On Wed, Apr 2, 2014 at 5:42 AM, Anup Patel anup.patel@linaro.org wrote:
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:
- MIGRATE - Returns "Not Supported"
- MIGRATE_INFO_TYPE - Return 2 i.e. Trusted OS is either not present or does not require migration
- 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
One minor thing below, otherwise:
Acked-by: Rob Herring robh@kernel.org
arch/arm/kvm/psci.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c index 5fccf0b..d8335da 100644 --- a/arch/arm/kvm/psci.c +++ b/arch/arm/kvm/psci.c @@ -197,6 +197,21 @@ 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 either not present or* does not require migration*/val = 2;
This value should be defined int psci.h along with other possible values.
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); val = PSCI_RET_SUCCESS;@@ -208,12 +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:-- 1.7.9.5
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