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From:   Scott Wood <oss@buserror.net>
To:     Jason Yan <yanaijie@huawei.com>, mpe@ellerman.id.au,
        linuxppc-dev@lists.ozlabs.org, diana.craciun@nxp.com,
        christophe.leroy@c-s.fr, benh@kernel.crashing.org,
        paulus@samba.org, npiggin@gmail.com, keescook@chromium.org,
        kernel-hardening@lists.openwall.com
Cc:     linux-kernel@vger.kernel.org, zhaohongjiang@huawei.com,
        dja@axtens.net
Date:   Fri, 20 Mar 2020 00:08:53 -0500
In-Reply-To: <20200306064033.3398-7-yanaijie@huawei.com>
References: <20200306064033.3398-1-yanaijie@huawei.com>
         <20200306064033.3398-7-yanaijie@huawei.com>
Organization: Red Hat
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Subject: Re: [PATCH v4 6/6] powerpc/fsl_booke/kaslr: rename
 kaslr-booke32.rst to kaslr-booke.rst and add 64bit part
Sender: linux-kernel-owner@vger.kernel.org
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On Fri, 2020-03-06 at 14:40 +0800, Jason Yan wrote:
> @@ -38,5 +41,29 @@ bit of the entropy to decide the index of the 64M zone.
> Then we chose a
>  
>                                kernstart_virt_addr
>  
> +
> +KASLR for Freescale BookE64
> +---------------------------
> +
> +The implementation for Freescale BookE64 is similar as BookE32. One

similar to

> +difference is that Freescale BookE64 set up a TLB mapping of 1G during
> +booting. Another difference is that ppc64 needs the kernel to be
> +64K-aligned. So we can randomize the kernel in this 1G mapping and make
> +it 64K-aligned. This can save some code to creat another TLB map at early

create

-Scott