Re: [PATCH v3 00/16] powerpc/32: Use BATs/LTLBs for STRICT_KERNEL_RWX

From: Michael Ellerman
Date: Wed Feb 20 2019 - 20:47:34 EST


Christophe Leroy <christophe.leroy@xxxxxx> writes:

> The purpose of this serie is to:
> - use BATs with STRICT_KERNEL_RWX on book3s (See patch 13 for details.)
> - use LTLBs with STRICT_KERNEL_RWX on 8xx (See patch 15 for a few details.)

This doesn't boot qemu-mac99 for me:

spawn ~/src/qemu/ppc-softmmu/qemu-system-ppc -nographic -vga none -M mac99 -m 1G -kernel build/vmlinux -initrd ppc32-initrd.gz -append console=ttyPZ0 init=/bin/sh
>> =============================================================
>> OpenBIOS 1.1 [Feb 15 2019 10:05]
>> Configuration device id QEMU version 1 machine id 1
>> CPUs: 1
>> Memory: 1024M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,G4
milliseconds isn't unique.
Welcome to OpenBIOS v1.1 built on Feb 15 2019 10:05
>> [ppc] Kernel already loaded (0x01000000 + 0x00c2c338) (initrd 0x01d2d000 + 0x007e72f0)
>> [ppc] Kernel command line: console=ttyPZ0 init=/bin/sh
>> switching to new context:
OF stdout device is: /pci@f2000000/mac-io@c/escc@13000/ch-a@13020
Preparing to boot Linux version 5.0.0-rc2-gcc-8.2.0-00125-g4fcb83ca7936 (michael@ka4) (gcc version 8.2.0 (Buildroot 2018.11-rc2-00003-ga0787e9)) #724 Thu Feb 21 12:03:14 AEDT 2019
Detected machine type: 00000400
command line:
memory layout at init:
memory_limit : 00000000 (16 MB aligned)
alloc_bottom : 02515000
alloc_top : 30000000
alloc_top_hi : 40000000
rmo_top : 30000000
ram_top : 40000000
copying OF device tree...
Building dt strings...
Building dt structure...
Device tree strings 0x02516000 -> 0x025150a4
Device tree struct 0x02517000 -> 0x3fde7eb0
Quiescing Open Firmware ...
Booting Linux via __start() @ 0x01000000 ...
FAIL! Booting BE pmac32


That's pmac32 defconfig ish.
I haven't had time to debug it further sorry.

cheers