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30 lines
717 B
30 lines
717 B
// SPDX-License-Identifier: GPL-2.0-only |
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#include <linux/uaccess.h> |
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#include <linux/kernel.h> |
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#include <asm/disassemble.h> |
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#include <asm/inst.h> |
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#include <asm/ppc-opcode.h> |
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bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) |
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{ |
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return is_kernel_addr((unsigned long)unsafe_src); |
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} |
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int copy_inst_from_kernel_nofault(struct ppc_inst *inst, u32 *src) |
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{ |
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unsigned int val, suffix; |
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int err; |
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err = copy_from_kernel_nofault(&val, src, sizeof(val)); |
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if (err) |
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return err; |
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if (IS_ENABLED(CONFIG_PPC64) && get_op(val) == OP_PREFIX) { |
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err = copy_from_kernel_nofault(&suffix, src + 1, sizeof(suffix)); |
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*inst = ppc_inst_prefix(val, suffix); |
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} else { |
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*inst = ppc_inst(val); |
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} |
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return err; |
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}
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