This adds very basic handlers for ibm,get-system-parameter and
ibm,set-system-parameter RTAS calls.
The only parameter handled at the moment is
"platform-processor-diagnostics-run-mode" which is always disabled and
does not support changing. This is expected to make
"ppc64_cpu --run-mode=1" happy.
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
---
Changes:
v2:
* addressed comments from Alex Graf
---
hw/ppc/spapr_rtas.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index eb542f2..8053a67 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -224,6 +224,50 @@ static void rtas_stop_self(PowerPCCPU *cpu,
sPAPREnvironment *spapr,
env->msr = 0;
}
+#define DIAGNOSTICS_RUN_MODE 42
+
+static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
+ sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ target_ulong papameter = rtas_ld(args, 0);
+ target_ulong buffer = rtas_ld(args, 1);
+ target_ulong length = rtas_ld(args, 2);
+ target_ulong ret = -3; /* System parameter is not supported */
+
+ switch (papameter) {
+ case DIAGNOSTICS_RUN_MODE:
+ if (length == 1) {
+ rtas_st(buffer, 0, 0);
+ ret = 0; /* Success */
+ }
+ break;
+ }
+
+ rtas_st(rets, 0, ret);
+}
+
+static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
+ sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ target_ulong papameter = rtas_ld(args, 0);
+ /* target_ulong buffer = rtas_ld(args, 1); */
+ target_ulong ret = -3; /* System parameter is not supported */
+
+ switch (papameter) {
+ case DIAGNOSTICS_RUN_MODE:
+ ret = -9002; /* Setting not allowed/authorized */
+ break;
+ }
+
+ rtas_st(rets, 0, ret);
+}
+
static struct rtas_call {
const char *name;
spapr_rtas_fn fn;
@@ -345,6 +389,10 @@ static void core_rtas_register_types(void)
rtas_query_cpu_stopped_state);
spapr_rtas_register("start-cpu", rtas_start_cpu);
spapr_rtas_register("stop-self", rtas_stop_self);
+ spapr_rtas_register("ibm,get-system-parameter",
+ rtas_ibm_get_system_parameter);
+ spapr_rtas_register("ibm,set-system-parameter",
+ rtas_ibm_set_system_parameter);
}
type_init(core_rtas_register_types)
--
1.8.4.rc4
