From 9cb805fd2674f474d058fee6d7aa9e83fcd3d336 Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Wed, 20 Aug 2014 22:16:33 +1000 Subject: cpus: Define callback for QEMU "nmi" command This introduces an NMI (Non Maskable Interrupt) interface with a single nmi_monitor_handler() method. A machine or a device can implement it. This searches for an QOM object with this interface and if it is implemented, calls it. The callback implements an action required to cause debug crash dump on in-kernel debugger invocation. The callback returns Error**. This adds a nmi_monitor_handle() helper which walks through all objects to find the interface. The interface method is called for all found instances. This adds support for it in qmp_inject_nmi(). Since no architecture supports it at the moment, there is no change in behaviour. This changes inject-nmi command description for HMP and QMP. Signed-off-by: Alexey Kardashevskiy Reviewed-by: Alexander Graf Signed-off-by: Paolo Bonzini --- hw/core/Makefile.objs | 1 + hw/core/nmi.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 85 insertions(+) create mode 100644 hw/core/nmi.c (limited to 'hw') diff --git a/hw/core/Makefile.objs b/hw/core/Makefile.objs index 5377d05..17845df 100644 --- a/hw/core/Makefile.objs +++ b/hw/core/Makefile.objs @@ -4,6 +4,7 @@ common-obj-y += fw-path-provider.o # irq.o needed for qdev GPIO handling: common-obj-y += irq.o common-obj-y += hotplug.o +common-obj-y += nmi.o common-obj-$(CONFIG_EMPTY_SLOT) += empty_slot.o common-obj-$(CONFIG_XILINX_AXI) += stream.o diff --git a/hw/core/nmi.c b/hw/core/nmi.c new file mode 100644 index 0000000..3dff020 --- /dev/null +++ b/hw/core/nmi.c @@ -0,0 +1,84 @@ +/* + * NMI monitor handler class and helpers. + * + * Copyright IBM Corp., 2014 + * + * Author: Alexey Kardashevskiy + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, + * or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ + +#include "hw/nmi.h" +#include "qapi/qmp/qerror.h" + +struct do_nmi_s { + int cpu_index; + Error *errp; + bool handled; +}; + +static void nmi_children(Object *o, struct do_nmi_s *ns); + +static int do_nmi(Object *o, void *opaque) +{ + struct do_nmi_s *ns = opaque; + NMIState *n = (NMIState *) object_dynamic_cast(o, TYPE_NMI); + + if (n) { + NMIClass *nc = NMI_GET_CLASS(n); + + ns->handled = true; + nc->nmi_monitor_handler(n, ns->cpu_index, &ns->errp); + if (ns->errp) { + return -1; + } + } + nmi_children(o, ns); + + return 0; +} + +static void nmi_children(Object *o, struct do_nmi_s *ns) +{ + object_child_foreach(o, do_nmi, ns); +} + +void nmi_monitor_handle(int cpu_index, Error **errp) +{ + struct do_nmi_s ns = { + .cpu_index = cpu_index, + .errp = NULL, + .handled = false + }; + + nmi_children(object_get_root(), &ns); + if (ns.handled) { + error_propagate(errp, ns.errp); + } else { + error_set(errp, QERR_UNSUPPORTED); + } +} + +static const TypeInfo nmi_info = { + .name = TYPE_NMI, + .parent = TYPE_INTERFACE, + .class_size = sizeof(NMIClass), +}; + +static void nmi_register_types(void) +{ + type_register_static(&nmi_info); +} + +type_init(nmi_register_types) -- cgit v1.1 From d07aa7c7bb06fdc9973059889b33dfca1d2efe55 Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Wed, 20 Aug 2014 22:16:34 +1000 Subject: s390x: Convert QEMUMachine to MachineClass This converts s390-virtio and s390-ccw-virtio machines to QOM MachineClass. This brings ability to add interfaces to the machine classes. The first interface for addition will be NMI. The patch is mechanical so no change in behavior is expected. Signed-off-by: Alexey Kardashevskiy Reviewed-by: Cornelia Huck Reviewed-by: Alexander Graf Signed-off-by: Paolo Bonzini --- hw/s390x/s390-virtio-ccw.c | 43 +++++++++++++++++++++++++++---------------- hw/s390x/s390-virtio.c | 44 +++++++++++++++++++++++++++----------------- 2 files changed, 54 insertions(+), 33 deletions(-) (limited to 'hw') diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 42f5cec..05311b8 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -18,6 +18,8 @@ #include "css.h" #include "virtio-ccw.h" +#define TYPE_S390_CCW_MACHINE "s390-ccw-machine" + void io_subsystem_reset(void) { DeviceState *css, *sclp, *flic; @@ -134,24 +136,33 @@ static void ccw_init(MachineState *machine) s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw"); } -static QEMUMachine ccw_machine = { - .name = "s390-ccw-virtio", - .alias = "s390-ccw", - .desc = "VirtIO-ccw based S390 