On Tue, May 30, 2017 at 02:05:15PM -0500, Rob Landley wrote: > On 05/29/2017 05:14 AM, Richard W.M. Jones wrote: > > I see in the disassembly use of cmovne (new in Pentium Pro) and > > bswap (new in 486). > > [http://cse.unl.edu/~goddard/Courses/CSCE351/IntelArchitecture/InstructionSetSummary.pdf] > > > > The cmovne instruction is generated by the compiler (GCC in my case), > > > > The following patch removes the cmovne instruction, so it should work > > on 486 (although I didn't test it). It's not possible to remove bswap > > without surgery on the inline assembler. > > Is there any way to make it just _not_ load the option rom for -cpu 486? > It ran fine before that thing went in...
Well it ran, but it was very slow. The DMA method can be literally orders of magnitude faster. Does adding the flag I suggested help? Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html
