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[Qemu-devel] [PATCH v2] target/ppc/kvm: set vcpu as online/offline
From: |
Nikunj A Dadhania |
Subject: |
[Qemu-devel] [PATCH v2] target/ppc/kvm: set vcpu as online/offline |
Date: |
Tue, 4 Sep 2018 11:00:39 +0530 |
Set the newly added register(KVM_REG_PPC_ONLINE) to indicate if the vcpu is
online(1) or offline(0)
KVM will use this information to set the RWMR register, which controls the PURR
and SPURR accumulation.
CC: address@hidden
Signed-off-by: Nikunj A Dadhania <address@hidden>
---
hw/ppc/spapr_cpu_core.c | 1 +
hw/ppc/spapr_rtas.c | 3 +++
target/ppc/kvm.c | 9 +++++++++
target/ppc/kvm_ppc.h | 6 ++++++
4 files changed, 19 insertions(+)
diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 876f0b3d9d..9863221756 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -90,6 +90,7 @@ void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong
nip, target_ulong r
env->nip = nip;
env->gpr[3] = r3;
+ kvmppc_set_reg_ppc_online(cpu, 1);
CPU(cpu)->halted = 0;
/* Enable Power-saving mode Exit Cause exceptions */
ppc_store_lpcr(cpu, env->spr[SPR_LPCR] | pcc->lpcr_pm);
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index 4ac96bc94b..ce8072689b 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -33,6 +33,7 @@
#include "sysemu/device_tree.h"
#include "sysemu/cpus.h"
#include "sysemu/hw_accel.h"
+#include "kvm_ppc.h"
#include "hw/ppc/spapr.h"
#include "hw/ppc/spapr_vio.h"
@@ -187,6 +188,7 @@ static void rtas_start_cpu(PowerPCCPU *callcpu,
sPAPRMachineState *spapr,
newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset;
spapr_cpu_set_entry_state(newcpu, start, r3);
+ kvmppc_set_reg_ppc_online(newcpu, 1);
qemu_cpu_kick(CPU(newcpu));
@@ -207,6 +209,7 @@ static void rtas_stop_self(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
* guest */
ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
cs->halted = 1;
+ kvmppc_set_reg_ppc_online(cpu, 0);
qemu_cpu_kick(cs);
}
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 9211ee2ee1..7be8081968 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2785,3 +2785,12 @@ bool kvmppc_pvr_workaround_required(PowerPCCPU *cpu)
return !kvmppc_is_pr(cs->kvm_state);
}
+
+void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu, unsigned int online)
+{
+ CPUState *cs = CPU(cpu);
+
+ if (kvm_enabled()) {
+ kvm_set_one_reg(cs, KVM_REG_PPC_ONLINE, &online);
+ }
+}
diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h
index 657582bb32..d635032bd9 100644
--- a/target/ppc/kvm_ppc.h
+++ b/target/ppc/kvm_ppc.h
@@ -72,6 +72,7 @@ bool kvmppc_pvr_workaround_required(PowerPCCPU *cpu);
bool kvmppc_hpt_needs_host_contiguous_pages(void);
void kvm_check_mmu(PowerPCCPU *cpu, Error **errp);
+void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu, unsigned int online);
#else
@@ -187,6 +188,11 @@ static inline target_ulong
kvmppc_configure_v3_mmu(PowerPCCPU *cpu,
return 0;
}
+static inline void kvmppc_set_reg_ppc_online(PowerPCCPU *cpu, unsigned int
online)
+{
+ return;
+}
+
#ifndef CONFIG_USER_ONLY
static inline bool kvmppc_spapr_use_multitce(void)
{
--
2.14.4
- [Qemu-devel] [PATCH v2] target/ppc/kvm: set vcpu as online/offline,
Nikunj A Dadhania <=