[Qemu-devel] [Bug 1790975] Re: Default arm virt machine broken

[Jonathan Marler]

LPAE is actually disabled in my kernel config.  Knowing the cause now, I
can see that qemu would not be able to detect this problem.  This error
should have been detected in the linux kernel with an indication that
the ECAM window was using a 40-bit address but LPAE was not enabled.

** Changed in: qemu
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1790975

Title:
  Default arm virt machine broken

Status in QEMU:
  Invalid

Bug description:
  This occurs on qemu_v3.0.0 but not on qemu_v2.12.2 (built from
  qemu_v3.0.0 tag on github)

  Symptom: You'll see something like this in the kernel output:

  [    1.285210] OF: PCI: host bridge /address@hidden ranges:
  [    1.286246] OF: PCI:    IO 0x3eff0000..0x3effffff -> 0x00000000
  [    1.287061] OF: PCI:   MEM 0x10000000..0x3efeffff -> 0x10000000
  [    1.287820] OF: PCI:   MEM 0x8000000000..0xffffffffff -> 0x8000000000
  [    1.289312] pci-host-generic 4010000000.pcie: can't claim ECAM area [mem 
0x10000000-0x1fffffff]: address conflict with /address@hidden [mem 
0x10000000-0x3efeffff]
  [    1.290984] pci-host-generic: probe of 4010000000.pcie failed with error 
-16

  Qemu Command Line: qemu-system-arm -machine virt -m 1024M -kernel
  zImage -serial stdio

  I can post my zImage if anyone has problems reproducing with their own
  zImage.

  Note that this problem breaks pci making the machine unusable.

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