On 9/3/20 9:32 AM, Andy Lutomirski wrote:

quoted

Taking the config register out of the init state is illogical, as is
writing to SSP while the config register is in its init state.

What's so special about the INIT state?  It's optimized by XSAVES, but
it's just a number, right?  So taking the register out of the INIT
state is kind of like saying "gdb wanted to set xmm0 to (0,0,0,1), but
it was in the INIT state to begin with", right?

Yeah, that's a good point.  The init state shouldn't be special, as the
hardware is within its right to choose not to use the init optimization
at any time.