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Date: Thu, 8 Jun 2017 17:09:41 +0100
From: Russell King - ARM Linux <linux@armlinux.org.uk>
To: Yisheng Xie <xieyisheng1@huawei.com>
Cc: matthias.bgg@gmail.com, viro@zeniv.linux.org.uk, nico@linaro.org,
        catalin.marinas@arm.com, will.deacon@arm.com, guohanjun@huawei.com,
        wangfangpeng1@huawei.com, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ARM/Kconfig: make VMSPLIT_3G_OPT depends on !ARM_LPAE
Message-ID: <20170608160941.GN4902@n2100.armlinux.org.uk>
References: <1496901944-42140-1-git-send-email-xieyisheng1@huawei.com>
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On Thu, Jun 08, 2017 at 02:05:44PM +0800, Yisheng Xie wrote:
> When both enable CONFIG_ARM_LPAE=y and CONFIG_VMSPLIT_3G_OPT=y, which
> means use PAGE_OFFSET=0xB0000000 with ARM_LPAE, the kernel will boot
> fail and stop after uncompressed:
> 
>    Starting kernel ...
> 
>    Uart base = 0x20001000
>    watchdog reg = 0x20013000
>    dtb addr = 0x80840308
>    Uncompressing Linux... done, booting the kernel.
> 
> For ARM_LPAE only support 3:1, 2:2, 1:3 split of TTBR1, which mention in:
>    http://elinux.org/images/6/6a/Elce11_marinas.pdf - p16
> 
> So we should make VMSPLIT_3G_OPT depends on !ARM_LPAE to avoid trigger
> this bug.

Yes, this is much more preferable.  Please drop it into the patch system,
thanks.

-- 
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