From 557d0cc3f2520feba45360beeafb93203b3230e0 Mon Sep 17 00:00:00 2001 From: Varun R Mallya Date: Wed, 3 Jun 2026 02:28:46 +0530 Subject: [PATCH] selftests/bpf: use host CPU features in JIT disassembler MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Pass the host CPU name and feature string to LLVMCreateDisasmCPUFeatures() instead of using LLVMCreateDisasm(), so the disassembler correctly decodes CPU-specific instructions and extensions such as RISC-V compressed and vector instructions. Signed-off-by: Varun R Mallya Reviewed-by: Björn Töpel Link: https://lore.kernel.org/r/20260602205847.102825-2-varunrmallya@gmail.com Signed-off-by: Alexei Starovoitov --- tools/testing/selftests/bpf/jit_disasm_helpers.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/jit_disasm_helpers.c b/tools/testing/selftests/bpf/jit_disasm_helpers.c index 364c557c5115..3558fe10e28c 100644 --- a/tools/testing/selftests/bpf/jit_disasm_helpers.c +++ b/tools/testing/selftests/bpf/jit_disasm_helpers.c @@ -96,10 +96,19 @@ static int disasm_one_func(FILE *text_out, uint8_t *image, __u32 len) __u32 *label_pc, pc; int i, cnt, err = 0; char buf[64]; + char *cpu, *features; triple = LLVMGetDefaultTargetTriple(); - ctx = LLVMCreateDisasm(triple, &labels, 0, NULL, lookup_symbol); - if (!ASSERT_OK_PTR(ctx, "LLVMCreateDisasm")) { + + cpu = LLVMGetHostCPUName(); + features = LLVMGetHostCPUFeatures(); + + ctx = LLVMCreateDisasmCPUFeatures(triple, cpu, features, &labels, 0, NULL, lookup_symbol); + + LLVMDisposeMessage(cpu); + LLVMDisposeMessage(features); + + if (!ASSERT_OK_PTR(ctx, "LLVMCreateDisasmCPUFeatures")) { err = -EINVAL; goto out; }