From: Tyrel Datwyler <tyr...@linux.vnet.ibm.com>
We don't actually rely on this interface to surface hotplug events, and
instead rely on the similar-but-interrupt-driven check-exception RTAS
interface used for EPOW events. However, the existence of this interface
is needed to ensure guest kernels initialize the event-reporting
interfaces which will in turn be used by userspace tools to handle these
events, so we implement this interface as a stub.
Signed-off-by: Tyrel Datwyler <tyr...@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
hw/ppc/spapr.c | 1 +
hw/ppc/spapr_events.c | 9 +++++++++
include/hw/ppc/spapr.h | 2 ++
3 files changed, 12 insertions(+)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 825fd31..c65b13a 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -702,6 +702,7 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
refpoints, sizeof(refpoints))));
_FDT((fdt_property_cell(fdt, "rtas-error-log-max", RTAS_ERROR_LOG_MAX)));
+ _FDT((fdt_property_cell(fdt, "rtas-event-scan-rate",
RTAS_EVENT_SCAN_RATE)));
/*
* According to PAPR, rtas ibm,os-term, does not gaurantee a return
diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
index c0be0e5..bb80080 100644
--- a/hw/ppc/spapr_events.c
+++ b/hw/ppc/spapr_events.c
@@ -449,6 +449,14 @@ static void check_exception(PowerPCCPU *cpu,
sPAPREnvironment *spapr,
}
}
+static void event_scan(PowerPCCPU *cpu, sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ rtas_st(rets, 0, 1); /* no error events found */
+}
+
void spapr_events_init(sPAPREnvironment *spapr)
{
spapr->check_exception_irq = xics_alloc(spapr->icp, 0, 0, false);
@@ -456,4 +464,5 @@ void spapr_events_init(sPAPREnvironment *spapr)
qemu_register_powerdown_notifier(&spapr->epow_notifier);
spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
check_exception);
+ spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan);
}
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 5382bf1..aab627f 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -484,6 +484,8 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr
rtas_addr,
#define RTAS_ERROR_LOG_MAX 2048
+#define RTAS_EVENT_SCAN_RATE 1
+
typedef struct sPAPRTCETable sPAPRTCETable;
#define TYPE_SPAPR_TCE_TABLE "spapr-tce-table"
--
1.9.1
