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From: | Alexander Graf |
Subject: | Re: [Qemu-devel] v2: KVM: support for 'count' in CPUID functions 4, 0xb and 0xd. |
Date: | Tue, 13 Jan 2009 09:25:32 +0100 |
On 13.01.2009, at 08:09, Amit Shah wrote:
These two patches were sent separately earlier. There are a couple ofsmall changes in this version, including removal of a debug message thatwas left behind.
Are you sure this actually implements the CPUID 4 leaf? I bet it simply submits multiple KVM_SET_CPUID ioctls, from which the kernel module picks the last one (0), not exposing _any_ cache information to the guest.
For exactly this purpose KVM_SET_CPUID2 was introduced quite a while ago, enabling support for all CPUID leaf flavors on the kernel side. Merely the userspace call is missing.
Nevertheless - thanks for taking onto this. Cpuid4 enabling is one of the (pretty low-prio) items on my TODO list for Mac OS X guest support.
Alex
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