m68k updates for v6.3

- Add seccomp support, - Defconfig updates, - Miscellaneous fixes and improvements. -----BEGIN PGP SIGNATURE----- iIsEABYIADMWIQQ9qaHoIs/1I4cXmEiKwlD9ZEnxcAUCY/NpwhUcZ2VlcnRAbGlu dXgtbTY4ay5vcmcACgkQisJQ/WRJ8XB/LgD+OndW88TM184loE00WEECzgJjaOi6 /3MMHLp/KtjNuIMA/j5V3aM+s33rExNu7b14D1aXC4FYdB7VnMVJ+Xk2cHcH =xCVc -----END PGP SIGNATURE----- Merge tag 'm68k-for-v6.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven: - Add seccomp support - defconfig updates - Miscellaneous fixes and improvements * tag 'm68k-for-v6.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: /proc/hardware should depend on PROC_FS selftests/seccomp: Add m68k support m68k: Add kernel seccomp support m68k: Check syscall_trace_enter() return code m68k: defconfig: Update defconfigs for v6.2-rc3 m68k: q40: Do not initialise statics to 0
2023-02-21 15:17:34 -08:00 · 2023-02-21 15:17:34 -08:00 · eb6d5bbea2
parent bcf5470eb4 1e5b5df65a
commit eb6d5bbea2
24 changed files with 99 additions and 41 deletions
--- a/Documentation/features/seccomp/seccomp-filter/arch-support.txt
+++ b/Documentation/features/seccomp/seccomp-filter/arch-support.txt
@ -14,7 +14,7 @@
    |     hexagon: | TODO |
    |        ia64: | TODO |
    |   loongarch: |  ok  |
-    |        m68k: | TODO |
+    |        m68k: |  ok  |
    |  microblaze: | TODO |
    |        mips: |  ok  |
    |       nios2: | TODO |
--- a/arch/m68k/68000/entry.S
+++ b/arch/m68k/68000/entry.S
@ -45,6 +45,8 @@ do_trace:
 	jbsr	syscall_trace_enter
 	RESTORE_SWITCH_STACK
 	addql	#4,%sp
+	addql	#1,%d0
+	jeq	ret_from_exception
 	movel	%sp@(PT_OFF_ORIG_D0),%d1
 	movel	#-ENOSYS,%d0
 	cmpl	#NR_syscalls,%d1
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@ -18,6 +18,8 @@ config M68K
 	select GENERIC_CPU_DEVICES
 	select GENERIC_IOMAP
 	select GENERIC_IRQ_SHOW
+	select HAVE_ARCH_SECCOMP
+	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ASM_MODVERSIONS
 	select HAVE_DEBUG_BUGVERBOSE
 	select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_HAS_NO_UNALIGNED
--- a/arch/m68k/Kconfig.devices
+++ b/arch/m68k/Kconfig.devices
@ -19,6 +19,7 @@ config HEARTBEAT
 # We have a dedicated heartbeat LED. :-)
 config PROC_HARDWARE
 	bool "/proc/hardware support"
+	depends on PROC_FS
 	help
 	  Say Y here to support the /proc/hardware file, which gives you
 	  access to information about the machine you're running on,
--- a/arch/m68k/coldfire/entry.S
+++ b/arch/m68k/coldfire/entry.S
@ -90,6 +90,8 @@ ENTRY(system_call)
 	jbsr	syscall_trace_enter
 	RESTORE_SWITCH_STACK
 	addql	#4,%sp
+	addql	#1,%d0
+	jeq	ret_from_exception
 	movel	%d3,%a0
 	jbsr	%a0@
 	movel	%d0,%sp@(PT_OFF_D0)		/* save the return value */
--- a/arch/m68k/configs/amiga_defconfig
+++ b/arch/m68k/configs/amiga_defconfig
@ -108,7 +108,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -630,7 +629,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -638,7 +636,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/apollo_defconfig
+++ b/arch/m68k/configs/apollo_defconfig
@ -104,7 +104,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -586,7 +585,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -594,7 +592,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/atari_defconfig
+++ b/arch/m68k/configs/atari_defconfig
