[Qemu-devel] [RFC PATCH V5 6/8] target-arm: Enable KVM_ARM_VCPU_PSCI_0_2 feature when possible

[Pranavkumar Sawargaonkar <pranavkumar@linaro.org>]

Latest linux kernel supports in-kernel emulation of PSCI v0.2 but
to enable it we need to select KVM_ARM_VCPU_PSCI_0_2 feature using
KVM_ARM_VCPU_INIT ioctl.

Also, we can use KVM_ARM_VCPU_PSCI_0_2 feature for VCPU only when
linux kernel has KVM_CAP_ARM_PSCI_0_2 capability.

This patch updates kvm_arch_init_vcpu() to enable KVM_ARM_VCPU_PSCI_0_2
feature for VCPU when KVM ARM/ARM64 has KVM_CAP_ARM_PSCI_0_2 capability.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
 target-arm/kvm32.c |    3 +++
 target-arm/kvm64.c |    3 +++
 2 files changed, 6 insertions(+)

diff --git a/target-arm/kvm32.c b/target-arm/kvm32.c
index cc9cdfa..afc248b 100644
--- a/target-arm/kvm32.c
+++ b/target-arm/kvm32.c
@@ -179,6 +179,9 @@ int kvm_arch_init_vcpu(CPUState *cs)
     if (cpu->start_powered_off) {
         cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF;
     }
+    if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
+        cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2;
+    }
 
     /* Do KVM_ARM_VCPU_INIT ioctl */
     ret = kvm_arm_vcpu_init(cs);
diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index 528536f..917d256 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -91,6 +91,9 @@ int kvm_arch_init_vcpu(CPUState *cs)
     if (cpu->start_powered_off) {
         cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_POWER_OFF;
     }
+    if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PSCI_0_2)) {
+        cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_PSCI_0_2;
+    }
 
     /* Do KVM_ARM_VCPU_INIT ioctl */
     ret = kvm_arm_vcpu_init(cs);
-- 
1.7.9.5