"Peter Maydell" <peter.mayd...@linaro.org> wrote on 04/05/2018 09:05:53 AM:
> From: "Peter Maydell" <peter.mayd...@linaro.org> > To: alar...@ddci.com > Cc: "QEMU Developers" <qemu-devel@nongnu.org> > Date: 04/05/2018 09:06 AM > Subject: Re: [Qemu-devel] -icount changes physical address assignments in QEMU 2.10/2.11 > > On 22 March 2018 at 05:31, <alar...@ddci.com> wrote: > > Your patch (applied to 2.11 source release) changed the behavior > > somewhat, but did not fix the problem. Attached is a binary that when > > run should show a CGA fontset and color bars. > > > > This command should "work": > > > > qemu-system-aarch64 -M virt,virtualization=on -cpu cortex-a53 -vga std > > -device secondary-vga -device virtio-net,netdev=vlan0,addr=2 -kernel > > icount-bug.bin -netdev user,id=vlan0 > > > > If you add "-icount 2" the display will appear, but be mangled. > > > > I didn't spend too much time trimming the source code, so if you need > > to step by step debug walking through the guest code, I'll have to > > prune it down some more. > > > > For the record, the QEMU source I have is modified slightly to add ARM WFE > > support, something I will submit once this is all straightened out, > > but this bug appeared before I made that patch. > > Hi; sorry for the delay in testing this. I've just tried your > attached test image with current head of git QEMU (commit > 0e87fdc966d05f4e5ad86, which is the 2.12.0-rc2 release candidate), > and it gives me a correct display both with and without -icount 2. > So I think we've fixed this bug, probably with the combination > of commits 0790f86861079b19 and 87f963be66a3245, or possibly > a75a52d62418da. > > thanks > -- PMM Thank you for your help. > I've just tried your attached test image ... Curious. I just downloaded qemu-2.12.0-rc2.tar.xz and built it using Cygwin (a version from about a month ago) using mingw compilers (mingw64-i686-gcc-g++ 6.4.0), and I still see the issue when the resulting QEMU binary is run using -icount 2 against my test binary, but not when run without -icount. Here are the commands used: ../qemu-2.12.0-rc2/configure --python=/usr/bin/python \ '--with-pkgversion=DDCI QEMU 2.12.0-rc2' \ --prefix=/usr/local/qemu \ --enable-sdl --with-sdlabi=2.0 \ '--target-list=aarch64-softmmu ppc64-softmmu x86_64-softmmu' \ --cross-prefix=i686-w64-mingw32- /usr/bin/make -Otarget -j 8 Any suggestions of things to try? If you think this is a build environment issue, I can try MSYS and report my results.
