Re: [RFC PATCH 6/9] arm64: Enable the execmem ROX cache for module text

Adrian Barnaś <[email protected]>
Newsgroups gmane.linux.kernel.modules,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.kernel.mm
Message-ID <[email protected]> 
On Sat, Aug 22, 2026 at 03:53:28PM +0200, Ard Biesheuvel wrote:
>From: Ard Biesheuvel <[email protected]>
>
>Wire up the existing support for the execmem ROX cache on arm64, so that
>it will be used for module .text and .init.text regions. This will be
>relied upon by a subsequent patch in order to allocate those regions
>from a single chunk of memory.
>

Until Mike lands his changes [1] on set_direct_map, enabling ROX_CACHE on  
ARM64 would cause a permission fault when the same part of the direct map is
used again (the RO flag is not properly stripped off after an execmem cache
clean).                                                                    
                                                                            
[1]: https://lore.kernel.org/all/20260823-execmem-set-vm-perms-v0-2-v2-0-b013a37d84b3-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org/
                                                                            
Best regards,                                                              
Adrian
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