diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/ctl_reg.h | 19 | ||||
| -rw-r--r-- | arch/s390/kernel/machine_kexec.c | 11 | ||||
| -rw-r--r-- | arch/s390/kernel/nmi.c | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/ptrace.c | 30 |
4 files changed, 42 insertions, 22 deletions
diff --git a/arch/s390/include/asm/ctl_reg.h b/arch/s390/include/asm/ctl_reg.h index e508dff92535..5d23ecf4297a 100644 --- a/arch/s390/include/asm/ctl_reg.h +++ b/arch/s390/include/asm/ctl_reg.h @@ -54,7 +54,11 @@ void smp_ctl_clear_bit(int cr, int bit); union ctlreg0 { unsigned long val; struct { - unsigned long : 32; + unsigned long : 8; + unsigned long tcx : 1; /* Transactional-Execution control */ + unsigned long pifo : 1; /* Transactional-Execution Program- + Interruption-Filtering Override */ + unsigned long : 22; unsigned long : 3; unsigned long lap : 1; /* Low-address-protection control */ unsigned long : 4; @@ -70,6 +74,19 @@ union ctlreg0 { }; }; +union ctlreg2 { + unsigned long val; + struct { + unsigned long : 33; + unsigned long ducto : 25; + unsigned long : 1; + unsigned long gse : 1; + unsigned long : 1; + unsigned long tds : 1; + unsigned long tdc : 2; + }; +}; + #ifdef CONFIG_SMP # define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit) # define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit) diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c index 51e8c63705a9..e94421678b13 100644 --- a/arch/s390/kernel/machine_kexec.c +++ b/arch/s390/kernel/machine_kexec.c @@ -105,7 +105,7 @@ static void __do_machine_kdump(void *image) static noinline void __machine_kdump(void *image) { struct mcesa *mcesa; - unsigned long cr2_old, cr2_new; + union ctlreg2 cr2_old, cr2_new; int this_cpu, cpu; lgr_info_log(); @@ -122,11 +122,12 @@ static noinline void __machine_kdump(void *image) if (MACHINE_HAS_VX) save_vx_regs((__vector128 *) mcesa->vector_save_area); if (MACHINE_HAS_GS) { - __ctl_store(cr2_old, 2, 2); - cr2_new = cr2_old | (1UL << 4); - __ctl_load(cr2_new, 2, 2); + __ctl_store(cr2_old.val, 2, 2); + cr2_new = cr2_old; + cr2_new.gse = 1; + __ctl_load(cr2_new.val, 2, 2); save_gs_cb((struct gs_cb *) mcesa->guarded_storage_save_area); - __ctl_load(cr2_old, 2, 2); + __ctl_load(cr2_old.val, 2, 2); } /* * To create a good backchain for this CPU in the dump store_status diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c index 15e28eefe7e9..eb3e702cee30 100644 --- a/arch/s390/kernel/nmi.c +++ b/arch/s390/kernel/nmi.c @@ -107,6 +107,7 @@ EXPORT_SYMBOL_GPL(s390_handle_mcck); */ static int notrace s390_validate_registers(union mci mci, int umode) { + union ctlreg2 cr2; int kill_task; u64 zero; void *fpt_save_area; @@ -231,7 +232,8 @@ static int notrace s390_validate_registers(union mci mci, int umode) kill_task = 1; } /* Validate guarded storage registers */ - if (MACHINE_HAS_GS && (S390_lowcore.cregs_save_area[2] & (1UL << 4))) { + cr2.val = S390_lowcore.cregs_save_area[2]; + if (cr2.gse) { if (!mci.gs) /* * Guarded storage register can't be restored and diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index ea711f141bb8..ea637365d9ef 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -47,42 +47,42 @@ void update_cr_regs(struct task_struct *task) struct pt_regs *regs = task_pt_regs(task); struct thread_struct *thread = &task->thread; struct per_regs old, new; - unsigned long cr0_old, cr0_new; - unsigned long cr2_old, cr2_new; + union ctlreg0 cr0_old, cr0_new; + union ctlreg2 cr2_old, cr2_new; int cr0_changed, cr2_changed; - __ctl_store(cr0_old, 0, 0); - __ctl_store(cr2_old, 2, 2); + __ctl_store(cr0_old.val, 0, 0); + __ctl_store(cr2_old.val, 2, 2); cr0_new = cr0_old; cr2_new = cr2_old; /* Take care of the enable/disable of transactional execution. */ if (MACHINE_HAS_TE) { /* Set or clear transaction execution TXC bit 8. */ - cr0_new |= (1UL << 55); + cr0_new.tcx = 1; if (task->thread.per_flags & PER_FLAG_NO_TE) - cr0_new &= ~(1UL << 55); + cr0_new.tcx = 0; /* Set or clear transaction execution TDC bits 62 and 63. */ - cr2_new &= ~3UL; + cr2_new.tdc = 0; if (task->thread.per_flags & PER_FLAG_TE_ABORT_RAND) { if (task->thread.per_flags & PER_FLAG_TE_ABORT_RAND_TEND) - cr2_new |= 1UL; + cr2_new.tdc = 1; else - cr2_new |= 2UL; + cr2_new.tdc = 2; } } /* Take care of enable/disable of guarded storage. */ if (MACHINE_HAS_GS) { - cr2_new &= ~(1UL << 4); + cr2_new.gse = 0; if (task->thread.gs_cb) - cr2_new |= (1UL << 4); + cr2_new.gse = 1; } /* Load control register 0/2 iff changed */ - cr0_changed = cr0_new != cr0_old; - cr2_changed = cr2_new != cr2_old; + cr0_changed = cr0_new.val != cr0_old.val; + cr2_changed = cr2_new.val != cr2_old.val; if (cr0_changed) - __ctl_load(cr0_new, 0, 0); + __ctl_load(cr0_new.val, 0, 0); if (cr2_changed) - __ctl_load(cr2_new, 2, 2); + __ctl_load(cr2_new.val, 2, 2); /* Copy user specified PER registers */ new.control = thread->per_user.control; new.start = thread->per_user.start; |