mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 08:27:48 +07:00
c0ee37e85e
Better describe what these functions do. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright 2020, IBM Corporation.
|
|
*/
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <asm/disassemble.h>
|
|
#include <asm/inst.h>
|
|
#include <asm/ppc-opcode.h>
|
|
|
|
#ifdef CONFIG_PPC64
|
|
int probe_user_read_inst(struct ppc_inst *inst,
|
|
struct ppc_inst __user *nip)
|
|
{
|
|
unsigned int val, suffix;
|
|
int err;
|
|
|
|
err = copy_from_user_nofault(&val, nip, sizeof(val));
|
|
if (err)
|
|
return err;
|
|
if (get_op(val) == OP_PREFIX) {
|
|
err = copy_from_user_nofault(&suffix, (void __user *)nip + 4, 4);
|
|
*inst = ppc_inst_prefix(val, suffix);
|
|
} else {
|
|
*inst = ppc_inst(val);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
int probe_kernel_read_inst(struct ppc_inst *inst,
|
|
struct ppc_inst *src)
|
|
{
|
|
unsigned int val, suffix;
|
|
int err;
|
|
|
|
err = copy_from_kernel_nofault(&val, src, sizeof(val));
|
|
if (err)
|
|
return err;
|
|
if (get_op(val) == OP_PREFIX) {
|
|
err = copy_from_kernel_nofault(&suffix, (void *)src + 4, 4);
|
|
*inst = ppc_inst_prefix(val, suffix);
|
|
} else {
|
|
*inst = ppc_inst(val);
|
|
}
|
|
return err;
|
|
}
|
|
#else /* !CONFIG_PPC64 */
|
|
int probe_user_read_inst(struct ppc_inst *inst,
|
|
struct ppc_inst __user *nip)
|
|
{
|
|
unsigned int val;
|
|
int err;
|
|
|
|
err = copy_from_user_nofault(&val, nip, sizeof(val));
|
|
if (!err)
|
|
*inst = ppc_inst(val);
|
|
|
|
return err;
|
|
}
|
|
|
|
int probe_kernel_read_inst(struct ppc_inst *inst,
|
|
struct ppc_inst *src)
|
|
{
|
|
unsigned int val;
|
|
int err;
|
|
|
|
err = copy_from_kernel_nofault(&val, src, sizeof(val));
|
|
if (!err)
|
|
*inst = ppc_inst(val);
|
|
|
|
return err;
|
|
}
|
|
#endif /* CONFIG_PPC64 */
|