On 7/21/2023 12:39 PM, Igor de Paula wrote:
> I am trying to use virtio_user for an interface with the
> kernel: https://doc.dpdk.org/guides/howto/virtio_user_as_exception_path.html <https://doc.dpdk.org/guides/howto/virtio_user_as_exception_path.html>
> I think this requires IOVA as va.
>
I am not sure if virtio-user has IOVA as VA requirement, cc'ed Chenbo,
he may know better.
Meanwhile can you give a try to 'enable_unsafe_noiommu_mode' and
'--iova-mode=pa'?
> It does work with Intel host and IOMMU
> enabled. Part of the negotiation when setting it up is getting the IOMMU
> number so I thought it has to have IOMMU.
>
Yes, issue looks like related to the IOMMU, and it may be either related
to HW support, or ESXi iommu driver support, we will check using below
information you provided.
> I tried disabling IOMMU and enabling enable_unsafe_noiommu flag but
> again, that didn't work.
> ESXI version - VMware ESXi, 7.0.0, 16324942
> AMD: AMD EPYC 7452 32-Core Processo
>
> On an Intel host which worked: Intel(R) Xeon(R) CPU E5-2697A v4 @ 2.60GHz
> Regarding the logs I will try and attach it soon.
>
Thanks for info, waiting for logs.
>
> On Fri, Jul 21, 2023 at 12:21 PM Ferruh Yigit <ferruh.yigit@amd.com
> <mailto:ferruh.yigit@amd.com>> wrote:
>
> Hi Igor,
>
> VM doesn't have IOMMU, and vmxnet3 requires PA mode, for this can you
> please try with:
> - enable 'enable_unsafe_noiommu_mode' flag
> - Force PA mode via '--iova-mode=pa' eal parameter
>
>
> Also to be able to figure out AMD IOMMU support level, can you please
> provide:
> - AMD part number
> - ESXi/hypervisor version
> - ESXi & VM kernel logs
>
>
> Thanks,
> Ferruh
>
> On 7/20/2023 5:21 PM, Jochen Behrens wrote:
> > +Ronak from the ESX team
> >
> >
> >
> >
> >
> > In our usage, we do set amd_iommu=off in the boot command line from
> > grub. (Or intel_iommu=off for Intel processors.)
> >
> >
> >
> > Jochen
> >
> >
> >
> > *From: *Thomas Monjalon <thomas@monjalon.net
> <mailto:thomas@monjalon.net>>
> > *Date: *Thursday, July 20, 2023 at 6:00 AM
> > *To: *Igor de Paula <igordptx@gmail.com <mailto:igordptx@gmail.com>>
> > *Cc: *users@dpdk.org <mailto:users@dpdk.org> <users@dpdk.org
> <mailto:users@dpdk.org>>, Jochen Behrens
> > <jbehrens@vmware.com <mailto:jbehrens@vmware.com>>, Nipun Gupta
> <nipun.gupta@amd.com <mailto:nipun.gupta@amd.com>>, Nikhil Agarwal
> > <nikhil.agarwal@amd.com <mailto:nikhil.agarwal@amd.com>>, Ferruh
> Yigit <ferruh.yigit@amd.com <mailto:ferruh.yigit@amd.com>>
> > *Subject: *Re: help
> >
> > !! External Email
> >
> > +Cc some AMD maintainers, they can have an idea about IOMMU settings.
> >
> >
> > 20/07/2023 14:44, Igor de Paula:
> >> I have enabled it in the host and in the BIOS for AMD...
> >> In the Bios I changed to amd_iommu=on and in the host it's the
> same for
> >> either.
> >>
> >> On Thu, Jul 20, 2023 at 1:31 PM Thomas Monjalon
> <thomas@monjalon.net <mailto:thomas@monjalon.net>> wrote:
> >>
> >> > 20/07/2023 11:35, Igor de Paula:
> >> > > The weird thing is that it only happens when I am using a
> host with an
> >> > AMD
> >> > > processor. It doesn't happen when I use a host with an Intel
> processor.
