICE_STATE_RUNNING)) {
+                continue;
+            } else {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+/*
  * DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
  */
 static int vfio_dma_unmap(VFIOContainer *container,
@@ -812,9 +847,90 @@ static void vfio_listener_region_del(MemoryListener *listener,
     }
 }
 
+static int vfio_get_dirty_bitmap(VFIOContainer *container, uint64_t iova,
+                                 uint64_t size, ram_addr_t ram_addr)
+{
+    struct vfio_iommu_type1_dirty_bitmap *dbitmap;
+    struct vfio_iommu_type1_dirty_bitmap_get *range;
+    uint64_t pages;
+    int ret;
+
+    dbitmap = g_malloc0(sizeof(*dbitmap) + sizeof(*range));
+
+    dbitmap->argsz = sizeof(*dbitmap) + sizeof(*range);
+    dbitmap->flags = VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP;
+    range = (struct vfio_iommu_type1_dirty_bitmap_get *)&dbitmap->data;
+    range->iova = iova;
+    range->size = size;
+
+    /*
+     * cpu_physical_memory_set_dirty_lebitmap() expects pages in bitmap of
+     * TARGET_PAGE_SIZE to mark those dirty. Hence set bitmap's pgsize to
+     * TARGET_PAGE_SIZE.
+     */
+    range->bitmap.pgsize = TARGET_PAGE_SIZE;
+
+    pages = TARGET_PAGE_ALIGN(range->size) >> TARGET_PAGE_BITS;
+    range->bitmap.size = ROUND_UP(pages, sizeof(__u64) * BITS_PER_BYTE) /
+                                         BITS_PER_BYTE;
+    range->bitmap.data = g_try_malloc0(range->bitmap.size);
+    if (!range->bitmap.data) {
+        ret = -ENOMEM;
+        goto err_out;
+    }
+
+    ret = ioctl(container->fd, VFIO_IOMMU_DIRTY_PAGES, dbitmap);
+    if (ret) {
+        error_report("Failed to get dirty bitmap for iova: 0x%llx "
+                "size: 0x%llx err: %d",
+                range->iova, range->size, errno);
+        goto err_out;
+    }
+
+    cpu_physical_memory_set_dirty_lebitmap((uint64_t *)range->bitmap.data,
+                                            ram_addr, pages);
+
+    trace_vfio_get_dirty_bitmap(container->fd, range->iova, range->size,
+                                range->bitmap.size, ram_addr);
+err_out:
+    g_free(range->bitmap.data);
+    g_free(dbitmap);
+
+    return ret;
+}
+
+static int vfio_sync_dirty_bitmap(VFIOContainer *container,
+                                  MemoryRegionSection *section)
+{
+    ram_addr_t ram_addr;
+
+    ram_addr = memory_region_get_ram_addr(section->mr) +
+               section->offset_within_region;
+
+    return vfio_get_dirty_bitmap(container,
+                       TARGET_PAGE_ALIGN(section->offset_within_address_space),
+                       int128_get64(section->size), ram_addr);
+}
+
+static void vfio_listerner_log_sync(MemoryListener *listener,
+        MemoryRegionSection *section)
+{
+    VFIOContainer *container = container_of(listener, VFIOContainer, listener);
+
+    if (vfio_listener_skipped_section(section) ||
+        !container->dirty_pages_supported) {
+        return;
+    }
+
+    if (vfio_devices_all_stopped_and_saving(container)) {
+        vfio_sync_dirty_bitmap(container, section);
+    }
+}
+
 static const MemoryListener vfio_memory_listener = {
     .region_add = vfio_listener_region_add,
     .region_del = vfio_listener_region_del,
+    .log_sync = vfio_listerner_log_sync,
 };
 
