Re: [PATCH v2] iommu/arm-smmu: Break insecure users by disabling bypass by default

From: Tim Harvey
Date: Fri Oct 04 2019 - 13:13:39 EST

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On Fri, Oct 4, 2019 at 9:36 AM Robin Murphy <robin.murphy@xxxxxxx> wrote:
>
> On 04/10/2019 16:23, Tim Harvey wrote:
> > On Thu, Oct 3, 2019 at 3:24 PM Robin Murphy <robin.murphy@xxxxxxx> wrote:
> >>
> >> On 2019-10-03 9:51 pm, Tim Harvey wrote:
> >>> On Thu, Oct 3, 2019 at 1:42 PM Robin Murphy <robin.murphy@xxxxxxx> wrote:
> >>>>
> >>>> Hi Tim,
> >>>>
> >>>> On 2019-10-03 7:27 pm, Tim Harvey wrote:
> >>>>> On Fri, Mar 1, 2019 at 11:21 AM Douglas Anderson <dianders@xxxxxxxxxxxx> wrote:
> >>>>>>
> >>>>>> If you're bisecting why your peripherals stopped working, it's
> >>>>>> probably this CL. Specifically if you see this in your dmesg:
> >>>>>> Unexpected global fault, this could be serious
> >>>>>> ...then it's almost certainly this CL.
> >>>>>>
> >>>>>> Running your IOMMU-enabled peripherals with the IOMMU in bypass mode
> >>>>>> is insecure and effectively disables the protection they provide.
> >>>>>> There are few reasons to allow unmatched stream bypass, and even fewer
> >>>>>> good ones.
> >>>>>>
> >>>>>> This patch starts the transition over to make it much harder to run
> >>>>>> your system insecurely. Expected steps:
> >>>>>>
> >>>>>> 1. By default disable bypass (so anyone insecure will notice) but make
> >>>>>> it easy for someone to re-enable bypass with just a KConfig change.
> >>>>>> That's this patch.
> >>>>>>
> >>>>>> 2. After people have had a little time to come to grips with the fact
> >>>>>> that they need to set their IOMMUs properly and have had time to
> >>>>>> dig into how to do this, the KConfig will be eliminated and bypass
> >>>>>> will simply be disabled. Folks who are truly upset and still
> >>>>>> haven't fixed their system can either figure out how to add
> >>>>>> 'arm-smmu.disable_bypass=n' to their command line or revert the
> >>>>>> patch in their own private kernel. Of course these folks will be
> >>>>>> less secure.
> >>>>>>
> >>>>>> Suggested-by: Robin Murphy <robin.murphy@xxxxxxx>
> >>>>>> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> >>>>>> ---
> >>>>>
> >>>>> Hi Doug / Robin,
> >>>>>
> >>>>> I ran into this breaking things on OcteonTx boards based on CN80XX
> >>>>> CPU. The IOMMU configuration is a bit beyond me and I'm hoping you can
> >>>>> offer some advice. The IOMMU here is cavium,smmu-v2 as defined in
> >>>>> https://github.com/Gateworks/dts-newport/blob/master/cn81xx-linux.dtsi
> >>>>>
> >>>>> Booting with 'arm-smmu.disable_bypass=n' does indeed work around the
> >>>>> breakage as the commit suggests.
> >>>>>
> >>>>> Any suggestions for a proper fix?
> >>>>
> >>>> Ah, you're using the old "mmu-masters" binding (and in a way which isn't
> >>>> well-defined - it's never been specified what the stream ID argument(s)
> >>>> would mean for a PCI host bridge, and Linux just ignores them). The
> >>>> ideal thing would be to update the DT to generic "iommu-map" properties
> >>>> - it's been a long time since I last played with a ThunderX, but I
> >>>> believe the SMMU stream IDs should just be the same as the ITS device
> >>>> IDs (which is how the "mmu-masters" mapping would have played out anyway).
> >>>>
> >>>> The arm-smmu driver support for the old binding has always relied on
> >>>> implicit bypass - there are technical reasons why we can't realistically
> >>>> support the full functionality offered to the generic bindings, but it
> >>>> would be possible to add some degree of workaround to prevent it
> >>>> interacting quite so poorly with disable_bypass, if necessary. Do you
> >>>> have deployed systems with DTs that can't be updated, but still might
> >>>> need to run new kernels?
> >>>>
> >>>
> >>> Robin,
> >>>
> >>> Thanks for the response. I don't care too much about supporting new
> >>> kernels with the current DT - I'm good with fixing this with a DT
> >>> change. Would you be able to give me an example? I would love to see
> >>> Cavium mainline an cn81xx dts/dtsi in arch/arm64/boot/dts to be used
> >>> as a base as the only thing we have to go off of currently is the
> >>> Cavium SDK which has fairly old kernel support.
> >>
> >> No promises (it's a late-night hack from my sofa), but try giving this a
> >> go...
> >>
> >> Robin.
