ARM/ARM64: KVM: Emulate PSCI v0.2 MIGRATE_INFO_TYPE and related functions (bab0b430) · Commits · 戴 / test

This patch adds emulation of PSCI v0.2 MIGRATE, MIGRATE_INFO_TYPE, and MIGRATE_INFO_UP_CPU function calls for KVM ARM/ARM64. KVM ARM/ARM64 being a hypervisor (and not a Trusted OS), we cannot provide this functions hence we emulate these functions in following way: 1. MIGRATE - Returns "Not Supported" 2. MIGRATE_INFO_TYPE - Return 2 i.e. Trusted OS is not present 3. MIGRATE_INFO_UP_CPU - Returns "Not Supported" Signed-off-by:

Anup Patel <anup.patel@linaro.org> Signed-off-by:

Pranavkumar Sawargaonkar <pranavkumar@linaro.org> Reviewed-by:

Christoffer Dall <christoffer.dall@linaro.org> Acked-by:

Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:

Christoffer Dall <christoffer.dall@linaro.org>

arch/arm/kvm/psci.c

+16 −5

Original line number	Diff line number	Diff line
		@@ -182,6 +182,22 @@ static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu)
		case PSCI_0_2_FN64_AFFINITY_INFO:
		val = kvm_psci_vcpu_affinity_info(vcpu);
		break;
		case PSCI_0_2_FN_MIGRATE:
		case PSCI_0_2_FN64_MIGRATE:
		val = PSCI_RET_NOT_SUPPORTED;
		break;
		case PSCI_0_2_FN_MIGRATE_INFO_TYPE:
		/*
		* Trusted OS is MP hence does not require migration
		* or
		* Trusted OS is not present
		*/
		val = PSCI_0_2_TOS_MP;
		break;
		case PSCI_0_2_FN_MIGRATE_INFO_UP_CPU:
		case PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU:
		val = PSCI_RET_NOT_SUPPORTED;
		break;
		case PSCI_0_2_FN_SYSTEM_OFF:
		kvm_psci_system_off(vcpu);
		/*
		@@ -207,12 +223,7 @@ static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu)
		ret = 0;
		break;
		case PSCI_0_2_FN_CPU_SUSPEND:
		case PSCI_0_2_FN_MIGRATE:
		case PSCI_0_2_FN_MIGRATE_INFO_TYPE:
		case PSCI_0_2_FN_MIGRATE_INFO_UP_CPU:
		case PSCI_0_2_FN64_CPU_SUSPEND:
		case PSCI_0_2_FN64_MIGRATE:
		case PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU:
		val = PSCI_RET_NOT_SUPPORTED;
		break;
		default:

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