As feature flags are added or removed, the meanings of bits in the `features` field can change between QEMU versions, causing migration failures. Additionally, migrating the field is not useful because it is a constant function of the CPU being used. Fixes: LP:1914696 Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com> Suggested-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Andrew Jones <drjones@redhat.com> Tested-by: Andrew Jones <drjones@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
850 lines
27 KiB
C
850 lines
27 KiB
C
#include "qemu/osdep.h"
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#include "cpu.h"
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#include "qemu/error-report.h"
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#include "sysemu/kvm.h"
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#include "kvm_arm.h"
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#include "internals.h"
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#include "migration/cpu.h"
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static bool vfp_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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return (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)
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? cpu_isar_feature(aa64_fp_simd, cpu)
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: cpu_isar_feature(aa32_vfp_simd, cpu));
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}
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static int get_fpscr(QEMUFile *f, void *opaque, size_t size,
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const VMStateField *field)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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uint32_t val = qemu_get_be32(f);
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vfp_set_fpscr(env, val);
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return 0;
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}
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static int put_fpscr(QEMUFile *f, void *opaque, size_t size,
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const VMStateField *field, JSONWriter *vmdesc)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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qemu_put_be32(f, vfp_get_fpscr(env));
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return 0;
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}
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static const VMStateInfo vmstate_fpscr = {
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.name = "fpscr",
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.get = get_fpscr,
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.put = put_fpscr,
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};
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static const VMStateDescription vmstate_vfp = {
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.name = "cpu/vfp",
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.version_id = 3,
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.minimum_version_id = 3,
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.needed = vfp_needed,
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.fields = (VMStateField[]) {
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/* For compatibility, store Qn out of Zn here. */
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[0].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[1].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[2].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[3].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[4].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[5].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[6].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[7].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[8].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[9].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[10].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[11].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[12].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[13].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[14].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[15].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[16].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[17].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[18].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[19].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[20].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[21].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[22].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[23].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[24].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[25].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[26].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[27].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[28].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[29].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[30].d, ARMCPU, 0, 2),
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VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[31].d, ARMCPU, 0, 2),
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/* The xregs array is a little awkward because element 1 (FPSCR)
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* requires a specific accessor, so we have to split it up in
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* the vmstate:
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*/
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VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU),
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VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14),
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{
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.name = "fpscr",
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.version_id = 0,
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.size = sizeof(uint32_t),
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.info = &vmstate_fpscr,
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.flags = VMS_SINGLE,
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.offset = 0,
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},
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VMSTATE_END_OF_LIST()
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}
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};
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static bool iwmmxt_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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return arm_feature(env, ARM_FEATURE_IWMMXT);
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}
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static const VMStateDescription vmstate_iwmmxt = {
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.name = "cpu/iwmmxt",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = iwmmxt_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT64_ARRAY(env.iwmmxt.regs, ARMCPU, 16),
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VMSTATE_UINT32_ARRAY(env.iwmmxt.cregs, ARMCPU, 16),
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VMSTATE_END_OF_LIST()
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}
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};
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#ifdef TARGET_AARCH64
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/* The expression ARM_MAX_VQ - 2 is 0 for pure AArch32 build,
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* and ARMPredicateReg is actively empty. This triggers errors
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* in the expansion of the VMSTATE macros.
