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s390x: protvirt: Set guest IPL PSW

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Handling of CPU reset and setting of the IPL psw from guest storage at
offset 0 is done by a Ultravisor call. Let's only fetch it if
necessary.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200319131921.2367-11-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Janosch Frank 2020-03-19 09:19:15 -04:00 committed by Cornelia Huck
parent 0f73c5b30b
commit 59181010a2
1 changed files with 17 additions and 9 deletions
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26
target/s390x/cpu.c
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@ -77,16 +77,24 @@ static bool s390_cpu_has_work(CPUState *cs)
static void s390_cpu_load_normal(CPUState *s)
{
S390CPU *cpu = S390_CPU(s);
uint64_t spsw = ldq_phys(s->as, 0);
cpu->env.psw.mask = spsw & PSW_MASK_SHORT_CTRL;
/*
* Invert short psw indication, so SIE will report a specification
* exception if it was not set.
*/
cpu->env.psw.mask ^= PSW_MASK_SHORTPSW;
cpu->env.psw.addr = spsw & PSW_MASK_SHORT_ADDR;
uint64_t spsw;
if (!s390_is_pv()) {
spsw = ldq_phys(s->as, 0);
cpu->env.psw.mask = spsw & PSW_MASK_SHORT_CTRL;
/*
* Invert short psw indication, so SIE will report a specification
* exception if it was not set.
*/
cpu->env.psw.mask ^= PSW_MASK_SHORTPSW;
cpu->env.psw.addr = spsw & PSW_MASK_SHORT_ADDR;
} else {
/*
* Firmware requires us to set the load state before we set
* the cpu to operating on protected guests.
*/
s390_cpu_set_state(S390_CPU_STATE_LOAD, cpu);
}
s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu);
}
#endif