diff options
Diffstat (limited to 'target/s390x/mem_helper.c')
| -rw-r--r-- | target/s390x/mem_helper.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index c71dce4b1e..ec4760e390 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -20,6 +20,7 @@ #include "qemu/osdep.h" #include "cpu.h" +#include "internal.h" #include "exec/address-spaces.h" #include "exec/helper-proto.h" #include "exec/exec-all.h" @@ -56,6 +57,17 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type, #define HELPER_LOG(x...) #endif +static inline bool psw_key_valid(CPUS390XState *env, uint8_t psw_key) +{ + uint16_t pkm = env->cregs[3] >> 16; + + if (env->psw.mask & PSW_MASK_PSTATE) { + /* PSW key has range 0..15, it is valid if the bit is 1 in the PKM */ + return pkm & (0x80 >> psw_key); + } + return true; +} + /* Reduce the length so that addr + len doesn't cross a page boundary. */ static inline uint32_t adj_len_to_page(uint32_t len, uint64_t addr) { |