H. Peter Anvin wrote: > I have finally gotten off the pot and finished writing up my new > CPUID/MSR driver, which contains support for registers that need > arbitrary GPRs touched. For i386 vs x86-64 compatibility, both use an > x86-64 register image (16 64-bit register fields); this allows 32-bit > userspace to access the full 64-bit image if the kernel is 64 bits. > > Anyway, this presumably requires new paravirtualization hooks. The > patch is at: > > 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. > ... and a git tree is at ... > > http://git.kernel.org/?p=linux/kernel/git/hpa/linux-2.6-cpuidmsr.git;a=summary > > I'm posting this here to give the paravirt maintainers an opportunity to > comment. Presumably the functions that need to be paravirtualized are > the ones represented by the functions do_cpuid(), do_rdmsr() and > rdmsr / wrmsr can be dropped from paravirt-ops; at least for us (they will trap and emulate just fine, and this driver is not performance critical), and I think for the others as well. CPUID, however, does require a hook. Zach _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
