Hi Guenter, On Wed, Dec 23, 2015 at 04:52:51PM -0800, Guenter Roeck wrote: > Hi all, > > since commit 60792ad349f3 ("arm64: kernel: enforce pmuserenr_el0 > initialization > and restore"), my arm64 qemu tests of linux-next are failing. After this > commit, > qemu does not display any output. > > Qemu version is 2.5.0. Linux kernel configuration is arm64:defconfig. > > qemu command line is as follows: > > qemu-system-aarch64 -machine virt -cpu cortex-a57 -machine type=virt > -nographic -smp 1 \ > -m 512 -kernel arch/arm64/boot/Image -initrd rootfs.arm64.cpio > -no-reboot \ > -append "console=ttyAMA0" > > Any idea what might cause this problem and how to fix it (presumably in qemu) > ?
We took notice of this and we are going to look into it shortly, thanks for the heads-up. Lorenzo > > Bisect log is attached below. Reverting commit 60792ad349f3 on top of > linux-next > fixes the problem. > > Thanks, > Guenter > > --- > # bad: [80c75a0f1d81922bf322c0634d1e1a15825a89e6] Add linux-next specific > files for 20151223 > # good: [4ef7675344d687a0ef5b0d7c0cee12da005870c0] Linux 4.4-rc6 > git bisect start 'HEAD' 'v4.4-rc6' > # bad: [52c8be920db8e42d195ca7fe93fe31aa9958100e] Merge remote-tracking > branch 'drm/drm-next' > git bisect bad 52c8be920db8e42d195ca7fe93fe31aa9958100e > # bad: [ef1ebde6af4d839a07d787440e35f0ae3b02e567] Merge remote-tracking > branch 'v4l-dvb/master' > git bisect bad ef1ebde6af4d839a07d787440e35f0ae3b02e567 > # bad: [1e4012d4f91fd118167f14c4172bf779a7884d26] Merge remote-tracking > branch 'tegra/for-next' > git bisect bad 1e4012d4f91fd118167f14c4172bf779a7884d26 > # good: [392fd3291c93094ca65853cca5e168016c4e08b1] Merge branch 'next/dt64' > into for-next > git bisect good 392fd3291c93094ca65853cca5e168016c4e08b1 > # bad: [49fc6d2449b0cebd9738694a9c9ee794c3686797] Merge remote-tracking > branch 'omap/for-next' > git bisect bad 49fc6d2449b0cebd9738694a9c9ee794c3686797 > # bad: [f5a47ef34509cbce244c18bef02b175d0e48dc4f] Merge remote-tracking > branch 'at91/at91-next' > git bisect bad f5a47ef34509cbce244c18bef02b175d0e48dc4f > # good: [59f8d523983105e8490603ae1c0798207e9781e6] Merge remote-tracking > branch 'arc/for-next' > git bisect good 59f8d523983105e8490603ae1c0798207e9781e6 > # good: [40499303a6c59c96da587a91fca617017106e908] Merge branch > 'next/defconfig' into for-next > git bisect good 40499303a6c59c96da587a91fca617017106e908 > # good: [ea07b401d16052b43782c6389c9c2115aa3077ff] Merge branches 'component' > and 'misc' into for-next > git bisect good ea07b401d16052b43782c6389c9c2115aa3077ff > # bad: [5d7ee87708d4d86fcc32afc9552d05f7625d303d] arm64: perf: add support > for Cortex-A72 > git bisect bad 5d7ee87708d4d86fcc32afc9552d05f7625d303d > # good: [9e9caa6a496174e53d7753baa4779717771da4a7] arm64: perf: Add event > descriptions > git bisect good 9e9caa6a496174e53d7753baa4779717771da4a7 > # bad: [60792ad349f3c6dc5735aafefe5dc9121c79e320] arm64: kernel: enforce > pmuserenr_el0 initialization and restore > git bisect bad 60792ad349f3c6dc5735aafefe5dc9121c79e320 > # good: [aae881ad73460e1b2aea01f079a0541bd5a9136c] arm64: perf: Correct > Cortex-A53/A57 compatible values > git bisect good aae881ad73460e1b2aea01f079a0541bd5a9136c > # first bad commit: [60792ad349f3c6dc5735aafefe5dc9121c79e320] arm64: kernel: > enforce pmuserenr_el0 initialization and restore >