From cd498a086077cab11fbc695336db52ba819201bd Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Fri, 21 Dec 2018 15:36:05 +0000 Subject: [PATCH 03/22] s390x/tod: factor out TOD into separate device RH-Author: David Hildenbrand Message-id: <20181221153614.27961-4-david@redhat.com> Patchwork-id: 83749 O-Subject: [RHEL-8.0 qemu-kvm v2 PATCH 03/12] s390x/tod: factor out TOD into separate device Bugzilla: 1653569 RH-Acked-by: Cornelia Huck RH-Acked-by: Thomas Huth RH-Acked-by: Laurent Vivier Signed-off-by: Danilo C. L. de Paula Conflicts: hw/s390x/s390-virtio-ccw.c: contextual conflict (console init rework) Let's treat this like a separate device. TCG will have to store the actual state/time later on. Include cpu-qom.h in kvm_s390x.h (due to S390CPU) to compile tod-kvm.c. Reviewed-by: Thomas Huth Signed-off-by: David Hildenbrand Message-Id: <20180627134410.4901-4-david@redhat.com> Signed-off-by: Cornelia Huck (cherry picked from commit 8046f374a64b81fdf4f71f7a433bf4035d501521) Signed-off-by: David Hildenbrand Signed-off-by: Danilo C. L. de Paula --- hw/s390x/Makefile.objs | 3 ++ hw/s390x/s390-virtio-ccw.c | 57 ++-------------------- hw/s390x/tod-kvm.c | 64 ++++++++++++++++++++++++ hw/s390x/tod-qemu.c | 49 +++++++++++++++++++ hw/s390x/tod.c | 119 +++++++++++++++++++++++++++++++++++++++++++++ include/hw/s390x/tod.h | 46 ++++++++++++++++++ target/s390x/cpu.c | 32 ------------ target/s390x/cpu.h | 2 - target/s390x/kvm_s390x.h | 2 + 9 files changed, 286 insertions(+), 88 deletions(-) create mode 100644 hw/s390x/tod-kvm.c create mode 100644 hw/s390x/tod-qemu.c create mode 100644 hw/s390x/tod.c create mode 100644 include/hw/s390x/tod.h diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs index 655d1ac..add89b1 100644 --- a/hw/s390x/Makefile.objs +++ b/hw/s390x/Makefile.objs @@ -14,6 +14,9 @@ obj-$(CONFIG_PCI) += s390-pci-bus.o s390-pci-inst.o obj-$(call lnot,$(CONFIG_PCI)) += s390-pci-stub.o obj-y += s390-skeys.o obj-y += s390-stattrib.o +obj-y += tod.o +obj-$(CONFIG_KVM) += tod-kvm.o +obj-$(CONFIG_TCG) += tod-qemu.o obj-$(CONFIG_KVM) += s390-skeys-kvm.o obj-$(CONFIG_KVM) += s390-stattrib-kvm.o obj-y += s390-ccw.o diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 43a8213..8f93edc 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -36,6 +36,7 @@ #include "migration/register.h" #include "cpu_models.h" #include "hw/nmi.h" +#include "hw/s390x/tod.h" S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) { @@ -188,58 +189,6 @@ static void s390_memory_init(ram_addr_t mem_size) s390_stattrib_init(); } -#define S390_TOD_CLOCK_VALUE_MISSING 0x00 -#define S390_TOD_CLOCK_VALUE_PRESENT 0x01 - -static void gtod_save(QEMUFile *f, void *opaque) -{ - uint64_t tod_low; - uint8_t tod_high; - int r; - - r = s390_get_clock(&tod_high, &tod_low); - if (r) { - warn_report("Unable to get guest clock for migration: %s", - strerror(-r)); - error_printf("Guest clock will not be migrated " - "which could cause the guest to hang."); - qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING); - return; - } - - qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT); - qemu_put_byte(f, tod_high); - qemu_put_be64(f, tod_low); -} - -static int gtod_load(QEMUFile *f, void *opaque, int version_id) -{ - uint64_t tod_low; - uint8_t tod_high; - int r; - - if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) { - warn_report("Guest clock was not migrated. This could " - "cause the guest to hang."); - return 0; - } - - tod_high = qemu_get_byte(f); - tod_low = qemu_get_be64(f); - - r = s390_set_clock(&tod_high, &tod_low); - if (r) { - error_report("Unable to set KVM guest TOD clock: %s", strerror(-r)); - } - - return r; -} - -static SaveVMHandlers savevm_gtod = { - .save_state = gtod_save, - .load_state = gtod_load, -}; - static void s390_init_ipl_dev(const char *kernel_filename, const char *kernel_cmdline, const char *initrd_filename, const char *firmware, @@ -350,8 +299,8 @@ static void ccw_init(MachineState *machine) /* Create VirtIO network adapters */ s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw"); - /* Register savevm handler for guest TOD clock */ - register_savevm_live(NULL, "todclock", 0, 1, &savevm_gtod, NULL); + /* init the TOD clock */ + s390_init_tod(); } static