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*/
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static bool sve_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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return cpu_isar_feature(aa64_sve, cpu);
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}
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/* The first two words of each Zreg is stored in VFP state. */
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static const VMStateDescription vmstate_zreg_hi_reg = {
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.name = "cpu/sve/zreg_hi",
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINT64_SUB_ARRAY(d, ARMVectorReg, 2, ARM_MAX_VQ - 2),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_preg_reg = {
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.name = "cpu/sve/preg",
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_UINT64_ARRAY(p, ARMPredicateReg, 2 * ARM_MAX_VQ / 8),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_sve = {
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.name = "cpu/sve",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = sve_needed,
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.fields = (VMStateField[]) {
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VMSTATE_STRUCT_ARRAY(env.vfp.zregs, ARMCPU, 32, 0,
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vmstate_zreg_hi_reg, ARMVectorReg),
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VMSTATE_STRUCT_ARRAY(env.vfp.pregs, ARMCPU, 17, 0,
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vmstate_preg_reg, ARMPredicateReg),
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VMSTATE_END_OF_LIST()
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}
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};
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#endif /* AARCH64 */
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static bool serror_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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return env->serror.pending != 0;
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}
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static const VMStateDescription vmstate_serror = {
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.name = "cpu/serror",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = serror_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT8(env.serror.pending, ARMCPU),
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VMSTATE_UINT8(env.serror.has_esr, ARMCPU),
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VMSTATE_UINT64(env.serror.esr, ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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static bool irq_line_state_needed(void *opaque)
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{
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return true;
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}
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static const VMStateDescription vmstate_irq_line_state = {
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.name = "cpu/irq-line-state",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = irq_line_state_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(env.irq_line_state, ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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static bool m_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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return arm_feature(env, ARM_FEATURE_M);
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}
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static const VMStateDescription vmstate_m_faultmask_primask = {
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.name = "cpu/m/faultmask-primask",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = m_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(env.v7m.faultmask[M_REG_NS], ARMCPU),
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VMSTATE_UINT32(env.v7m.primask[M_REG_NS], ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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/* CSSELR is in a subsection because we didn't implement it previously.
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* Migration from an old implementation will leave it at zero, which
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* is OK since the only CPUs in the old implementation make the
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* register RAZ/WI.
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* Since there was no version of QEMU which implemented the CSSELR for
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* just non-secure, we transfer both banks here rather than putting
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* the secure banked version in the m-security subsection.
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*/
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static bool csselr_vmstate_validate(void *opaque, int version_id)
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{
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ARMCPU *cpu = opaque;
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return cpu->env.v7m.csselr[M_REG_NS] <= R_V7M_CSSELR_INDEX_MASK
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&& cpu->env.v7m.csselr[M_REG_S] <= R_V7M_CSSELR_INDEX_MASK;
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}
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static bool m_csselr_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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return !arm_v7m_csselr_razwi(cpu);
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}
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static const VMStateDescription vmstate_m_csselr = {
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.name = "cpu/m/csselr",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = m_csselr_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32_ARRAY(env.v7m.csselr, ARMCPU, M_REG_NUM_BANKS),
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VMSTATE_VALIDATE("CSSELR is valid", csselr_vmstate_validate),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_m_scr = {
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.name = "cpu/m/scr",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = m_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(env.v7m.scr[M_REG_NS], ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_m_other_sp = {
