diff options
| author | Oliver O'Halloran <oohall@gmail.com> | 2017-10-19 10:13:55 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-11-13 00:00:31 +0300 |
| commit | 6c44741d75a27985a0496cd58b123a58c7177108 (patch) | |
| tree | cabc19300cc31e282e8663bc071b37ab24187c00 /arch/powerpc/include/asm | |
| parent | 32ce3862af3c42a3890e99846a8d1ad8871a49f9 (diff) | |
| download | linux-6c44741d75a27985a0496cd58b123a58c7177108.tar.xz | |
powerpc/lib: Implement UACCESS_FLUSHCACHE API
Implement the architecture specific portitions of the UACCESS_FLUSHCACHE
API. This provides functions for the copy_user_flushcache iterator that
ensure that when the copy is finished the destination buffer contains
a copy of the original and that the destination buffer is clean in the
processor caches.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/string.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/uaccess.h | 5 |
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h index cc9addefb51c..2796eda17d92 100644 --- a/arch/powerpc/include/asm/string.h +++ b/arch/powerpc/include/asm/string.h @@ -11,6 +11,7 @@ #define __HAVE_ARCH_MEMCMP #define __HAVE_ARCH_MEMCHR #define __HAVE_ARCH_MEMSET16 +#define __HAVE_ARCH_MEMCPY_FLUSHCACHE extern char * strcpy(char *,const char *); extern char * strncpy(char *,const char *, __kernel_size_t); @@ -23,6 +24,7 @@ extern void * memcpy(void *,const void *,__kernel_size_t); extern void * memmove(void *,const void *,__kernel_size_t); extern int memcmp(const void *,const void *,__kernel_size_t); extern void * memchr(const void *,int,__kernel_size_t); +extern void * memcpy_flushcache(void *,const void *,__kernel_size_t); #ifdef CONFIG_PPC64 #define __HAVE_ARCH_MEMSET32 diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index e34f15e727d9..19a3f75ed610 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -356,4 +356,9 @@ static inline unsigned long clear_user(void __user *addr, unsigned long size) extern long strncpy_from_user(char *dst, const char __user *src, long count); extern __must_check long strnlen_user(const char __user *str, long n); +extern long __copy_from_user_flushcache(void *dst, const void __user *src, + unsigned size); +extern void memcpy_page_flushcache(char *to, struct page *page, size_t offset, + size_t len); + #endif /* _ARCH_POWERPC_UACCESS_H */ |