[v6] x86/module: use large ROX pages for text allocations

[PATCH v6 1/8] mm: vmalloc: group declarations depending on CONFIG_MMU together

Posted by Mike Rapoport 1 month, 1 week ago

From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>

There are a couple of declarations that depend on CONFIG_MMU in
include/linux/vmalloc.h spread all over the file.

Group them all together to improve code readability.

No functional changes.

Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/vmalloc.h | 60 +++++++++++++++++------------------------
 1 file changed, 24 insertions(+), 36 deletions(-)

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index ad2ce7a6ab7a..27408f21e501 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -134,12 +134,6 @@ extern void vm_unmap_ram(const void *mem, unsigned int count);
 extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
 extern void vm_unmap_aliases(void);
 
-#ifdef CONFIG_MMU
-extern unsigned long vmalloc_nr_pages(void);
-#else
-static inline unsigned long vmalloc_nr_pages(void) { return 0; }
-#endif
-
 extern void *vmalloc_noprof(unsigned long size) __alloc_size(1);
 #define vmalloc(...)		alloc_hooks(vmalloc_noprof(__VA_ARGS__))
 
@@ -266,12 +260,29 @@ static inline bool is_vm_area_hugepages(const void *addr)
 #endif
 }
 
+/* for /proc/kcore */
+long vread_iter(struct iov_iter *iter, const char *addr, size_t count);
+
+/*
+ *	Internals.  Don't use..
+ */
+__init void vm_area_add_early(struct vm_struct *vm);
+__init void vm_area_register_early(struct vm_struct *vm, size_t align);
+
+int register_vmap_purge_notifier(struct notifier_block *nb);
+int unregister_vmap_purge_notifier(struct notifier_block *nb);
+
 #ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+
+unsigned long vmalloc_nr_pages(void);
+
 int vm_area_map_pages(struct vm_struct *area, unsigned long start,
 		      unsigned long end, struct page **pages);
 void vm_area_unmap_pages(struct vm_struct *area, unsigned long start,
 			 unsigned long end);
 void vunmap_range(unsigned long addr, unsigned long end);
+
 static inline void set_vm_flush_reset_perms(void *addr)
 {
 	struct vm_struct *vm = find_vm_area(addr);
@@ -279,24 +290,14 @@ static inline void set_vm_flush_reset_perms(void *addr)
 	if (vm)
 		vm->flags |= VM_FLUSH_RESET_PERMS;
 }
+#else  /* !CONFIG_MMU */
+#define VMALLOC_TOTAL 0UL
 
-#else
-static inline void set_vm_flush_reset_perms(void *addr)
-{
-}
-#endif
-
-/* for /proc/kcore */
-extern long vread_iter(struct iov_iter *iter, const char *addr, size_t count);
-
-/*
- *	Internals.  Don't use..
- */
-extern __init void vm_area_add_early(struct vm_struct *vm);
-extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
+static inline unsigned long vmalloc_nr_pages(void) { return 0; }
+static inline void set_vm_flush_reset_perms(void *addr) {}
+#endif /* CONFIG_MMU */
 
-#ifdef CONFIG_SMP
-# ifdef CONFIG_MMU
+#if defined(CONFIG_MMU) && defined(CONFIG_SMP)
 struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
 				     const size_t *sizes, int nr_vms,
 				     size_t align);
@@ -311,22 +312,9 @@ pcpu_get_vm_areas(const unsigned long *offsets,
 	return NULL;
 }
 
-static inline void
-pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
-{
-}
-# endif
-#endif
-
-#ifdef CONFIG_MMU
-#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
-#else
-#define VMALLOC_TOTAL 0UL
+static inline void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) {}
 #endif
 
-int register_vmap_purge_notifier(struct notifier_block *nb);
-int unregister_vmap_purge_notifier(struct notifier_block *nb);
-
 #if defined(CONFIG_MMU) && defined(CONFIG_PRINTK)
 bool vmalloc_dump_obj(void *object);
 #else
-- 
2.43.0

Re: [PATCH v6 1/8] mm: vmalloc: group declarations depending on CONFIG_MMU together

Posted by Luis Chamberlain 1 month, 1 week ago

On Wed, Oct 16, 2024 at 03:24:17PM +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
> 
> There are a couple of declarations that depend on CONFIG_MMU in
> include/linux/vmalloc.h spread all over the file.
> 
> Group them all together to improve code readability.
> 
> No functional changes.
> 
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>

Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>

  Luis

Re: [PATCH v6 1/8] mm: vmalloc: group declarations depending on CONFIG_MMU together

