Messages in this thread | | | Subject | Re: [PATCH 6/9] x86/mm: Introduce ptep_set_wrprotect_flush and related functions | From | Dave Hansen <> | Date | Thu, 7 Jun 2018 18:20:36 -0700 |
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On 06/07/2018 05:59 PM, Andy Lutomirski wrote: > Can you ask the architecture folks to clarify the situation? And, if > your notes are indeed correct, don't we need code to handle spurious > faults?
I'll double check that I didn't misunderstand the situation and that it has not changed on processors with shadow stacks.
But, as far as spurious faults, wouldn't it just be a fault because we've transiently gone to Present=0? We already do that when clearing the Dirty bit, so I'm not sure that's new. We surely already handle that one.
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