[RFC kvmtool 20/31] arm64: Finalize realm VCPU after reset

Suzuki K Poulose
2023-01-27T12:20:30Z

From: Alexandru Elisei <alexandru.elisei@arm.com>

In order to run a VCPU belonging to a realm, that VCPU must be in the
finalized state. Finalize the CPU after reset, since kvmtool won't be
touching the VCPU state afterwards.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
arm/aarch64/kvm-cpu.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arm/aarch64/kvm-cpu.c b/arm/aarch64/kvm-cpu.c
index 37f9aa9d..24e570c4 100644
--- a/arm/aarch64/kvm-cpu.c
+++ b/arm/aarch64/kvm-cpu.c
@@ -128,6 +128,13 @@ static void reset_vcpu_aarch64(struct kvm_cpu *vcpu)
if (ioctl(vcpu->vcpu_fd, KVM_SET_ONE_REG, &reg) < 0)
die_perror("KVM_SET_ONE_REG failed (pc)");
}
+
+ if (kvm->cfg.arch.is_realm) {
+ int feature = KVM_ARM_VCPU_REC;
+
+ if (ioctl(vcpu->vcpu_fd, KVM_ARM_VCPU_FINALIZE, &feature) < 0)
+ die_perror("KVM_ARM_VCPU_FINALIZE(KVM_ARM_VCPU_REC)");
+ }
}

void kvm_cpu__select_features(struct kvm *kvm, struct kvm_vcpu_init *init)
--
2.34.1