
AMD CPUs featuring a shortcut to access CR8 even from 32-bit mode. If you use the LOCK prefix with "mov CR0", it accesses CR8 instead. This behavior is guarded by the CR8_LEGACY CPUID bit (Fn8000_0001:ECX[1]). Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Read the documentation in qemu-doc.html. Fabrice Bellard.
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