diff mbox series

[RFC,kvmtool,4/5] ARM: Add a helper to re-init a vCPU

Message ID 20220311175717.616958-5-oupton@google.com (mailing list archive)
State New, archived
Headers show
Series ARM: Implement PSCI SYSTEM_SUSPEND | expand

Commit Message

Oliver Upton March 11, 2022, 5:57 p.m. UTC 
Create a helper that can be called to reinitialize a particular vCPU, or
in other words issue the KVM_ARM_VCPU_INIT and KVM_ARM_VCPU_FINALIZE
ioctls accordingly.

Make use of the helper from kvm_cpu__arch_init() after the correct
target/feature set have been identified. Calling KVM_ARM_VCPU_INIT with
the same target more than once is benign.

Signed-off-by: Oliver Upton <oupton@google.com>
---
 arm/kvm-cpu.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arm/kvm-cpu.c b/arm/kvm-cpu.c
index 1ea56bb..164e399 100644
--- a/arm/kvm-cpu.c
+++ b/arm/kvm-cpu.c
@@ -35,6 +35,15 @@  int kvm_cpu__register_kvm_arm_target(struct kvm_arm_target *target)
 	return -ENOSPC;
 }
 
+static void kvm_cpu__arch_reinit(struct kvm_cpu *vcpu)
+{
+	if (ioctl(vcpu->vcpu_fd, KVM_ARM_VCPU_INIT, &vcpu->init) < 0)
+		die("KVM_ARM_VCPU_INIT failed");
+
+	if (kvm_cpu__configure_features(vcpu))
+		die("Unable to configure requested vcpu features");
+}
+
 struct kvm_cpu *kvm_cpu__arch_init(struct kvm *kvm, unsigned long cpu_id)
 {
 	struct kvm_arm_target *target;
@@ -132,8 +141,7 @@  struct kvm_cpu *kvm_cpu__arch_init(struct kvm *kvm, unsigned long cpu_id)
 	vcpu->cpu_compatible	= target->compatible;
 	vcpu->is_running	= true;
 
-	if (kvm_cpu__configure_features(vcpu))
-		die("Unable to configure requested vcpu features");
+	kvm_cpu__arch_reinit(vcpu);
 
 	return vcpu;
 }