(apologies if this doesn't get properly threaded into: http://lists.nongnu.org/archive/html/qemu-devel/2019-04/msg03407.html)
> After upgrading host (Gentoo Linux) a Windows XP guest can't boot anymore. > > Some findings while testing: > > * XP image boots & works OK on an Intel machine (Gentoo Linux) > ** qemu: 3.1.0-r4 > ** kernel: 5.0.7 > ** CPU: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz > > * XP image FAILS to boot on an AMD machine (Gentoo Linux) > ** qemu: 3.1.0-r4 > ** kernel: 4.19.34 > ** CPU: AMD FX-6300 Six-Core Processor > ** image boots OK if NOT using --enable-kvm > > * XP image FAILS to boot on an AMD machine (Gentoo Linux) > ** qemu: 3.1.0-r4 & 3.1.0-r1 > ** kernel: 4.19.34 & 5.0.7 > ** CPU: AMD Opteron(tm) Processor 4170 HE > ** image boots OK if NOT using --enable-kvm > ** The image worked OK on this machine with Qemu 2.12.1 & Kernel 4.18.20 Same here, on an AMD Athlon(tm) X4 860K Quad Core Processor AFAICS, something has gone wrong starting with kernel-5.0.6 For me: GOOD BAD 4.20.14 5.0.6 5.0.2 5.0.7 5.0.3 5.0.4 5.0.5 Full details available in my earlier report here https://bugzilla.kernel.org/show_bug.cgi?id=203327 I've updated my original report with a reference to this one. ciao -gabriele