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Re: [PATCH 1/5] hw/nmi: Have nmi_monitor_handler() return a boolean indi
From: |
Markus Armbruster |
Subject: |
Re: [PATCH 1/5] hw/nmi: Have nmi_monitor_handler() return a boolean indicating error |
Date: |
Thu, 23 Feb 2023 16:26:14 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Philippe Mathieu-Daudé <philmd@linaro.org> writes:
> Following the example documented since commit e3fe3988d7 ("error:
> Document Error API usage rules"), have the nmi_monitor_handler
> return a boolean indicating whether an error is set or not and
> convert its implementations.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
> hw/core/nmi.c | 3 +--
> hw/hppa/machine.c | 3 ++-
> hw/i386/x86.c | 3 ++-
> hw/intc/m68k_irqc.c | 4 +++-
> hw/m68k/q800.c | 4 +++-
> hw/misc/macio/gpio.c | 4 +++-
> hw/ppc/pnv.c | 3 ++-
> hw/ppc/spapr.c | 3 ++-
> hw/s390x/s390-virtio-ccw.c | 4 +++-
> include/hw/nmi.h | 3 ++-
> 10 files changed, 23 insertions(+), 11 deletions(-)
>
> diff --git a/hw/core/nmi.c b/hw/core/nmi.c
> index 481c4b3c7e..76cb3ba3b0 100644
> --- a/hw/core/nmi.c
> +++ b/hw/core/nmi.c
> @@ -43,8 +43,7 @@ static int do_nmi(Object *o, void *opaque)
> NMIClass *nc = NMI_GET_CLASS(n);
>
> ns->handled = true;
> - nc->nmi_monitor_handler(n, ns->cpu_index, &ns->err);
> - if (ns->err) {
> + if (!nc->nmi_monitor_handler(n, ns->cpu_index, &ns->err)) {
> return -1;
> }
> }
> diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
> index 7ac68c943f..da7c36c554 100644
> --- a/hw/hppa/machine.c
> +++ b/hw/hppa/machine.c
> @@ -437,13 +437,14 @@ static void hppa_machine_reset(MachineState *ms,
> ShutdownCause reason)
> cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
> }
>
> -static void hppa_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool hppa_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> CPUState *cs;
>
> CPU_FOREACH(cs) {
> cpu_interrupt(cs, CPU_INTERRUPT_NMI);
> }
> + return true;
> }
>
> static void hppa_machine_init_class_init(ObjectClass *oc, void *data)
> diff --git a/hw/i386/x86.c b/hw/i386/x86.c
> index eaff4227bd..8bd0691705 100644
> --- a/hw/i386/x86.c
> +++ b/hw/i386/x86.c
> @@ -501,7 +501,7 @@ const CPUArchIdList
> *x86_possible_cpu_arch_ids(MachineState *ms)
> return ms->possible_cpus;
> }
>
> -static void x86_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool x86_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> /* cpu index isn't used */
> CPUState *cs;
> @@ -515,6 +515,7 @@ static void x86_nmi(NMIState *n, int cpu_index, Error
> **errp)
> apic_deliver_nmi(cpu->apic_state);
> }
> }
> + return true;
> }
>
> static long get_file_size(FILE *f)
> diff --git a/hw/intc/m68k_irqc.c b/hw/intc/m68k_irqc.c
> index 0c515e4ecb..e05083e756 100644
> --- a/hw/intc/m68k_irqc.c
> +++ b/hw/intc/m68k_irqc.c
> @@ -70,9 +70,11 @@ static void m68k_irqc_instance_init(Object *obj)
> qdev_init_gpio_in(DEVICE(obj), m68k_set_irq, M68K_IRQC_LEVEL_NUM);
> }
>
> -static void m68k_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool m68k_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> m68k_set_irq(n, M68K_IRQC_LEVEL_7, 1);
> +
> + return true;
> }
>
> static const VMStateDescription vmstate_m68k_irqc = {
> diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c
> index 9d52ca6613..8631a226cd 100644
> --- a/hw/m68k/q800.c
> +++ b/hw/m68k/q800.c
> @@ -227,13 +227,15 @@ static void glue_auxmode_set_irq(void *opaque, int irq,
> int level)
> s->auxmode = level;
> }
>
> -static void glue_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool glue_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> GLUEState *s = GLUE(n);
>
> /* Hold NMI active for 100ms */
> GLUE_set_irq(s, GLUE_IRQ_IN_NMI, 1);
> timer_mod(s->nmi_release, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 100);
> +
> + return true;
> }
>
> static void glue_nmi_release(void *opaque)
