Re: [PATCH RESEND 1/2] prctl: Generalize PR_SET_MDWE support check to be per-arch

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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@xxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v6.3+

PA-RISC folk need to ack/review-by this patch.

I'm fine with patch 1/2:
Acked-by: Helge Deller <deller@xxxxxx> # 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.


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


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