Posted by Uladzislau Rezki 1 month, 1 week ago

On Wed, Oct 16, 2024 at 03:24:17PM +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
> 
> There are a couple of declarations that depend on CONFIG_MMU in
> include/linux/vmalloc.h spread all over the file.
> 
> Group them all together to improve code readability.
> 
> No functional changes.
> 
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> ---
>  include/linux/vmalloc.h | 60 +++++++++++++++++------------------------
>  1 file changed, 24 insertions(+), 36 deletions(-)
> 
> diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
> index ad2ce7a6ab7a..27408f21e501 100644
> --- a/include/linux/vmalloc.h
> +++ b/include/linux/vmalloc.h
> @@ -134,12 +134,6 @@ extern void vm_unmap_ram(const void *mem, unsigned int count);
>  extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
>  extern void vm_unmap_aliases(void);
>  
> -#ifdef CONFIG_MMU
> -extern unsigned long vmalloc_nr_pages(void);
> -#else
> -static inline unsigned long vmalloc_nr_pages(void) { return 0; }
> -#endif
> -
>  extern void *vmalloc_noprof(unsigned long size) __alloc_size(1);
>  #define vmalloc(...)		alloc_hooks(vmalloc_noprof(__VA_ARGS__))
>  
> @@ -266,12 +260,29 @@ static inline bool is_vm_area_hugepages(const void *addr)
>  #endif
>  }
>  
> +/* for /proc/kcore */
> +long vread_iter(struct iov_iter *iter, const char *addr, size_t count);
> +
> +/*
> + *	Internals.  Don't use..
> + */
> +__init void vm_area_add_early(struct vm_struct *vm);
> +__init void vm_area_register_early(struct vm_struct *vm, size_t align);
> +
> +int register_vmap_purge_notifier(struct notifier_block *nb);
> +int unregister_vmap_purge_notifier(struct notifier_block *nb);
> +
>  #ifdef CONFIG_MMU
> +#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
> +
> +unsigned long vmalloc_nr_pages(void);
> +
>  int vm_area_map_pages(struct vm_struct *area, unsigned long start,
>  		      unsigned long end, struct page **pages);
>  void vm_area_unmap_pages(struct vm_struct *area, unsigned long start,
>  			 unsigned long end);
>  void vunmap_range(unsigned long addr, unsigned long end);
> +
>  static inline void set_vm_flush_reset_perms(void *addr)
>  {
>  	struct vm_struct *vm = find_vm_area(addr);
> @@ -279,24 +290,14 @@ static inline void set_vm_flush_reset_perms(void *addr)
>  	if (vm)
>  		vm->flags |= VM_FLUSH_RESET_PERMS;
>  }
> +#else  /* !CONFIG_MMU */
> +#define VMALLOC_TOTAL 0UL
>  
> -#else
> -static inline void set_vm_flush_reset_perms(void *addr)
> -{
> -}
> -#endif
> -
> -/* for /proc/kcore */
> -extern long vread_iter(struct iov_iter *iter, const char *addr, size_t count);
> -
> -/*
> - *	Internals.  Don't use..
> - */
> -extern __init void vm_area_add_early(struct vm_struct *vm);
> -extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
> +static inline unsigned long vmalloc_nr_pages(void) { return 0; }
> +static inline void set_vm_flush_reset_perms(void *addr) {}
> +#endif /* CONFIG_MMU */
>  
> -#ifdef CONFIG_SMP
> -# ifdef CONFIG_MMU
> +#if defined(CONFIG_MMU) && defined(CONFIG_SMP)
>  struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
>  				     const size_t *sizes, int nr_vms,
>  				     size_t align);
> @@ -311,22 +312,9 @@ pcpu_get_vm_areas(const unsigned long *offsets,
>  	return NULL;
>  }
>  
> -static inline void
> -pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
> -{
> -}
> -# endif
> -#endif
> -
> -#ifdef CONFIG_MMU
> -#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
> -#else
> -#define VMALLOC_TOTAL 0UL
> +static inline void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) {}
>  #endif
>  
> -int register_vmap_purge_notifier(struct notifier_block *nb);
> -int unregister_vmap_purge_notifier(struct notifier_block *nb);
> -
>  #if defined(CONFIG_MMU) && defined(CONFIG_PRINTK)
>  bool vmalloc_dump_obj(void *object);
>  #else
> -- 
> 2.43.0
> 
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>

--
Uladzislau Rezki

[PATCH v6 1/8] mm: vmalloc: group declarations depending on CONFIG_MMU together
[PATCH v6 2/8] mm: vmalloc: don't account for number of nodes for HUGE_VMAP allocations
[PATCH v6 3/8] asm-generic: introduce text-patching.h
[PATCH v6 4/8] module: prepare to handle ROX allocations for text
[PATCH v6 5/8] arch: introduce set_direct_map_valid_noflush()
[PATCH v6 6/8] x86/module: prepare module loading for ROX allocations of text
[PATCH v6 7/8] execmem: add support for cache of large ROX pages
[PATCH v6 8/8] x86/module: enable ROX caches for module text on 64 bit