cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cacheflush.h (3728B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_SH_CACHEFLUSH_H
      3#define __ASM_SH_CACHEFLUSH_H
      4
      5#include <linux/mm.h>
      6
      7/*
      8 * Cache flushing:
      9 *
     10 *  - flush_cache_all() flushes entire cache
     11 *  - flush_cache_mm(mm) flushes the specified mm context's cache lines
     12 *  - flush_cache_dup mm(mm) handles cache flushing when forking
     13 *  - flush_cache_page(mm, vmaddr, pfn) flushes a single page
     14 *  - flush_cache_range(vma, start, end) flushes a range of pages
     15 *
     16 *  - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
     17 *  - flush_icache_range(start, end) flushes(invalidates) a range for icache
     18 *  - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
     19 *  - flush_cache_sigtramp(vaddr) flushes the signal trampoline
     20 */
     21extern void (*local_flush_cache_all)(void *args);
     22extern void (*local_flush_cache_mm)(void *args);
     23extern void (*local_flush_cache_dup_mm)(void *args);
     24extern void (*local_flush_cache_page)(void *args);
     25extern void (*local_flush_cache_range)(void *args);
     26extern void (*local_flush_dcache_page)(void *args);
     27extern void (*local_flush_icache_range)(void *args);
     28extern void (*local_flush_icache_page)(void *args);
     29extern void (*local_flush_cache_sigtramp)(void *args);
     30
     31static inline void cache_noop(void *args) { }
     32
     33extern void (*__flush_wback_region)(void *start, int size);
     34extern void (*__flush_purge_region)(void *start, int size);
     35extern void (*__flush_invalidate_region)(void *start, int size);
     36
     37extern void flush_cache_all(void);
     38extern void flush_cache_mm(struct mm_struct *mm);
     39extern void flush_cache_dup_mm(struct mm_struct *mm);
     40extern void flush_cache_page(struct vm_area_struct *vma,
     41				unsigned long addr, unsigned long pfn);
     42extern void flush_cache_range(struct vm_area_struct *vma,
     43				 unsigned long start, unsigned long end);
     44#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
     45void flush_dcache_page(struct page *page);
     46extern void flush_icache_range(unsigned long start, unsigned long end);
     47#define flush_icache_user_range flush_icache_range
     48extern void flush_icache_page(struct vm_area_struct *vma,
     49				 struct page *page);
     50extern void flush_cache_sigtramp(unsigned long address);
     51
     52struct flusher_data {
     53	struct vm_area_struct *vma;
     54	unsigned long addr1, addr2;
     55};
     56
     57#define ARCH_HAS_FLUSH_ANON_PAGE
     58extern void __flush_anon_page(struct page *page, unsigned long);
     59
     60static inline void flush_anon_page(struct vm_area_struct *vma,
     61				   struct page *page, unsigned long vmaddr)
     62{
     63	if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
     64		__flush_anon_page(page, vmaddr);
     65}
     66
     67#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
     68static inline void flush_kernel_vmap_range(void *addr, int size)
     69{
     70	__flush_wback_region(addr, size);
     71}
     72static inline void invalidate_kernel_vmap_range(void *addr, int size)
     73{
     74	__flush_invalidate_region(addr, size);
     75}
     76
     77extern void copy_to_user_page(struct vm_area_struct *vma,
     78	struct page *page, unsigned long vaddr, void *dst, const void *src,
     79	unsigned long len);
     80
     81extern void copy_from_user_page(struct vm_area_struct *vma,
     82	struct page *page, unsigned long vaddr, void *dst, const void *src,
     83	unsigned long len);
     84
     85#define flush_cache_vmap(start, end)		local_flush_cache_all(NULL)
     86#define flush_cache_vunmap(start, end)		local_flush_cache_all(NULL)
     87
     88#define flush_dcache_mmap_lock(mapping)		do { } while (0)
     89#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
     90
     91void kmap_coherent_init(void);
     92void *kmap_coherent(struct page *page, unsigned long addr);
     93void kunmap_coherent(void *kvaddr);
     94
     95#define PG_dcache_clean	PG_arch_1
     96
     97void cpu_cache_init(void);
     98
     99static inline void *sh_cacheop_vaddr(void *vaddr)
    100{
    101	if (__in_29bit_mode())
    102		vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
    103	return vaddr;
    104}
    105
    106#endif /* __ASM_SH_CACHEFLUSH_H */