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Ticket Resolution Summary Owner Reporter
#9425 obsolete CPUID Leaf 4 not functioning on Core i7 Ameise
Description

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.

#1248 invalid CPUID doesn't expose "SYSENTER/SYSEXIT" in spite of supporting it nurnware
Description

Hi,

the CPUID-instruction passes through the cpu's name etc. but lacks the bit 11 (CPU_FEATURE_SEP) that indicates support for sysenter. I tried to alter a kernel that I have developed to skip the check for this particular bit and it worked. So there seems to be support for SYSENTER/SYSEXIT anyway.

best, nurnware

#2811 fixed CRUX 2.5 CD-ROM fails to boot Jelle Geerts
Description

When booting the CRUX 2.5 ISO, it stops at "Loading modules... IDE" and VirtualBox crashes. The bug occurs on Windows and Linux hosts for me.

When booting the CD-ROM with "CRUX noide" it boots successfully.

As a side node, the CRUX 2.5 ISO works fine with QEMU and also on real hardware.

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