[Qemu-devel] [QEMU-PPC] [PATCH 4/4] target/ppc/spapr: Enable the large decrementer by default on POWER9

[Suraj Jitindar Singh <sjitindarsingh@gmail.com>]

Enable the large decrementer by default on POWER9 cpu models. The
default value applied is that provided in the cpu class.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
---
 hw/ppc/spapr_caps.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index e07568fb94..f48aa367e3 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -566,11 +566,18 @@ sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = {
 static sPAPRCapabilities default_caps_with_cpu(sPAPRMachineState *spapr,
                                                const char *cputype)
 {
+    PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(object_class_by_name(cputype));
     sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
     sPAPRCapabilities caps;
 
     caps = smc->default_caps;
 
+    caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = pcc->hdecr_bits;
+    if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_3_00,
+                               0, spapr->max_compat_pvr)) {
+        caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = 0;
+    }
+
     if (!ppc_type_check_compat(cputype, CPU_POWERPC_LOGICAL_2_07,
                                0, spapr->max_compat_pvr)) {
         caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF;
-- 
2.13.6