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Date: Tue, 19 Mar 2024 10:37:45 -0700
From: Zev Weiss <zev@bewilderbeest.net>
To: Helge Deller <deller@gmx.de>
Cc: "Russell King (Oracle)" <linux@armlinux.org.uk>,
	linux-parisc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	Florent Revest <revest@chromium.org>,
	"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
	"Borislav Petkov (AMD)" <bp@alien8.de>,
	Yin Fengwei <fengwei.yin@intel.com>,
	"Mike Rapoport (IBM)" <rppt@kernel.org>,
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	Stefan Roesch <shr@devkernel.io>,
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	openbmc@lists.ozlabs.org, Sam James <sam@gentoo.org>,
	stable@vger.kernel.org
Subject: Re: [PATCH RESEND 1/2] prctl: Generalize PR_SET_MDWE support check
 to be per-arch
Message-ID: <c7bb388b-2c4c-4102-9b84-278f6c6855ee@hatter.bewilderbeest.net>
References: <20240227013546.15769-4-zev@bewilderbeest.net>
 <20240227013546.15769-5-zev@bewilderbeest.net>
 <Zd24aCps4xD28c74@shell.armlinux.org.uk>
 <e391cad0-7b98-4efd-bea1-cf5ab9c626bf@gmx.de>
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In-Reply-To: <e391cad0-7b98-4efd-bea1-cf5ab9c626bf@gmx.de>

On Tue, Feb 27, 2024 at 11:53:59AM PST, Helge Deller wrote:
>On 2/27/24 11:24, Russell King (Oracle) wrote:
>>On Mon, Feb 26, 2024 at 05:35:41PM -0800, Zev Weiss wrote:
>>>There exist systems other than PARISC where MDWE may not be feasible
>>>to support; rather than cluttering up the generic code with additional
>>>arch-specific logic let's add a generic function for checking MDWE
>>>support and allow each arch to override it as needed.
>>>
>>>Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
>>>Cc: <stable@vger.kernel.org> # v6.3+
>>
>>PA-RISC folk need to ack/review-by this patch.
>
>I'm fine with patch 1/2:
>Acked-by: Helge Deller <deller@gmx.de> # parisc
>
>>Alternatively, it needs
>>to be restructured to add the arch_memory_deny_write_exec_supported()
>>override without touching the PA-RISC code, which then makes the Arm
>>patch independent of the status of the PA-RISC patch. That will allow
>>the Arm issue to be solved even if an ack is not forthcoming for the
>>PA-RISC parts.
>>>Alternatively, I wonder whether akpm would be willing to pick up this
>>patch set as-is.
>
>I have no preference, but I think both patches should be pushed
>together via arm tree or akpm.
>
>Helge

Ping...Russell, Andrew, any thoughts on how this could move forward?


Thanks,
Zev