On 14/11/2016 11:08, Anand J wrote: > Hi, > > Further investigation to the issue revealed that this happens before the > guest OS get to execute. KVM is not able to emulate a PF happened during a > jump to 0x40000000. > > Folowing is the trace of instructions at which the emulation error is > happening. > > ---------------- > IN: > CR3: 00000000b8590000 > CR2: 0000000000000000 > 0x00000000000eeccf: setl %al > 0x00000000000eecd2: movzbl %al,%eax > 0x00000000000eecd5: neg %eax > 0x00000000000eecd7: or $0x1,%eax > 0x00000000000eecda: jmp 0xeece3 > > ---------------- > IN: > CR3: 00000000b8590000 > CR2: 0000000000000000 > 0x00000000000eece3: pop %ebx > *0x00000000000eece4: ret * > > vmexit(0000004e, 0000000000000000, 0000000040000000, 0000000040000000)! > CR2: 0000000000000000 > vmsave! 00000000b8592000 > FS: 0000000000000000 | 0000000000000000 > ---------------- > > Bold ret instruction causes a VMEXIT due to page fault. Can anyone please > help me figure out possible causes for this issue?
Sorry, I cannot really guess what's going on. All I can suggest is to look at KVM's trace normally and under QEMU, and find the difference. Paolo > Thanks, > Anand > > On Mon, Oct 24, 2016 at 2:35 PM, Anand J <anand.induk...@gmail.com> wrote: > >> >> ---------- Forwarded message ---------- >> From: Anand J <anand.induk...@gmail.com> >> Date: Mon, Oct 24, 2016 at 4:28 AM >> Subject: facing issue with qemu amd-v support >> To: qemu-disc...@nongnu.org >> >> >> Hi, >> >> I'm running fedora-24_x86_64 inside qemu in software mode. I configured >> KVM in the guest OS and want to run qemu inside the guest with kvm enabled. >> But qemu is throwing the following error. Does anybody know how to fix this? >> >> KVM internal error. Suberror: 1 >> emulation failure >> EAX=ffffffff EBX=4000004b ECX=00000000 EDX=000f5ea0 >> ESI=00000000 EDI=00000000 EBP=00000000 ESP=00006fd0 >> EIP=40000000 EFL=00000086 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 >> ES =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA] >> CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA] >> SS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA] >> DS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA] >> FS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA] >> GS =0010 00000000 ffffffff 00c09300 DPL=0 DS [-WA] >> LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT >> TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy >> GDT= 000f7180 00000037 >> IDT= 000f71be 00000000 >> CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000 >> DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 >> DR3=0000000000000000 >> DR6=00000000ffff0ff0 DR7=0000000000000400 >> EFER=0000000000000000 >> Code=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 >> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >> 00 00 00 >> >> >> Thanks, >> Anand >> >> >
