diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2017-11-20 12:13:52 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 11:21:26 +0200 |
| commit | 9e8df6daed9e59153624e52aa4832ddaf39f1ae8 (patch) | |
| tree | a8e09dfddde0eed16b6665d677d69b55422be560 /arch/s390 | |
| parent | dde709d1361ab50d3b9f2824f72b4374f5582e84 (diff) | |
| download | linux-9e8df6daed9e59153624e52aa4832ddaf39f1ae8.tar.bz2 | |
s390/smp: kasan stack instrumentation support
smp_start_secondary function is called without DAT enabled. To avoid
disabling kasan instrumentation for entire arch/s390/kernel/smp.c
smp_start_secondary has been split in 2 parts. smp_start_secondary has
instrumentation disabled, it does minimal setup and enables DAT. Then
instrumentated __smp_start_secondary is called to do the rest.
__load_psw_mask function instrumentation has been disabled as well
to be able to call it from smp_start_secondary.
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 43494a014d5b..55956c96558c 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -336,7 +336,7 @@ static inline void __load_psw(psw_t psw) * Set PSW mask to specified value, while leaving the * PSW addr pointing to the next instruction. */ -static inline void __load_psw_mask(unsigned long mask) +static __no_sanitize_address_or_inline void __load_psw_mask(unsigned long mask) { unsigned long addr; psw_t psw; diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 032d98bfc60a..c98059faee46 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -804,6 +804,8 @@ static void smp_init_secondary(void) { int cpu = smp_processor_id(); + S390_lowcore.last_update_clock = get_tod_clock(); + restore_access_regs(S390_lowcore.access_regs_save_area); cpu_init(); preempt_disable(); init_cpu_timer(); @@ -823,14 +825,12 @@ static void smp_init_secondary(void) /* * Activate a secondary processor. */ -static void smp_start_secondary(void *cpuvoid) +static void __no_sanitize_address smp_start_secondary(void *cpuvoid) { - S390_lowcore.last_update_clock = get_tod_clock(); S390_lowcore.restart_stack = (unsigned long) restart_stack; S390_lowcore.restart_fn = (unsigned long) do_restart; S390_lowcore.restart_data = 0; S390_lowcore.restart_source = -1UL; - restore_access_regs(S390_lowcore.access_regs_save_area); __ctl_load(S390_lowcore.cregs_save_area, 0, 15); __load_psw_mask(PSW_KERNEL_BITS | PSW_MASK_DAT); CALL_ON_STACK(smp_init_secondary, S390_lowcore.kernel_stack, 0); |