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[Qemu-ppc] [QEMU-PPC] [PATCH v2 4/4] target/ppc/spapr: Enable the large
From: |
Suraj Jitindar Singh |
Subject: |
[Qemu-ppc] [QEMU-PPC] [PATCH v2 4/4] target/ppc/spapr: Enable the large decrementer for pseries-4.0 |
Date: |
Wed, 27 Feb 2019 15:30:08 +1100 |
Enable the large decrementer by default for the pseries-4.0 machine type.
It is disabled again by default_caps_with_cpu() for pre-POWER9 cpus
since they don't support the large decrementer.
Signed-off-by: Suraj Jitindar Singh <address@hidden>
---
hw/ppc/spapr.c | 3 ++-
hw/ppc/spapr_caps.c | 5 +++++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index ff5ba59cc0..bbfaca3b05 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4297,7 +4297,7 @@ static void spapr_machine_class_init(ObjectClass *oc,
void *data)
smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN;
smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = 16; /* 64kiB */
smc->default_caps.caps[SPAPR_CAP_NESTED_KVM_HV] = SPAPR_CAP_OFF;
- smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = 0;
+ smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = 1;
spapr_caps_add_properties(smc, &error_abort);
smc->irq = &spapr_irq_xics;
smc->dr_phb_enabled = true;
@@ -4373,6 +4373,7 @@ static void spapr_machine_3_1_class_options(MachineClass
*mc)
mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power8_v2.0");
smc->update_dt_enabled = false;
smc->dr_phb_enabled = false;
+ smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = 0;
}
DEFINE_SPAPR_MACHINE(3_1, "3.1", false);
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index 1e76685199..fbd5d35cd0 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -536,6 +536,11 @@ static sPAPRCapabilities
default_caps_with_cpu(sPAPRMachineState *spapr,
caps = smc->default_caps;
+ 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