> >> >
> >> > So it's probably a matter of BIOS settings for the IOMMU?
> >> >
> >> >
> >> > > On Thu, Jul 20, 2023 at 10:32 AM Thomas Monjalon
> <thomas@monjalon.net <mailto:thomas@monjalon.net>>
> >> > > wrote:
> >> > >
> >> > > > +Cc the vmxnet3 maintainer.
> >> > > >
> >> > > > Please Jochen, do you have an idea what's wrong below?
> >> > > >
> >> > > >
> >> > > > 20/07/2023 11:25, Igor de Paula:
> >> > > > > This is because it can't negotiate the IOMMU type with
> any port.
> >> > > > >
> >> > > > > On Thu, Jul 20, 2023 at 5:08 AM Thomas Monjalon
> <thomas@monjalon.net <mailto:thomas@monjalon.net>
> >> > >
> >> > > > wrote:
> >> > > > >
> >> > > > > > Hello,
> >> > > > > >
> >> > > > > > The first error is "Cause: Error: number of ports must
> be even"
> >> > > > > >
> >> > > > > >
> >> > > > > > 03/05/2023 18:13, Igor de Paula:
> >> > > > > > > I am running a VM inside a VMWARE server (vSphere).
> >> > > > > > > My goal it to set up DPDK with two HW ports, and set up a
> >> > > > virtio_user to
> >> > > > > > > interact with the kernel stack.
> >> > > > > > > In another app I have it working but instead of
> virtio_user I am
> >> > > > running
> >> > > > > > > KNI, it works in IOVA-PA mode.
> >> > > > > > > I am looking to replace the KNI.
> >> > > > > > >
> >> > > > > > > When I try to set up virtio_user port as in the doc:
> >> > > > > > >
> >> > > > > >
> >> > > >
> >> >
> https://doc.dpdk.org/guides/howto/virtio_user_as_exception_path.html#virtio-user-as-exception-path <https://doc.dpdk.org/guides/howto/virtio_user_as_exception_path.html#virtio-user-as-exception-path>
<https://doc.dpdk.org/guides/howto/virtio_user_as_exception_path.html#virtio-user-as-exception-path <https://doc.dpdk.org/guides/howto/virtio_user_as_exception_path.html#virtio-user-as-exception-path>>
> >> > > > > > > I get a error it can't run in PA mode.
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > When I try to run as VA mode from a parameter, I get the
> >> > following
> >> > > > > > errors:
> >> > > > > > > EAL: lib.eal log level changed from info to debug
> >> > > > > > > EAL: Detected lcore 0 as core 0 on socket 0
> >> > > > > > > EAL: Detected lcore 1 as core 0 on socket 0
> >> > > > > > > EAL: Support maximum 128 logical core(s) by
> configuration.
> >> > > > > > > EAL: Detected 2 lcore(s)
> >> > > > > > > EAL: Detected 1 NUMA nodes
> >> > > > > > > EAL: Checking presence of .so 'librte_eal.so.21.3'
> >> > > > > > > EAL: Checking presence of .so 'librte_eal.so.21'
> >> > > > > > > EAL: Checking presence of .so 'librte_eal.so'
> >> > > > > > > EAL: Detected static linkage of DPDK
> >> > > > > > > EAL: Ask a virtual area of 0x7000 bytes
> >> > > > > > > EAL: Virtual area found at 0x100000000 (size = 0x7000)
> >> > > > > > > EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> >> > > > > > > EAL: DPAA Bus not present. Skipping.
> >> > > > > > > EAL: VFIO PCI modules not loaded
> >> > > > > > > EAL: Selected IOVA mode 'VA'
> >> > > > > > > EAL: Probing VFIO support...
