Dear Jailhouse community,
Currently I am running into an issue enabling Jailhouse on a x86-based server
platform.
The error triggered is
FATAL: Unsupported MSI/MSI-X state, device xx:xx.x, cap 5
from hypervisor/pci.c, line 833.
This is traced back via
hypervisor/pci.c: pci_config_commit
hypervisor/arch/x86/pci.c: arch_pci_update_msi
hypervisor/arch/x86/vtd.c: iommu_map_interrupt
where the check irte.field.sid != device_id fails.
The device for which this fails is a PCI bridge. The check fails for
vector 8
sid 0x5F40
device_id 0x5E00
The device_id corresponds to the upstream switch port, the sid corresponds to
the downstream switch port. See the sysconfig snippet below.
The sysconfig discovers 8 msi_vectors for the upstream port, so this failing at
vector 8 makes quite some sense. However, the value of vectors in
arch_pci_update_msi is 128! I.e, tries to access up to 128 vector, which seems
much too high. This value comes from union pci_msi_registers. Could that be
misconfigured in the case of a bridge?
Does anybody have an idea what goes wrong here?
Is this on the Jailhouse side, or is the switch misconfigured?
PS, Removing the bridges fixes the error.
Thanks for the support!
Best regards, Bram Hooimeijer
/* PCIDevice: 5e:00.0: Upstream port*/
{
.type = JAILHOUSE_PCI_TYPE_BRIDGE,
.iommu = 6,
.domain = 0x0,
.bdf = 0x5e00,
.bar_mask = {
0xfffc0000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
},
.caps_start = 80,
.num_caps = 12,
.num_msi_vectors = 8,
.msi_64bits = 1,
.msi_maskable = 1,
.num_msix_vectors = 0,
.msix_region_size = 0x0,
.msix_address = 0x0,
},
/* PCIDevice: 5f:08.0 Downstream port*/
{
.type = JAILHOUSE_PCI_TYPE_BRIDGE,
.iommu = 6,
.domain = 0x0,
.bdf = 0x5f40,
.bar_mask = {
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
},
.caps_start = 92,
.num_caps = 12,
.num_msi_vectors = 8,
.msi_64bits = 1,
.msi_maskable = 1,
.num_msix_vectors = 0,
.msix_region_size = 0x0,
.msix_address = 0x0,
},
/* PCIDevice: 5f:10.0 Downstream port */
{
.type = JAILHOUSE_PCI_TYPE_BRIDGE,
.iommu = 6,
.domain = 0x0,
.bdf = 0x5f80,
.bar_mask = {
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
},
.caps_start = 92,
.num_caps = 12,
.num_msi_vectors = 8,
.msi_64bits = 1,
.msi_maskable = 1,
.num_msix_vectors = 0,
.msix_region_size = 0x0,
.msix_address = 0x0,
},
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