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.name = "cpu/m/other-sp",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = m_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(env.v7m.other_sp, ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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static bool m_v8m_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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return arm_feature(env, ARM_FEATURE_M) && arm_feature(env, ARM_FEATURE_V8);
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}
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static const VMStateDescription vmstate_m_v8m = {
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.name = "cpu/m/v8m",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = m_v8m_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32_ARRAY(env.v7m.msplim, ARMCPU, M_REG_NUM_BANKS),
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VMSTATE_UINT32_ARRAY(env.v7m.psplim, ARMCPU, M_REG_NUM_BANKS),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_m_fp = {
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.name = "cpu/m/fp",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = vfp_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32_ARRAY(env.v7m.fpcar, ARMCPU, M_REG_NUM_BANKS),
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VMSTATE_UINT32_ARRAY(env.v7m.fpccr, ARMCPU, M_REG_NUM_BANKS),
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VMSTATE_UINT32_ARRAY(env.v7m.fpdscr, ARMCPU, M_REG_NUM_BANKS),
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VMSTATE_UINT32_ARRAY(env.v7m.cpacr, ARMCPU, M_REG_NUM_BANKS),
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VMSTATE_UINT32(env.v7m.nsacr, ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_m = {
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.name = "cpu/m",
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.version_id = 4,
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.minimum_version_id = 4,
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.needed = m_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(env.v7m.vecbase[M_REG_NS], ARMCPU),
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VMSTATE_UINT32(env.v7m.basepri[M_REG_NS], ARMCPU),
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VMSTATE_UINT32(env.v7m.control[M_REG_NS], ARMCPU),
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VMSTATE_UINT32(env.v7m.ccr[M_REG_NS], ARMCPU),
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VMSTATE_UINT32(env.v7m.cfsr[M_REG_NS], ARMCPU),
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VMSTATE_UINT32(env.v7m.hfsr, ARMCPU),
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VMSTATE_UINT32(env.v7m.dfsr, ARMCPU),
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VMSTATE_UINT32(env.v7m.mmfar[M_REG_NS], ARMCPU),
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VMSTATE_UINT32(env.v7m.bfar, ARMCPU),
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VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_NS], ARMCPU),
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VMSTATE_INT32(env.v7m.exception, ARMCPU),
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VMSTATE_END_OF_LIST()
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},
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.subsections = (const VMStateDescription*[]) {
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&vmstate_m_faultmask_primask,
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&vmstate_m_csselr,
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&vmstate_m_scr,
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&vmstate_m_other_sp,
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&vmstate_m_v8m,
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&vmstate_m_fp,
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NULL
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}
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};
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static bool thumb2ee_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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return arm_feature(env, ARM_FEATURE_THUMB2EE);
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}
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static const VMStateDescription vmstate_thumb2ee = {
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.name = "cpu/thumb2ee",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = thumb2ee_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(env.teecr, ARMCPU),
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VMSTATE_UINT32(env.teehbr, ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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static bool pmsav7_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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return arm_feature(env, ARM_FEATURE_PMSA) &&
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arm_feature(env, ARM_FEATURE_V7) &&
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!arm_feature(env, ARM_FEATURE_V8);
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}
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static bool pmsav7_rgnr_vmstate_validate(void *opaque, int version_id)
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{
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ARMCPU *cpu = opaque;
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return cpu->env.pmsav7.rnr[M_REG_NS] < cpu->pmsav7_dregion;
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}
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static const VMStateDescription vmstate_pmsav7 = {
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.name = "cpu/pmsav7",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = pmsav7_needed,
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.fields = (VMStateField[]) {
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VMSTATE_VARRAY_UINT32(env.pmsav7.drbar, ARMCPU, pmsav7_dregion, 0,
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vmstate_info_uint32, uint32_t),
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VMSTATE_VARRAY_UINT32(env.pmsav7.drsr, ARMCPU, pmsav7_dregion, 0,
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vmstate_info_uint32, uint32_t),
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VMSTATE_VARRAY_UINT32(env.pmsav7.dracr, ARMCPU, pmsav7_dregion, 0,
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vmstate_info_uint32, uint32_t),