@ -111,7 +111,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -607,7 +606,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -615,7 +613,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/bvme6000_defconfig
+++ b/arch/m68k/configs/bvme6000_defconfig
@ -101,7 +101,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -578,7 +577,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -586,7 +584,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/hp300_defconfig
+++ b/arch/m68k/configs/hp300_defconfig
@ -103,7 +103,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -588,7 +587,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -596,7 +594,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/mac_defconfig
+++ b/arch/m68k/configs/mac_defconfig
@ -102,7 +102,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -609,7 +608,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -617,7 +615,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/multi_defconfig
+++ b/arch/m68k/configs/multi_defconfig
@ -122,7 +122,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -315,6 +314,7 @@ CONFIG_AF_KCM=m
 # CONFIG_WIRELESS is not set
 CONFIG_PSAMPLE=m
 CONFIG_NET_IFE=m
+CONFIG_PCCARD=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
@ -695,7 +695,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -703,7 +702,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/mvme147_defconfig
+++ b/arch/m68k/configs/mvme147_defconfig
@ -100,7 +100,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -577,7 +576,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -585,7 +583,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/mvme16x_defconfig
+++ b/arch/m68k/configs/mvme16x_defconfig
@ -101,7 +101,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -578,7 +577,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -586,7 +584,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/q40_defconfig
+++ b/arch/m68k/configs/q40_defconfig
@ -102,7 +102,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -596,7 +595,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -604,7 +602,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/sun3_defconfig
+++ b/arch/m68k/configs/sun3_defconfig
@ -98,7 +98,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -576,7 +575,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -584,7 +582,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/configs/sun3x_defconfig
+++ b/arch/m68k/configs/sun3x_defconfig
@ -98,7 +98,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@ -576,7 +575,6 @@ CONFIG_ASYNC_RAID6_TEST=m
 CONFIG_TEST_HEXDUMP=m
 CONFIG_STRING_SELFTEST=m
 CONFIG_TEST_STRING_HELPERS=m
-CONFIG_TEST_STRSCPY=m
 CONFIG_TEST_KSTRTOX=m
 CONFIG_TEST_PRINTF=m
 CONFIG_TEST_SCANF=m
@ -584,7 +582,6 @@ CONFIG_TEST_BITMAP=m
 CONFIG_TEST_UUID=m
 CONFIG_TEST_XARRAY=m
 CONFIG_TEST_RHASHTABLE=m
-CONFIG_TEST_SIPHASH=m
 CONFIG_TEST_IDA=m
 CONFIG_TEST_BITOPS=m
 CONFIG_TEST_VMALLOC=m
--- a/arch/m68k/include/asm/seccomp.h
+++ b/arch/m68k/include/asm/seccomp.h
@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ASM_SECCOMP_H
+#define _ASM_SECCOMP_H
+
+#include <asm-generic/seccomp.h>
+
+#define SECCOMP_ARCH_NATIVE		AUDIT_ARCH_M68K
+#define SECCOMP_ARCH_NATIVE_NR		NR_syscalls
+#define SECCOMP_ARCH_NATIVE_NAME	"m68k"
+
+#endif /* _ASM_SECCOMP_H */
--- a/arch/m68k/include/asm/syscall.h
+++ b/arch/m68k/include/asm/syscall.h
@ -4,6 +4,63 @@

