Re: [PATCH v5 7/8] execmem: add support for cache of large ROX pages

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On Wed, Oct 09, 2024 at 11:58:33PM -0700, Christoph Hellwig wrote:
On Wed, Oct 09, 2024 at 09:08:15PM +0300, Mike Rapoport wrote:
 /**
  * struct execmem_info - architecture parameters for code allocations
+ * @fill_trapping_insns: set memory to contain instructions that will trap
  * @ranges: array of parameter sets defining architecture specific
  * parameters for executable memory allocations. The ranges that are not
  * explicitly initialized by an architecture use parameters defined for
  * @EXECMEM_DEFAULT.
  */
 struct execmem_info {
+	void (*fill_trapping_insns)(void *ptr, size_t size, bool writable);
 	struct execmem_range	ranges[EXECMEM_TYPE_MAX];

Why is the filler an indirect function call and not an architecture
hook?

The idea is to keep everything together and have execmem_info describe all
that architecture needs. 

-- 
Sincerely yours,
Mike.




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