qemu-e2k/target-arm/machine.c
Peter Maydell a65f1de982 target-arm: Implement AArch64 SPSR_EL1
Implement the AArch64 SPSR_EL1. For compatibility with how KVM
handles SPSRs and with the architectural mapping between AArch32
and AArch64, we put this in the banked_spsr[] array in the slot
that is used for SVC in AArch32. This means we need to extend the
array from uint32_t to uint64_t, which requires some reworking
of the 32 bit KVM save/restore code.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
2014-04-17 21:34:04 +01:00

287 lines
8.2 KiB
C

#include "hw/hw.h"
#include "hw/boards.h"
#include "sysemu/kvm.h"
#include "kvm_arm.h"
static bool vfp_needed(void *opaque)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
return arm_feature(env, ARM_FEATURE_VFP);
}
static int get_fpscr(QEMUFile *f, void *opaque, size_t size)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
uint32_t val = qemu_get_be32(f);
vfp_set_fpscr(env, val);
return 0;
}
static void put_fpscr(QEMUFile *f, void *opaque, size_t size)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
qemu_put_be32(f, vfp_get_fpscr(env));
}
static const VMStateInfo vmstate_fpscr = {
.name = "fpscr",
.get = get_fpscr,
.put = put_fpscr,
};
static const VMStateDescription vmstate_vfp = {
.name = "cpu/vfp",
.version_id = 3,
.minimum_version_id = 3,
.minimum_version_id_old = 3,
.fields = (VMStateField[]) {
VMSTATE_FLOAT64_ARRAY(env.vfp.regs, ARMCPU, 64),
/* The xregs array is a little awkward because element 1 (FPSCR)
* requires a specific accessor, so we have to split it up in
* the vmstate:
*/
VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU),
VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14),
{
.name = "fpscr",
.version_id = 0,
.size = sizeof(uint32_t),
.info = &vmstate_fpscr,
.flags = VMS_SINGLE,
.offset = 0,
},
VMSTATE_END_OF_LIST()
}
};
static bool iwmmxt_needed(void *opaque)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
return arm_feature(env, ARM_FEATURE_IWMMXT);
}
static const VMStateDescription vmstate_iwmmxt = {
.name = "cpu/iwmmxt",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT64_ARRAY(env.iwmmxt.regs, ARMCPU, 16),
VMSTATE_UINT32_ARRAY(env.iwmmxt.cregs, ARMCPU, 16),
VMSTATE_END_OF_LIST()
}
};
static bool m_needed(void *opaque)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
return arm_feature(env, ARM_FEATURE_M);
}
static const VMStateDescription vmstate_m = {
.name = "cpu/m",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(env.v7m.other_sp, ARMCPU),
VMSTATE_UINT32(env.v7m.vecbase, ARMCPU),
VMSTATE_UINT32(env.v7m.basepri, ARMCPU),
VMSTATE_UINT32(env.v7m.control, ARMCPU),
VMSTATE_INT32(env.v7m.current_sp, ARMCPU),
VMSTATE_INT32(env.v7m.exception, ARMCPU),
VMSTATE_END_OF_LIST()
}
};
static bool thumb2ee_needed(void *opaque)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
return arm_feature(env, ARM_FEATURE_THUMB2EE);
}
static const VMStateDescription vmstate_thumb2ee = {
.name = "cpu/thumb2ee",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(env.teecr, ARMCPU),
VMSTATE_UINT32(env.teehbr, ARMCPU),
VMSTATE_END_OF_LIST()
}
};
static int get_cpsr(QEMUFile *f, void *opaque, size_t size)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
uint32_t val = qemu_get_be32(f);
/* Avoid mode switch when restoring CPSR */
env->uncached_cpsr = val & CPSR_M;
cpsr_write(env, val, 0xffffffff);
return 0;
}
static void put_cpsr(QEMUFile *f, void *opaque, size_t size)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
qemu_put_be32(f, cpsr_read(env));
}
static const VMStateInfo vmstate_cpsr = {
.name = "cpsr",
.get = get_cpsr,
.put = put_cpsr,
};
static void cpu_pre_save(void *opaque)
{
ARMCPU *cpu = opaque;
if (kvm_enabled()) {
if (!write_kvmstate_to_list(cpu)) {
/* This should never fail */
abort();
}
} else {
if (!write_cpustate_to_list(cpu)) {
/* This should never fail. */
abort();
}
}
cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
memcpy(cpu->cpreg_vmstate_indexes, cpu->cpreg_indexes,
cpu->cpreg_array_len * sizeof(uint64_t));
memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values,
cpu->cpreg_array_len * sizeof(uint64_t));
}
static int cpu_post_load(void *opaque, int version_id)
{
ARMCPU *cpu = opaque;
int i, v;
/* Update the values list from the incoming migration data.