 #include <uapi/linux/audit.h>

+#include <asm/unistd.h>
+
+extern const unsigned long sys_call_table[];
+
+static inline int syscall_get_nr(struct task_struct *task,
+				 struct pt_regs *regs)
+{
+	return regs->orig_d0;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+				    struct pt_regs *regs)
+{
+	regs->d0 = regs->orig_d0;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	unsigned long error = regs->d0;
+
+	return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+					    struct pt_regs *regs)
+{
+	return regs->d0;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+					    struct pt_regs *regs,
+					    int error, long val)
+{
+	regs->d0 = (long)error ?: val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned long *args)
+{
+	args[0] = regs->orig_d0;
+	args++;
+
+	memcpy(args, &regs->d1, 5 * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned long *args)
+{
+	regs->orig_d0 = args[0];
+	args++;
+
+	memcpy(&regs->d1, args, 5 * sizeof(args[0]));
+}
+
 static inline int syscall_get_arch(struct task_struct *task)
 {
 	return AUDIT_ARCH_M68K;
--- a/arch/m68k/include/asm/thread_info.h
+++ b/arch/m68k/include/asm/thread_info.h
@ -61,6 +61,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_NOTIFY_RESUME	5	/* callback before returning to user */
 #define TIF_SIGPENDING		6	/* signal pending */
 #define TIF_NEED_RESCHED	7	/* rescheduling necessary */
+#define TIF_SECCOMP		13	/* seccomp syscall filtering active */
 #define TIF_DELAYED_TRACE	14	/* single step a syscall */
 #define TIF_SYSCALL_TRACE	15	/* syscall trace active */
 #define TIF_MEMDIE		16	/* is terminating due to OOM killer */
@ -69,6 +70,7 @@ static inline struct thread_info *current_thread_info(void)
 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
 #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
+#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
 #define _TIF_DELAYED_TRACE	(1 << TIF_DELAYED_TRACE)
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
 #define _TIF_MEMDIE		(1 << TIF_MEMDIE)
--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@ -184,9 +184,12 @@ do_trace_entry:
 	jbsr	syscall_trace_enter
 	RESTORE_SWITCH_STACK
 	addql	#4,%sp
+	addql	#1,%d0			| optimization for cmpil #-1,%d0
+	jeq	ret_from_syscall
 	movel	%sp@(PT_OFF_ORIG_D0),%d0
 	cmpl	#NR_syscalls,%d0
 	jcs	syscall
+	jra	ret_from_syscall
 badsys:
 	movel	#-ENOSYS,%sp@(PT_OFF_D0)
 	jra	ret_from_syscall
@ -211,6 +214,9 @@ ENTRY(system_call)
 	| syscall trace?
 	tstb	%a1@(TINFO_FLAGS+2)
 	jmi	do_trace_entry
+	| seccomp filter active?
+	btst	#5,%a1@(TINFO_FLAGS+2)
+	bnes	do_trace_entry
 	cmpl	#NR_syscalls,%d0
 	jcc	badsys
 syscall:
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@ -21,7 +21,7 @@
 #include <linux/signal.h>
 #include <linux/regset.h>
 #include <linux/elf.h>
-
+#include <linux/seccomp.h>
 #include <linux/uaccess.h>
 #include <asm/page.h>
 #include <asm/processor.h>
@ -278,6 +278,10 @@ asmlinkage int syscall_trace_enter(void)

 	if (test_thread_flag(TIF_SYSCALL_TRACE))
 		ret = ptrace_report_syscall_entry(task_pt_regs(current));
+
+	if (secure_computing() == -1)
+		return -1;
+
 	return ret;
 }

--- a/arch/m68k/q40/q40ints.c
+++ b/arch/m68k/q40/q40ints.c
@ -201,8 +201,8 @@ static int ccleirq=60;    /* ISA dev IRQs*/
 #define DEBUG_Q40INT
 /*#define IP_USE_DISABLE *//* would be nice, but crashes ???? */

-static int mext_disabled=0;  /* ext irq disabled by master chip? */
-static int aliased_irq=0;  /* how many times inside handler ?*/
+static int mext_disabled;	/* ext irq disabled by master chip? */
+static int aliased_irq;		/* how many times inside handler ?*/


 /* got interrupt, dispatch to ISA or keyboard/timer IRQs */
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@ -138,6 +138,8 @@ struct seccomp_data {
 #  define __NR_seccomp 337
 # elif defined(__sh__)
 #  define __NR_seccomp 372
+# elif defined(__mc68000__)
+#  define __NR_seccomp 380
 # else
 #  warning "seccomp syscall number unknown for this architecture"
 #  define __NR_seccomp 0xffff
@ -1838,6 +1840,10 @@ TEST_F(TRACE_poke, getpid_runs_normally)
 # define ARCH_REGS		struct pt_regs
 # define SYSCALL_NUM(_regs)	(_regs).regs[3]
 # define SYSCALL_RET(_regs)	(_regs).regs[0]
+#elif defined(__mc68000__)
+# define ARCH_REGS		struct user_regs_struct
+# define SYSCALL_NUM(_regs)	(_regs).orig_d0
+# define SYSCALL_RET(_regs)	(_regs).d0
 #else
 # error "Do not know how to find your architecture's registers and syscalls"
 #endif
@ -1902,7 +1908,7 @@ const bool ptrace_entry_set_syscall_ret =
 * Use PTRACE_GETREGS and PTRACE_SETREGS when available. This is useful for
 * architectures without HAVE_ARCH_TRACEHOOK (e.g. User-mode Linux).
 */
-#if defined(__x86_64__) || defined(__i386__) || defined(__mips__)
+#if defined(__x86_64__) || defined(__i386__) || defined(__mips__) || defined(__mc68000__)
 # define ARCH_GETREGS(_regs)	ptrace(PTRACE_GETREGS, tracee, 0, &(_regs))
 # define ARCH_SETREGS(_regs)	ptrace(PTRACE_SETREGS, tracee, 0, &(_regs))
 #else