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[PW_SID:990539] riscv, bpf: fix reads of thread_info.cpu #759

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[PW_SID:990539] riscv, bpf: fix reads of thread_info.cpu #759

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435d82e
riscv, bpf: use lw when reading int cpu in BPF_MOV64_PERCPU_REG
radimkrcmar Aug 12, 2025
c8879ab
riscv, bpf: use lw when reading int cpu in bpf_get_smp_processor_id
radimkrcmar Aug 12, 2025
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4 changes: 2 additions & 2 deletions arch/riscv/net/bpf_jit_comp64.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1356,7 +1356,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
emit_mv(rd, rs, ctx);
#ifdef CONFIG_SMP
/* Load current CPU number in T1 */
emit_ld(RV_REG_T1, offsetof(struct thread_info, cpu),
emit_lw(RV_REG_T1, offsetof(struct thread_info, cpu),
RV_REG_TP, ctx);
/* Load address of __per_cpu_offset array in T2 */
emit_addr(RV_REG_T2, (u64)&__per_cpu_offset, extra_pass, ctx);
Expand Down Expand Up @@ -1763,7 +1763,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
*/
if (insn->src_reg == 0 && insn->imm == BPF_FUNC_get_smp_processor_id) {
/* Load current CPU number in R0 */
emit_ld(bpf_to_rv_reg(BPF_REG_0, ctx), offsetof(struct thread_info, cpu),
emit_lw(bpf_to_rv_reg(BPF_REG_0, ctx), offsetof(struct thread_info, cpu),
RV_REG_TP, ctx);
break;
}
Expand Down