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

[Christophe Leroy]

Le 21/02/2019 Ã 07:31, Christophe Leroy a ÃcritÂ:
> Le 21/02/2019 Ã 02:47, Michael Ellerman a ÃcritÂ:
> > 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:
> >
> > ÂÂ 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
> > ÂÂ >> =============================================================
> > ÂÂ >> OpenBIOS 1.1 [Feb 15 2019 10:05]
> > ÂÂ >> Configuration device id QEMU version 1 machine id 1
> > ÂÂ >> CPUs: 1
> > ÂÂ >> Memory: 1024M
> > ÂÂ >> UUID: 00000000-0000-0000-0000-000000000000
> > ÂÂ >> CPU type PowerPC,G4
> > ÂÂ milliseconds isn't unique.
> > ÂÂ Welcome to OpenBIOS v1.1 built on Feb 15 2019 10:05
> > ÂÂ >> [ppc] Kernel already loaded (0x01000000 + 0x00c2c338) (initrd 
> > 0x01d2d000 + 0x007e72f0)
> > ÂÂ >> [ppc] Kernel command line: console=ttyPZ0 init=/bin/sh
> > ÂÂ >> switching to new context:
> > ÂÂ OF stdout device is: /pci@f2000000/mac-io@c/escc@13000/ch-a@13020
> > ÂÂ 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
> > ÂÂ Detected machine type: 00000400
> > ÂÂ command line:
> > ÂÂ memory layout at init:
> > ÂÂÂÂ memory_limit : 00000000 (16 MB aligned)
> > ÂÂÂÂ alloc_bottom : 02515000
> > ÂÂÂÂ alloc_topÂÂÂ : 30000000
> > ÂÂÂÂ alloc_top_hi : 40000000
> > ÂÂÂÂ rmo_topÂÂÂÂÂ : 30000000
> > ÂÂÂÂ ram_topÂÂÂÂÂ : 40000000
> > ÂÂ copying OF device tree...
> > ÂÂ Building dt strings...
> > ÂÂ Building dt structure...
> > ÂÂ Device tree strings 0x02516000 -> 0x025150a4
> >  Device tree struct 0x02517000 -> 0x3fde7eb0
> > ÂÂ Quiescing Open Firmware ...
> > ÂÂ Booting Linux via __start() @ 0x01000000 ...
> > ÂÂ FAIL! Booting BE pmac32
> >
> >
> > That's pmac32 defconfig ish.
> > I haven't had time to debug it further sorry.
>
> Ok. I boots fine without the '-m 1G'.
>
> I'll find out why.

Doesn't boot because it maps memory above total_lowmem.

I'll fix it.

Christophe