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Re: [PATCH 14/16] x86/alt: Adjust _alternative_instructions() to not create shadow stacks

On 02.05.2020 00:58, Andrew Cooper wrote:
> The current alternatives algorithm clears CR0.WP and writes into .text.  This
> has a side effect of the mappings becoming shadow stacks once CET is active.
> Adjust _alternative_instructions() to clean up after itself.  This involves
> extending the set of bits modify_xen_mappings() to include Dirty (and Accessed
> for good measure).
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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