> >>
> >> ----->8-----
> >> diff --git a/cn81xx-linux.dtsi b/cn81xx-linux.dtsi
> >> index 3b759d9575fe..dabc9047c674 100644
> >> --- a/cn81xx-linux.dtsi
> >> +++ b/cn81xx-linux.dtsi
> >> @@ -234,7 +234,7 @@
> >> clocks = <&sclk>;
> >> };
> >>
> >> - smmu0@830000000000 {
> >> + smmu: smmu0@830000000000 {
> >> compatible = "cavium,smmu-v2";
> >> reg = <0x8300 0x0 0x0 0x2000000>;
> >> #global-interrupts = <1>;
> >> @@ -249,23 +249,18 @@
> >> <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>,
> >> <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>,
> >> <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>, <0 69 4>;
> >> -
> >> - mmu-masters = <&ecam0 0x100>,
> >> - <&pem0 0x200>,
> >> - <&pem1 0x300>,
> >> - <&pem2 0x400>;
> >> -
> >> + #iommu-cells = <1>;
> >> + dma-coherent;
> >> };
> >>
> >> ecam0: pci@848000000000 {
> >> compatible = "pci-host-ecam-generic";
> >> device_type = "pci";
> >> - msi-parent = <&its>;
> >> msi-map = <0 &its 0 0x10000>;
> >> + iommu-map = <0 &smmu 0 0x10000>;
> >> bus-range = <0 31>;
> >> #size-cells = <2>;
> >> #address-cells = <3>;
> >> - #stream-id-cells = <1>;
> >> u-boot,dm-pre-reloc;
> >> dma-coherent;
> >> reg = <0x8480 0x00000000 0 0x02000000>; /* Configuration space */
> >> @@ -399,12 +394,11 @@
> >>
> >> compatible = "cavium,pci-host-thunder-pem";
> >> device_type = "pci";
> >> - msi-parent = <&its>;
> >> msi-map = <0 &its 0 0x10000>;
> >> + iommu-map = <0 &smmu 0 0x10000>;
> >> bus-range = <0x1f 0x57>;
> >> #size-cells = <2>;
> >> #address-cells = <3>;
> >> - #stream-id-cells = <1>;
> >> dma-coherent;
> >> reg = <0x8800 0x1f000000 0x0 0x39000000>, /* Configuration space */
> >> <0x87e0 0xc0000000 0x0 0x01000000>; /* PEM space */
> >> @@ -424,12 +418,11 @@
> >> pem1: pci@87e0c1000000 {
> >> compatible = "cavium,pci-host-thunder-pem";
> >> device_type = "pci";
> >> - msi-parent = <&its>;
> >> msi-map = <0 &its 0 0x10000>;
> >> + iommu-map = <0 &smmu 0 0x10000>;
> >> bus-range = <0x57 0x8f>;
> >> #size-cells = <2>;
> >> #address-cells = <3>;
> >> - #stream-id-cells = <1>;
> >> dma-coherent;
> >> reg = <0x8840 0x57000000 0x0 0x39000000>, /* Configuration space */
> >> <0x87e0 0xc1000000 0x0 0x01000000>; /* PEM space */
> >> @@ -449,12 +442,11 @@
> >> pem2: pci@87e0c2000000 {
> >> compatible = "cavium,pci-host-thunder-pem";
> >> device_type = "pci";
> >> - msi-parent = <&its>;
> >> msi-map = <0 &its 0 0x10000>;
> >> + iommu-map = <0 &smmu 0 0x10000>;
> >> bus-range = <0x8f 0xc7>;
> >> #size-cells = <2>;
> >> #address-cells = <3>;
> >> - #stream-id-cells = <1>;
> >> dma-coherent;
> >> reg = <0x8880 0x8f000000 0x0 0x39000000>, /* Configuration space */
> >> <0x87e0 0xc2000000 0x0 0x01000000>; /* PEM space */
> >
> > Robin,
> >
> > No difference... still need 'arm-smmu.disable_bypass=n' to boot. Are
> > all four iommu-map props above supposed to be the same? Seems to me
> > they all point to the same thing which looks wrong.
>
> Hmm... :/
>
> Those mappings just set Stream ID == PCI RID (strictly each one should
> only need to cover the bus range assigned to that bridge, but it's not
> crucial) which is the same thing the driver assumes for the mmu-masters
> property, so either that's wrong and never could have worked anyway -
> have you tried VFIO on this platform? - or there are other devices also
> mastering through the SMMU that aren't described at all. Are you able to
> capture a boot log? The SMMU faults do encode information about the
> offending ID, and you can typically correlate their appearance
> reasonably well with endpoint drivers probing.
>

Robin,

VFIO is enabled in the kernel but I don't know anything about how to
test/use it:
$ grep VFIO .config
CONFIG_KVM_VFIO=y
CONFIG_VFIO_IOMMU_TYPE1=y
CONFIG_VFIO_VIRQFD=y
CONFIG_VFIO=y
# CONFIG_VFIO_NOIOMMU is not set
CONFIG_VFIO_PCI=y
CONFIG_VFIO_PCI_MMAP=y
CONFIG_VFIO_PCI_INTX=y
# CONFIG_VFIO_PLATFORM is not set
# CONFIG_VFIO_MDEV is not set

I do have a boot console yet I'm not seeing any smmu faults at all.
Perhaps I've mis-diagnosed the issue completely. To be clear when I
boot with arm-smmu.disable_bypass=y the serial console appears to not
accept input in userspace and with arm-smmu.disable_bypass=n I'm fine.
I'm using a buildroot initramfs rootfs for simplicity. The system
isn't hung as I originally expected as the LED heartbeat trigger
continues blinking... I just can't get console to accept input.

Here's my kernel log:
[ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x430f0a22]
[ 0.000000] Linux version 5.3.0 (tharvey@tharvey) (gcc version
6.2.0 (Cavium Inc. Version 2.1 build 97)) #389 SMP PREEMPT Fri Oct 4
10:02:29 PDT 2019
[ 0.000000] Machine model: Gateworks Newport CN80XX GW6300
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: UEFI not found.
[ 0.000000] cma: Reserved 64 MiB at 0x000000003b000000
[ 0.000000] NUMA: NODE_DATA [mem 0x3adf1840-0x3adf2fff]
[ 0.000000] Zone ranges:
[ 0.000000] DMA32 [mem 0x0000000000500000-0x000000003effffff]
[ 0.000000] Normal empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000500000-0x000000003effffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000500000-0x000000003effffff]
[ 0.000000] On node 0 totalpages: 256768
[ 0.000000] DMA32 zone: 4012 pages used for memmap
[ 0.000000] DMA32 zone: 0 pages reserved
[ 0.000000] DMA32 zone: 256768 pages, LIFO batch:63
[ 0.000000] psci: probing for conduit method from DT.