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VMSTATE_VALIDATE("rgnr is valid", pmsav7_rgnr_vmstate_validate),
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VMSTATE_END_OF_LIST()
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}
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};
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static bool pmsav7_rnr_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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/* For R profile cores pmsav7.rnr is migrated via the cpreg
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* "RGNR" definition in helper.h. For M profile we have to
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* migrate it separately.
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*/
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return arm_feature(env, ARM_FEATURE_M);
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}
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static const VMStateDescription vmstate_pmsav7_rnr = {
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.name = "cpu/pmsav7-rnr",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = pmsav7_rnr_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(env.pmsav7.rnr[M_REG_NS], ARMCPU),
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VMSTATE_END_OF_LIST()
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}
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};
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static bool pmsav8_needed(void *opaque)
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{
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ARMCPU *cpu = opaque;
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CPUARMState *env = &cpu->env;
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|
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return arm_feature(env, ARM_FEATURE_PMSA) &&
|
|
arm_feature(env, ARM_FEATURE_V8);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_pmsav8 = {
|
|
.name = "cpu/pmsav8",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.needed = pmsav8_needed,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_NS], ARMCPU, pmsav7_dregion,
|
|
0, vmstate_info_uint32, uint32_t),
|
|
VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_NS], ARMCPU, pmsav7_dregion,
|
|
0, vmstate_info_uint32, uint32_t),
|
|
VMSTATE_UINT32(env.pmsav8.mair0[M_REG_NS], ARMCPU),
|
|
VMSTATE_UINT32(env.pmsav8.mair1[M_REG_NS], ARMCPU),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static bool s_rnr_vmstate_validate(void *opaque, int version_id)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
|
|
return cpu->env.pmsav7.rnr[M_REG_S] < cpu->pmsav7_dregion;
|
|
}
|
|
|
|
static bool sau_rnr_vmstate_validate(void *opaque, int version_id)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
|
|
return cpu->env.sau.rnr < cpu->sau_sregion;
|
|
}
|
|
|
|
static bool m_security_needed(void *opaque)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
CPUARMState *env = &cpu->env;
|
|
|
|
return arm_feature(env, ARM_FEATURE_M_SECURITY);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_m_security = {
|
|
.name = "cpu/m-security",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.needed = m_security_needed,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT32(env.v7m.secure, ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.other_ss_msp, ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.other_ss_psp, ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.basepri[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.primask[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.faultmask[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.control[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.vecbase[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.pmsav8.mair0[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.pmsav8.mair1[M_REG_S], ARMCPU),
|
|
VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_S], ARMCPU, pmsav7_dregion,
|
|
0, vmstate_info_uint32, uint32_t),
|
|
VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_S], ARMCPU, pmsav7_dregion,
|
|
0, vmstate_info_uint32, uint32_t),
|
|
VMSTATE_UINT32(env.pmsav7.rnr[M_REG_S], ARMCPU),
|
|
VMSTATE_VALIDATE("secure MPU_RNR is valid", s_rnr_vmstate_validate),
|
|
VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.ccr[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.mmfar[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.cfsr[M_REG_S], ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.sfsr, ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.sfar, ARMCPU),
|
|
VMSTATE_VARRAY_UINT32(env.sau.rbar, ARMCPU, sau_sregion, 0,
|
|
vmstate_info_uint32, uint32_t),
|
|
VMSTATE_VARRAY_UINT32(env.sau.rlar, ARMCPU, sau_sregion, 0,
|
|
vmstate_info_uint32, uint32_t),
|
|
VMSTATE_UINT32(env.sau.rnr, ARMCPU),
|
|
VMSTATE_VALIDATE("SAU_RNR is valid", sau_rnr_vmstate_validate),
|
|
VMSTATE_UINT32(env.sau.ctrl, ARMCPU),
|
|
VMSTATE_UINT32(env.v7m.scr[M_REG_S], ARMCPU),
|
|
/* AIRCR is not secure-only, but our implementation is R/O if the
|
|
* security extension is unimplemented, so we migrate it here.
|
|
*/
|
|
VMSTATE_UINT32(env.v7m.aircr, ARMCPU),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static int get_cpsr(QEMUFile *f, void *opaque, size_t size,
|
|
const VMStateField *field)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
CPUARMState *env = &cpu->env;
|
|
uint32_t val = qemu_get_be32(f);
|
|
|
|
if (arm_feature(env, ARM_FEATURE_M)) {
|
|
if (val & XPSR_EXCP) {
|
|
/* This is a CPSR format value from an older QEMU. (We can tell
|
|
* because values transferred in XPSR format always have zero
|
|
* for the EXCP field, and CPSR format will always have bit 4
|
|
* set in CPSR_M.) Rearrange it into XPSR format. The significant
|
|
* differences are that the T bit is not in the same place, the
|
|
* primask/faultmask info may be in the CPSR I and F bits, and
|
|
* we do not want the mode bits.
|
|
* We know that this cleanup happened before v8M, so there
|
|
* is no complication with banked primask/faultmask.
|
|
*/
|
|
uint32_t newval = val;
|
|
|
|
assert(!arm_feature(env, ARM_FEATURE_M_SECURITY));
|
|
|
|
newval &= (CPSR_NZCV | CPSR_Q | CPSR_IT | CPSR_GE);
|
|
if (val & CPSR_T) {
|
|
newval |= XPSR_T;
|
|
}
|
|
/* If the I or F bits are set then this is a migration from
|
|
* an old QEMU which still stored the M profile FAULTMASK
|
|
* and PRIMASK in env->daif. For a new QEMU, the data is
|
|
* transferred using the vmstate_m_faultmask_primask subsection.
