LoongArch: Move three functions from kprobes.c to inst.c

The three functions insns_not_supported(), insns_need_simulation() and
arch_simulate_insn() will be used for uprobes, move them from kprobes.c
to inst.c, this is preparation for later patch, no functionality change.

Tested-by: Jeff Xie <xiehuan09@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

1 files changed, 2 insertions, 44 deletions

diff --git a/arch/loongarch/kernel/kprobes.c b/arch/loongarch/kernel/kprobes.c
index 83467232ca3c..4c13c4431b67 100644
--- a/arch/loongarch/kernel/kprobes.c
+++ b/arch/loongarch/kernel/kprobes.c
@@ -21,48 +21,6 @@ static const union loongarch_instruction singlestep_insn = {
 DEFINE_PER_CPU(struct kprobe *, current_kprobe);
 DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
 
-static bool insns_not_supported(union loongarch_instruction insn)
-{
-	switch (insn.reg2i14_format.opcode) {
-	case llw_op:
-	case lld_op:
-	case scw_op:
-	case scd_op:
-		pr_notice("kprobe: ll and sc instructions are not supported\n");
-		return true;
-	}
-
-	switch (insn.reg1i21_format.opcode) {
-	case bceqz_op:
-		pr_notice("kprobe: bceqz and bcnez instructions are not supported\n");
-		return true;
-	}
-
-	return false;
-}
-NOKPROBE_SYMBOL(insns_not_supported);
-
-static bool insns_need_simulation(struct kprobe *p)
-{
-	if (is_pc_ins(&p->opcode))
-		return true;
-
-	if (is_branch_ins(&p->opcode))
-		return true;
-
-	return false;
-}
-NOKPROBE_SYMBOL(insns_need_simulation);
-
-static void arch_simulate_insn(struct kprobe *p, struct pt_regs *regs)
-{
-	if (is_pc_ins(&p->opcode))
-		simu_pc(regs, p->opcode);
-	else if (is_branch_ins(&p->opcode))
-		simu_branch(regs, p->opcode);
-}
-NOKPROBE_SYMBOL(arch_simulate_insn);
-
 static void arch_prepare_ss_slot(struct kprobe *p)
 {
 	p->ainsn.insn[0] = *p->addr;
@@ -89,7 +47,7 @@ int arch_prepare_kprobe(struct kprobe *p)
 	if (insns_not_supported(p->opcode))
 		return -EINVAL;
 
-	if (insns_need_simulation(p)) {
+	if (insns_need_simulation(p->opcode)) {
 		p->ainsn.insn = NULL;
 	} else {
 		p->ainsn.insn = get_insn_slot();
@@ -220,7 +178,7 @@ static void setup_singlestep(struct kprobe *p, struct pt_regs *regs,
 		regs->csr_era = (unsigned long)p->ainsn.insn;
 	} else {
 		/* simulate single steping */
-		arch_simulate_insn(p, regs);
+		arch_simulate_insn(p->opcode, regs);
 		/* now go for post processing */
 		post_kprobe_handler(p, kcb, regs);
 	}