[ 0.000000] psci: PSCIv1.0 detected in firmware.
[ 0.000000] psci: Using standard PSCI v0.2 function IDs
[ 0.000000] psci: Trusted OS resident on physical CPU 0x0
[ 0.000000] psci: SMC Calling Convention v1.0
[ 0.000000] percpu: Embedded 23 pages/cpu s56728 r8192 d29288 u94208
[ 0.000000] pcpu-alloc: s56728 r8192 d29288 u94208 alloc=23*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1
[ 0.000000] Detected VIPT I-cache on CPU0
[ 0.000000] CPU features: detected: GIC system register CPU interface
[ 0.000000] CPU features: detected: Cavium erratum 30115
[ 0.000000] CPU features: detected: Kernel page table isolation (KPTI)
[ 0.000000] ARM_SMCCC_ARCH_WORKAROUND_1 missing from firmware
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 252756
[ 0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: cma=64M coherent_pool=16M
net.ifnames=0 arm-smmu.disable_bypass=y debug
[ 0.000000] Dentry cache hash table entries: 131072 (order: 8,
1048576 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288
bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 911208K/1027072K available (11772K kernel code,
1792K rwdata, 6032K rodata, 9920K init, 450K bss, 50328K reserved,
65536K cma-reserved)
[ 0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[ 0.000000] rcu: Preemptible hierarchical RCU implementation.
[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=2.
[ 0.000000] Tasks RCU enabled.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay
is 25 jiffies.
[ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
[ 0.000000] GICv3: GIC: Using split EOI/Deactivate mode
[ 0.000000] GICv3: Distributor has no Range Selector support
[ 0.000000] GICv3: no VLPI support, direct LPI support
[ 0.000000] GICv3: CPU0: found redistributor 0 region 0:0x0000801080000000
[ 0.000000] ITS [mem 0x801000020000-0x80100021ffff]
[ 0.000000] ITS@0x0000801000020000: Devices Table too large, reduce
ids 21->19
[ 0.000000] ITS@0x0000801000020000: allocated 524288 Devices
@39000000 (flat, esz 8, psz 64K, shr 1)
[ 0.000000] GICv3: using LPI property table @0x0000000000530000
[ 0.000000] GICv3: CPU0: using allocated LPI pending table
@0x0000000000540000
[ 0.000000] random: get_random_bytes called from
start_kernel+0x300/0x4a0 with crng_init=0
[ 0.000000] arch_timer: cp15 timer(s) running at 100.00MHz (phys).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff
max_cycles: 0x171024e7e0, max_idle_ns: 440795205315 ns
[ 0.000005] sched_clock: 56 bits at 100MHz, resolution 10ns, wraps
every 4398046511100ns
[ 0.000477] Console: colour dummy device 80x25
[ 0.001361] printk: console [tty0] enabled
[ 0.001459] Calibrating delay loop (skipped), value calculated
using timer frequency.. 200.00 BogoMIPS (lpj=400000)
[ 0.001496] pid_max: default: 32768 minimum: 301
[ 0.001611] LSM: Security Framework initializing
[ 0.001687] Mount-cache hash table entries: 2048 (order: 2, 16384
bytes, linear)
[ 0.001718] Mountpoint-cache hash table entries: 2048 (order: 2,
16384 bytes, linear)
[ 0.024071] ASID allocator initialised with 32768 entries
[ 0.032063] rcu: Hierarchical SRCU implementation.
[ 0.040139] Platform MSI: gic-its@801000020000 domain created
[ 0.040236] PCI/MSI:
/interrupt-controller@801000000000/gic-its@801000020000 domain created
[ 0.041180] EFI services will not be available.
[ 0.048110] smp: Bringing up secondary CPUs ...
[ 0.081524] Detected VIPT I-cache on CPU1
[ 0.081548] GICv3: CPU1: found redistributor 1 region 0:0x0000801080020000
[ 0.081562] GICv3: CPU1: using allocated LPI pending table
@0x0000000000550000
[ 0.081599] CPU1: Booted secondary processor 0x0000000001 [0x430f0a22]
[ 0.081746] smp: Brought up 1 node, 2 CPUs
[ 0.081833] SMP: Total of 2 processors activated.
[ 0.081856] CPU features: detected: Data cache clean to the PoU not
required for I/D coherence
[ 0.081882] CPU features: detected: CRC32 instructions
[ 0.100883] CPU: All CPU(s) started at EL2
[ 0.100948] alternatives: patching kernel code
[ 0.102458] devtmpfs: initialized
[ 0.106577] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.106625] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
[ 0.109108] pinctrl core: initialized pinctrl subsystem
[ 0.110372] DMI not present or invalid.
[ 0.110839] NET: Registered protocol family 16
[ 0.111292] audit: initializing netlink subsys (disabled)
[ 0.111501] audit: type=2000 audit(0.092:1): state=initialized
audit_enabled=0 res=1
[ 0.112711] cpuidle: using governor menu
[ 0.113050] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[ 0.118415] DMA: preallocated 16384 KiB pool for atomic allocations
[ 0.119754] Serial: AMBA PL011 UART driver
[ 0.122242] 87e028000000.serial: ttyAMA0 at MMIO 0x87e028000000
(irq = 7, base_baud = 0) is a PL011 rev3
[ 0.682802] printk: console [ttyAMA0] enabled
[ 0.687966] 87e029000000.serial: ttyAMA1 at MMIO 0x87e029000000
(irq = 8, base_baud = 0) is a PL011 rev3
[ 0.698195] 87e02a000000.serial: ttyAMA2 at MMIO 0x87e02a000000
(irq = 9, base_baud = 0) is a PL011 rev3
[ 0.708412] 87e02b000000.serial: ttyAMA3 at MMIO 0x87e02b000000
(irq = 10, base_baud = 0) is a PL011 rev3
[ 0.735587] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[ 0.742336] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages
[ 0.749066] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[ 0.755790] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages
[ 0.765490] cryptd: max_cpu_qlen set to 1000
[ 0.775075] ACPI: Interpreter disabled.
