The XSAVE feature set extends the functionality of the FXSAVE and FXRSTOR instructions (see Intel SDM Vol. 1: 13 Managing State using the XSAVE Feature Set). Some current features, such as AVX, will only work properly if the XSAVE feature is enabled.
Enabling XSAVE feature allows the guest OS with AVX (or other XSAVE-supported features) enabled can boot normally.
The XSAVE feature set extends the functionality of the FXSAVE and FXRSTOR instructions (see Intel SDM Vol. 1: 13 Managing State using the XSAVE Feature Set). Some current features, such as AVX, will only work properly if the XSAVE feature is enabled.
Enabling XSAVE feature allows the guest OS with AVX (or other XSAVE-supported features) enabled can boot normally.