From: Greg KH <greg@kroah.com>
To: Andrew Donnellan <ajd@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, stable@vger.kernel.org
Subject: Re: [PATCH 4.19] powerpc/powernv/idle: Restore AMR/UAMOR/AMOR after idle
Date: Wed, 15 Apr 2020 15:13:51 +0200 [thread overview]
Message-ID: <20200415131351.GB3439691@kroah.com> (raw)
In-Reply-To: <20200415124005.26920-1-ajd@linux.ibm.com>
On Wed, Apr 15, 2020 at 10:40:05PM +1000, Andrew Donnellan wrote:
> From: Michael Ellerman <mpe@ellerman.id.au>
>
> commit 53a712bae5dd919521a58d7bad773b949358add0 upstream.
>
> In order to implement KUAP (Kernel Userspace Access Protection) on
> Power9 we will be using the AMR, and therefore indirectly the
> UAMOR/AMOR.
>
> So save/restore these regs in the idle code.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
> [ajd: Backport to 4.19 tree, CVE-2020-11669]
> Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
> ---
> arch/powerpc/kernel/idle_book3s.S | 27 +++++++++++++++++++++++----
> 1 file changed, 23 insertions(+), 4 deletions(-)
This and the 4.14 patch now queued up, thanks.
greg k-h
prev parent reply other threads:[~2020-04-15 13:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 12:40 [PATCH 4.19] powerpc/powernv/idle: Restore AMR/UAMOR/AMOR after idle Andrew Donnellan
2020-04-15 13:13 ` Greg KH [this message]
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