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From 8b994757136780998e0dd1d41613d2006c0dbcf6 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Tue, 4 Aug 2020 10:16:04 -0400
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Subject: [PATCH 4/4] s390x/protvirt: allow to IPL secure guests with
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-no-reboot
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20200804101604.6259-2-thuth@redhat.com>
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Patchwork-id: 98126
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O-Subject: [RHEL-8.3.0 qemu-kvm PATCH 1/1] s390x/protvirt: allow to IPL secure guests with -no-reboot
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Bugzilla: 1863034
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RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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From: Christian Borntraeger <borntraeger@de.ibm.com>
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Right now, -no-reboot prevents secure guests from running. This is
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correct from an implementation point of view, as we have modeled the
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transition from non-secure to secure as a program directed IPL. From
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a user perspective, this is not the behavior of least surprise.
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We should implement the IPL into protected mode similar to the
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functions that we use for kdump/kexec. In other words, we do not stop
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here when -no-reboot is specified on the command line. Like function 0
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or function 1, function 10 is not a classic reboot. For example, it
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can only be called once. Before calling it a second time, a real
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reboot/reset must happen in-between. So function code 10 is more or
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less a state transition reset, but not a "standard" reset or reboot.
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Fixes: 4d226deafc44 ("s390x: protvirt: Support unpack facility")
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Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
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Reviewed-by: David Hildenbrand <david@redhat.com>
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Acked-by: Viktor Mihajlovski <mihajlov@linux.ibm.com>
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Message-Id: <20200721103202.30610-1-borntraeger@de.ibm.com>
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[CH: tweaked description]
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit d1bb69db4ceb6897ef6a17bf263146b53a123632)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/s390x/ipl.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
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index 586d95b5b6..5b3ea990af 100644
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--- a/hw/s390x/ipl.c
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+++ b/hw/s390x/ipl.c
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@@ -624,7 +624,8 @@ void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
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}
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}
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if (reset_type == S390_RESET_MODIFIED_CLEAR ||
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- reset_type == S390_RESET_LOAD_NORMAL) {
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+ reset_type == S390_RESET_LOAD_NORMAL ||
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+ reset_type == S390_RESET_PV) {
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/* ignore -no-reboot, send no event */
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qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
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} else {
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--
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2.27.0
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