On 2012-05-07 10:51, Michael Tokarev wrote: > So, refreshing it all again with more correct information. > > First, it appears that only 32bit version of qemu userspace is > affected, and only when using 32bit version of guest. So far, > either 64bit qemu userpace or 64bit windows7 guest is enough > for the issue to not show up. Second, both win7 and winXP > (32bit) are affected. Third, current qemu-kvm/master appears > to be unaffected too. > > The problem is that on first and all subsequent guest REBOOT > (not first boot but really REBOOT) -- after the guest rebuilt > its HAL I guess, due to some changes in "hardware" it noticed, -- > the guest BSODs during boot with this code: > > STOP: 0x0000005C (0x000000000000010B, 0x0000000000000003, > 0x000000000000000, 0x000000000000000) > > After painful bisection between 1.0 and current git, the result > is this: > > First bad commit: > commit 5b6fb069378e61c45c577bbec3d7ef60367f7e4c > Author: Avi Kivity <a...@redhat.com> > Date: Thu Mar 1 12:58:46 2012 +0200 > > pc-bios: update kvmvapic.bin > > Signed-off-by: Avi Kivity <a...@redhat.com> > > diff --git a/pc-bios/kvmvapic.bin b/pc-bios/kvmvapic.bin > new file mode 100755 > index 0000000..045f5c2 > Binary files /dev/null and b/pc-bios/kvmvapic.bin differ > > Which, despite the name, actually INTRODUCES kvmvapic.bin, > not merely updates it. So apparently this introduction of > kvmvapic.bin resulted in autoloading implemented earlier to > starte entering the game, which appears to be this one: > > commit e5ad936b0fd7dfd7fd7908be6f9f1ca88f63b96b > Author: Jan Kiszka <jan.kis...@siemens.com> > Date: Fri Feb 17 18:31:19 2012 +0100 > > kvmvapic: Introduce TPR access optimization for Windows guests > > And indeed, we're talking about windows guests here... > > Anything I can do further to debug/fix the issue? >
I have a 32-bit WinXP here to test (but not a Win7-32) and will give it a try later. What irritates me is that qemu.git has a problem here but not latest qemu-kvm.git. Both are very similar now. Hmm, what is your qemu.git command line again? Does it include "-machine accel=kvm,kernel_irqchip=on" (to enable in-kernel irqchip)? Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux
