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From 91995f02cd4c100d26edd6df3dae0813b8685c02 Mon Sep 17 00:00:00 2001
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From: David Hildenbrand <david@redhat.com>
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Date: Fri, 21 Dec 2018 15:36:08 +0000
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Subject: [PATCH 06/22] s390x/tcg: SET CLOCK COMPARATOR can clear CKC
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interrupts
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RH-Author: David Hildenbrand <david@redhat.com>
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Message-id: <20181221153614.27961-7-david@redhat.com>
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Patchwork-id: 83750
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O-Subject: [RHEL-8.0 qemu-kvm v2 PATCH 06/12] s390x/tcg: SET CLOCK COMPARATOR can clear CKC interrupts
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Bugzilla: 1653569
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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Let's stop the timer and delete any pending CKC IRQ before doing
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anything else.
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While at it, add a comment why the check for ckc == -1ULL is needed.
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Reviewed-by: Thomas Huth <thuth@redhat.com>
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Signed-off-by: David Hildenbrand <david@redhat.com>
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Message-Id: <20180627134410.4901-7-david@redhat.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 345f1ab96e8279a537f32ae7447296d23308c7d1)
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Signed-off-by: David Hildenbrand <david@redhat.com>
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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/misc_helper.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
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index 4f675c7..cada7af 100644
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--- a/target/s390x/misc_helper.c
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+++ b/target/s390x/misc_helper.c
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@@ -155,6 +155,13 @@ void HELPER(sckc)(CPUS390XState *env, uint64_t time)
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{
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S390TODState *td = s390_get_todstate();
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+ /* stop the timer and remove pending CKC IRQs */
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+ timer_del(env->tod_timer);
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+ qemu_mutex_lock_iothread();
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+ env->pending_int &= ~INTERRUPT_EXT_CLOCK_COMPARATOR;
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+ qemu_mutex_unlock_iothread();
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+
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+ /* the tod has to exceed the ckc, this can never happen if ckc is all 1's */
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if (time == -1ULL) {
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return;
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}
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--
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1.8.3.1
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