Re: [PATCH 35/35] x86/cpufeatures: Limit shadow stack to Intel CPUs

John Allen
2022-02-03T21:59:00Z

On Sun, Jan 30, 2022 at 01:18:38PM -0800, Rick Edgecombe wrote:
> Shadow stack is supported on newer AMD processors, but the kernel
> implementation has not been tested on them. Prevent basic issues from
> showing up for normal users by disabling shadow stack on all CPUs except
> Intel until it has been tested. At which point the limitation should be
> removed.

Hi Rick,

I have been testing Yu-Cheng's patchsets on AMD hardware and I am
working on testing this version now. How are you testing this new
series? I can partially test by calling the prctl enable for shadow
stack directly from a program, but I'm not sure how useful that's going
to be without the glibc support. Do you have a public repo with the
necessary glibc changes to enable shadow stack early?

Thanks,
John