Ticket #9425 (new defect)
Opened 6 years ago
CPUID Leaf 4 not functioning on Core i7
|Reported by:||Ameise||Owned by:|
|Version:||VirtualBox 4.1.0||Keywords:||cpuid intel cache|
When using the hypervisor (VT-x) and in Long Mode, when executing a CPUID Leaf 4 operation on my CPU (Intel Core i7), with the level being 3 (L3 cache), it is returning all zeros. If I execute the same operation on bare metal, it returns the proper data.
mov rax, 0x4 mov rcx, 0x3 cpuid ; rax, rbx, rcx, and rdx are all zeros.
It should report the cache information for the level 3 cache.
If running Linux on this, Linux reports the L3 cache as non-existent, and the L2 cache as being 6MB. Running CPUID on bare metal reports the L2 cache as 256KB, and the L3 cache as 8MB.