Merge v6.16.2linux-rolling-stable

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/arch/x86/lib/crc-t10dif.c b/arch/x86/lib/crc-t10dif.c
new file mode 100644
index 000000000000..db7ce59c31ac
--- /dev/null
+++ b/arch/x86/lib/crc-t10dif.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * CRC-T10DIF using [V]PCLMULQDQ instructions
+ *
+ * Copyright 2024 Google LLC
+ */
+
+#include <linux/crc-t10dif.h>
+#include <linux/module.h>
+#include "crc-pclmul-template.h"
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_pclmulqdq);
+
+DECLARE_CRC_PCLMUL_FUNCS(crc16_msb, u16);
+
+u16 crc_t10dif_arch(u16 crc, const u8 *p, size_t len)
+{
+	CRC_PCLMUL(crc, p, len, crc16_msb, crc16_msb_0x8bb7_consts,
+		   have_pclmulqdq);
+	return crc_t10dif_generic(crc, p, len);
+}
+EXPORT_SYMBOL(crc_t10dif_arch);
+
+static int __init crc_t10dif_x86_init(void)
+{
+	if (boot_cpu_has(X86_FEATURE_PCLMULQDQ)) {
+		static_branch_enable(&have_pclmulqdq);
+		INIT_CRC_PCLMUL(crc16_msb);
+	}
+	return 0;
+}
+subsys_initcall(crc_t10dif_x86_init);
+
+static void __exit crc_t10dif_x86_exit(void)
+{
+}
+module_exit(crc_t10dif_x86_exit);
+
+MODULE_DESCRIPTION("CRC-T10DIF using [V]PCLMULQDQ instructions");
+MODULE_LICENSE("GPL");