This allows the ibm,get-system-parameter RTAS call to succeed for the
DIAGNOSTICS_RUN_MODE system parameter.
The problem can be seen with "ppc64_cpu --run-mode" from the
powerpc-utils package which fails before this patch with "Machine does
not support diagnostic run mode".
This is corrected by using the rtas_st_buffer() function to write to
the buffer.
The function return value code is also slightly simplified.
Signed-off-by: Sam Bobroff <address@hidden>
---
hw/ppc/spapr_rtas.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index 4f87673..8d94845 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -236,19 +236,18 @@ static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
target_ulong parameter = rtas_ld(args, 0);
target_ulong buffer = rtas_ld(args, 1);
target_ulong length = rtas_ld(args, 2);
- target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
+ target_ulong ret = RTAS_OUT_SUCCESS;
+ uint8_t zero = 0;
switch (parameter) {
case DIAGNOSTICS_RUN_MODE:
- if (length == 1) {
- rtas_st(buffer, 0, 0);
- ret = RTAS_OUT_SUCCESS;
- }
+ rtas_st_buffer(buffer, length, &zero, sizeof zero);