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From cd7da3cf1b19fef0a497fd556562040a85e579a7 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Fri, 29 May 2020 05:53:57 -0400
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Subject: [PATCH 15/42] s390/sclp: improve special wait psw logic
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20200529055420.16855-16-thuth@redhat.com>
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Patchwork-id: 97037
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O-Subject: [RHEL-8.3.0 qemu-kvm PATCH v2 15/38] s390/sclp: improve special wait psw logic
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Bugzilla: 1828317
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RH-Acked-by: Claudio Imbrenda <cimbrend@redhat.com>
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@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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There is a special quiesce PSW that we check for "shutdown". Otherwise disabled
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wait is detected as "crashed". Architecturally we must only check PSW bits
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116-127. Fix this.
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Message-Id: <1582204582-22995-1-git-send-email-borntraeger@de.ibm.com>
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Reviewed-by: David Hildenbrand <david@redhat.com>
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Acked-by: Janosch Frank <frankja@linux.ibm.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 8b51c0961cc13e55b26bb6665ec3a341abdc7658)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/s390x/helper.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/target/s390x/helper.c b/target/s390x/helper.c
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index a3a49164e4..6808dfda01 100644
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--- a/target/s390x/helper.c
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+++ b/target/s390x/helper.c
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@@ -89,7 +89,7 @@ hwaddr s390_cpu_get_phys_addr_debug(CPUState *cs, vaddr vaddr)
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static inline bool is_special_wait_psw(uint64_t psw_addr)
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{
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/* signal quiesce */
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- return psw_addr == 0xfffUL;
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+ return (psw_addr & 0xfffUL) == 0xfffUL;
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}
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void s390_handle_wait(S390CPU *cpu)
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--
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2.27.0
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