diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h
index ae35939f395b..a87a8305051f 100644
--- a/arch/arm64/include/asm/esr.h
+++ b/arch/arm64/include/asm/esr.h
@@ -51,7 +51,8 @@
 #define ESR_ELx_EC_FP_EXC32	(0x28)
 /* Unallocated EC: 0x29 - 0x2B */
 #define ESR_ELx_EC_FP_EXC64	(0x2C)
-/* Unallocated EC: 0x2D - 0x2E */
+#define ESR_ELx_EC_GCS		(0x2D)
+/* Unallocated EC: 0x2E */
 #define ESR_ELx_EC_SERROR	(0x2F)
 #define ESR_ELx_EC_BREAKPT_LOW	(0x30)
 #define ESR_ELx_EC_BREAKPT_CUR	(0x31)
@@ -382,6 +383,31 @@
 #define ESR_ELx_MOPS_ISS_SRCREG(esr)	(((esr) & (UL(0x1f) << 5)) >> 5)
 #define ESR_ELx_MOPS_ISS_SIZEREG(esr)	(((esr) & (UL(0x1f) << 0)) >> 0)
 
+/* ISS field definitions for GCS */
+#define ESR_ELx_ExType_SHIFT	(20)
+#define ESR_ELx_ExType_MASK		GENMASK(23, 20)
+#define ESR_ELx_Raddr_SHIFT		(10)
+#define ESR_ELx_Raddr_MASK		GENMASK(14, 10)
+#define ESR_ELx_Rn_SHIFT		(5)
+#define ESR_ELx_Rn_MASK			GENMASK(9, 5)
+#define ESR_ELx_Rvalue_SHIFT		5
+#define ESR_ELx_Rvalue_MASK		GENMASK(9, 5)
+#define ESR_ELx_IT_SHIFT		(0)
+#define ESR_ELx_IT_MASK			GENMASK(4, 0)
+
+#define ESR_ELx_ExType_DATA_CHECK	0
+#define ESR_ELx_ExType_EXLOCK		1
+#define ESR_ELx_ExType_STR		2
+
+#define ESR_ELx_IT_RET			0
+#define ESR_ELx_IT_GCSPOPM		1
+#define ESR_ELx_IT_RET_KEYA		2
+#define ESR_ELx_IT_RET_KEYB		3
+#define ESR_ELx_IT_GCSSS1		4
+#define ESR_ELx_IT_GCSSS2		5
+#define ESR_ELx_IT_GCSPOPCX		6
+#define ESR_ELx_IT_GCSPOPX		7
+
 #ifndef __ASSEMBLY__
 #include <asm/types.h>
 
diff --git a/arch/arm64/include/asm/exception.h b/arch/arm64/include/asm/exception.h
index ad688e157c9b..99caff458e20 100644
--- a/arch/arm64/include/asm/exception.h
+++ b/arch/arm64/include/asm/exception.h
@@ -57,6 +57,8 @@ void do_el0_undef(struct pt_regs *regs, unsigned long esr);
 void do_el1_undef(struct pt_regs *regs, unsigned long esr);
 void do_el0_bti(struct pt_regs *regs);
 void do_el1_bti(struct pt_regs *regs, unsigned long esr);
+void do_el0_gcs(struct pt_regs *regs, unsigned long esr);
+void do_el1_gcs(struct pt_regs *regs, unsigned long esr);
 void do_debug_exception(unsigned long addr_if_watchpoint, unsigned long esr,
 			struct pt_regs *regs);
 void do_fpsimd_acc(unsigned long esr, struct pt_regs *regs);
diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c
index 0fc94207e69a..52d78ce63a4e 100644
--- a/arch/arm64/kernel/entry-common.c
+++ b/arch/arm64/kernel/entry-common.c
@@ -429,6 +429,15 @@ static void noinstr el1_bti(struct pt_regs *regs, unsigned long esr)
 	exit_to_kernel_mode(regs);
 }
 
+static void noinstr el1_gcs(struct pt_regs *regs, unsigned long esr)
+{
+	enter_from_kernel_mode(regs);
+	local_daif_inherit(regs);
+	do_el1_gcs(regs, esr);
+	local_daif_mask();
+	exit_to_kernel_mode(regs);
+}
+
 static void noinstr el1_dbg(struct pt_regs *regs, unsigned long esr)
 {
 	unsigned long far = read_sysreg(far_el1);
@@ -471,6 +480,9 @@ asmlinkage void noinstr el1h_64_sync_handler(struct pt_regs *regs)
 	case ESR_ELx_EC_BTI:
 		el1_bti(regs, esr);
 		break;
+	case ESR_ELx_EC_GCS:
+		el1_gcs(regs, esr);
+		break;
 	case ESR_ELx_EC_BREAKPT_CUR:
 	case ESR_ELx_EC_SOFTSTP_CUR:
 	case ESR_ELx_EC_WATCHPT_CUR:
@@ -650,6 +662,14 @@ static void noinstr el0_mops(struct pt_regs *regs, unsigned long esr)
 	exit_to_user_mode(regs);
 }
 
+static void noinstr el0_gcs(struct pt_regs *regs, unsigned long esr)
+{
+	enter_from_user_mode(regs);
+	local_daif_restore(DAIF_PROCCTX);
+	do_el0_gcs(regs, esr);
+	exit_to_user_mode(regs);
+}
+
 static void noinstr el0_inv(struct pt_regs *regs, unsigned long esr)
 {
 	enter_from_user_mode(regs);
@@ -732,6 +752,9 @@ asmlinkage void noinstr el0t_64_sync_handler(struct pt_regs *regs)
 	case ESR_ELx_EC_MOPS:
 		el0_mops(regs, esr);
 		break;
+	case ESR_ELx_EC_GCS:
+		el0_gcs(regs, esr);
+		break;
 	case ESR_ELx_EC_BREAKPT_LOW:
 	case ESR_ELx_EC_SOFTSTP_LOW:
 	case ESR_ELx_EC_WATCHPT_LOW:
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 215e6d7f2df8..fb867c6526a6 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -500,6 +500,16 @@ void do_el1_bti(struct pt_regs *regs, unsigned long esr)
 	die("Oops - BTI", regs, esr);
 }
 
+void do_el0_gcs(struct pt_regs *regs, unsigned long esr)
+{
+	force_signal_inject(SIGSEGV, SEGV_CPERR, regs->pc, 0);
+}
+
+void do_el1_gcs(struct pt_regs *regs, unsigned long esr)
+{
+	die("Oops - GCS", regs, esr);
+}
+
 void do_el0_fpac(struct pt_regs *regs, unsigned long esr)
 {
 	force_signal_inject(SIGILL, ILL_ILLOPN, regs->pc, esr);
@@ -838,6 +848,7 @@ static const char *esr_class_str[] = {
 	[ESR_ELx_EC_MOPS]		= "MOPS",
 	[ESR_ELx_EC_FP_EXC32]		= "FP (AArch32)",
 	[ESR_ELx_EC_FP_EXC64]		= "FP (AArch64)",
+	[ESR_ELx_EC_GCS]		= "Guarded Control Stack",
 	[ESR_ELx_EC_SERROR]		= "SError",
 	[ESR_ELx_EC_BREAKPT_LOW]	= "Breakpoint (lower EL)",
 	[ESR_ELx_EC_BREAKPT_CUR]	= "Breakpoint (current EL)",
