Pawel Dziepak a5b070f1fa x86: Store pointer to the current thread in gs:0 ...

Apparently, reading from dr3 is slower than reading from memory
with cache hit.

Also, depending on hypervisor configuration, accessing dr3 may cause
a VM exit (and, at least on kvm, it does), what makes it much slower
than a memory access even when there is a cache miss.

2013-12-17 04:08:51 +01:00

..

descriptors.h

x86: Store pointer to the current thread in gs:0

2013-12-17 04:08:51 +01:00

iframe.h

x86: Let each CPU have its own GDT

2013-12-17 03:57:20 +01:00