git: 27e9c833bb8f - stable/14 - arm64: Add EL1 hardware breakpoint exceptions

The branch stable/14 has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=27e9c833bb8fdb87618649ae8193fe5485ccfdc3

commit 27e9c833bb8fdb87618649ae8193fe5485ccfdc3
Author:     Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2024-03-12 16:50:04 +0000
Commit:     Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2024-07-15 12:23:58 +0000

    arm64: Add EL1 hardware breakpoint exceptions
    
    Reviewed by:    jhb
    Sponsored by:   Arm Ltd
    Differential Revision:  https://reviews.freebsd.org/D44353
    
    (cherry picked from commit c802b486ddfd796ea35b770148af9a5b0cd0ee64)
---
 sys/arm64/arm64/gdb_machdep.c  | 1 +
 sys/arm64/arm64/trap.c         | 2 ++
 sys/arm64/include/armreg.h     | 1 +
 sys/arm64/include/db_machdep.h | 4 +++-
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/sys/arm64/arm64/gdb_machdep.c b/sys/arm64/arm64/gdb_machdep.c
index dcfc91b33eb7..7b21675ea927 100644
--- a/sys/arm64/arm64/gdb_machdep.c
+++ b/sys/arm64/arm64/gdb_machdep.c
@@ -110,6 +110,7 @@ gdb_cpu_signal(int type, int code __unused)
 	switch (type) {
 	case EXCP_WATCHPT_EL1:
 	case EXCP_SOFTSTP_EL1:
+	case EXCP_BRKPT_EL1:
 	case EXCP_BRK:
 		return (SIGTRAP);
 	}
diff --git a/sys/arm64/arm64/trap.c b/sys/arm64/arm64/trap.c
index 50f930b66664..69c5cd73ade8 100644
--- a/sys/arm64/arm64/trap.c
+++ b/sys/arm64/arm64/trap.c
@@ -498,6 +498,7 @@ do_el1h_sync(struct thread *td, struct trapframe *frame)
 	 */
 	switch (exception) {
 	case EXCP_BRK:
+	case EXCP_BRKPT_EL1:
 	case EXCP_WATCHPT_EL1:
 	case EXCP_SOFTSTP_EL1:
 		break;
@@ -549,6 +550,7 @@ do_el1h_sync(struct thread *td, struct trapframe *frame)
 		panic("No debugger in kernel.");
 #endif
 		break;
+	case EXCP_BRKPT_EL1:
 	case EXCP_WATCHPT_EL1:
 	case EXCP_SOFTSTP_EL1:
 #ifdef KDB
diff --git a/sys/arm64/include/armreg.h b/sys/arm64/include/armreg.h
index 6f9e109f4b70..b2dfd61c3083 100644
--- a/sys/arm64/include/armreg.h
+++ b/sys/arm64/include/armreg.h
@@ -439,6 +439,7 @@
 #define	 EXCP_TRAP_FP		0x2c	/* Trapped FP exception */
 #define	 EXCP_SERROR		0x2f	/* SError interrupt */
 #define	 EXCP_BRKPT_EL0		0x30	/* Hardware breakpoint, from same EL */
+#define	 EXCP_BRKPT_EL1		0x31	/* Hardware breakpoint, from same EL */
 #define	 EXCP_SOFTSTP_EL0	0x32	/* Software Step, from lower EL */
 #define	 EXCP_SOFTSTP_EL1	0x33	/* Software Step, from same EL */
 #define	 EXCP_WATCHPT_EL0	0x34	/* Watchpoint, from lower EL */
diff --git a/sys/arm64/include/db_machdep.h b/sys/arm64/include/db_machdep.h
index f1f638a7882c..45b97443aec5 100644
--- a/sys/arm64/include/db_machdep.h
+++ b/sys/arm64/include/db_machdep.h
@@ -36,6 +36,7 @@
 #include <machine/trap.h>
 
 #define	T_BREAKPOINT	(EXCP_BRK)
+#define	T_HW_BREAKPOINT	(EXCP_BRKPT_EL1)
 #define	T_SINGLESTEP	(EXCP_SOFTSTP_EL1)
 #define	T_WATCHPOINT	(EXCP_WATCHPT_EL1)
 
@@ -56,7 +57,8 @@ typedef long		db_expr_t;
 #define	db_clear_single_step	kdb_cpu_clear_singlestep
 #define	db_set_single_step	kdb_cpu_set_singlestep
 
-#define	IS_BREAKPOINT_TRAP(type, code)	(type == T_BREAKPOINT)
+#define	IS_BREAKPOINT_TRAP(type, code)	\
+    (type == T_BREAKPOINT || type == T_HW_BREAKPOINT)
 #define	IS_SSTEP_TRAP(type, code)	(type == T_SINGLESTEP)
 #define	IS_WATCHPOINT_TRAP(type, code)	(type == T_WATCHPOINT)