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Dave Hansen authored
One nice thing about having PKRU be XSAVE-managed is that it gets naturally exposed into the XSAVE-using ABIs. Now that XSAVE will not be used to manage PKRU, these ABIs need to be manually enabled to deal with PKRU. ptrace() uses copy_uabi_xstate_to_kernel() to collect the tracee's XSTATE. As PKRU is not in the task's XSTATE buffer, use task->thread.pkru for filling in up the ptrace buffer. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20210623121456.508770763@linutronix.de
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