| Message ID | 20221114030426.1363561-1-chenh@yusur.tech (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Maxime Coquelin |
| Headers | show |
| Series | [v4] examples/vdpa: support running in nested virtualization environment | expand |
| Context | Check | Description |
|---|---|---|
| ci/checkpatch | success | coding style OK |
| ci/iol-mellanox-Performance | success | Performance Testing PASS |
| ci/iol-aarch64-unit-testing | success | Testing PASS |
| ci/iol-intel-Functional | success | Functional Testing PASS |
| ci/Intel-compilation | success | Compilation OK |
| ci/github-robot: build | success | github build: passed |
| ci/intel-Testing | success | Testing PASS |
| ci/iol-x86_64-unit-testing | success | Testing PASS |
| ci/iol-intel-Performance | success | Performance Testing PASS |
| ci/iol-aarch64-compile-testing | success | Testing PASS |
| ci/iol-x86_64-compile-testing | success | Testing PASS |
| ci/loongarch-compilation | success | Compilation OK |
| ci/loongarch-unit-testing | success | Unit Testing PASS |
On 11/14/22 04:04, Hao Chen wrote: > When we run dpdk vdpa in the nested virtual machine vm-L1 and ping > test in vm-L2, the ping is not good. The reason for troubleshooting is > that the virtio net in vm-L2 sends control information to the vring, > and the qemu back-end device in vm-L1 cannot obtain correct data > from the vring. This problem is related to the opening of the vIOMMU. > > This patch add flag RTE_VHOST_USER_IOMMU_SUPPORT to use vhost vIOMMU > , VIRTIO_F_IOMMU_PLATFORM feature will be negotiated successfully if > virtio iommu is used in a nested virtualization environment. > > The configuration is as follows: > The host starts iommu, and the kernel parameter is added with > 'intel_iommu=on iommu=pt'. > VM-L1's xml add viommu and virtio device adds iommu='on' ats='on'. > VM-L2's xml enables viommu, and adds parameters > 'intel_iommu=on iommu=pt' to kernel. > > Then the ping test in vm-L2 is OK. > > Signed-off-by: Hao Chen <chenh@yusur.tech> > --- > v4: > *Simplify the patch. Set the flags RTE_VHOST_USER_IOMMU_SUPPORT default. > > v3: > *Modify mail title. > > v2: > *fprintf all string including the eal one. > *remove exit(1). > > examples/vdpa/main.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/examples/vdpa/main.c b/examples/vdpa/main.c > index 4c7e81d7b6..4d3203f3a7 100644 > --- a/examples/vdpa/main.c > +++ b/examples/vdpa/main.c > @@ -214,6 +214,8 @@ start_vdpa(struct vdpa_port *vport) > if (client_mode) > vport->flags |= RTE_VHOST_USER_CLIENT; > > + vport->flags |= RTE_VHOST_USER_IOMMU_SUPPORT; > + > if (access(socket_path, F_OK) != -1 && !client_mode) { > RTE_LOG(ERR, VDPA, > "%s exists, please remove it or specify another file and try again.\n", Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Thanks, Maxime
diff --git a/examples/vdpa/main.c b/examples/vdpa/main.c index 4c7e81d7b6..4d3203f3a7 100644 --- a/examples/vdpa/main.c +++ b/examples/vdpa/main.c @@ -214,6 +214,8 @@ start_vdpa(struct vdpa_port *vport) if (client_mode) vport->flags |= RTE_VHOST_USER_CLIENT; + vport->flags |= RTE_VHOST_USER_IOMMU_SUPPORT; + if (access(socket_path, F_OK) != -1 && !client_mode) { RTE_LOG(ERR, VDPA, "%s exists, please remove it or specify another file and try again.\n",
When we run dpdk vdpa in the nested virtual machine vm-L1 and ping test in vm-L2, the ping is not good. The reason for troubleshooting is that the virtio net in vm-L2 sends control information to the vring, and the qemu back-end device in vm-L1 cannot obtain correct data from the vring. This problem is related to the opening of the vIOMMU. This patch add flag RTE_VHOST_USER_IOMMU_SUPPORT to use vhost vIOMMU , VIRTIO_F_IOMMU_PLATFORM feature will be negotiated successfully if virtio iommu is used in a nested virtualization environment. The configuration is as follows: The host starts iommu, and the kernel parameter is added with 'intel_iommu=on iommu=pt'. VM-L1's xml add viommu and virtio device adds iommu='on' ats='on'. VM-L2's xml enables viommu, and adds parameters 'intel_iommu=on iommu=pt' to kernel. Then the ping test in vm-L2 is OK. Signed-off-by: Hao Chen <chenh@yusur.tech> --- v4: *Simplify the patch. Set the flags RTE_VHOST_USER_IOMMU_SUPPORT default. v3: *Modify mail title. v2: *fprintf all string including the eal one. *remove exit(1). examples/vdpa/main.c | 2 ++ 1 file changed, 2 insertions(+)