Messages in this thread | | | Date | Fri, 12 Jan 2018 15:27:32 +0100 (CET) | From | Jiri Kosina <> | Subject | Re: [PATCH 4.9] x86/pti/efi: broken conversion from efi to kernel page table |
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On Thu, 11 Jan 2018, Pavel Tatashin wrote:
> The page table order must be increased for EFI table in order to avoid a > bug where NMI tries to change the page table to kernel page table, while > efi page table is active. > > For more disccussion about this bug, see this thread: > http://lkml.iu.edu/hypermail/linux/kernel/1801.1/00951.html > > Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> > Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
We are carrying similar patch in our 4.4 codestream as well.
Please note that this is needed only for those trees that have 67a9108ed43 ("x86/efi: Build our own page table structures") backported to it. That used to be in some -stable releases, and some had it reverted, so please check that.
-- Jiri Kosina SUSE Labs
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