On 3/13/20 1:57 PM, Claudio Imbrenda wrote: > On Wed, 11 Mar 2020 09:21:45 -0400 > Janosch Frank <fran...@linux.ibm.com> wrote: > >> 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 <fran...@linux.ibm.com> >> Reviewed-by: Thomas Huth <th...@redhat.com> >> Reviewed-by: David Hildenbrand <da...@redhat.com> >> --- >> target/s390x/cpu.c | 22 +++++++++++++--------- >> 1 file changed, 13 insertions(+), 9 deletions(-) >> >> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c >> index 84029f14814b4980..a48d39f139cdc1c4 100644 >> --- a/target/s390x/cpu.c >> +++ b/target/s390x/cpu.c >> @@ -78,16 +78,20 @@ 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 { >> + s390_cpu_set_state(S390_CPU_STATE_LOAD, cpu); >> + } >> s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu); >> } >> #endif > > I don't understand why you set the state to S390_CPU_STATE_LOAD and > then immediately afterwards to S390_CPU_STATE_OPERATING, especially > considering that both do the same >
Have a look at the specs, wee need to set the load state before setting the cpu to operating. I can add a comment to make it clearer if you want.
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