On 5/3/2022 3:06 am, Jim Mattson wrote:
We should continue to synthesize a #GP for an attempt to set "must be
zero" bits or for rule violations, like "address must be canonical."
Actually, I do stand in the same position as you.
However, we have absolutely no business making up our own hardware
specification. This is a bug, and it should be fixed, like any other
bug.
Current virtual hardware interfaces do not strictly comply with vendor
specifications
and may not be the same in the first step of enablement, or some of them may have
to be compromised later out of various complexity.
The behavior of AMD's "synthesize a #GP" to "reserved without qualification" bits
is clearly a legacy tech decision (not sure if it was intentional). We may need
a larger
independent patch set to apply this one-time surgery, including of course this
pmu issue.
What do you think ?
