2  * Copyright (C) 2014 - Linaro
21 #include "exec/helper-proto.h"
22 #include "kvm-consts.h"
23 #include "qemu/main-loop.h"
26 #include "arm-powerctl.h"
32      * Return true if the exception type matches the configured PSCI conduit.  in arm_is_psci_call()
34      * whether we should treat it as a PSCI call or with the architecturally  in arm_is_psci_call()
41         if (cpu->psci_conduit != QEMU_PSCI_CONDUIT_HVC) {  in arm_is_psci_call()
46         if (cpu->psci_conduit != QEMU_PSCI_CONDUIT_SMC) {  in arm_is_psci_call()
61      * Coordination Interface (PSCI) calls (as described in ARM DEN 0022D.b),  in arm_handle_psci_call()
67     CPUARMState *env = &cpu->env;  in arm_handle_psci_call()
71     int32_t ret = 0;  in arm_handle_psci_call()
74     for (i = 0; i < 4; i++) {  in arm_handle_psci_call()
76          * All PSCI functions take explicit 32-bit or native int sized  in arm_handle_psci_call()
77          * arguments so we can simply zero-extend all arguments regardless  in arm_handle_psci_call()
80         param[i] = is_a64(env) ? env->xregs[i] : env->regs[i];  in arm_handle_psci_call()
83     if ((param[0] & QEMU_PSCI_0_2_64BIT) && !is_a64(env)) {  in arm_handle_psci_call()
88     switch (param[0]) {  in arm_handle_psci_call()
103         case 0:  in arm_handle_psci_call()
112             ret = target_cpu->power_state;  in arm_handle_psci_call()
115             /* Everything above affinity level 0 is always on. */  in arm_handle_psci_call()
116             ret = 0;  in arm_handle_psci_call()
121         /* QEMU reset and shutdown are async requests, but PSCI  in arm_handle_psci_call()
134         /* The PSCI spec mandates that newly brought up CPUs start  in arm_handle_psci_call()
136          * on the calling CPU. Since the QEMU PSCI implementation is  in arm_handle_psci_call()
162         if (param[1] & 0xfffe0000) {  in arm_handle_psci_call()
168             env->xregs[0] = 0;  in arm_handle_psci_call()
170             env->regs[0] = 0;  in arm_handle_psci_call()
192                 ret = 0;  in arm_handle_psci_call()
212         env->xregs[0] = ret;  in arm_handle_psci_call()
214         env->regs[0] = ret;  in arm_handle_psci_call()