| Message ID | 20201120234208.683521-9-groug@kaod.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | spapr: Perform hotplug sanity checks at pre-plug | expand |
On Sat, Nov 21, 2020 at 12:42:07AM +0100, Greg Kurz wrote: > There can be only one TPM proxy at a time. This is currently > checked at plug time. But this can be detected at pre-plug in > order to error out earlier. > > This allows to get rid of error handling in the plug handler. > > Signed-off-by: Greg Kurz <groug@kaod.org> Applied to ppc-for-6.0, thanks. > --- > hw/ppc/spapr.c | 23 ++++++++++++++++++----- > 1 file changed, 18 insertions(+), 5 deletions(-) > > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c > index bded059d59c8..5e32d1d396b4 100644 > --- a/hw/ppc/spapr.c > +++ b/hw/ppc/spapr.c > @@ -3957,17 +3957,28 @@ static void spapr_phb_unplug_request(HotplugHandler *hotplug_dev, > } > } > > -static void spapr_tpm_proxy_plug(HotplugHandler *hotplug_dev, DeviceState *dev, > - Error **errp) > +static > +bool spapr_tpm_proxy_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, > + Error **errp) > { > SpaprMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev)); > - SpaprTpmProxy *tpm_proxy = SPAPR_TPM_PROXY(dev); > > if (spapr->tpm_proxy != NULL) { > error_setg(errp, "Only one TPM proxy can be specified for this machine"); > - return; > + return false; > } > > + return true; > +} > + > +static void spapr_tpm_proxy_plug(HotplugHandler *hotplug_dev, DeviceState *dev) > +{ > + SpaprMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev)); > + SpaprTpmProxy *tpm_proxy = SPAPR_TPM_PROXY(dev); > + > + /* Already checked in spapr_tpm_proxy_pre_plug() */ > + g_assert(spapr->tpm_proxy == NULL); > + > spapr->tpm_proxy = tpm_proxy; > } > > @@ -3990,7 +4001,7 @@ static void spapr_machine_device_plug(HotplugHandler *hotplug_dev, > } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) { > spapr_phb_plug(hotplug_dev, dev); > } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_TPM_PROXY)) { > - spapr_tpm_proxy_plug(hotplug_dev, dev, errp); > + spapr_tpm_proxy_plug(hotplug_dev, dev); > } > } > > @@ -4053,6 +4064,8 @@ static void spapr_machine_device_pre_plug(HotplugHandler *hotplug_dev, > spapr_core_pre_plug(hotplug_dev, dev, errp); > } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) { > spapr_phb_pre_plug(hotplug_dev, dev, errp); > + } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_TPM_PROXY)) { > + spapr_tpm_proxy_pre_plug(hotplug_dev, dev, errp); > } > } >
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index bded059d59c8..5e32d1d396b4 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -3957,17 +3957,28 @@ static void spapr_phb_unplug_request(HotplugHandler *hotplug_dev, } } -static void spapr_tpm_proxy_plug(HotplugHandler *hotplug_dev, DeviceState *dev, - Error **errp) +static +bool spapr_tpm_proxy_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, + Error **errp) { SpaprMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev)); - SpaprTpmProxy *tpm_proxy = SPAPR_TPM_PROXY(dev); if (spapr->tpm_proxy != NULL) { error_setg(errp, "Only one TPM proxy can be specified for this machine"); - return; + return false; } + return true; +} + +static void spapr_tpm_proxy_plug(HotplugHandler *hotplug_dev, DeviceState *dev) +{ + SpaprMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev)); + SpaprTpmProxy *tpm_proxy = SPAPR_TPM_PROXY(dev); + + /* Already checked in spapr_tpm_proxy_pre_plug() */ + g_assert(spapr->tpm_proxy == NULL); + spapr->tpm_proxy = tpm_proxy; } @@ -3990,7 +4001,7 @@ static void spapr_machine_device_plug(HotplugHandler *hotplug_dev, } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) { spapr_phb_plug(hotplug_dev, dev); } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_TPM_PROXY)) { - spapr_tpm_proxy_plug(hotplug_dev, dev, errp); + spapr_tpm_proxy_plug(hotplug_dev, dev); } } @@ -4053,6 +4064,8 @@ static void spapr_machine_device_pre_plug(HotplugHandler *hotplug_dev, spapr_core_pre_plug(hotplug_dev, dev, errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) { spapr_phb_pre_plug(hotplug_dev, dev, errp); + } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_TPM_PROXY)) { + spapr_tpm_proxy_pre_plug(hotplug_dev, dev, errp); } }
There can be only one TPM proxy at a time. This is currently checked at plug time. But this can be detected at pre-plug in order to error out earlier. This allows to get rid of error handling in the plug handler. Signed-off-by: Greg Kurz <groug@kaod.org> --- hw/ppc/spapr.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-)