machine", - .init = ccw_init, - .block_default_type = IF_VIRTIO, - .no_cdrom = 1, - .no_floppy = 1, - .no_serial = 1, - .no_parallel = 1, - .no_sdcard = 1, - .use_sclp = 1, - .max_cpus = 255, +static void ccw_machine_class_init(ObjectClass *oc, void *data) +{ + MachineClass *mc = MACHINE_CLASS(oc); + + mc->name = "s390-ccw-virtio"; + mc->alias = "s390-ccw"; + mc->desc = "VirtIO-ccw based S390 machine"; + mc->init = ccw_init; + mc->block_default_type = IF_VIRTIO; + mc->no_cdrom = 1; + mc->no_floppy = 1; + mc->no_serial = 1; + mc->no_parallel = 1; + mc->no_sdcard = 1; + mc->use_sclp = 1, + mc->max_cpus = 255; +} + +static const TypeInfo ccw_machine_info = { + .name = TYPE_S390_CCW_MACHINE, + .parent = TYPE_MACHINE, + .class_init = ccw_machine_class_init, }; -static void ccw_machine_init(void) +static void ccw_machine_register_types(void) { - qemu_register_machine(&ccw_machine); + type_register_static(&ccw_machine_info); } -machine_init(ccw_machine_init) +type_init(ccw_machine_register_types) diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c index 93c7ace..f1e0dbc 100644 --- a/hw/s390x/s390-virtio.c +++ b/hw/s390x/s390-virtio.c @@ -51,6 +51,7 @@ #define MAX_BLK_DEVS 10 #define ZIPL_FILENAME "s390-zipl.rom" +#define TYPE_S390_MACHINE "s390-machine" static VirtIOS390Bus *s390_bus; static S390CPU **ipi_states; @@ -279,25 +280,34 @@ static void s390_init(MachineState *machine) s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390"); } -static QEMUMachine s390_machine = { - .name = "s390-virtio", - .alias = "s390", - .desc = "VirtIO based S390 machine", - .init = s390_init, - .block_default_type = IF_VIRTIO, - .no_cdrom = 1, - .no_floppy = 1, - .no_serial = 1, - .no_parallel = 1, - .no_sdcard = 1, - .use_virtcon = 1, - .max_cpus = 255, - .is_default = 1, +static void s390_machine_class_init(ObjectClass *oc, void *data) +{ + MachineClass *mc = MACHINE_CLASS(oc); + + mc->name = "s390-virtio"; + mc->alias = "s390"; + mc->desc = "VirtIO based S390 machine"; + mc->init = s390_init; + mc->block_default_type = IF_VIRTIO; + mc->max_cpus = 255; + mc->no_serial = 1; + mc->no_parallel = 1; + mc->use_virtcon = 1; + mc->no_floppy = 1; + mc->no_cdrom = 1; + mc->no_sdcard = 1; + mc->is_default = 1; +} + +static const TypeInfo s390_machine_info = { + .name = TYPE_S390_MACHINE, + .parent = TYPE_MACHINE, + .class_init = s390_machine_class_init, }; -static void s390_machine_init(void) +static void s390_machine_register_types(void) { - qemu_register_machine(&s390_machine); + type_register_static(&s390_machine_info); } -machine_init(s390_machine_init); +type_init(s390_machine_register_types) -- cgit v1.1 From 3dd7852f1925ec1b3eca32c894e1a84882e145f1 Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Wed, 20 Aug 2014 22:16:35 +1000 Subject: s390x: Migrate to new NMI interface This implements an NMI interface for s390 and s390-ccw machines. This removes #ifdef s390 branch in qmp_inject_nmi so new s390's nmi_monitor_handler() callback is going to be used for NMI. Since nmi_monitor_handler()-calling code is platform independent, CPUState::cpu_index is used instead of S390CPU::env.cpu_num. There should not be any change in behaviour as both @cpu_index and @cpu_num are global CPU numbers. Note that s390_cpu_restart() already takes care of the specified cpu, so we don't need to schedule via async_run_on_cpu(). Since the only error s390_cpu_restart() can return is ENOSYS, convert it to QERR_UNSUPPORTED. Signed-off-by: Alexey Kardashevskiy Reviewed-by: Alexander Graf Reviewed-by: Cornelia Huck Signed-off-by: Paolo Bonzini --- hw/s390x/s390-virtio-ccw.c | 6 ++++++ hw/s390x/s390-virtio.c | 15 +++++++++++++++ hw/s390x/s390-virtio.h | 3 +++ 3 files changed, 24 insertions(+) (limited to 'hw') diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 05311b8..004b2c2 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -139,6 +139,7 @@ static void ccw_init(MachineState *machine) static void ccw_machine_class_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); + NMIClass *nc = NMI_CLASS(oc); mc->name = "s390-ccw-virtio"; mc->alias = "s390-ccw"; @@ -152,12 +153,17 @@ static void ccw_machine_class_init(ObjectClass *oc, void *data) mc->no_sdcard = 1; mc->use_sclp = 1, mc->max_cpus = 255; + nc->nmi_monitor_handler = s390_nmi; } static const TypeInfo ccw_machine_info = { .name = TYPE_S390_CCW_MACHINE, .parent = TYPE_MACHINE, .class_init = ccw_machine_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_NMI }, + { } + }, }; static void ccw_machine_register_types(void) diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c index f1e0dbc..1a75a1c 100644 --- a/hw/s390x/s390-virtio.c +++ b/hw/s390x/s390-virtio.c @@ -280,9 +280,19 @@ static void s390_init(MachineState *machine) s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390"); } +void s390_nmi(NMIState *n, int cpu_index, Error **errp) +{ + CPUState *cs = qemu_get_cpu(cpu_index); + + if (s390_cpu_restart(S390_CPU(cs))) { + error_set(errp, QERR_UNSUPPORTED); + } +} + static void s390_machine_class_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); + NMIClass *nc = NMI_CLASS(oc); mc->name = "s390-virtio"; mc->alias = "s390"; @@ -297,12 +307,17 @@ static void s390_machine_class_init(ObjectClass *oc, void *data) mc->no_cdrom = 1; mc->no_sdcard = 1; mc->is_default = 1; + nc->nmi_monitor_handler = s390_nmi; } static const TypeInfo s390_machine_info = { .name = TYPE_S390_MACHINE, .parent = TYPE_MACHINE, .class_init = s390_machine_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_NMI }, + { } + }, }; static void s390_machine_register_types(void) diff --git a/hw/s390x/s390-virtio.h b/hw/s390x/s390-virtio.h index 5c405e7..33847ae 100644 --- a/hw/s390x/s390-virtio.h +++ b/hw/s390x/s390-virtio.h @@ -12,6 +12,8 @@ #ifndef HW_S390_VIRTIO_H #define HW_S390_VIRTIO_H 1 +#include "hw/nmi.h" + #define KVM_S390_VIRTIO_NOTIFY 0 #define KVM_S390_VIRTIO_RESET 1 #define KVM_S390_VIRTIO_SET_STATUS 2 @@ -26,4 +28,5 @@ void s390_init_ipl_dev(const char *kernel_filename, const char *initrd_filename, const char *firmware); void s390_create_virtio_net(BusState *bus, const char *name); +void s390_nmi(NMIState *n, int cpu_index, Error **errp); #endif -- cgit v1.1 From 3431648272d317ed768fe46183c7a1cea4803732 Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Wed, 20 Aug 2014 22:16:36 +1000 Subject: spapr: Add support for new NMI interface This implements an NMI interface POWERPC SPAPR machine. This enables an "nmi" HMP/QMP command supported on SPAPR. This calls POWERPC_EXCP_RESET (vector 0x100) in the guest to deliver NMI to every CPU. The expected result is XMON (in-kernel debugger) invocation. Signed-off-by: Alexey Kardashevskiy Reviewed-by: Alexander Graf Signed-off-by: Paolo Bonzini --- hw/ppc/spapr.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'hw') diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index d01978f..5cb452f 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -55,6 +55,7 @@ #include "qemu/config-file.h" #include "qemu/error-report.h" #include "trace.h" +#include "hw/nmi.h" #include @@ -1576,10 +1577,28 @@ static void spapr_machine_initfn(Object *obj) spapr_get_kvm_type, spapr_set_kvm_type, NULL); } +static void ppc_cpu_do_nmi_on_cpu(void *arg) +{ + CPUState *cs = arg; + + cpu_synchronize_state(cs); + ppc_cpu_do_system_reset(cs); +} + +static void spapr_nmi(NMIState *n, int cpu_index, Error **errp) +{ + CPUState *cs; + + CPU_FOREACH(cs) { + async_run_on_cpu(cs, ppc_cpu_do_nmi_on_cpu, cs); + } +} + static void spapr_machine_class_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(oc); + NMIClass *nc = NMI_CLASS(oc); mc->name = "pseries"; mc->desc = "pSeries Logical Partition (PAPR compliant)"; @@ -1593,6 +1612,7 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data) mc->kvm_type = spapr_kvm_type; fwc->get_dev_path = spapr_get_fw_dev_path; + nc->nmi_monitor_handler = spapr_nmi; } static const TypeInfo spapr_machine_info = { @@ -1603,6 +1623,7 @@ static const TypeInfo spapr_machine_info = { .class_init = spapr_machine_class_init, .interfaces = (InterfaceInfo[]) { { TYPE_FW_PATH_PROVIDER }, + { TYPE_NMI }, { } }, }; -- cgit v1.1 From 172dbc52b39c86d7569af5251cca78cb2c74c912 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 27 Aug 2014 17:54:52 +0200 Subject: mc146818rtc: reinitialize irq_reinject_on_ack_count on reset This field was forgotten, and it makes the state after reset non-deterministic. Signed-off-by: Paolo Bonzini --- hw/timer/mc146818rtc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'hw') diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c index 233fc70..4df650f 100644 --- a/hw/timer/mc146818rtc.c +++ b/hw/timer/mc146818rtc.c @@ -792,6 +792,7 @@ static void rtc_reset(void *opaque) #ifdef TARGET_I386 if (s->lost_tick_policy == LOST_TICK_POLICY_SLEW) { s->irq_coalesced = 0; + s->irq_reinject_on_ack_count = 0; } #endif } -- cgit v1.1