diff options
Diffstat (limited to 'arch/s390/kernel/traps.c')
| -rw-r--r-- | arch/s390/kernel/traps.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index 160b2acba8db..24fee11b030d 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -31,6 +31,7 @@ #include <asm/asm-extable.h> #include <asm/vtime.h> #include <asm/fpu.h> +#include <asm/fault.h> #include "entry.h" static inline void __user *get_trap_ip(struct pt_regs *regs) @@ -317,9 +318,24 @@ void noinstr __do_pgm_check(struct pt_regs *regs) struct lowcore *lc = get_lowcore(); irqentry_state_t state; unsigned int trapnr; + union teid teid; + teid.val = lc->trans_exc_code; regs->int_code = lc->pgm_int_code; - regs->int_parm_long = lc->trans_exc_code; + regs->int_parm_long = teid.val; + + /* + * In case of a guest fault, short-circuit the fault handler and return. + * This way the sie64a() function will return 0; fault address and + * other relevant bits are saved in current->thread.gmap_teid, and + * the fault number in current->thread.gmap_int_code. KVM will be + * able to use this information to handle the fault. + */ + if (test_pt_regs_flag(regs, PIF_GUEST_FAULT)) { + current->thread.gmap_teid.val = regs->int_parm_long; + current->thread.gmap_int_code = regs->int_code & 0xffff; + return; + } state = irqentry_enter(regs); @@ -408,8 +424,8 @@ static void (*pgm_check_table[128])(struct pt_regs *regs) = { [0x3b] = do_dat_exception, [0x3c] = default_trap_handler, [0x3d] = do_secure_storage_access, - [0x3e] = do_non_secure_storage_access, - [0x3f] = do_secure_storage_violation, + [0x3e] = default_trap_handler, + [0x3f] = default_trap_handler, [0x40] = monitor_event_exception, [0x41 ... 0x7f] = default_trap_handler, }; @@ -420,5 +436,3 @@ static void (*pgm_check_table[128])(struct pt_regs *regs) = { __stringify(default_trap_handler)) COND_TRAP(do_secure_storage_access); -COND_TRAP(do_non_secure_storage_access); -COND_TRAP(do_secure_storage_violation); |