QEMU HEAD still uses a 32-bit binary for both 32-bit and 64-bit. That one uses mtsrin so will need the compatibility, it seemed affected, too.
OpenBIOS SVN HEAD (blob) uses slb* as linked to. We're in the preparation of 1.1 and I need to test it before we can update the QEMU binary. ;) Sorry for top-posting, Android sucks. Andreas David Gibson <da...@gibson.dropbear.id.au> schrieb: >On Thu, May 19, 2011 at 08:00:53AM +0200, Andreas Färber wrote: >> Am 19.05.2011 um 07:39 schrieb David Gibson: >> >> >On Thu, May 19, 2011 at 07:35:30AM +0200, Andreas Färber wrote: >> >>Am 25.03.2011 um 04:21 schrieb David Gibson: >> >> >> >>>Currently the SLB information when emulating a PowerPC 970 is >> >>>storeed in a structure with the unhelpfully named fields 'tmp' >> >>>and 'tmp64'. While the layout in these fields does match the >> >>>description of the SLB in the architecture document, it is not >> >>>convenient either for looking up the SLB, or for emulating the >> >>>slbmte instruction. >> >>> >> >>>This patch, therefore, reorganizes the SLB entry structure to be >> >>>divided in the the "ESID related" and "VSID related" fields as >> >>>they are divided in instructions accessing the SLB. >> >>> >> >>>In addition to making the code smaller and more readable, this will >> >>>make it easier to implement for the 1TB segments used in more >> >>>recent PowerPC chips. >> >>> >> >>>Signed-off-by: David Gibson <d...@au1.ibm.com> >> >> >> >>According to my bisect, this patch broke ppc64 OpenBIOS. >> >> >> >>David, would you please take a look? >> > >> >Uh, sure. can you describe the symptoms of the breakage, and the >> >exact qemu setup you've observed the problem with? >> >> $ uname -a >> Darwin PMG5-3.local 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 >> 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC Power Macintosh >> # Mac OS X 10.5.8 on dual-core G5 >> >> $ gcc-4.2 --version >> powerpc-apple-darwin9-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5577) >> Copyright (C) 2007 Free Software Foundation, Inc. >> This is free software; see the source for copying conditions. There >> is NO >> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR >> PURPOSE. >> >> ../qemu/configure --prefix=/Users/andreas/QEMU/latest64 \ >> --target-list=ppc-softmmu,ppc64-softmmu \ >> --extra-cflags="-arch ppc64" --extra-ldflags="-arch ppc64" --cc=gcc-4.2 >> --host-cc=gcc-4.2 \ >> --enable-cocoa --disable-kvm --disable-strip --disable-docs >> --enable-io-thread $* >> # I/O thread doesn't matter >> >> /Users/andreas/QEMU/qemu64/ppc64-softmmu/qemu-system-ppc64 -boot d -cdrom >> /Users/andreas/QEMU/AIX/dvd.1022A4_OBETA_710.iso \ >> -bios /Users/andreas/QEMU/OpenBIOS/openbios/obj-ppc64/openbios-qemu.elf >> -m 1024 \ >> -M mac99 -prom-env 'auto-boot?=false' -nographic >> >> CD should be irrelevant, -boot c -hda /dev/null should work the same. > >Um, yeah, I thought putting an AIX dvd into a Mac was a bit odd. > >> Expected: OpenBIOS banner and > prompt >> Observed: DSI exception on mtmsrd, no serial output > >Does this happen only with your openbios image, or does it also happen >with the one included in qemu? > >My working theory is that openbios is using the old 32-64 bridge stuff >where segment register accesses are emulated to populate certain SLB >slots. I have a vague recollection that I saw the code implementing >that when I was doing the cleanup and convinced myself it was not >necessary. More information as I investigate further. > >> (The regression on ppc32 AIX observed by Kenneth seems to be a >> different issue, introduced earlier.) > >I don't know what that regression is; I don't read qemu-devel >exhaustively. If you want my attention, best to CC me directly. > >-- >David Gibson | I'll have my music baroque, and my code >david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ > | _way_ _around_! >http://www.ozlabs.org/~dgibson