> diff --git a/hw/misc/macio/gpio.c b/hw/misc/macio/gpio.c
> index c8ac5633b2..0a7214421c 100644
> --- a/hw/misc/macio/gpio.c
> +++ b/hw/misc/macio/gpio.c
> @@ -182,10 +182,12 @@ static void macio_gpio_reset(DeviceState *dev)
> macio_set_gpio(s, 1, true);
> }
>
> -static void macio_gpio_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool macio_gpio_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> macio_set_gpio(MACIO_GPIO(n), 9, true);
> macio_set_gpio(MACIO_GPIO(n), 9, false);
> +
> + return true;
> }
>
> static void macio_gpio_class_init(ObjectClass *oc, void *data)
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index 44b1fbbc93..38e69f3b39 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -2309,13 +2309,14 @@ static void pnv_cpu_do_nmi_on_cpu(CPUState *cs,
> run_on_cpu_data arg)
> }
> }
>
> -static void pnv_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool pnv_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> CPUState *cs;
>
> CPU_FOREACH(cs) {
> async_run_on_cpu(cs, pnv_cpu_do_nmi_on_cpu, RUN_ON_CPU_NULL);
> }
> + return true;
> }
>
> static void pnv_machine_class_init(ObjectClass *oc, void *data)
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 4921198b9d..d298068169 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -3464,13 +3464,14 @@ void spapr_do_system_reset_on_cpu(CPUState *cs,
> run_on_cpu_data arg)
> }
> }
>
> -static void spapr_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool spapr_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> CPUState *cs;
>
> CPU_FOREACH(cs) {
> async_run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL);
> }
> + return true;
> }
>
> int spapr_lmb_dt_populate(SpaprDrc *drc, SpaprMachineState *spapr,
> diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
> index f22f61b8b6..af7e6c632a 100644
> --- a/hw/s390x/s390-virtio-ccw.c
> +++ b/hw/s390x/s390-virtio-ccw.c
> @@ -570,11 +570,13 @@ static HotplugHandler
> *s390_get_hotplug_handler(MachineState *machine,
> return NULL;
> }
>
> -static void s390_nmi(NMIState *n, int cpu_index, Error **errp)
> +static bool s390_nmi(NMIState *n, int cpu_index, Error **errp)
> {
> CPUState *cs = qemu_get_cpu(cpu_index);
>
> s390_cpu_restart(S390_CPU(cs));
> +
> + return true;
> }
>
> static ram_addr_t s390_fixup_ram_size(ram_addr_t sz)
> diff --git a/include/hw/nmi.h b/include/hw/nmi.h
> index fff41bebc6..3e827a254a 100644
> --- a/include/hw/nmi.h
> +++ b/include/hw/nmi.h
> @@ -37,7 +37,8 @@ typedef struct NMIState NMIState;
> struct NMIClass {
> InterfaceClass parent_class;
>
> - void (*nmi_monitor_handler)(NMIState *n, int cpu_index, Error **errp);
> + /** Returns: %true on success, %false on error. */
> + bool (*nmi_monitor_handler)(NMIState *n, int cpu_index, Error **errp);
> };
>
> void nmi_monitor_handle(int cpu_index, Error **errp);
None of the handlers can actually fail. Evidence: you add only return
true, never return false. Correct (I checked).
I think I'd make it official and drop the handler's Error ** parameter
instead of changing its return type.
You decide.
Reviewed-by: Markus Armbruster <armbru@redhat.com>
- [PATCH 0/5] bulk: Have object_child_foreach() take Error* and return boolean, Philippe Mathieu-Daudé, 2023/02/16
- [PATCH 1/5] hw/nmi: Have nmi_monitor_handler() return a boolean indicating error, Philippe Mathieu-Daudé, 2023/02/16
- Re: [PATCH 1/5] hw/nmi: Have nmi_monitor_handler() return a boolean indicating error,
Markus Armbruster <=
- [PATCH 2/5] spapr/ddw: Remove confuse return value in spapr_phb_get_free_liobn(), Philippe Mathieu-Daudé, 2023/02/16
- [RFC PATCH 4/5] hw/nmi: Simplify nmi_monitor_handle() and do_nmi(), Philippe Mathieu-Daudé, 2023/02/16
- [PATCH 3/5] bulk: Have object_child_foreach() take Error* and return boolean, Philippe Mathieu-Daudé, 2023/02/16
- [RFC PATCH 5/5] hw/ppc/pnv_bmc: Simplify pnv_bmc_find(), Philippe Mathieu-Daudé, 2023/02/16