diff options
| author | Richard Henderson <rth@twiddle.net> | 2017-03-02 13:06:18 +1100 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2017-05-12 15:40:29 -0700 |
| commit | 44977a8fe7b5ed8fc3d135b74d5933dfa53b11ee (patch) | |
| tree | 75815086b02f333f4372b3809170c3c066227b08 /target/s390x | |
| parent | 190b2422e65fb8bb559f4337dfe461a50d0b7ec1 (diff) | |
| download | qemu-44977a8fe7b5ed8fc3d135b74d5933dfa53b11ee.zip | |
target/s390x: Diagnose specification exception for atomics
All of the interlocked access facility instructions raise a
specification exception for unaligned accesses. Do this by
using the (previously unused) unaligned_access hook.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target/s390x')
| -rw-r--r-- | target/s390x/cpu.c | 1 | ||||
| -rw-r--r-- | target/s390x/cpu.h | 3 | ||||
| -rw-r--r-- | target/s390x/helper.c | 16 |
3 files changed, 20 insertions, 0 deletions
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c index 066dcd17df..a1bf2ba5a7 100644 --- a/target/s390x/cpu.c +++ b/target/s390x/cpu.c @@ -430,6 +430,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data) cc->write_elf64_note = s390_cpu_write_elf64_note; cc->cpu_exec_interrupt = s390_cpu_exec_interrupt; cc->debug_excp_handler = s390x_cpu_debug_excp_handler; + cc->do_unaligned_access = s390x_cpu_do_unaligned_access; #endif cc->disas_set_info = s390_cpu_disas_set_info; diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 058ddad83a..bbed32006c 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -480,6 +480,9 @@ int s390_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw, #ifndef CONFIG_USER_ONLY void do_restart_interrupt(CPUS390XState *env); +void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr, + MMUAccessType access_type, + int mmu_idx, uintptr_t retaddr); static inline hwaddr decode_basedisp_s(CPUS390XState *env, uint32_t ipb, uint8_t *ar) diff --git a/target/s390x/helper.c b/target/s390x/helper.c index 68bd2f9784..997849008f 100644 --- a/target/s390x/helper.c +++ b/target/s390x/helper.c @@ -718,4 +718,20 @@ void s390x_cpu_debug_excp_handler(CPUState *cs) cpu_loop_exit_noexc(cs); } } + +/* Unaligned accesses are only diagnosed with MO_ALIGN. At the moment, + this is only for the atomic operations, for which we want to raise a + specification exception. */ +void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr, + MMUAccessType access_type, + int mmu_idx, uintptr_t retaddr) +{ + S390CPU *cpu = S390_CPU(cs); + CPUS390XState *env = &cpu->env; + + if (retaddr) { + cpu_restore_state(cs, retaddr); + } + program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER); +} #endif /* CONFIG_USER_ONLY */ |