void s390_cpu_plug(HotplugHandler *hotplug_dev, diff --git a/hw/s390x/tod-kvm.c b/hw/s390x/tod-kvm.c new file mode 100644 index 0000000..df564ab --- /dev/null +++ b/hw/s390x/tod-kvm.c @@ -0,0 +1,64 @@ +/* + * TOD (Time Of Day) clock - KVM implementation + * + * Copyright 2018 Red Hat, Inc. + * Author(s): David Hildenbrand + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "hw/s390x/tod.h" +#include "kvm_s390x.h" + +static void kvm_s390_tod_get(const S390TODState *td, S390TOD *tod, Error **errp) +{ + int r; + + r = kvm_s390_get_clock_ext(&tod->high, &tod->low); + if (r == -ENXIO) { + r = kvm_s390_get_clock(&tod->high, &tod->low); + } + if (r) { + error_setg(errp, "Unable to get KVM guest TOD clock: %s", + strerror(-r)); + } +} + +static void kvm_s390_tod_set(S390TODState *td, const S390TOD *tod, Error **errp) +{ + int r; + + r = kvm_s390_set_clock_ext(tod->high, tod->low); + if (r == -ENXIO) { + r = kvm_s390_set_clock(tod->high, tod->low); + } + if (r) { + error_setg(errp, "Unable to set KVM guest TOD clock: %s", + strerror(-r)); + } +} + +static void kvm_s390_tod_class_init(ObjectClass *oc, void *data) +{ + S390TODClass *tdc = S390_TOD_CLASS(oc); + + tdc->get = kvm_s390_tod_get; + tdc->set = kvm_s390_tod_set; +} + +static TypeInfo kvm_s390_tod_info = { + .name = TYPE_KVM_S390_TOD, + .parent = TYPE_S390_TOD, + .instance_size = sizeof(S390TODState), + .class_init = kvm_s390_tod_class_init, + .class_size = sizeof(S390TODClass), +}; + +static void register_types(void) +{ + type_register_static(&kvm_s390_tod_info); +} +type_init(register_types); diff --git a/hw/s390x/tod-qemu.c b/hw/s390x/tod-qemu.c new file mode 100644 index 0000000..03ea1ce --- /dev/null +++ b/hw/s390x/tod-qemu.c @@ -0,0 +1,49 @@ +/* + * TOD (Time Of Day) clock - QEMU implementation + * + * Copyright 2018 Red Hat, Inc. + * Author(s): David Hildenbrand + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "hw/s390x/tod.h" + +static void qemu_s390_tod_get(const S390TODState *td, S390TOD *tod, + Error **errp) +{ + /* FIXME */ + tod->high = 0; + tod->low = 0; +} + +static void qemu_s390_tod_set(S390TODState *td, const S390TOD *tod, + Error **errp) +{ + /* FIXME */ +} + +static void qemu_s390_tod_class_init(ObjectClass *oc, void *data) +{ + S390TODClass *tdc = S390_TOD_CLASS(oc); + + tdc->get = qemu_s390_tod_get; + tdc->set = qemu_s390_tod_set; +} + +static TypeInfo qemu_s390_tod_info = { + .name = TYPE_QEMU_S390_TOD, + .parent = TYPE_S390_TOD, + .instance_size = sizeof(S390TODState), + .class_init = qemu_s390_tod_class_init, + .class_size = sizeof(S390TODClass), +}; + +static void register_types(void) +{ + type_register_static(&qemu_s390_tod_info); +} +type_init(register_types); diff --git a/hw/s390x/tod.c b/hw/s390x/tod.c new file mode 100644 index 0000000..0501aff --- /dev/null +++ b/hw/s390x/tod.c @@ -0,0 +1,119 @@ +/* + * TOD (Time Of Day) clock + * + * Copyright 2018 Red Hat, Inc. + * Author(s): David Hildenbrand + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "hw/s390x/tod.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "sysemu/kvm.h" +#include "migration/register.h" + +void s390_init_tod(void) +{ + Object *obj; + + if (kvm_enabled()) { + obj = object_new(TYPE_KVM_S390_TOD); + } else { + obj = object_new(TYPE_QEMU_S390_TOD); + } + object_property_add_child(qdev_get_machine(), TYPE_S390_TOD, obj, NULL); + object_unref(obj); + + qdev_init_nofail(DEVICE(obj)); +} + +#define S390_TOD_CLOCK_VALUE_MISSING 0x00 +#define S390_TOD_CLOCK_VALUE_PRESENT 0x01 + +static void s390_tod_save(QEMUFile *f, void *opaque) +{ + S390TODState *td = opaque; + S390TODClass *tdc = S390_TOD_GET_CLASS(td); + Error *err = NULL; + S390TOD tod; + + tdc->get(td, &tod, &err); + if (err) { + warn_report_err(err); + error_printf("Guest clock will not be migrated " + "which could cause the guest to hang."); + qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING); + return; + } + + qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT); + qemu_put_byte(f, tod.high); + qemu_put_be64(f, tod.low); +} + +static int s390_tod_load(QEMUFile *f, void *opaque, int version_id) +{ + S390TODState *td = opaque; + S390TODClass *tdc = S390_TOD_GET_CLASS(td); + Error *err = NULL; + S390TOD