exec-all.h contains TCG-specific definitions. It is not needed outside TCG-specific files such as translate.c, exec.c or *helper.c. One generic function had snuck into include/exec/exec-all.h; move it to include/qom/cpu.h. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
203 lines
6.4 KiB
C
203 lines
6.4 KiB
C
/*
|
|
* Copyright (C) 2014 - Linaro
|
|
* Author: Rob Herring <rob.herring@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "qemu/osdep.h"
|
|
#include <cpu.h>
|
|
#include <exec/helper-proto.h>
|
|
#include <kvm-consts.h>
|
|
#include <sysemu/sysemu.h>
|
|
#include "internals.h"
|
|
#include "arm-powerctl.h"
|
|
#include "exec/exec-all.h"
|
|
|
|
bool arm_is_psci_call(ARMCPU *cpu, int excp_type)
|
|
{
|
|
/* Return true if the r0/x0 value indicates a PSCI call and
|
|
* the exception type matches the configured PSCI conduit. This is
|
|
* called before the SMC/HVC instruction is executed, to decide whether
|
|
* we should treat it as a PSCI call or with the architecturally
|
|
* defined behaviour for an SMC or HVC (which might be UNDEF or trap
|
|
* to EL2 or to EL3).
|
|
*/
|
|
CPUARMState *env = &cpu->env;
|
|
uint64_t param = is_a64(env) ? env->xregs[0] : env->regs[0];
|
|
|
|
switch (excp_type) {
|
|
case EXCP_HVC:
|
|
if (cpu->psci_conduit != QEMU_PSCI_CONDUIT_HVC) {
|
|
return false;
|
|
}
|
|
break;
|
|
case EXCP_SMC:
|
|
if (cpu->psci_conduit != QEMU_PSCI_CONDUIT_SMC) {
|
|
return false;
|
|
}
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
switch (param) {
|
|
case QEMU_PSCI_0_2_FN_PSCI_VERSION:
|
|
case QEMU_PSCI_0_2_FN_MIGRATE_INFO_TYPE:
|
|
case QEMU_PSCI_0_2_FN_AFFINITY_INFO:
|
|
case QEMU_PSCI_0_2_FN64_AFFINITY_INFO:
|
|
case QEMU_PSCI_0_2_FN_SYSTEM_RESET:
|
|
case QEMU_PSCI_0_2_FN_SYSTEM_OFF:
|
|
case QEMU_PSCI_0_1_FN_CPU_ON:
|
|
case QEMU_PSCI_0_2_FN_CPU_ON:
|
|
case QEMU_PSCI_0_2_FN64_CPU_ON:
|
|
case QEMU_PSCI_0_1_FN_CPU_OFF:
|
|
case QEMU_PSCI_0_2_FN_CPU_OFF:
|
|
case QEMU_PSCI_0_1_FN_CPU_SUSPEND:
|
|
case QEMU_PSCI_0_2_FN_CPU_SUSPEND:
|
|
case QEMU_PSCI_0_2_FN64_CPU_SUSPEND:
|
|
case QEMU_PSCI_0_1_FN_MIGRATE:
|
|
case QEMU_PSCI_0_2_FN_MIGRATE:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void arm_handle_psci_call(ARMCPU *cpu)
|
|
{
|
|
/*
|
|
* This function partially implements the logic for dispatching Power State
|
|
* Coordination Interface (PSCI) calls (as described in ARM DEN 0022B.b),
|
|
* to the extent required for bringing up and taking down secondary cores,
|
|
* and for handling reset and poweroff requests.
|
|
* Additional information about the calling convention used is available in
|
|
* the document 'SMC Calling Convention' (ARM DEN 0028)
|
|
*/
|
|
CPUARMState *env = &cpu->env;
|
|
uint64_t param[4];
|
|
uint64_t context_id, mpidr;
|
|
target_ulong entry;
|
|
int32_t ret = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
/*
|
|
* All PSCI functions take explicit 32-bit or native int sized
|
|
* arguments so we can simply zero-extend all arguments regardless
|
|
* of which exact function we are about to call.
