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vfio: Introduce helpers to mark dirty pages of a RAM section

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Extract part of the code from vfio_sync_dirty_bitmap to form a
new helper, which allows to mark dirty pages of a RAM section.
This helper will be called for nested stage.

Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
This commit is contained in:
Chen Qun 2021-05-11 10:08:13 +08:00
parent 48e4f1552b
commit e4d4275433
1 changed files with 64 additions and 0 deletions
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64
vfio-Introduce-helpers-to-mark-dirty-pages-of-a-RAM-.patch Normal file
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@ -0,0 +1,64 @@
From ff9c1f7e3e17cc2afe1b2dfa545065e91941db8b Mon Sep 17 00:00:00 2001
From: Kunkun Jiang <jiangkunkun@huawei.com>
Date: Tue, 11 May 2021 10:08:13 +0800
Subject: [PATCH] vfio: Introduce helpers to mark dirty pages of a RAM section
Extract part of the code from vfio_sync_dirty_bitmap to form a
new helper, which allows to mark dirty pages of a RAM section.
This helper will be called for nested stage.
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
---
hw/vfio/common.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 21a866e545..5176fd3a3d 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1304,6 +1304,19 @@ err_out:
return ret;
}
+static int vfio_dma_sync_ram_section_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,
+ REAL_HOST_PAGE_ALIGN(section->offset_within_address_space),
+ int128_get64(section->size), ram_addr);
+}
+
typedef struct {
IOMMUNotifier n;
VFIOGuestIOMMU *giommu;
@@ -1345,8 +1358,6 @@ static void vfio_iommu_map_dirty_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb)
static int vfio_sync_dirty_bitmap(VFIOContainer *container,
MemoryRegionSection *section)
{
- ram_addr_t ram_addr;
-
if (memory_region_is_iommu(section->mr)) {
VFIOGuestIOMMU *giommu;
@@ -1375,12 +1386,7 @@ static int vfio_sync_dirty_bitmap(VFIOContainer *container,
return 0;
}
- ram_addr = memory_region_get_ram_addr(section->mr) +
- section->offset_within_region;
-
- return vfio_get_dirty_bitmap(container,
- REAL_HOST_PAGE_ALIGN(section->offset_within_address_space),
- int128_get64(section->size), ram_addr);
+ return vfio_dma_sync_ram_section_dirty_bitmap(container, section);
}
static void vfio_listener_log_sync(MemoryListener *listener,
--
2.27.0