Avi Kivity wrote: > Laurent Vivier wrote: >> Avi Kivity wrote: >> >>> Laurent Vivier wrote: >>> >>>> These patches split the emulator in two parts: one to decode the >>>> instruction, >>>> the other to execute it. The decode part is then called only when needed. >>>> >>>> >>>> >>> Patchset looks good, but fails booting FC6 x86-64 on Intel. It may be a >>> merge error (did not apply cleanly due to other changes). I pushed this >>> as a 'split-emulator' branch on the kvm.git repository. >>> >>> >> I think I found the bug (not a merge error...): I just supposed that an >> instruction fetch cannot failed. >> >> > > Interesting. I don't see how an instruction fetch can fail on > uniprocessor. Can you give details of the failure? > > Instruction fetches can fail on SMP so a fix is certainly needed.
OK, I spoke too fast.
x86_decode_insn() fails because it is not able to decode:
0xffffffff8110b7ef <__copy_user_nocache+47>: movnti %r11,(%rdi)
or
0xffffffff8110b7ef <__copy_user_nocache+47>: 0x4c 0x0f 0xc3 0x1f
0x4c is decoded as a REX prefix.
0x0f is decoded as a Two-byte opcode
but 0xc3 is unknown in twobyte_table, so we exit because of an unrecognized
opcode ("Cannot emulate").
Some comments ?
Laurent
--
------------- [EMAIL PROTECTED] --------------
"Software is hard" - Donald Knuth
signature.asc
Description: OpenPGP digital signature
------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
