From: Peter Collingbourne <pcc@google.com>
Date: Tue, 3 Mar 2026 23:00:54 +0000 (-0800)
Subject: perf annotate: Specify llvm features="+all" for aarch64
X-Git-Tag: v7.1-rc1~91^2~112
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b1718b0367ba31e8db273e3896ebd1707bcbe59e;p=thirdparty%2Fkernel%2Flinux.git

perf annotate: Specify llvm features="+all" for aarch64

This is consistent with what llvm-objdump does (see [1]) and allows
the LLVM disassembler to disassemble instructions not in the base
instruction set.

[1] https://reviews.llvm.org/D127741

Link: https://linux-review.googlesource.com/id/I52e4fef18d2e12b45f875231fa9d3efff2538fd4
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---

diff --git a/tools/perf/util/llvm.c b/tools/perf/util/llvm.c
index 0d126d233c019..a0deb742a7331 100644
--- a/tools/perf/util/llvm.c
+++ b/tools/perf/util/llvm.c
@@ -153,11 +153,17 @@ int symbol__disassemble_llvm(const char *filename, struct symbol *sym,
 					  /*get_op_info=*/NULL, symbol_lookup_callback);
 	} else {
 		char triplet[64];
+		const char *features = NULL;
 
 		scnprintf(triplet, sizeof(triplet), "%s-linux-gnu",
 			  args->arch->name);
-		disasm = LLVMCreateDisasm(triplet, &storage, /*tag_type=*/0,
-					  /*get_op_info=*/NULL, symbol_lookup_callback);
+		if (args->arch->id.e_machine == EM_AARCH64)
+			features = "+all";
+		disasm = LLVMCreateDisasmCPUFeatures(triplet, /*cpu=*/"",
+						     features, &storage,
+						     /*tag_type=*/0,
+						     /*get_op_info=*/NULL,
+						     symbol_lookup_callback);
 	}
 
 	if (disasm == NULL)