[ 0.780532] vgaarb: loaded
[ 0.783884] SCSI subsystem initialized
[ 0.787855] libata version 3.00 loaded.
[ 0.792032] usbcore: registered new interface driver usbfs
[ 0.797607] usbcore: registered new interface driver hub
[ 0.803015] usbcore: registered new device driver usb
[ 0.808652] pps_core: LinuxPPS API ver. 1 registered
[ 0.813669] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
Rodolfo Giometti <giometti@xxxxxxxx>
[ 0.822846] PTP clock support registered
[ 0.826901] EDAC MC: Ver: 3.0.0
[ 0.831097] FPGA manager framework
[ 0.834610] Advanced Linux Sound Architecture Driver Initialized.
[ 0.841585] clocksource: Switched to clocksource arch_sys_counter
[ 0.847926] VFS: Disk quotas dquot_6.6.0
[ 0.851952] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.859086] pnp: PnP ACPI: disabled
[ 0.871006] thermal_sys: Registered thermal governor 'step_wise'
[ 0.871011] thermal_sys: Registered thermal governor 'power_allocator'
[ 0.877274] NET: Registered protocol family 2
[ 0.888632] tcp_listen_portaddr_hash hash table entries: 512
(order: 1, 8192 bytes, linear)
[ 0.897065] TCP established hash table entries: 8192 (order: 4,
65536 bytes, linear)
[ 0.904943] TCP bind hash table entries: 8192 (order: 5, 131072
bytes, linear)
[ 0.912315] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.918773] UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 0.925449] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 0.932681] NET: Registered protocol family 1
[ 0.937649] RPC: Registered named UNIX socket transport module.
[ 0.943612] RPC: Registered udp transport module.
[ 0.948338] RPC: Registered tcp transport module.
[ 0.953057] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.959522] PCI: CLS 0 bytes, default 64
[ 3.473305] hw perfevents: enabled with armv8_cavium_thunder PMU
driver, 7 counters available
[ 3.482035] kvm [1]: IPA Size Limit: 48bits
[ 3.487560] kvm [1]: GICv3: no GICV resource entry
[ 3.492383] kvm [1]: disabling GICv2 emulation
[ 3.496845] kvm [1]: GICv3 sysreg trapping enabled ([G0G1], reduced
performance)
[ 3.504284] kvm [1]: GIC system register CPU interface enabled
[ 3.510202] kvm [1]: vgic interrupt IRQ1
[ 3.514276] kvm [1]: Hyp mode initialized successfully
[ 3.575927] Initialise system trusted keyrings
[ 3.580620] workingset: timestamp_bits=44 max_order=18 bucket_order=0
[ 3.597305] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 3.604222] NFS: Registering the id_resolver key type
[ 3.609341] Key type id_resolver registered
[ 3.613562] Key type id_legacy registered
[ 3.617602] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 3.624518] 9p: Installing v9fs 9p2000 file system support
[ 3.652630] Key type asymmetric registered
[ 3.656770] Asymmetric key parser 'x509' registered
[ 3.661715] Block layer SCSI generic (bsg) driver version 0.4
loaded (major 245)
[ 3.669137] io scheduler mq-deadline registered
[ 3.673682] io scheduler kyber registered
[ 3.685223] pci-host-generic 848000000000.pci: host bridge
/soc@0/pci@848000000000 ranges:
[ 3.693573] pci-host-generic 848000000000.pci: MEM
0x801000000000..0x808fffffffff -> 0x801000000000
[ 3.702910] pci-host-generic 848000000000.pci: MEM
0x810000000000..0x817fffffffff -> 0x810000000000
[ 3.712195] pci-host-generic 848000000000.pci: MEM
0x868000000000..0x87e027ffffff -> 0x868000000000
[ 3.721469] pci-host-generic 848000000000.pci: MEM
0x87e02c000000..0x87e0bfffffff -> 0x87e02c000000
[ 3.730745] pci-host-generic 848000000000.pci: MEM
0x840000000000..0x840fffffffff -> 0x840000000000
[ 3.740021] pci-host-generic 848000000000.pci: MEM
0x843000000000..0x8431ffffffff -> 0x843000000000
[ 3.749284] pci-host-generic 848000000000.pci: MEM
0x87e0c6000000..0x87ffffffffff -> 0x87e0c6000000
[ 3.758618] pci-host-generic 848000000000.pci: ECAM at [mem
0x848000000000-0x848001ffffff] for [bus 00-1f]
[ 3.768473] pci-host-generic 848000000000.pci: PCI host bridge to bus 0000:00
[ 3.775644] pci_bus 0000:00: root bus resource [bus 00-1f]
[ 3.781154] pci_bus 0000:00: root bus resource [mem
0x801000000000-0x808fffffffff]
[ 3.788750] pci_bus 0000:00: root bus resource [mem
0x810000000000-0x817fffffffff]
[ 3.796345] pci_bus 0000:00: root bus resource [mem
0x868000000000-0x87e027ffffff]
[ 3.803943] pci_bus 0000:00: root bus resource [mem
0x87e02c000000-0x87e0bfffffff]
[ 3.811551] pci_bus 0000:00: root bus resource [mem
0x840000000000-0x840fffffffff]
[ 3.819148] pci_bus 0000:00: root bus resource [mem
0x843000000000-0x8431ffffffff]
[ 3.826741] pci_bus 0000:00: root bus resource [mem
0x87e0c6000000-0x87ffffffffff]
[ 3.834416] pci 0000:00:01.0: [177d:a002] type 01 class 0x060400
[ 3.840942] pci 0000:00:06.0: [177d:a00a] type 00 class 0x088000
[ 3.847043] pci 0000:00:06.0: BAR 0: [mem
0x803000000000-0x8030007fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.858035] pci 0000:00:06.0: BAR 4: [mem
0x803000f00000-0x803000ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.869284] pci 0000:00:07.0: [177d:a00b] type 00 class 0x088000
[ 3.875378] pci 0000:00:07.0: BAR 0: [mem
