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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>
This commit is contained in:
Thomas Huth 2015-02-12 18:09:39 +01:00 committed by Christian Borntraeger
parent 7f74f0aa74
commit 166f1bb796
1 changed files with 13 additions and 9 deletions
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22
target-s390x/ioinst.c
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@ -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)