[Qemu-devel] [Bug 1735653] [NEW] qemu aarch64 cannot boot linux kernel v4.6+

[Joey Jiao]

Public bug reported:

Hi,
I tested the latest qemu-system-aarch64 cannot boot linux mainline kernel since 
v4.6 from https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git.

Environment info:
# host
 ubuntu 16.04
# qemu
 Master branch from git://git.qemu.org/qemu.git, and now the HEAD is 
c11d61271b9e6e7a1f0479ef1ca8fb55fa457a62.
# build command
 ./configure --target-list=aarch64-softmmu
 make
# qemu commmand
 qemu-system-aarch64 -machine virt -cpu cortex-a57 -machine type=virt -smp 4 -m 
1024 -nographic -s -kernel ~/workspace/linux/arch/arm64/boot/Image -device 
e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::2222-:22

Error info:
 No error prompted, actually no any log which means I couldn't see the usually 
kernel boot message.

Debug info:
 I did a git bisect on linux, and found with this kernel commit, qemu failed to 
boot. Parent of 406e308770a92bd33995b2e5b681e86358328bb0 can boot.
 commit 406e308770a92bd33995b2e5b681e86358328bb0
    Author: James Morse <address@hidden>
    Date:   Fri Feb 5 14:58:47 2016 +0000

    arm64: add ARMv8.2 id_aa64mmfr2 boiler plate

    ARMv8.2 adds a new feature register id_aa64mmfr2. This patch adds the
    cpu feature boiler plate used by the actual features in later patches.

    Signed-off-by: James Morse <address@hidden>
    Reviewed-by: Suzuki K Poulose <address@hidden>
    Signed-off-by: Catalin Marinas <address@hidden>
 The main change in the patch is to add reg_id_aa64mmfr2 in to 
arch/arm64/include/asm/cpu.h, so might it be any struct change not included in 
qemu?

Can you please help check how to fix it?

Thanks

- Joey

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: qemu-system-aarch64

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1735653

Title:
  qemu aarch64 cannot boot linux kernel v4.6+

Status in QEMU:
  New

Bug description:
  Hi,
  I tested the latest qemu-system-aarch64 cannot boot linux mainline kernel 
since v4.6 from 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git.

  Environment info:
  # host
   ubuntu 16.04
  # qemu
   Master branch from git://git.qemu.org/qemu.git, and now the HEAD is 
c11d61271b9e6e7a1f0479ef1ca8fb55fa457a62.
  # build command
   ./configure --target-list=aarch64-softmmu
   make
  # qemu commmand
   qemu-system-aarch64 -machine virt -cpu cortex-a57 -machine type=virt -smp 4 
-m 1024 -nographic -s -kernel ~/workspace/linux/arch/arm64/boot/Image -device 
e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::2222-:22

  Error info:
   No error prompted, actually no any log which means I couldn't see the 
usually kernel boot message.

  Debug info:
   I did a git bisect on linux, and found with this kernel commit, qemu failed 
to boot. Parent of 406e308770a92bd33995b2e5b681e86358328bb0 can boot.
   commit 406e308770a92bd33995b2e5b681e86358328bb0
      Author: James Morse <address@hidden>
      Date:   Fri Feb 5 14:58:47 2016 +0000

      arm64: add ARMv8.2 id_aa64mmfr2 boiler plate

      ARMv8.2 adds a new feature register id_aa64mmfr2. This patch adds the
      cpu feature boiler plate used by the actual features in later patches.

      Signed-off-by: James Morse <address@hidden>
      Reviewed-by: Suzuki K Poulose <address@hidden>
      Signed-off-by: Catalin Marinas <address@hidden>
   The main change in the patch is to add reg_id_aa64mmfr2 in to 
arch/arm64/include/asm/cpu.h, so might it be any struct change not included in 
qemu?

  Can you please help check how to fix it?

  Thanks

  - Joey

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1735653/+subscriptions