0x804000000000-0x8040007fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.886372] pci 0000:00:07.0: BAR 4: [mem
0x804000f00000-0x804000ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.897682] pci 0000:00:08.0: [177d:a00c] type 00 class 0x088000
[ 3.903786] pci 0000:00:08.0: BAR 0: [mem
0x807000000000-0x8070000fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.914790] pci 0000:00:08.0: BAR 4: [mem
0x807000f00000-0x807000ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.926039] pci 0000:00:09.0: [177d:a002] type 01 class 0x060400
[ 3.932382] pci 0000:00:0a.0: [177d:a002] type 01 class 0x060400
[ 3.938716] pci 0000:00:0b.0: [177d:a04f] type 00 class 0x058000
[ 3.944810] pci 0000:00:0b.0: BAR 0: [mem
0x808000000000-0x8080000fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.955806] pci 0000:00:0b.0: BAR 4: [mem
0x808000f00000-0x808000ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.967066] pci 0000:00:0c.0: [177d:a002] type 01 class 0x060400
[ 3.973407] pci 0000:00:0d.0: [177d:a04e] type 00 class 0x0c8000
[ 3.979505] pci 0000:00:0d.0: BAR 0: [mem
0x806000000000-0x8060007fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 3.990497] pci 0000:00:0d.0: BAR 4: [mem
0x806000f00000-0x806000ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.001772] pci 0000:00:0e.0: [177d:a015] type 00 class 0x088000
[ 4.007869] pci 0000:00:0e.0: BAR 0: [mem
0x874000000000-0x874001ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.018863] pci 0000:00:0e.0: BAR 4: [mem
0x874010000000-0x8740100fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.030105] pci 0000:00:0f.0: [177d:a002] type 01 class 0x060400
[ 4.036460] pci 0000:00:10.0: [177d:a055] type 00 class 0x0c0330
[ 4.042560] pci 0000:00:10.0: BAR 0: [mem
0x868000000000-0x8680001fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.053554] pci 0000:00:10.0: BAR 4: [mem
0x868000200000-0x8680002fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.064800] pci 0000:00:11.0: [177d:a055] type 00 class 0x0c0330
[ 4.070900] pci 0000:00:11.0: BAR 0: [mem
0x869000000000-0x8690001fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.081895] pci 0000:00:11.0: BAR 4: [mem
0x869000200000-0x8690002fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.093827] pci 0000:01:00.0: [177d:a001] type 00 class 0x088000
[ 4.099927] pci 0000:01:00.0: BAR 0: [mem
0x87e0fc000000-0x87e0fc0fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.110924] pci 0000:01:00.0: BAR 4: [mem
0x87e0fcf00000-0x87e0fcffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.122149] pci 0000:01:00.1: [177d:a00e] type 00 class 0x088000
[ 4.128249] pci 0000:01:00.1: BAR 0: [mem
0x87e006000000-0x87e0067fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.139243] pci 0000:01:00.1: BAR 4: [mem
0x87e006f00000-0x87e006ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.150448] pci 0000:01:01.3: [177d:a02b] type 00 class 0x0c8000
[ 4.156545] pci 0000:01:01.3: BAR 0: [mem
0x87e005000000-0x87e0057fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.167762] pci 0000:01:01.4: [177d:a010] type 00 class 0x058000
[ 4.173859] pci 0000:01:01.4: BAR 0: [mem
0x87e009000000-0x87e0097fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.184853] pci 0000:01:01.4: BAR 4: [mem
0x87e009f00000-0x87e009ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.196080] pci 0000:01:01.7: [177d:a035] type 00 class 0x088000
[ 4.202177] pci 0000:01:01.7: BAR 0: [mem
0x87e001000000-0x87e0017fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.213170] pci 0000:01:01.7: BAR 2: [mem
0x800000000000-0x8000ffffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.224168] pci 0000:01:01.7: BAR 4: [mem
0x87e001f00000-0x87e001ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.235389] pci 0000:01:02.0: [177d:a056] type 00 class 0x088000
[ 4.241490] pci 0000:01:02.0: BAR 0: [mem
0x87e0db000000-0x87e0db0fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.252484] pci 0000:01:02.0: BAR 4: [mem
0x87e0dbf00000-0x87e0dbffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.263704] pci 0000:01:06.0: [177d:a02e] type 00 class 0x058000
[ 4.269801] pci 0000:01:06.0: BAR 0: [mem
0x87e050000000-0x87e0507fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.280795] pci 0000:01:06.0: BAR 4: [mem
0x87e050f00000-0x87e050ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.292017] pci 0000:01:07.0: [177d:a02f] type 00 class 0x058000
[ 4.298116] pci 0000:01:07.0: BAR 0: [mem
0x87e058000000-0x87e0587fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.309110] pci 0000:01:07.0: BAR 4: [mem
0x87e058f00000-0x87e058ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.320327] pci 0000:01:07.4: [177d:a030] type 00 class 0x058000
[ 4.326424] pci 0000:01:07.4: BAR 0: [mem
0x87e05c000000-0x87e05c7fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.337417] pci 0000:01:07.4: BAR 4: [mem
0x87e05cf00000-0x87e05cffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.348621] pci 0000:01:09.0: [177d:a012] type 00 class 0x0c8000
[ 4.354725] pci 0000:01:09.0: BAR 0: [mem
0x87e0d0000000-0x87e0d07fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.365721] pci 0000:01:09.0: BAR 4: [mem
