mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 18:17:49 +07:00
21cfa0e96d
The uaccess_flushcache.c file was inadvertently dropped by the
maintainer in a previous commit. Add it back.
Fixes: 5d7bdeb1ee ("arm64: uaccess: Implement *_flushcache variants")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2017 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <asm/barrier.h>
|
|
#include <asm/cacheflush.h>
|
|
|
|
void memcpy_flushcache(void *dst, const void *src, size_t cnt)
|
|
{
|
|
/*
|
|
* We assume this should not be called with @dst pointing to
|
|
* non-cacheable memory, such that we don't need an explicit
|
|
* barrier to order the cache maintenance against the memcpy.
|
|
*/
|
|
memcpy(dst, src, cnt);
|
|
__clean_dcache_area_pop(dst, cnt);
|
|
}
|
|
EXPORT_SYMBOL_GPL(memcpy_flushcache);
|
|
|
|
void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
|
|
size_t len)
|
|
{
|
|
memcpy_flushcache(to, page_address(page) + offset, len);
|
|
}
|
|
|
|
unsigned long __copy_user_flushcache(void *to, const void __user *from,
|
|
unsigned long n)
|
|
{
|
|
unsigned long rc = __arch_copy_from_user(to, from, n);
|
|
|
|
/* See above */
|
|
__clean_dcache_area_pop(to, n - rc);
|
|
return rc;
|
|
}
|