diff options
| -rw-r--r-- | target/s390x/kvm.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index 8bcd832123..a9d6d606df 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -752,12 +752,20 @@ int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, uint8_t ar, void *hostbuf, */ static void *legacy_s390_alloc(size_t size, uint64_t *align, bool shared) { - void *mem; + static void *mem; + + if (mem) { + /* we only support one allocation, which is enough for initial ram */ + return NULL; + } mem = mmap((void *) 0x800000000ULL, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); - return mem == MAP_FAILED ? NULL : mem; + if (mem == MAP_FAILED) { + mem = NULL; + } + return mem; } static uint8_t const *sw_bp_inst; |