/*
* Detect the presence of a resident Trusted OS which may cause CPU_OFF to
* return DENIED (which would be fatal).
*/
static void __init psci_init_migrate(void)
{
unsigned long cpuid;
int type, cpu = -1;
type = psci_ops.migrate_info_type();
if (type == PSCI_0_2_TOS_MP) {
pr_info("Trusted OS migration not required\n");
return;
}
if (type == PSCI_RET_NOT_SUPPORTED) {
pr_info("MIGRATE_INFO_TYPE not supported.\n");
return;
}
if (type != PSCI_0_2_TOS_UP_MIGRATE &&
type != PSCI_0_2_TOS_UP_NO_MIGRATE) {
pr_err("MIGRATE_INFO_TYPE returned unknown type (%d)\n", type);
return;
}
cpuid = psci_migrate_info_up_cpu();
if (cpuid & ~MPIDR_HWID_BITMASK) {
pr_warn("MIGRATE_INFO_UP_CPU reported invalid physical ID (0x%lx)\n",
cpuid);
return;
}
cpu = get_logical_index(cpuid);
resident_cpu = cpu >= 0 ? cpu : -1;
pr_info("Trusted OS resident on physical CPU 0x%lx\n", cpuid);
}
/*******************************************************************************
* PSCI top level handler for servicing SMCs.
******************************************************************************/
uint64_t psci_smc_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
uint64_t rc;
switch (smc_fid) {
case PSCI_VERSION:
rc = psci_version();
break;
case PSCI_CPU_OFF:
rc = __psci_cpu_off();
break;
case PSCI_CPU_SUSPEND_AARCH64:
case PSCI_CPU_SUSPEND_AARCH32:
rc = __psci_cpu_suspend(x1, x2, x3);
break;
case PSCI_CPU_ON_AARCH64:
case PSCI_CPU_ON_AARCH32:
rc = psci_cpu_on(x1, x2, x3);
break;
case PSCI_AFFINITY_INFO_AARCH32:
case PSCI_AFFINITY_INFO_AARCH64:
rc = psci_affinity_info(x1, x2);
break;
case PSCI_MIG_AARCH32:
case PSCI_MIG_AARCH64:
rc = psci_migrate(x1);
break;
case PSCI_MIG_INFO_TYPE:
rc = psci_migrate_info_type();
break;
case PSCI_MIG_INFO_UP_CPU_AARCH32:
case PSCI_MIG_INFO_UP_CPU_AARCH64:
rc = psci_migrate_info_up_cpu();
break;
default:
rc = SMC_UNK;
WARN("Unimplemented PSCI Call: 0x%x \n", smc_fid);
}
SMC_RET1(handle, rc);
}