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| author | Thomas Huth <thuth@linux.vnet.ibm.com> | 2015-02-12 18:09:39 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-02-18 09:37:15 +0100 |
| commit | 166f1bb7968738490fafc058e4b6505eb78701b6 (patch) | |
| tree | 2b89381ded1b3d820c57f5029d36cb4e31d629e5 | |
| parent | 7f74f0aa74a01698ef24459f7bc2a23f3880a2b8 (diff) | |
| download | qemu-166f1bb7968738490fafc058e4b6505eb78701b6.zip qemu-166f1bb7968738490fafc058e4b6505eb78701b6.tar.gz qemu-166f1bb7968738490fafc058e4b6505eb78701b6.tar.bz2 | |
s390x/ioinst: Rework memory access in CHSC instruction
Change the CHSC handler to correctly use logical addresses, too.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| -rw-r--r-- | target-s390x/ioinst.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/target-s390x/ioinst.c b/target-s390x/ioinst.c index 157972d..7e748c2 100644 --- a/target-s390x/ioinst.c +++ b/target-s390x/ioinst.c @@ -629,8 +629,8 @@ void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb) int reg; uint16_t len; uint16_t command; - hwaddr map_size = TARGET_PAGE_SIZE; CPUS390XState *env = &cpu->env; + uint8_t buf[TARGET_PAGE_SIZE]; trace_ioinst("chsc"); reg = (ipb >> 20) & 0x00f; @@ -640,16 +640,20 @@ void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb) program_interrupt(env, PGM_SPECIFICATION, 2); return; } - req = s390_cpu_physical_memory_map(env, addr, &map_size, 1); - if (!req || map_size != TARGET_PAGE_SIZE) { - program_interrupt(env, PGM_ADDRESSING, 2); - goto out; + /* + * Reading sizeof(ChscReq) bytes is currently enough for all of our + * present CHSC sub-handlers ... if we ever need more, we should take + * care of req->len here first. + */ + if (s390_cpu_virt_mem_read(cpu, addr, buf, sizeof(ChscReq))) { + return; } + req = (ChscReq *)buf; len = be16_to_cpu(req->len); /* Length field valid? */ if ((len < 16) || (len > 4088) || (len & 7)) { program_interrupt(env, PGM_OPERAND, 2); - goto out; + return; } memset((char *)req + len, 0, TARGET_PAGE_SIZE - len); res = (void *)((char *)req + len); @@ -673,9 +677,9 @@ void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb) break; } - setcc(cpu, 0); /* Command execution complete */ -out: - s390_cpu_physical_memory_unmap(env, req, map_size, 1); + if (!s390_cpu_virt_mem_write(cpu, addr + len, res, be16_to_cpu(res->len))) { + setcc(cpu, 0); /* Command execution complete */ + } } int ioinst_handle_tpi(CPUS390XState *env, uint32_t ipb) |