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| author | Michael Roth <mdroth@linux.vnet.ibm.com> | 2016-10-26 21:20:26 -0500 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-10-28 11:17:35 +1100 |
| commit | ffbb1705a33df8e2fb12b24d96663d63b22eaf8b (patch) | |
| tree | d4c0f902ad893816f08ac30c2a58297b16057794 /include/hw | |
| parent | 9f992cca93de808bccbd02e14ce9200e8f25b8eb (diff) | |
| download | qemu-ffbb1705a33df8e2fb12b24d96663d63b22eaf8b.tar.gz qemu-ffbb1705a33df8e2fb12b24d96663d63b22eaf8b.tar.bz2 qemu-ffbb1705a33df8e2fb12b24d96663d63b22eaf8b.zip | |
spapr_events: add support for dedicated hotplug event source
Hotplug events were previously delivered using an EPOW interrupt
and were queued by linux guests into a circular buffer. For traditional
EPOW events like shutdown/resets, this isn't an issue, but for hotplug
events there are cases where this buffer can be exhausted, resulting
in the loss of hotplug events, resets, etc.
Newer-style hotplug event are delivered using a dedicated event source.
We enable this in supported guests by adding standard an additional
event source in the guest device-tree via /event-sources, and, if
the guest advertises support for the newer-style hotplug events,
using the corresponding interrupt to signal the available of
hotplug/unplug events.
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/ppc/spapr.h | 6 | ||||
| -rw-r--r-- | include/hw/ppc/spapr_ovec.h | 1 |
2 files changed, 5 insertions, 2 deletions
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index b6f9f1b632..21af971239 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -13,6 +13,7 @@ struct sPAPRPHBState; struct sPAPRNVRAM; typedef struct sPAPRConfigureConnectorState sPAPRConfigureConnectorState; typedef struct sPAPREventLogEntry sPAPREventLogEntry; +typedef struct sPAPREventSource sPAPREventSource; #define HPTE64_V_HPTE_DIRTY 0x0000000000000040ULL #define SPAPR_ENTRY_POINT 0x100 @@ -77,9 +78,10 @@ struct sPAPRMachineState { sPAPROptionVector *ov5_cas; /* negotiated (via CAS) option vectors */ bool cas_reboot; - uint32_t check_exception_irq; Notifier epow_notifier; QTAILQ_HEAD(, sPAPREventLogEntry) pending_events; + bool use_hotplug_event_source; + sPAPREventSource *event_sources; /* Migration state */ int htab_save_index; @@ -584,7 +586,7 @@ struct sPAPREventLogEntry { }; void spapr_events_init(sPAPRMachineState *sm); -void spapr_dt_events(void *fdt, uint32_t check_exception_irq); +void spapr_dt_events(sPAPRMachineState *sm, void *fdt); int spapr_h_cas_compose_response(sPAPRMachineState *sm, target_ulong addr, target_ulong size, bool cpu_update, diff --git a/include/hw/ppc/spapr_ovec.h b/include/hw/ppc/spapr_ovec.h index 81cdd14f64..6a06da32e6 100644 --- a/include/hw/ppc/spapr_ovec.h +++ b/include/hw/ppc/spapr_ovec.h @@ -45,6 +45,7 @@ typedef struct sPAPROptionVector sPAPROptionVector; /* option vector 5 */ #define OV5_DRCONF_MEMORY OV_BIT(2, 2) #define OV5_FORM1_AFFINITY OV_BIT(5, 0) +#define OV5_HP_EVT OV_BIT(6, 5) /* interfaces */ sPAPROptionVector *spapr_ovec_new(void); |