From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001
From: Kees Cook <kees+treewide@kernel.org>
Date: Wed, 2 Sep 2026 15:31:14 -0700
Subject: treewide: refresh kmalloc_obj() conversions

This is another run of the Coccinelle script for converting kmalloc()
family of allocations to kmalloc_obj() via the existing rules in
scripts/coccinelle/api/kmalloc_objs.cocci

This catches both the set of kmalloc() uses added since the first
kmalloc_obj() conversions in v7.0 and adds a large group missed in the
first pass due to Coccinelle not interacting well with the cleanup.h
scoped_...() family of macros[1]. I worked around this with spatch's
"--macro-file" argument to a file with all the scoped_...() macros mapped
to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control
flow indicator I could find.

Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc,
riscv, and s390 with no new warnings.

Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1]
Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2]
Signed-off-by: Kees Cook <kees+treewide@kernel.org>
---
 drivers/soc/tegra/ari-tegra186.c | 80 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 drivers/soc/tegra/ari-tegra186.c

(limited to 'drivers/soc/tegra/ari-tegra186.c')

diff --git a/drivers/soc/tegra/ari-tegra186.c b/drivers/soc/tegra/ari-tegra186.c
new file mode 100644
index 000000000..02577853e
--- /dev/null
+++ b/drivers/soc/tegra/ari-tegra186.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+ */
+
+#include <linux/arm-smccc.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/panic_notifier.h>
+
+#define SMC_SIP_INVOKE_MCE			0xc2ffff00
+#define MCE_SMC_READ_MCA			12
+
+#define MCA_ARI_CMD_RD_SERR			1
+
+#define MCA_ARI_RW_SUBIDX_STAT			1
+#define SERR_STATUS_VAL				BIT_ULL(63)
+
+#define MCA_ARI_RW_SUBIDX_ADDR			2
+#define MCA_ARI_RW_SUBIDX_MSC1			3
+#define MCA_ARI_RW_SUBIDX_MSC2			4
+
+static const char * const bank_names[] = {
+	"SYS:DPMU", "ROC:IOB", "ROC:MCB", "ROC:CCE", "ROC:CQX", "ROC:CTU",
+};
+
+static void read_uncore_mca(u8 cmd, u8 idx, u8 subidx, u8 inst, u64 *data)
+{
+	struct arm_smccc_res res;
+
+	arm_smccc_smc(SMC_SIP_INVOKE_MCE | MCE_SMC_READ_MCA,
+		      ((u64)inst << 24) | ((u64)idx << 16) |
+			      ((u64)subidx << 8) | ((u64)cmd << 0),
+		      0, 0, 0, 0, 0, 0, &res);
+
+	*data = res.a2;
+}
+
+static int tegra186_ari_panic_handler(struct notifier_block *nb,
+				      unsigned long code, void *unused)
+{
+	u64 status;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(bank_names); i++) {
+		read_uncore_mca(MCA_ARI_CMD_RD_SERR, i, MCA_ARI_RW_SUBIDX_STAT,
+				0, &status);
+
+		if (status & SERR_STATUS_VAL) {
+			u64 addr, misc1, misc2;
+
+			read_uncore_mca(MCA_ARI_CMD_RD_SERR, i,
+					MCA_ARI_RW_SUBIDX_ADDR, 0, &addr);
+			read_uncore_mca(MCA_ARI_CMD_RD_SERR, i,
+					MCA_ARI_RW_SUBIDX_MSC1, 0, &misc1);
+			read_uncore_mca(MCA_ARI_CMD_RD_SERR, i,
+					MCA_ARI_RW_SUBIDX_MSC2, 0, &misc2);
+
+			pr_crit("Machine Check Error in %s\n"
+				"  status=0x%llx addr=0x%llx\n"
+				"  msc1=0x%llx msc2=0x%llx\n",
+				bank_names[i], status, addr, misc1, misc2);
+		}
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block tegra186_ari_panic_nb = {
+	.notifier_call = tegra186_ari_panic_handler,
+};
+
+static int __init tegra186_ari_init(void)
+{
+	if (of_machine_is_compatible("nvidia,tegra186"))
+		atomic_notifier_chain_register(&panic_notifier_list, &tegra186_ari_panic_nb);
+
+	return 0;
+}
+early_initcall(tegra186_ari_init);
-- 
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