On Tue, Apr 04, 2023, Sean Christopherson wrote: > This is v4 of Aaron's "Clean up the supported xfeatures" series. > > Fix a bug where KVM treats/reports XTILE_CFG as supported without > XTILE_DATA being supported if userspace queries the supported CPUID but > doesn't request access to AMX, a.k.a. XTILE_DATA. If userspace reflects > that CPUID info back into KVM, the resulting VM may use it verbatim and > attempt to shove bad data into XCR0: XTILE_CFG and XTILE_DATA must be > set/cleared as a pair in XCR0, despite being enumerated separately. > > This is effectively compile-tested only on my end. Aaron, can you give this series a quick spin (and review) to make sure it works as intended? I'd like to get this into 6.4, but I'd really like it to be tested on AMX hardware first.
