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s390/kvm: fix diag318 propagation and reset functionality

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The Control Program Name Code (CPNC) portion of the diag318
info must be set within the SIE block of each VCPU in the
configuration. The handler will iterate through each VCPU
and dirty the diag318_info reg to be synced with KVM on a
subsequent sync_regs call.

Additionally, the diag318 info resets must be handled via
userspace. As such, QEMU will reset this value for each
VCPU during a modified clear, load normal, and load clear
reset event.

Fixes: fabdada935 ("s390: guest support for diagnose 0x318")
Signed-off-by: Collin Walling <walling@linux.ibm.com>
Message-Id: <20201113221022.257054-1-walling@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Janosch Frank <frankja@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Collin Walling 2020-11-13 17:10:22 -05:00 • committed by Cornelia Huck
parent b696f2c6ba
commit e2c6cd5674
6 changed files with 34 additions and 5 deletions
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4
hw/s390x/s390-virtio-ccw.c
View file

@ -486,6 +486,10 @@ static void s390_machine_reset(MachineState *machine)
default:
g_assert_not_reached();
}
CPU_FOREACH(t) {
run_on_cpu(t, s390_do_cpu_set_diag318, RUN_ON_CPU_HOST_ULONG(0));
}
s390_ipl_clear_reset_request();
}