From: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@ozlabs.org, npiggin@gmail.com
Subject: Re: [PATCH v5 02/10] powerpc/powernv/idle: Restore AMR/UAMOR/AMOR after idle
Date: Wed, 13 Mar 2019 13:46:30 +0530 [thread overview]
Message-ID: <20190313081630.GB4047@aks.ibm> (raw)
In-Reply-To: <20190308011619.22402-2-mpe@ellerman.id.au>
On Fri, Mar 08, 2019 at 12:16:11PM +1100, Michael Ellerman wrote:
> 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>
> ---
> v5: Unchanged.
> v4: New.
>
> arch/powerpc/kernel/idle_book3s.S | 27 +++++++++++++++++++++++----
> 1 file changed, 23 insertions(+), 4 deletions(-)
Opps.. i posted a comment on the v4.
It would be good if we can make AMOR/UAMOR/AMR save-restore
code power9 only.
next prev parent reply other threads:[~2019-03-13 8:18 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-08 1:16 [PATCH v5 01/10] powerpc/powernv/idle: Restore IAMR after idle Michael Ellerman
2019-03-08 1:16 ` [PATCH v5 02/10] powerpc/powernv/idle: Restore AMR/UAMOR/AMOR " Michael Ellerman
2019-03-13 8:16 ` Akshay Adiga [this message]
2019-03-20 12:58 ` Michael Ellerman
2019-03-08 1:16 ` [PATCH v5 03/10] powerpc: Add framework for Kernel Userspace Protection Michael Ellerman
2019-03-08 1:16 ` [PATCH v5 04/10] powerpc: Add skeleton for Kernel Userspace Execution Prevention Michael Ellerman
2019-03-08 1:16 ` [PATCH v5 05/10] powerpc: Add a framework for Kernel Userspace Access Protection Michael Ellerman
2019-03-08 8:26 ` Christophe Leroy
2019-03-20 12:57 ` Michael Ellerman
2019-03-20 13:04 ` Christophe Leroy
2019-03-21 10:21 ` Christophe Leroy
2019-03-22 0:35 ` Michael Ellerman
2019-03-11 9:12 ` Christophe Leroy
2019-03-08 1:16 ` [PATCH v5 06/10] powerpc/64: Setup KUP on secondary CPUs Michael Ellerman
2019-03-08 1:16 ` [PATCH v5 07/10] powerpc/mm/radix: Use KUEP API for Radix MMU Michael Ellerman
2019-03-08 1:16 ` [PATCH v5 08/10] powerpc/lib: Refactor __patch_instruction() to use __put_user_asm() Michael Ellerman
2019-03-08 8:32 ` Christophe Leroy
2019-03-08 1:16 ` [PATCH v5 09/10] powerpc/64s: Implement KUAP for Radix MMU Michael Ellerman
2019-03-08 8:48 ` Christophe Leroy
2019-04-17 13:39 ` Michael Ellerman
2019-03-08 1:16 ` [PATCH v5 10/10] powerpc/mm: Detect bad KUAP faults Michael Ellerman
2019-03-08 8:53 ` Christophe Leroy
2019-03-09 12:49 ` christophe leroy
2019-04-17 13:17 ` Michael Ellerman
2019-04-17 13:12 ` Michael Ellerman
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