On 29/11/2017 19:42, Eduardo Habkost wrote: > The reproducer (not a full test case) is quite simple, see patch below.
Great, thanks. I assume that the patch doesn't fix it?!? Paolo > Now, I've noticed something interesting when running the > reproducer: > > If the test_fetch_failure() call happens before we touch > pci-testdev through *mem (like in the patch below), we get an > emulation failure like the one Yanan saw: > > $ /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device > isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device > pci-testdev -machine accel=kvm -kernel ./x86/emulator.flat # -initrd > /tmp/tmp.RCPjppRp8i > enabling apic > paging enabled > cr0 = 80010011 > cr3 = 45e000 > cr4 = 20 > KVM internal error. Suberror: 1 > emulation failure > RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 > RDX=0000000000000000 > RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 > RSP=0000000000000000 > R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 > R11=0000000000000000 > R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 > R15=0000000000000000 > RIP=ffffffffffffc08a RFL=00010002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 > ES =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] > CS =0008 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] > SS =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] > DS =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] > FS =0010 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] > GS =0010 0000000000454d60 ffffffff 00c09300 DPL=0 DS [-WA] > LDT=0000 0000000000000000 0000ffff 00008200 DPL=0 LDT > TR =0080 000000000041148a 0000ffff 00008b00 DPL=0 TSS64-busy > GDT= 000000000041100a 0000047f > IDT= 0000000000000000 00000fff > CR0=80010011 CR2=ffffffffffffc08a CR3=000000000045e000 CR4=00000020 > DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 > DR3=0000000000000000 > DR6=00000000ffff0ff0 DR7=0000000000000400 > EFER=0000000000000500 > Code=?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? <??> ?? ?? > ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? > ??
