On Wed, 21 Nov 2007 09:36:31 pm Dan Kenigsberg wrote: > These patches expose host CPU features (that are known to work under > KVM) to guests. It makes a couple of benchmarks run faster, and > generally gives kvm's user better info on its host. > > The kernel-space patch adds KVM_GET_SUPPORTED_CPUID ioctl to obtain the > table of cpuid functions supported by the host. The user-space patch > allows fine-tuning this table from the command-line. > > I had to define struct kvm_cpuid2, KVM_SET_CPUID2 etc., because cpuid > functions are a little more complex than just function-value pairs. > > Dan.
With current kvm-git (commit 51727a110220681f6f43b005d069e28c58f5d151) (userspace is current to commit 6a385c9539f9746d7ff51ef34c064c3eba86448b) and the userspace portion of this patch I cannot boot a 64 bit guest (Mandriva 2008 x64) on my AMD x2 without -cpu host. The guest kernel says "Your CPU does not support long mode. Use a 32bit distribution.". Works fine without the userspace portion of the patch. With -cpu host, the 64bit kernel starts to boot then panics almost immediately: Code: 0f 30 e9 ed fc ff ff b8 66 00 00 00 f0 0f ab 45 08 e9 e2 fa RIP [<ffffffff8020ff99> identify_cpu+0x609/0x700 RSP <ffffffff8057df58> Kernel panic - not syncing: Attempted to kill the idle task! In the host log I see: cpu0 unhandled wrmsr: 0xc0010015, which might not have anything to do with this patch of course :) Mike ------------------------------------------------------------------------- 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
