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[Qemu-devel] Win2k broken by kvmvapic
From: |
Blue Swirl |
Subject: |
[Qemu-devel] Win2k broken by kvmvapic |
Date: |
Sun, 7 Oct 2012 15:23:23 +0000 |
Hi,
Win2k does not work in HEAD, it resets the machine. I bisected this to
0b57e287138728f72d88b06e69b970c5d745c44a, but that does not look so
buggy.
Digging deeper, the problem is introduced by kvmvapic:
Breakpoint 1, cpu_physical_memory_write_rom (addr=0xca300,
buf=0x7fffec66b500 "", len=0x5) at /src/qemu/exec.c:3536
3536 invalidate_and_set_dirty(addr1, l);
(gdb) bt
#0 cpu_physical_memory_write_rom (addr=0xca300, buf=0x7fffec66b500 "",
len=0x5) at /src/qemu/exec.c:3536
#1 0x0000000000644089 in apic_sync_vapic (s=0x1a6ba60, sync_type=0x2)
at /src/qemu/hw/i386/../apic.c:132
It looks like vapic is enabled even with KVM disabled and this causes
chaos. With -global apic.vapic=false Win2k works.
Maybe vapic shouldn't be enabled at all if KVM is not available and
apic_common.c needs kvm_enabled() checks before using vapic?
- [Qemu-devel] Win2k broken by kvmvapic,
Blue Swirl <=