0x87e0d0f00000-0x87e0d0ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.376971] pci 0000:01:09.1: [177d:a012] type 00 class 0x0c8000
[ 4.383069] pci 0000:01:09.1: BAR 0: [mem
0x87e0d1000000-0x87e0d17fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.394063] pci 0000:01:09.1: BAR 4: [mem
0x87e0d1f00000-0x87e0d1ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.405291] pci 0000:01:0a.0: [177d:a022] type 00 class 0x058000
[ 4.411389] pci 0000:01:0a.0: BAR 0: [mem
0x87e088000000-0x87e0887fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.422384] pci 0000:01:0a.0: BAR 4: [mem
0x87e088f00000-0x87e088ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.433625] pci 0000:01:0c.0: [177d:a023] type 00 class 0x088000
[ 4.439718] pci 0000:01:0c.0: BAR 0: [mem
0x87e0a8000000-0x87e0a87fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.450713] pci 0000:01:0c.0: BAR 4: [mem
0x87e0a8f00000-0x87e0a8ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.461937] pci 0000:01:0c.1: [177d:a023] type 00 class 0x088000
[ 4.468035] pci 0000:01:0c.1: BAR 0: [mem
0x87e0a9000000-0x87e0a97fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.479030] pci 0000:01:0c.1: BAR 4: [mem
0x87e0a9f00000-0x87e0a9ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.490252] pci 0000:01:10.0: [177d:a026] type 00 class 0x028000
[ 4.496349] pci 0000:01:10.0: BAR 0: [mem
0x87e0e0000000-0x87e0e03fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.507343] pci 0000:01:10.0: BAR 4: [mem
0x87e0e0400000-0x87e0e07fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.518577] pci 0000:01:12.0: [177d:a054] type 00 class 0x028000
[ 4.524676] pci 0000:01:12.0: BAR 0: [mem
0x87e0e8000000-0x87e0e83fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.535671] pci 0000:01:12.0: BAR 4: [mem
0x87e0e8400000-0x87e0e87fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.547998] pci_bus 0000:01: busn_res: [bus 01-1f] end is updated to 01
[ 4.554772] pci 0000:02:00.0: [177d:a018] type 00 class 0x120000
[ 4.560871] pci 0000:02:00.0: BAR 0: [mem
0x87e040000000-0x87e0400fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 4.571866] pci 0000:02:00.0: VF BAR 0: [mem
0x840000800000-0x8400008fffff 64bit] (from Enhanced Allocation,
properties 0x4)
[ 5.589648] pci 0000:02:00.0: VF(n) BAR0 space: [mem
0x840000800000-0x8400008fffff 64bit] (contains BAR0 for 1 VFs)
[ 5.601442] pci_bus 0000:02: busn_res: [bus 02-1f] end is updated to 02
[ 5.608217] pci 0000:03:00.0: [177d:a043] type 00 class 0x058000
[ 5.614315] pci 0000:03:00.0: BAR 0: [mem
0x871000000000-0x8710000fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 5.625310] pci 0000:03:00.0: BAR 4: [mem
0x871000f00000-0x871000ffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 5.636300] pci 0000:03:00.0: VF BAR 0: [mem
0x871001000000-0x8710010fffff 64bit] (from Enhanced Allocation,
properties 0x4)
[ 6.677613] pci 0000:03:00.0: VF(n) BAR0 space: [mem
0x871001000000-0x8710010fffff 64bit] (contains BAR0 for 1 VFs)
[ 6.689409] pci_bus 0000:03: busn_res: [bus 03-1f] end is updated to 03
[ 6.696185] pci 0000:04:00.0: [177d:a040] type 00 class 0x108000
[ 6.702285] pci 0000:04:00.0: BAR 0: [mem
0x872000000000-0x87200fffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 6.713280] pci 0000:04:00.0: BAR 4: [mem
0x872010000000-0x8720100fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 6.724270] pci 0000:04:00.0: VF BAR 0: [mem
0x872020000000-0x8720200fffff 64bit] (from Enhanced Allocation,
properties 0x4)
[ 6.735522] pci 0000:04:00.0: VF BAR 4: [mem
0x872030000000-0x8720300fffff 64bit] (from Enhanced Allocation,
properties 0x4)
[ 7.765639] pci 0000:04:00.0: VF(n) BAR0 space: [mem
0x872020000000-0x872020ffffff 64bit] (contains BAR0 for 16 VFs)
[ 7.776212] pci 0000:04:00.0: VF(n) BAR4 space: [mem
0x872030000000-0x872030ffffff 64bit] (contains BAR4 for 16 VFs)
[ 7.788095] pci_bus 0000:04: busn_res: [bus 04-1f] end is updated to 04
[ 7.794871] pci 0000:05:00.0: [177d:a01e] type 00 class 0x020000
[ 7.800971] pci 0000:05:00.0: BAR 0: [mem
0x843000000000-0x84303fffffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 7.811966] pci 0000:05:00.0: BAR 4: [mem
0x843060000000-0x8430600fffff 64bit] (from Enhanced Allocation,
properties 0x0)
[ 7.822957] pci 0000:05:00.0: VF BAR 0: [mem
0x8430a0000000-0x8430a01fffff 64bit] (from Enhanced Allocation,
properties 0x4)
[ 7.834208] pci 0000:05:00.0: VF BAR 4: [mem
0x8430e0000000-0x8430e01fffff 64bit] (from Enhanced Allocation,
properties 0x4)
[ 8.853611] pci 0000:05:00.0: VF(n) BAR0 space: [mem
0x8430a0000000-0x8430a0ffffff 64bit] (contains BAR0 for 8 VFs)
[ 8.864095] pci 0000:05:00.0: VF(n) BAR4 space: [mem
0x8430e0000000-0x8430e0ffffff 64bit] (contains BAR4 for 8 VFs)
[ 8.875884] pci_bus 0000:05: busn_res: [bus 05-1f] end is updated to 05
[ 8.882619] pci 0000:00:01.0: PCI bridge to [bus 01]
[ 8.887659] pci 0000:00:09.0: PCI bridge to [bus 02]
[ 8.892659] pci 0000:00:0a.0: PCI bridge to [bus 03]
[ 8.897658] pci 0000:00:0c.0: PCI bridge to [bus 04]
[ 8.902660] pci 0000:00:0f.0: PCI bridge to [bus 05]
[ 8.909932] EINJ: ACPI disabled.