> >> > > > > > > EAL: IOMMU type 1 (Type 1) is supported
> >> > > > > > > EAL: IOMMU type 7 (sPAPR) is not supported
> >> > > > > > > EAL: IOMMU type 8 (No-IOMMU) is supported
> >> > > > > > > EAL: VFIO support initialized
> >> > > > > > > EAL: Ask a virtual area of 0x5b000 bytes
> >> > > > > > > EAL: Virtual area found at 0x100007000 (size = 0x5b000)
> >> > > > > > > EAL: Setting up physically contiguous memory...
> >> > > > > > > EAL: Setting maximum number of open files to 1048576
> >> > > > > > > EAL: Detected memory type: socket_id:0
> hugepage_sz:1073741824
> >> > > > > > > EAL: Creating 2 segment lists: n_segs:128 socket_id:0
> >> > > > > > hugepage_sz:1073741824
> >> > > > > > > EAL: Ask a virtual area of 0x2000 bytes
> >> > > > > > > EAL: Virtual area found at 0x100062000 (size = 0x2000)
> >> > > > > > > EAL: Memseg list allocated at socket 0, page size
> 0x100000kB
> >> > > > > > > EAL: Ask a virtual area of 0x2000000000 bytes
> >> > > > > > > EAL: Virtual area found at 0x140000000 (size =
> 0x2000000000)
> >> > > > > > > EAL: VA reserved for memseg list at 0x140000000, size
> 2000000000
> >> > > > > > > EAL: Ask a virtual area of 0x2000 bytes
> >> > > > > > > EAL: Virtual area found at 0x2140000000 (size = 0x2000)
> >> > > > > > > EAL: Memseg list allocated at socket 0, page size
> 0x100000kB
> >> > > > > > > EAL: Ask a virtual area of 0x2000000000 bytes
> >> > > > > > > EAL: Virtual area found at 0x2180000000 (size =
> 0x2000000000)
> >> > > > > > > EAL: VA reserved for memseg list at 0x2180000000,
> size 2000000000
> >> > > > > > > EAL: TSC frequency is ~2350000 KHz
> >> > > > > > > EAL: Main lcore 0 is ready (tid=7f8ad790ec00;cpuset=[0])
> >> > > > > > > EAL: lcore 1 is ready (tid=7f8ad6907400;cpuset=[1])
> >> > > > > > > EAL: Trying to obtain current memory policy.
> >> > > > > > > EAL: Setting policy MPOL_PREFERRED for socket 0
> >> > > > > > > EAL: Restoring previous memory policy: 0
> >> > > > > > > EAL: request: mp_malloc_sync
> >> > > > > > > EAL: Heap on socket 0 was expanded by 1024MB
> >> > > > > > > EAL: PCI device 0000:0b:00.0 on NUMA socket -1
> >> > > > > > > EAL: probe driver: 15ad:7b0 net_vmxnet3
> >> > > > > > > EAL: Expecting 'PA' IOVA mode but current mode is
> 'VA', not
> >> > > > > > initializing
> >> > > > > > > EAL: Requested device 0000:0b:00.0 cannot be used
> >> > > > > > > EAL: PCI device 0000:13:00.0 on NUMA socket -1
> >> > > > > > > EAL: probe driver: 15ad:7b0 net_vmxnet3
> >> > > > > > > EAL: Expecting 'PA' IOVA mode but current mode is
> 'VA', not
> >> > > > > > initializing
> >> > > > > > > EAL: Requested device 0000:13:00.0 cannot be used
> >> > > > > > > EAL: Bus (pci) probe failed.
> >> > > > > > > EAL: lib.telemetry log level changed from disabled to
> warning
> >> > > > > > > EAL: Error - exiting with code: 1
> >> > > > > > > Cause: Error: number of ports must be even
> >> > > > > > > EAL: request: mp_malloc_sync
> >> > > > > > > EAL: Heap on socket 0 was shrunk by 1024MB
> >> > > > > > >
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > For some reason the HW ports won't setup. From what I
> understand
> >> > > > > > > net_vmxnet3 should work with VA mode.
> >> > > > > > > I enabled I/OMUU for the VM.
> >> > > > > > > The weird thing even when enabled, I still have the
> >> > > > > > > enable_unsafe_noiommu_mode flag on.
