https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git cannot boot qemu aarch64 since v4.6 but good on v4.5 (while arm works)

gistfile1.txt

git bisect shows bad commit: 406e308770a92bd33995b2e5b681e86358328bb0

commit 406e308770a92bd33995b2e5b681e86358328bb0
Author: James Morse <[email protected]>
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 <[email protected]>
    Reviewed-by: Suzuki K Poulose <[email protected]>
    Signed-off-by: Catalin Marinas <[email protected]>

As it added new id, the problem should be my qemu (ubuntu 16.04 one) not support it.