[ 8.924686] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 8.933841] SuperH (H)SCI(F) driver initialized
[ 8.938871] msm_serial: driver initialized
[ 8.944656] arm-smmu 830000000000.smmu0: probing hardware configuration...
[ 8.951569] arm-smmu 830000000000.smmu0: SMMUv2 with:
[ 8.956637] arm-smmu 830000000000.smmu0: stage 1 translation
[ 8.962400] arm-smmu 830000000000.smmu0: stage 2 translation
[ 8.968162] arm-smmu 830000000000.smmu0: nested translation
[ 8.973838] arm-smmu 830000000000.smmu0: coherent table walk
[ 8.979602] arm-smmu 830000000000.smmu0: stream matching with
128 register groups
[ 8.987198] arm-smmu 830000000000.smmu0: 64 context banks (0
stage-2 only)
[ 8.994179] arm-smmu 830000000000.smmu0: enabling workaround
for Cavium erratum 27704
[ 9.002120] arm-smmu 830000000000.smmu0: Supported page sizes: 0x62215000
[ 9.009014] arm-smmu 830000000000.smmu0: Stage-1: 48-bit VA -> 48-bit IPA
[ 9.015907] arm-smmu 830000000000.smmu0: Stage-2: 48-bit IPA -> 48-bit PA
[ 9.031844] loop: module loaded
[ 9.039648] mdio_thunder 0000:01:01.3: Adding to iommu group 0
[ 9.045966] libphy: mdio_thunder: probed
[ 9.052337] mdio_thunder 0000:01:01.3: Added bus at 87e005003800
[ 9.058552] libphy: mdio_thunder: probed
[ 9.064728] mdio_thunder 0000:01:01.3: Added bus at 87e005003880
[ 9.071696] libphy: Fixed MDIO Bus: probed
[ 9.076268] tun: Universal TUN/TAP device driver, 1.6
[ 9.082220] thunder_xcv, ver 1.0
[ 9.085782] thunder_xcv 0000:01:02.0: Adding to iommu group 1
[ 9.091860] thunder_bgx, ver 1.0
[ 9.095402] thunder_bgx 0000:01:10.0: Adding to iommu group 2
[ 9.101351] thunder_bgx 0000:01:10.0: BGX0 LMAC0 mode: SGMII
[ 9.127852] thunder_bgx 0000:01:12.0: Adding to iommu group 3
[ 9.165602] thunder_bgx 0000:01:12.0: BGX2 QLM mode: RGMII
[ 9.171607] nicpf, ver 1.0
[ 9.174554] nicpf 0000:05:00.0: Adding to iommu group 4
[ 9.285640] pci 0000:05:00.1: [177d:a034] type 00 class 0x020000
[ 9.292018] pci 0000:05:00.2: [177d:a034] type 00 class 0x020000
[ 9.298363] nicpf 0000:05:00.0: SRIOV enabled, number of VF available 2
[ 9.305751] hclge is initializing
[ 9.309075] hns3: Hisilicon Ethernet Network Driver for Hip08
Family - version
[ 9.316324] hns3: Copyright (c) 2017 Huawei Corporation.
[ 9.321789] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[ 9.327650] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 9.333699] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.6.0-k
[ 9.340683] igb: Copyright (c) 2007-2014 Intel Corporation.
[ 9.346371] igbvf: Intel(R) Gigabit Virtual Function Network Driver
- version 2.4.0-k
[ 9.354226] igbvf: Copyright (c) 2009 - 2012 Intel Corporation.
[ 9.360571] sky2: driver version 1.30
[ 9.365100] VFIO - User Level meta-driver version: 0.3
[ 9.372053] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 9.378632] ehci-pci: EHCI PCI platform driver
[ 9.383198] ehci-platform: EHCI generic platform driver
[ 9.388568] ehci-orion: EHCI orion driver
[ 9.392705] ehci-exynos: EHCI EXYNOS driver
[ 9.397006] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 9.403227] ohci-pci: OHCI PCI platform driver
[ 9.407788] ohci-platform: OHCI generic platform driver
[ 9.413159] ohci-exynos: OHCI EXYNOS driver
[ 9.417722] xhci_hcd 0000:00:10.0: Adding to iommu group 5
[ 9.423510] xhci_hcd 0000:00:10.0: xHCI Host Controller
[ 9.428800] xhci_hcd 0000:00:10.0: new USB bus registered, assigned
bus number 1
[ 9.436420] xhci_hcd 0000:00:10.0: hcc params 0x0220f665 hci
version 0x100 quirks 0x0000000000000010
[ 9.445600] xhci_hcd 0000:00:10.0: cache line size of 64 is not supported
[ 9.453538] hub 1-0:1.0: USB hub found
[ 9.457361] hub 1-0:1.0: 1 port detected
[ 9.461752] xhci_hcd 0000:00:10.0: xHCI Host Controller
[ 9.467017] xhci_hcd 0000:00:10.0: new USB bus registered, assigned
bus number 2
[ 9.474449] xhci_hcd 0000:00:10.0: Host supports USB 3.0 SuperSpeed
[ 9.480827] usb usb2: We don't know the algorithms for LPM for this
host, disabling LPM.
