Re: [PATCH v5 04/13] x86/xsaves: Introduce a new check that allows correct xstates copy from kernel to user directly

[Dave Hansen]

On 05/09/2016 01:46 PM, Yu-cheng Yu wrote:
> XSAVES is a kernel instruction and uses a compacted format. When working
> with user space, the kernel should provide standard-format, non-supervisor
> state data. We cannot do __copy_to_user() from a compacted- format kernel
> xstate area to a signal frame.

Looks good now:

Reviewed-by: Dave Hansen <dave.han...@intel.com>