On Thu, 2023-09-14 at 02:33 -0400, Yang Weijiang wrote: > Fix guest xsave area allocation size from fpu_user_cfg.default_size > to > fpu_kernel_cfg.default_size so that the xsave area size is consistent > with fpstate->size set in __fpstate_reset(). > > With the fix, guest fpstate size is sufficient for KVM supported > guest > xfeatures. > > Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx> There is no fix (Fixes: ...) here, right? I think this change is needed to make sure KVM guests can support supervisor features. But KVM CET support (to follow in future patches) will be the first one, right? The side effect will be that KVM guest FPUs now get guaranteed room for PASID as well as CET. I think I remember you mentioned that due to alignment requirements, there shouldn't usually be any size change though? It might be nice to add that in the log, if I'm remembering correctly.
