linux-kernel - [PATCH] perf/util: make TYPE_STATE_MAX

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Message-Id: <20250728115719.143372-1-suchitkarunakaran@gmail.com>
Date: Mon, 28 Jul 2025 17:27:19 +0530
From: Suchit Karunakaran <suchitkarunakaran@...il.com>
To: peterz@...radead.org,
	mingo@...hat.com,
	acme@...nel.org,
	namhyung@...nel.org,
	mark.rutland@....com,
	alexander.shishkin@...ux.intel.com,
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	adrian.hunter@...el.com,
	kan.liang@...ux.intel.com,
	paul.walmsley@...ive.com,
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	aou@...s.berkeley.edu,
	alex@...ti.fr,
	guoren@...nel.org,
	atrajeev@...ux.vnet.ibm.com,
	kjain@...ux.ibm.com,
	linux-perf-users@...r.kernel.org
Cc: linux-riscv@...ts.infradead.org,
	linux-csky@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-kernel-mentees@...ts.linux.dev,
	skhan@...uxfoundation.org,
	Suchit Karunakaran <suchitkarunakaran@...il.com>
Subject: [PATCH] perf/util: make TYPE_STATE_MAX_REGS architecture-dependent

Replace the fixed definition of TYPE_STATE_MAX_REGS with architecture-
specific values for better accuracy across multiple CPU architectures
including PowerPC, ARM, x86, RISC-V, MIPS, and others. This change ensures
the type state registers array size matches the actual register count of
the target platform.

Signed-off-by: Suchit Karunakaran <suchitkarunakaran@...il.com>
---
 tools/perf/util/annotate-data.h | 45 ++++++++++++++++++++++++++++++---
 1 file changed, 41 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/annotate-data.h b/tools/perf/util/annotate-data.h
index 541fee1a5f0a..0dfb12a8f1cc 100644
--- a/tools/perf/util/annotate-data.h
+++ b/tools/perf/util/annotate-data.h
@@ -189,11 +189,48 @@ struct type_state_stack {
 	u8 kind;
 };
 
-/* FIXME: This should be arch-dependent */
-#ifdef __powerpc__
-#define TYPE_STATE_MAX_REGS  32
+#if defined(__powerpc__) || defined(__powerpc64__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__aarch64__)
+#define TYPE_STATE_MAX_REGS 31
+#elif defined(__arm__)
+#define TYPE_STATE_MAX_REGS 16
+#elif defined(__x86_64__)
+#define TYPE_STATE_MAX_REGS 16
+#elif defined(__i386__)
+#define TYPE_STATE_MAX_REGS 8
+#elif defined(__riscv)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__mips__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__sparc__) || defined(__sparc64__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__alpha__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__s390__) || defined(__s390x__)
+#define TYPE_STATE_MAX_REGS 16
+#elif defined(__sh__)
+#define TYPE_STATE_MAX_REGS 16
+#elif defined(__nios2__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__hexagon__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__openrisc__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__csky__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__loongarch__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__arc__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__microblaze__)
+#define TYPE_STATE_MAX_REGS 32
+#elif defined(__xtensa__)
+#define TYPE_STATE_MAX_REGS 16
+#elif defined(__m68k__)
+#define TYPE_STATE_MAX_REGS 16
 #else
-#define TYPE_STATE_MAX_REGS  16
+#define TYPE_STATE_MAX_REGS 16
 #endif
 
 /*
-- 
2.39.5