vfio: Setup dma map for vfio device

For each guest memory region, setup the corresponding gpa to hva map
in the kernel vfio iommu table. Then the kernel vfio driver could
get the hpa through gpa. Device could use this gpa for dma also.

BUG=chromium:992270
TEST=none

Change-Id: I04008d68ab2ed182a789d6ee8c97a0ed9e1e4756
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1581141
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Daniel Verkamp <dverkamp@chromium.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/linux.rs b/src/linux.rs
index f2433f7..5133a7c 100644
--- a/src/linux.rs
+++ b/src/linux.rs
@@ -986,7 +986,8 @@ fn create_devices(
 
     if cfg.vfio.is_some() {
         let vfio_path = cfg.vfio.as_ref().unwrap().as_path();
-        let vfiodevice = Box::new(VfioDevice::new(vfio_path, vm).map_err(Error::CreateVfioDevice)?);
+        let vfiodevice =
+            Box::new(VfioDevice::new(vfio_path, vm, mem.clone()).map_err(Error::CreateVfioDevice)?);
         let vfiopcidevice = Box::new(VfioPciDevice::new(vfiodevice));
         pci_devices.push((vfiopcidevice, simple_jail(&cfg, "vfio_device.policy")?));
     }