linux-kernel - [PATCH kvmtool v4 14/15] arm64: psci: Implement SYSTEM

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Message-ID: <20250930103130.197534-16-suzuki.poulose@arm.com>
Date: Tue, 30 Sep 2025 11:31:29 +0100
From: Suzuki K Poulose <suzuki.poulose@....com>
To: kvmarm@...ts.linux.dev
Cc: kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	will@...nel.org,
	oliver.upton@...ux.dev,
	maz@...nel.org,
	alexandru.elisei@....com,
	aneesh.kumar@...nel.org,
	steven.price@....com,
	tabba@...gle.com,
	Suzuki K Poulose <suzuki.poulose@....com>
Subject: [PATCH kvmtool v4 14/15] arm64: psci: Implement SYSTEM_{OFF,RESET}

From: Oliver Upton <oliver.upton@...ux.dev>

Add support for the PSCI SYSTEM_{OFF,RESET} calls. Match the behavior of
the SYSTEM_EVENT based implementation and just terminate the VM.

Signed-off-by: Oliver Upton <oliver.upton@...ux.dev>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 arm64/psci.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arm64/psci.c b/arm64/psci.c
index 3deb672e..874ad141 100644
--- a/arm64/psci.c
+++ b/arm64/psci.c
@@ -33,6 +33,8 @@ static void psci_features(struct kvm_cpu *vcpu, struct arm_smccc_res *res)
 	case PSCI_0_2_FN_AFFINITY_INFO:
 	case PSCI_0_2_FN64_AFFINITY_INFO:
 	case PSCI_0_2_FN_MIGRATE_INFO_TYPE:
+	case PSCI_0_2_FN_SYSTEM_OFF:
+	case PSCI_0_2_FN_SYSTEM_RESET:
 	case ARM_SMCCC_VERSION_FUNC_ID:
 		res->a0 = PSCI_RET_SUCCESS;
 		break;
@@ -195,6 +197,10 @@ void handle_psci(struct kvm_cpu *vcpu, struct arm_smccc_res *res)
 		/* Trusted OS not present */
 		res->a0 = PSCI_0_2_TOS_MP;
 		break;
+	case PSCI_0_2_FN_SYSTEM_OFF:
+	case PSCI_0_2_FN_SYSTEM_RESET:
+		kvm__reboot(vcpu->kvm);
+		break;
 	default:
 		res->a0 = PSCI_RET_NOT_SUPPORTED;
 	}
-- 
2.43.0