aba7a5a2de
Since "s390x/tcg: avoid overflows in time2tod/tod2time", the time2tod() function tries to deal with the 9 uppermost bits in the time value, but uses the wrong mask for this: 0xff80000000000000 should be used instead of 0xff10000000000000 here. Fixes: 14055ce53c2d901d826ffad7fb7d6bb8ab46bdfd Cc: qemu-stable@nongnu.org Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1544792887-14575-1-git-send-email-thuth@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> [CH: tweaked commit message] Signed-off-by: Cornelia Huck <cohuck@redhat.com>
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
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* TOD (Time Of Day) clock
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*
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* Copyright 2018 Red Hat, Inc.
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* Author(s): David Hildenbrand <david@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_S390_TOD_H
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#define HW_S390_TOD_H
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#include "hw/qdev.h"
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typedef struct S390TOD {
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uint8_t high;
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uint64_t low;
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} S390TOD;
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#define TYPE_S390_TOD "s390-tod"
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#define S390_TOD(obj) OBJECT_CHECK(S390TODState, (obj), TYPE_S390_TOD)
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#define S390_TOD_CLASS(oc) OBJECT_CLASS_CHECK(S390TODClass, (oc), \
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TYPE_S390_TOD)
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#define S390_TOD_GET_CLASS(obj) OBJECT_GET_CLASS(S390TODClass, (obj), \
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TYPE_S390_TOD)
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#define TYPE_KVM_S390_TOD TYPE_S390_TOD "-kvm"
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#define TYPE_QEMU_S390_TOD TYPE_S390_TOD "-qemu"
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typedef struct S390TODState {
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/* private */
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DeviceState parent_obj;
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/*
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* Used by TCG to remember the time base. Used by KVM to backup the TOD
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* while the TOD is stopped.
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*/
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S390TOD base;
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/* Used by KVM to remember if the TOD is stopped and base is valid. */
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bool stopped;
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} S390TODState;
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typedef struct S390TODClass {
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/* private */
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DeviceClass parent_class;
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void (*parent_realize)(DeviceState *dev, Error **errp);
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/* public */
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void (*get)(const S390TODState *td, S390TOD *tod, Error **errp);
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void (*set)(S390TODState *td, const S390TOD *tod, Error **errp);
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} S390TODClass;
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/* The value of the TOD clock for 1.1.1970. */
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#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
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/* Converts ns to s390's clock format */
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static inline uint64_t time2tod(uint64_t ns)
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{
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return (ns << 9) / 125 + (((ns & 0xff80000000000000ull) / 125) << 9);
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}
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/* Converts s390's clock format to ns */
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static inline uint64_t tod2time(uint64_t t)
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{
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return ((t >> 9) * 125) + (((t & 0x1ff) * 125) >> 9);
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}
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void s390_init_tod(void);
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S390TODState *s390_get_todstate(void);
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#endif
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