[ 9.489639] hub 2-0:1.0: USB hub found
[ 9.493434] hub 2-0:1.0: 1 port detected
[ 9.497982] xhci_hcd 0000:00:11.0: Adding to iommu group 6
[ 9.503673] xhci_hcd 0000:00:11.0: xHCI Host Controller
[ 9.508952] xhci_hcd 0000:00:11.0: new USB bus registered, assigned
bus number 3
[ 9.516552] xhci_hcd 0000:00:11.0: hcc params 0x0220f665 hci
version 0x100 quirks 0x0000000000000010
[ 9.525728] xhci_hcd 0000:00:11.0: cache line size of 64 is not supported
[ 9.533613] hub 3-0:1.0: USB hub found
[ 9.537406] hub 3-0:1.0: 1 port detected
[ 9.541798] xhci_hcd 0000:00:11.0: xHCI Host Controller
[ 9.547090] xhci_hcd 0000:00:11.0: new USB bus registered, assigned
bus number 4
[ 9.554529] xhci_hcd 0000:00:11.0: Host supports USB 3.0 SuperSpeed
[ 9.560884] usb usb4: We don't know the algorithms for LPM for this
host, disabling LPM.
[ 9.569691] hub 4-0:1.0: USB hub found
[ 9.573488] hub 4-0:1.0: 1 port detected
[ 9.578415] usbcore: registered new interface driver usb-storage
[ 9.587664] i2c /dev entries driver
[ 9.596296] sdhci: Secure Digital Host Controller Interface driver
[ 9.602514] sdhci: Copyright(c) Pierre Ossman
[ 9.607362] Synopsys Designware Multimedia Card Interface Driver
[ 9.614341] sdhci-pltfm: SDHCI platform and OF driver helper
[ 9.621617] ledtrig-cpu: registered to indicate activity on CPUs
[ 9.629351] usbcore: registered new interface driver usbhid
[ 9.634955] usbhid: USB HID core driver
[ 9.642878] NET: Registered protocol family 17
[ 9.647581] 9pnet: Installing 9P2000 support
[ 9.651932] Key type dns_resolver registered
[ 9.657029] registered taskstats version 1
[ 9.661169] Loading compiled-in X.509 certificates
[ 9.668687] pcieport 0000:00:01.0: Adding to iommu group 7
[ 9.674920] pcieport 0000:00:09.0: Adding to iommu group 8
[ 9.680831] pcieport 0000:00:0a.0: Adding to iommu group 9
[ 9.686785] pcieport 0000:00:0c.0: Adding to iommu group 10
[ 9.692804] pcieport 0000:00:0f.0: Adding to iommu group 11
[ 9.702958] irq: no irq domain found for gsc@20 !
[ 9.707742] irq: no irq domain found for gsc@20 !
[ 9.712484] irq: no irq domain found for gsc@20 !
[ 9.717226] irq: no irq domain found for gsc@20 !
[ 9.721967] irq: no irq domain found for gsc@20 !
[ 9.726748] gpio-keys gpio_keys: Found button without gpio or irq
[ 9.732884] gpio-keys: probe of gpio_keys failed with error -22
[ 9.738873] hctosys: unable to open rtc device (rtc0)
[ 9.744119] ALSA device list:
[ 9.747118] No soundcards found.
[ 9.750679] uart-pl011 87e028000000.serial: no DMA platform data
[ 9.761032] Freeing unused kernel memory: 9920K
[ 9.765773] Run /init as init process
Starting logging: [ 9.801825] usb 1-1: new high-speed USB device
number 2 using xhci_hcd
OK
Initializing random number genera[ 9.826920] random: dd:
uninitialized urandom read (512 bytes read)
tor... done.
Starting network: OK

Welcome to Buildroot
buildroot[ 10.024991] hub 1-1:1.0: USB hub found
[ 10.028861] hub 1-1:1.0: 5 ports detected
[ 10.089658] usb 2-1: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 10.136980] hub 2-1:1.0: USB hub found
[ 10.140859] hub 2-1:1.0: 5 ports detected
[ 10.797616] usb 1-1.1: new full-speed USB device number 3 using xhci_hcd
[ 10.993617] usb 1-1.2: new high-speed USB device number 4 using xhci_hcd
[ 11.185617] usb 1-1.5: new high-speed USB device number 5 using xhci_hcd
^^^^ console not accepting input here yet board is 'not' hung (led
heartbeat continues, cpu watchdog doesn't trip)

If I boot with arm-smmu.disable_bypass=n the kernel log looks
'exactly' the same yet I can interact with the console just fine.

The above is 5.3 using arch/arm64/configs/defconfig only changing
INITRAMFS_SOURCE.

Tirumalesh do you have any ideas here? This is a board modeled after
the Cavium ref designs with a CN8020 SoC and I would assume you guys
have run into this as you have Cavium developers contributing
mainline. I'm using the cn81xx-linux.dtsi from the Cavium SDK 6.2.0 p3
which I believe is the latest which can be found here:
https://github.com/Gateworks/dts-newport/blob/master/cn81xx-linux.dtsi

Tim

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