Thanks for that information Jim.
On Intel Xeon, ESX- 4.1 we have observed the following,
With VT-x disabled in BIOS, 'cat /proc/cpuinfo | grep lm' in the CentOS 32 bit guest has no output
With VT-x enabled in BIOS, 'cat /proc/cpuinfo | grep lm' in the CentOS 32 bit guest shows the lm flag
The above test suggests that if VT-x is enabled in BIOS, ESX will pass a 'lm' flag to an existing 32 bit guest which indirectly means that it is capable of booting a 64-bit guest without
any changes to host BIOS.
Do you think this test would produce the same results across different ESX versions, across all other hardware platforms (AMD, and others)?