|
|
*/
|
|
param[i] = is_a64(env) ? env->xregs[i] : env->regs[i];
|
|
}
|
|
|
|
if ((param[0] & QEMU_PSCI_0_2_64BIT) && !is_a64(env)) {
|
|
ret = QEMU_PSCI_RET_INVALID_PARAMS;
|
|
goto err;
|
|
}
|
|
|
|
switch (param[0]) {
|
|
CPUState *target_cpu_state;
|
|
ARMCPU *target_cpu;
|
|
|
|
case QEMU_PSCI_0_2_FN_PSCI_VERSION:
|
|
ret = QEMU_PSCI_0_2_RET_VERSION_0_2;
|
|
break;
|
|
case QEMU_PSCI_0_2_FN_MIGRATE_INFO_TYPE:
|
|
ret = QEMU_PSCI_0_2_RET_TOS_MIGRATION_NOT_REQUIRED; /* No trusted OS */
|
|
break;
|
|
case QEMU_PSCI_0_2_FN_AFFINITY_INFO:
|
|
case QEMU_PSCI_0_2_FN64_AFFINITY_INFO:
|
|
mpidr = param[1];
|
|
|
|
switch (param[2]) {
|
|
case 0:
|
|
target_cpu_state = arm_get_cpu_by_id(mpidr);
|
|
if (!target_cpu_state) {
|
|
ret = QEMU_PSCI_RET_INVALID_PARAMS;
|
|
break;
|
|
}
|
|
target_cpu = ARM_CPU(target_cpu_state);
|
|
ret = target_cpu->powered_off ? 1 : 0;
|
|
break;
|
|
default:
|
|
/* Everything above affinity level 0 is always on. */
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case QEMU_PSCI_0_2_FN_SYSTEM_RESET:
|
|
qemu_system_reset_request();
|
|
/* QEMU reset and shutdown are async requests, but PSCI
|
|
* mandates that we never return from the reset/shutdown
|
|
* call, so power the CPU off now so it doesn't execute
|
|
* anything further.
|
|
*/
|
|
goto cpu_off;
|
|
case QEMU_PSCI_0_2_FN_SYSTEM_OFF:
|
|
qemu_system_shutdown_request();
|
|
goto cpu_off;
|
|
case QEMU_PSCI_0_1_FN_CPU_ON:
|
|
case QEMU_PSCI_0_2_FN_CPU_ON:
|
|
case QEMU_PSCI_0_2_FN64_CPU_ON:
|
|
mpidr = param[1];
|
|
entry = param[2];
|
|
context_id = param[3];
|
|
/*
|
|
* The PSCI spec mandates that newly brought up CPUs enter the
|
|
* exception level of the caller in the same execution mode as
|
|
* the caller, with context_id in x0/r0, respectively.
|
|
*/
|
|
ret = arm_set_cpu_on(mpidr, entry, context_id, arm_current_el(env),
|
|
is_a64(env));
|
|
break;
|
|
case QEMU_PSCI_0_1_FN_CPU_OFF:
|
|
case QEMU_PSCI_0_2_FN_CPU_OFF:
|
|
goto cpu_off;
|
|
case QEMU_PSCI_0_1_FN_CPU_SUSPEND:
|
|
case QEMU_PSCI_0_2_FN_CPU_SUSPEND:
|
|
case QEMU_PSCI_0_2_FN64_CPU_SUSPEND:
|
|
/* Affinity levels are not supported in QEMU */
|
|
if (param[1] & 0xfffe0000) {
|
|
ret = QEMU_PSCI_RET_INVALID_PARAMS;
|
|
break;
|
|
}
|
|
/* Powerdown is not supported, we always go into WFI */
|
|
if (is_a64(env)) {
|
|
env->xregs[0] = 0;
|
|
} else {
|
|
env->regs[0] = 0;
|
|
}
|
|
helper_wfi(env);
|
|
break;
|
|
case QEMU_PSCI_0_1_FN_MIGRATE:
|
|
case QEMU_PSCI_0_2_FN_MIGRATE:
|
|
ret = QEMU_PSCI_RET_NOT_SUPPORTED;
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
err:
|
|
if (is_a64(env)) {
|
|
env->xregs[0] = ret;
|
|
} else {
|
|
env->regs[0] = ret;
|
|
}
|
|
return;
|
|
|
|
cpu_off:
|
|
ret = arm_set_cpu_off(cpu->mp_affinity);
|
|
/* notreached */
|
|
/* sanity check in case something failed */
|
|
assert(ret == QEMU_ARM_POWERCTL_RET_SUCCESS);
|
|
}
|