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// 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>
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 (IS_ENABLED(CONFIG_PPC64) && 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;
}
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