tod; + + if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) { + warn_report("Guest clock was not migrated. This could " + "cause the guest to hang."); + return 0; + } + + tod.high = qemu_get_byte(f); + tod.low = qemu_get_be64(f); + + tdc->set(td, &tod, &err); + if (err) { + error_report_err(err); + return -1; + } + return 0; +} + +static SaveVMHandlers savevm_tod = { + .save_state = s390_tod_save, + .load_state = s390_tod_load, +}; + +static void s390_tod_realize(DeviceState *dev, Error **errp) +{ + S390TODState *td = S390_TOD(dev); + + /* Legacy migration interface */ + register_savevm_live(NULL, "todclock", 0, 1, &savevm_tod, td); +} + +static void s390_tod_class_init(ObjectClass *oc, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(oc); + + dc->desc = "TOD (Time Of Day) Clock"; + dc->realize = s390_tod_realize; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); + + /* We only have one TOD clock in the system attached to the machine */ + dc->user_creatable = false; +} + +static TypeInfo s390_tod_info = { + .name = TYPE_S390_TOD, + .parent = TYPE_DEVICE, + .instance_size = sizeof(S390TODState), + .class_init = s390_tod_class_init, + .class_size = sizeof(S390TODClass), + .abstract = true, +}; + +static void register_types(void) +{ + type_register_static(&s390_tod_info); +} +type_init(register_types); diff --git a/include/hw/s390x/tod.h b/include/hw/s390x/tod.h new file mode 100644 index 0000000..7096b57 --- /dev/null +++ b/include/hw/s390x/tod.h @@ -0,0 +1,46 @@ +/* + * TOD (Time Of Day) clock + * + * Copyright 2018 Red Hat, Inc. + * Author(s): David Hildenbrand + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef HW_S390_TOD_H +#define HW_S390_TOD_H + +#include "hw/qdev.h" + +typedef struct S390TOD { + uint8_t high; + uint64_t low; +} S390TOD; + +#define TYPE_S390_TOD "s390-tod" +#define S390_TOD(obj) OBJECT_CHECK(S390TODState, (obj), TYPE_S390_TOD) +#define S390_TOD_CLASS(oc) OBJECT_CLASS_CHECK(S390TODClass, (oc), \ + TYPE_S390_TOD) +#define S390_TOD_GET_CLASS(obj) OBJECT_GET_CLASS(S390TODClass, (obj), \ + TYPE_S390_TOD) +#define TYPE_KVM_S390_TOD TYPE_S390_TOD "-kvm" +#define TYPE_QEMU_S390_TOD TYPE_S390_TOD "-qemu" + +typedef struct S390TODState { + /* private */ + DeviceState parent_obj; +} S390TODState; + +typedef struct S390TODClass { + /* private */ + DeviceClass parent_class; + + /* public */ + void (*get)(const S390TODState *td, S390TOD *tod, Error **errp); + void (*set)(S390TODState *td, const S390TOD *tod, Error **errp); +} S390TODClass; + +void s390_init_tod(void); + +#endif diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c index 1f590d1..167d089 100644 --- a/target/s390x/cpu.c +++ b/target/s390x/cpu.c @@ -391,38 +391,6 @@ unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu) return s390_count_running_cpus(); } -int s390_get_clock(uint8_t *tod_high, uint64_t *tod_low) -{ - int r = 0; - - if (kvm_enabled()) { - r = kvm_s390_get_clock_ext(tod_high, tod_low); - if (r == -ENXIO) { - return kvm_s390_get_clock(tod_high, tod_low); - } - } else { - /* Fixme TCG */ - *tod_high = 0; - *tod_low = 0; - } - - return r; -} - -int s390_set_clock(uint8_t *tod_high, uint64_t *tod_low) -{ - int r = 0; - - if (kvm_enabled()) { - r = kvm_s390_set_clock_ext(*tod_high, *tod_low); - if (r == -ENXIO) { - return kvm_s390_set_clock(*tod_high, *tod_low); - } - } - /* Fixme TCG */ - return r; -} - int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit) { if (kvm_enabled()) { diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 86d08fa..67118c8 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -691,8 +691,6 @@ static inline uint64_t s390_build_validity_mcic(void) /* cpu.c */ -int s390_get_clock(uint8_t *tod_high, uint64_t *tod_low); -int s390_set_clock(uint8_t *tod_high, uint64_t *tod_low); void s390_crypto_reset(void); bool s390_get_squash_mcss(void); int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit); diff --git a/target/s390x/kvm_s390x.h b/target/s390x/kvm_s390x.h index 36eb34b..6e52287 100644 --- a/target/s390x/kvm_s390x.h +++ b/target/s390x/kvm_s390x.h @@ -10,6 +10,8 @@ #ifndef KVM_S390X_H #define KVM_S390X_H +#include "cpu-qom.h" + struct kvm_s390_irq; void kvm_s390_floating_interrupt_legacy(struct kvm_s390_irq *irq); -- 1.8.3.1