Zachary Amsden wrote: > H. Peter Anvin wrote: >> http://www.kernel.org/pub/linux/kernel/people/hpa/new-cpuid-msr.patch > > The requested URL /pub/linux/kernel/people/hpa/new-cpuid-msr.patch was > not found on this server. Fixed. >> It's not *quite* that easy. The assembly code around this is pretty >> extensive, because it has to stand on its head in order to present the >> proper register image. > > Having just stood on my head for 55 breaths, might I suggest we > implement a binary equivalent CPUID paravirt-ops wrapper; then the > assembly code can just call CPUID and we can redefine it to call to a > stub, which makes the pv-ops CPUID call, the puts the outputs back in > the proper registers. > > The VMI ROM CPUID is binary identical in register format with the native > instruction, so it need not do a headstand. For the others, > [snip] This code is almost entirely identical to the setgpr_wrapper in the patch (except for the fact that setgpr_wrapper sets and captures *ALL* the GPRs), and it seems rather pointless to use another wrapper. It takes a pointer to an entrypoint (default to "cpuid; ret" in the CPUID case), so it should do what you need. -hpa _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
