From: Greg KH <gregkh@linuxfoundation.org>
To: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: steven.sistare@oracle.com, linux-kernel@vger.kernel.org,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
x86@kernel.org, jkosina@suse.cz, hughd@google.com,
dave.hansen@linux.intel.com, luto@kernel.org,
torvalds@linux-foundation.org
Subject: Re: [PATCH 4.9] x86/pti/efi: broken conversion from efi to kernel page table
Date: Sat, 13 Jan 2018 14:18:17 +0100 [thread overview]
Message-ID: <20180113131817.GB17515@kroah.com> (raw)
In-Reply-To: <20180111215820.29736-1-pasha.tatashin@oracle.com>
On Thu, Jan 11, 2018 at 04:58:20PM -0500, 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>
> ---
> arch/x86/include/asm/pgalloc.h | 11 +++++++++++
> arch/x86/platform/efi/efi_64.c | 2 +-
> 2 files changed, 12 insertions(+), 1 deletion(-)
Now queued up, thanks.
greg k-h
next prev parent reply other threads:[~2018-01-13 13:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-11 21:58 [PATCH 4.9] x86/pti/efi: broken conversion from efi to kernel page table Pavel Tatashin
2018-01-12 13:58 ` Ingo Molnar
2018-01-12 14:09 ` Pavel Tatashin
2018-01-12 14:27 ` Jiri Kosina
2018-01-13 13:16 ` Greg KH
2018-01-13 13:18 ` Greg KH [this message]
2018-01-13 17:12 ` Greg KH
2018-01-13 17:40 ` Pavel Tatashin
2018-01-13 18:14 ` Greg KH
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