Am Sat, 5 Aug 2017 00:59:58 +0000
schrieb "Pontes, Otavio" <[email protected]>:
> Hi,
>
> I am using jailhouse in an Intel x86 hardware and I am having some
> problems to start ivshmem-net driver in a root cell, in order to
> communicate with a Linux inmate cell.
> I have successfully use this driver to stablish a communication
> between two Linux inmate cells, but the driver fails when I load it
> in the root cell.
> Can anyone help me in understanding this issue and debbuging the
> problem?
>
> In the root cell configuration file I have addeded the following:
>
> mem_regions:
> /* IVSHMEM shared memory region (networking) */
> {
> .phys_start = 0x3f100000,
> .virt_start = 0x3f100000,
> .size = 0xff000,
> .flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
> JAILHOUSE_MEM_ROOTSHARED,
> },
>
> pci_devices:
> /* IVSHMEM (networking) */
> {
> .type = JAILHOUSE_PCI_TYPE_IVSHMEM,
> .domain = 0x0000,
> .bdf = 0x0f << 3, //This doesn't conflict with other bdf
> .bar_mask = {
> 0xffffff00, 0xffffffff, 0x00000000,
> 0x00000000, 0xffffffe0, 0xffffffff,
> },
> .num_msix_vectors = 1,
> .shmem_region = 0, //This is pointing to the mem_region above
> .shmem_protocol = JAILHOUSE_SHMEM_PROTO_VETH,
> },
If your machine has multiple iommu_units try .iommu = 1 and higher in
the above struct.
> And when I run:
> $ ./tools/jailhouse enable configs/root.cell
>
> The driver ivshmem-net is loaded and the following message is printed
> in the kernel log
> [ 20.956367] ivshmem-net 0000:00:0f.0: invalid IVPosition -1
Please also provide the hypervisor output. Either from serial or from
"jailhouse console".
Henning
> I noticed when I was debbuging this issue that the function
> ivshmem_register_mmio is not called when ivshmem-net driver tries to
> get the ivpos value. I suspected then that value of bar0_address and
> bar4_address may be wrong. Is there an way to know what would be the
> expected value for this addresses? Or is there any other thing I
> should check to try to debug this?
>
> Best regards,
> Otavio
>
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