f358afc52c
flush_kernel_dcache_page is a rather confusing interface that implements a
subset of flush_dcache_page by not being able to properly handle page
cache mapped pages.
The only callers left are in the exec code as all other previous callers
were incorrect as they could have dealt with page cache pages. Replace
the calls to flush_kernel_dcache_page with calls to flush_dcache_page,
which for all architectures does either exactly the same thing, can
contains one or more of the following:
1) an optimization to defer the cache flush for page cache pages not
mapped into userspace
2) additional flushing for mapped page cache pages if cache aliases
are possible
Link: https://lkml.kernel.org/r/20210712060928.4161649-7-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: Alex Shi <alexs@kernel.org>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Guo Ren <guoren@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Yoshinori Sato <ysato@users.osdn.me>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef __ABI_CSKY_CACHEFLUSH_H
|
|
#define __ABI_CSKY_CACHEFLUSH_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <asm/string.h>
|
|
#include <asm/cache.h>
|
|
|
|
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
|
|
extern void flush_dcache_page(struct page *);
|
|
|
|
#define flush_cache_mm(mm) dcache_wbinv_all()
|
|
#define flush_cache_page(vma, page, pfn) cache_wbinv_all()
|
|
#define flush_cache_dup_mm(mm) cache_wbinv_all()
|
|
|
|
#define flush_dcache_mmap_lock(mapping) xa_lock_irq(&mapping->i_pages)
|
|
#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages)
|
|
|
|
#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
|
|
static inline void flush_kernel_vmap_range(void *addr, int size)
|
|
{
|
|
dcache_wbinv_all();
|
|
}
|
|
static inline void invalidate_kernel_vmap_range(void *addr, int size)
|
|
{
|
|
dcache_wbinv_all();
|
|
}
|
|
|
|
#define ARCH_HAS_FLUSH_ANON_PAGE
|
|
static inline void flush_anon_page(struct vm_area_struct *vma,
|
|
struct page *page, unsigned long vmaddr)
|
|
{
|
|
if (PageAnon(page))
|
|
cache_wbinv_all();
|
|
}
|
|
|
|
/*
|
|
* if (current_mm != vma->mm) cache_wbinv_range(start, end) will be broken.
|
|
* Use cache_wbinv_all() here and need to be improved in future.
|
|
*/
|
|
extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
|
|
#define flush_cache_vmap(start, end) cache_wbinv_all()
|
|
#define flush_cache_vunmap(start, end) cache_wbinv_all()
|
|
|
|
#define flush_icache_page(vma, page) do {} while (0);
|
|
#define flush_icache_range(start, end) cache_wbinv_range(start, end)
|
|
#define flush_icache_mm_range(mm, start, end) cache_wbinv_range(start, end)
|
|
#define flush_icache_deferred(mm) do {} while (0);
|
|
|
|
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
|
|
do { \
|
|
memcpy(dst, src, len); \
|
|
} while (0)
|
|
|
|
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
|
|
do { \
|
|
memcpy(dst, src, len); \
|
|
cache_wbinv_all(); \
|
|
} while (0)
|
|
|
|
#endif /* __ABI_CSKY_CACHEFLUSH_H */
|