On 2/7/20 5:29 AM, Christophe Leroy wrote:

On 02/07/2020 01:08 PM, Guenter Roeck wrote:

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On 2/7/20 12:28 AM, Christophe Leroy wrote:

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On 02/07/2020 06:13 AM, Christophe Leroy wrote:

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Le 06/02/2020 à 21:31, Guenter Roeck a écrit :

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On Sat, Dec 21, 2019 at 08:32:38AM +0000, Christophe Leroy wrote:

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A few changes to retrieve DAR and DSISR from struct regs
instead of retrieving them directly, as they may have
changed due to a TLB miss.

Also modifies hash_page() and friends to work with virtual
data addresses instead of physical ones. Same on load_up_fpu()
and load_up_altivec().

Signed-off-by: Christophe Leroy <redacted>

This patch results in qemu boot failures (mac99 with pmac32_defconfig).
Images fail silently; there is no console output. Reverting the patch
fixes the problem. Bisect log is attached below.

Assuming this was tested on real hardware, am I correct to assume that qemu
for ppc32 (more specifically, qemu's mac99 and g3beige machines) no longer
works with the upstream kernel ?

Before submitting the series, I successfully tested:
- Real HW with powerpc 8xx
- Real HW with powerpc 832x
- Qemu's mac99

I'll re-check the upstream kernel.

This is still working for me with the upstream kernel:

Interesting. What is your kernel configuration, your qemu version, and
your qemu command line ?

Config is pmac32_defconfig + CONFIG_DEVTMPFS (But kernel also boots without CONFIG_DEVTMPFS)

QEMU emulator version 2.11.2

qemu-system-ppc -kernel vmlinux -M mac99 -initrd rootfs.cpio.gz -s -m 1024

Works with both GCC 5.5 and GCC 8.1

Actually, the problem is that I have locking selftest options enabled
in my tests. Everything works if I disable those. The "culprit" seems
to be CONFIG_PROVE_LOCKING. Can you retest with CONFIG_PROVE_LOCKING=y ?

Thanks,
Guenter