 static void vfio_listener_release(VFIOContainer *container)
diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events
index a75b5208818c..dd991bd8f265 100644
--- a/hw/vfio/trace-events
+++ b/hw/vfio/trace-events
@@ -163,3 +163,4 @@ vfio_load_device_config_state(const char *name) " (%s)"
 vfio_load_state(const char *name, uint64_t data) " (%s) data 0x%"PRIx64
 vfio_load_state_device_data(const char *name, uint64_t data_offset, uint64_t data_size) " (%s) Offset 0x%"PRIx64" size 0x%"PRIx64
 vfio_load_cleanup(const char *name) " (%s)"
+vfio_get_dirty_bitmap(int fd, uint64_t iova, uint64_t size, uint64_t bitmap_size, uint64_t start) "container fd=%d, iova=0x%"PRIx64" size= 0x%"PRIx64" bitmap_size=0x%"PRIx64" start=0x%"PRIx64
-- 
2.7.0



  parent reply	other threads:[~2020-10-23 11:20 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-23 10:40 [PATCH v28 00/17] Add migration support for VFIO devices Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 01/17] vfio: Add function to unmap VFIO region Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 02/17] vfio: Add vfio_get_object callback to VFIODeviceOps Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 03/17] vfio: Add save and load functions for VFIO PCI devices Kirti Wankhede
2020-10-24 11:53   ` Yan Zhao
2020-10-24 14:16     ` Alex Williamson
2020-10-24 19:48       ` Kirti Wankhede
2020-10-24 20:23         ` Alex Williamson
2020-10-25  4:26       ` Yan Zhao
2020-10-23 10:40 ` [PATCH v28 04/17] vfio: Add migration region initialization and finalize function Kirti Wankhede
2020-10-23 11:24   ` Cornelia Huck
2020-10-24 20:22     ` Kirti Wankhede
2020-10-23 16:52   ` Alex Williamson
2020-10-24  9:39     ` Kirti Wankhede
2020-10-24 14:21       ` Alex Williamson
2020-10-24 14:48         ` Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 05/17] vfio: Add VM state change handler to know state of VM Kirti Wankhede
2020-10-23 11:32   ` Cornelia Huck
2020-10-24 20:27     ` Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 06/17] vfio: Add migration state change notifier Kirti Wankhede
2020-10-23 11:45   ` Cornelia Huck
2020-10-23 10:40 ` [PATCH v28 07/17] vfio: Register SaveVMHandlers for VFIO device Kirti Wankhede
2020-10-23 12:18   ` Cornelia Huck
2020-10-24 11:26   ` Yan Zhao
2020-10-24 20:35     ` Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 08/17] vfio: Add save state functions to SaveVMHandlers Kirti Wankhede
2020-10-24 11:59   ` Yan Zhao
2020-10-23 10:40 ` [PATCH v28 09/17] vfio: Add load " Kirti Wankhede
2020-10-24 11:58   ` Yan Zhao
2020-10-23 10:40 ` [PATCH v28 10/17] memory: Set DIRTY_MEMORY_MIGRATION when IOMMU is enabled Kirti Wankhede
2020-10-24 12:00   ` Yan Zhao
2020-10-23 10:40 ` [PATCH v28 11/17] vfio: Get migration capability flags for container Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 12/17] vfio: Add function to start and stop dirty pages tracking Kirti Wankhede
2020-10-23 10:40 ` Kirti Wankhede [this message]
2020-10-23 10:40 ` [PATCH v28 14/17] vfio: Dirty page tracking when vIOMMU is enabled Kirti Wankhede
2020-10-24 11:56   ` Yan Zhao
2020-10-23 10:40 ` [PATCH v28 15/17] vfio: Add ioctl to get dirty pages bitmap during dma unmap Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 16/17] vfio: Make vfio-pci device migration capable Kirti Wankhede
2020-10-23 10:40 ` [PATCH v28 17/17] qapi: Add VFIO devices migration stats in Migration stats Kirti Wankhede
2020-10-24 16:56 ` [PATCH v28 00/17] Add migration support for VFIO devices Philippe Mathieu-Daudé
2020-10-24 17:48   ` Kirti Wankhede
2020-10-24 19:43     ` Philippe Mathieu-Daudé

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