From 998eb7448c75b432a13257d019f6866e604ce43c Mon Sep 17 00:00:00 2001 From: Eric Farman Date: Fri, 8 Oct 2021 22:38:10 +0200 Subject: [PATCH] s390x: sigp: Force Set Architecture to return Invalid Parameter According to the Principles of Operation, the SIGP Set Architecture order will return Incorrect State if some CPUs are not stopped, but only if the CZAM facility is not present. If it is, the order will return Invalid Parameter because the architecture mode cannot be changed. Since CZAM always exists when S390_FEAT_ZARCH exists, which in turn exists for every defined CPU model, we can simplify this code. Fixes: 075e52b81664 ("s390x/cpumodel: we are always in zarchitecture mode") Signed-off-by: Eric Farman Reviewed-by: Christian Borntraeger Reviewed-by: Janosch Frank Message-Id: <20211008203811.1980478-2-farman@linux.ibm.com> Reviewed-by: Thomas Huth Reviewed-by: David Hildenbrand Signed-off-by: Thomas Huth --- target/s390x/sigp.c | 18 +----------------- 1 file changed, 1 insertion(+), 17 deletions(-) diff --git a/target/s390x/sigp.c b/target/s390x/sigp.c index d57427ced8..51c727834c 100644 --- a/target/s390x/sigp.c +++ b/target/s390x/sigp.c @@ -428,26 +428,10 @@ static int handle_sigp_single_dst(S390CPU *cpu, S390CPU *dst_cpu, uint8_t order, static int sigp_set_architecture(S390CPU *cpu, uint32_t param, uint64_t *status_reg) { - CPUState *cur_cs; - S390CPU *cur_cpu; - bool all_stopped = true; - - CPU_FOREACH(cur_cs) { - cur_cpu = S390_CPU(cur_cs); - - if (cur_cpu == cpu) { - continue; - } - if (s390_cpu_get_state(cur_cpu) != S390_CPU_STATE_STOPPED) { - all_stopped = false; - } - } - *status_reg &= 0xffffffff00000000ULL; /* Reject set arch order, with czam we're always in z/Arch mode. */ - *status_reg |= (all_stopped ? SIGP_STAT_INVALID_PARAMETER : - SIGP_STAT_INCORRECT_STATE); + *status_reg |= SIGP_STAT_INVALID_PARAMETER; return SIGP_CC_STATUS_STORED; }