* Anything in the incoming data which we don't know about is
* a migration failure; anything we know about but the incoming
* data doesn't specify retains its current (reset) value.
* The indexes list remains untouched -- we only inspect the
* incoming migration index list so we can match the values array
* entries with the right slots in our own values array.
*/
for (i = 0, v = 0; i < cpu->cpreg_array_len
&& v < cpu->cpreg_vmstate_array_len; i++) {
if (cpu->cpreg_vmstate_indexes[v] > cpu->cpreg_indexes[i]) {
/* register in our list but not incoming : skip it */
continue;
}
if (cpu->cpreg_vmstate_indexes[v] < cpu->cpreg_indexes[i]) {
/* register in their list but not ours: fail migration */
return -1;
}
/* matching register, copy the value over */
cpu->cpreg_values[i] = cpu->cpreg_vmstate_values[v];
v++;
}
if (kvm_enabled()) {
if (!write_list_to_kvmstate(cpu)) {
return -1;
}
/* Note that it's OK for the TCG side not to know about
* every register in the list; KVM is authoritative if
* we're using it.
*/
write_list_to_cpustate(cpu);
} else {
if (!write_list_to_cpustate(cpu)) {
return -1;
}
}
return 0;
}
const VMStateDescription vmstate_arm_cpu = {
.name = "cpu",
.version_id = 17,
.minimum_version_id = 17,
.minimum_version_id_old = 17,
.pre_save = cpu_pre_save,
.post_load = cpu_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16),
{
.name = "cpsr",
.version_id = 0,
.size = sizeof(uint32_t),
.info = &vmstate_cpsr,
.flags = VMS_SINGLE,
.offset = 0,
},
VMSTATE_UINT32(env.spsr, ARMCPU),
VMSTATE_UINT64_ARRAY(env.banked_spsr, ARMCPU, 6),
VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 6),
VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 6),
VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5),
VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5),
VMSTATE_UINT64(env.elr_el1, ARMCPU),
VMSTATE_UINT64_ARRAY(env.sp_el, ARMCPU, 2),
/* The length-check must come before the arrays to avoid
* incoming data possibly overflowing the array.
*/
VMSTATE_INT32_LE(cpreg_vmstate_array_len, ARMCPU),
VMSTATE_VARRAY_INT32(cpreg_vmstate_indexes, ARMCPU,
cpreg_vmstate_array_len,
0, vmstate_info_uint64, uint64_t),
VMSTATE_VARRAY_INT32(cpreg_vmstate_values, ARMCPU,
cpreg_vmstate_array_len,
0, vmstate_info_uint64, uint64_t),
VMSTATE_UINT64(env.exclusive_addr, ARMCPU),
VMSTATE_UINT64(env.exclusive_val, ARMCPU),
VMSTATE_UINT64(env.exclusive_high, ARMCPU),
VMSTATE_UINT64(env.features, ARMCPU),
VMSTATE_UINT32(env.exception.syndrome, ARMCPU),
VMSTATE_UINT32(env.exception.fsr, ARMCPU),
VMSTATE_UINT64(env.exception.vaddress, ARMCPU),
VMSTATE_TIMER(gt_timer[GTIMER_PHYS], ARMCPU),
VMSTATE_TIMER(gt_timer[GTIMER_VIRT], ARMCPU),
VMSTATE_END_OF_LIST()
},
.subsections = (VMStateSubsection[]) {
{
.vmsd = &vmstate_vfp,
.needed = vfp_needed,
} , {
.vmsd = &vmstate_iwmmxt,
.needed = iwmmxt_needed,
} , {
.vmsd = &vmstate_m,
.needed = m_needed,
} , {
.vmsd = &vmstate_thumb2ee,
.needed = thumb2ee_needed,
} , {
/* empty */
}
}
};