> >> > > > > > > And because it's on the this:
> >> > > > > > >
> >> > > > > > > dev_iova_mode = pci_device_iova_mode(dr, dev);
> >> > > > > > >
> >> > > > > > > return PA mode, and it fails.
> >> > > > > > >
> >> > > > > > > When I disable it by modifying
> >> > > > > > >
> /sys/module/vfio/parameters/enable_unsafe_noiommu_mode, I get
> >> > another
> >> > > > > > error.
> >> > > > > > > The error is that it doesn't find a suitable IOMMU type:
> >> > > > > > > Just putting the relevant message:
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > EAL: Heap on socket 0 was expanded by 1024MB
> >> > > > > > > EAL: PCI device 0000:0b:00.0 on NUMA socket -1
> >> > > > > > > EAL: probe driver: 15ad:7b0 net_vmxnet3
> >> > > > > > > EAL: Set IOMMU type 1 (Type 1) failed, error 19 (No
> such device)
> >> > > > > > > EAL: Set IOMMU type 7 (sPAPR) failed, error 19 (No
> such device)
> >> > > > > > > EAL: Set IOMMU type 8 (No-IOMMU) failed, error 19 (No
> such
> >> > device)
> >> > > > > > > EAL: 0000:0b:00.0 failed to select IOMMU type
> >> > > > > > > EAL: Requested device 0000:0b:00.0 cannot be used
> >> > > > > > > EAL: PCI device 0000:13:00.0 on NUMA socket -1
> >> > > > > > > EAL: probe driver: 15ad:7b0 net_vmxnet3
> >> > > > > > > EAL: Set IOMMU type 1 (Type 1) failed, error 19 (No
> such device)
> >> > > > > > > EAL: Set IOMMU type 7 (sPAPR) failed, error 19 (No
> such device)
> >> > > > > > > EAL: Set IOMMU type 8 (No-IOMMU) failed, error 19 (No
> such
> >> > device)
> >> > > > > > > EAL: 0000:13:00.0 failed to select IOMMU type
> >> > > > > > > EAL: Requested device 0000:13:00.0 cannot be used
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > I can see where it fails:
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > const struct vfio_iommu_type *
> >> > > > > > > vfio_set_iommu_type(int vfio_container_fd)
> >> > > > > > > {
> >> > > > > > > unsigned idx;
> >> > > > > > > for (idx = 0; idx < RTE_DIM(iommu_types); idx++) {
> >> > > > > > > const struct vfio_iommu_type *t = &iommu_types[idx];
> >> > > > > > >
> >> > > > > > > int ret = ioctl(vfio_container_fd, VFIO_SET_IOMMU,
> >> > > > > > > t->type_id);
> >> > > > > > > if (!ret) {
> >> > > > > > > RTE_LOG(INFO, EAL, "Using IOMMU type %d (%s)\n",
> >> > > > > > > t->type_id, t->name);
> >> > > > > > > return t;
> >> > > > > > > }
> >> > > > > > > /* not an error, there may be more supported IOMMU
> types */
> >> > > > > > > RTE_LOG(DEBUG, EAL, "Set IOMMU type %d (%s) failed,
> error "
> >> > > > > > > "%i (%s)\n", t->type_id, t->name, errno,
> >> > > > > > > strerror(errno));
> >> > > > > > > }
> >> > > > > > > /* if we didn't find a suitable IOMMU type, fail */
> >> > > > > > > return NULL;
> >> > > > > > > }
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > The ioctl returns -1.
> >> > > > > > >
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > I tried many things.
> >> > > > > > > Enabling/disabling IOMMU.
> >> > > > > > > Modifying the enable_unsafe_noiommu_mode flag.
> >> > > > > > > Running in PA mode.
> >> > > > > > > Any help will be much appreciated.
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >
> >
> >
> > !! External Email: This email originated from outside of the
> > organization. Do not click links or open attachments unless you
> > recognize the sender.
> >
>