Messages in this thread | | | Date | Tue, 23 Nov 2021 08:18:31 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH Part2 v5 00/45] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support |
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On Mon, Nov 22, 2021 at 02:51:35PM -0800, Dave Hansen wrote: > By "supporting", do you mean doing something functional? I don't really > care if ptrace() to guest private memory returns -EINVAL or whatever. > The most important thing is not crashing the host. > > Also, as Sean mentioned, this isn't really about ptrace() itself. It's > really about ensuring that no kernel or devices accesses to guest > private memory can induce bad behavior.
I keep repeating this suggestion of mine that we should treat guest-private pages as hw-poisoned pages which have experienced a uncorrectable error in the past.
mm already knows how to stay away from those.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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