|
|
*/
|
|
if (val & CPSR_F) {
|
|
env->v7m.faultmask[M_REG_NS] = 1;
|
|
}
|
|
if (val & CPSR_I) {
|
|
env->v7m.primask[M_REG_NS] = 1;
|
|
}
|
|
val = newval;
|
|
}
|
|
/* Ignore the low bits, they are handled by vmstate_m. */
|
|
xpsr_write(env, val, ~XPSR_EXCP);
|
|
return 0;
|
|
}
|
|
|
|
env->aarch64 = ((val & PSTATE_nRW) == 0);
|
|
|
|
if (is_a64(env)) {
|
|
pstate_write(env, val);
|
|
return 0;
|
|
}
|
|
|
|
cpsr_write(env, val, 0xffffffff, CPSRWriteRaw);
|
|
return 0;
|
|
}
|
|
|
|
static int put_cpsr(QEMUFile *f, void *opaque, size_t size,
|
|
const VMStateField *field, JSONWriter *vmdesc)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
CPUARMState *env = &cpu->env;
|
|
uint32_t val;
|
|
|
|
if (arm_feature(env, ARM_FEATURE_M)) {
|
|
/* The low 9 bits are v7m.exception, which is handled by vmstate_m. */
|
|
val = xpsr_read(env) & ~XPSR_EXCP;
|
|
} else if (is_a64(env)) {
|
|
val = pstate_read(env);
|
|
} else {
|
|
val = cpsr_read(env);
|
|
}
|
|
|
|
qemu_put_be32(f, val);
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateInfo vmstate_cpsr = {
|
|
.name = "cpsr",
|
|
.get = get_cpsr,
|
|
.put = put_cpsr,
|
|
};
|
|
|
|
static int get_power(QEMUFile *f, void *opaque, size_t size,
|
|
const VMStateField *field)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
bool powered_off = qemu_get_byte(f);
|
|
cpu->power_state = powered_off ? PSCI_OFF : PSCI_ON;
|
|
return 0;
|
|
}
|
|
|
|
static int put_power(QEMUFile *f, void *opaque, size_t size,
|
|
const VMStateField *field, JSONWriter *vmdesc)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
|
|
/* Migration should never happen while we transition power states */
|
|
|
|
if (cpu->power_state == PSCI_ON ||
|
|
cpu->power_state == PSCI_OFF) {
|
|
bool powered_off = (cpu->power_state == PSCI_OFF) ? true : false;
|
|
qemu_put_byte(f, powered_off);
|
|
return 0;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static const VMStateInfo vmstate_powered_off = {
|
|
.name = "powered_off",
|
|
.get = get_power,
|
|
.put = put_power,
|
|
};
|
|
|
|
static int cpu_pre_save(void *opaque)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
|
|
if (!kvm_enabled()) {
|
|
pmu_op_start(&cpu->env);
|
|
}
|
|
|
|
if (kvm_enabled()) {
|
|
if (!write_kvmstate_to_list(cpu)) {
|
|
/* This should never fail */
|
|
abort();
|
|
}
|
|
|
|
/*
|
|
* kvm_arm_cpu_pre_save() must be called after
|
|
* write_kvmstate_to_list()
|
|
*/
|
|
kvm_arm_cpu_pre_save(cpu);
|
|
} else {
|
|
if (!write_cpustate_to_list(cpu, false)) {
|
|
/* 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));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cpu_post_save(void *opaque)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
|
|
if (!kvm_enabled()) {
|
|
pmu_op_finish(&cpu->env);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cpu_pre_load(void *opaque)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
CPUARMState *env = &cpu->env;
|
|
|
|
/*
|
|
* Pre-initialize irq_line_state to a value that's never valid as
|
|
* real data, so cpu_post_load() can tell whether we've seen the
|
|
* irq-line-state subsection in the incoming migration state.
|
|
*/
|
|
env->irq_line_state = UINT32_MAX;
|
|
|
|
if (!kvm_enabled()) {
|
|
pmu_op_start(&cpu->env);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cpu_post_load(void *opaque, int version_id)
|
|
{
|
|
ARMCPU *cpu = opaque;
|
|
CPUARMState *env = &cpu->env;
|
|
int i, v;
|
|
|
|
/*
|
|
* Handle migration compatibility from old QEMU which didn't
|
|
* send the irq-line-state subsection. A QEMU without it did not
|
|
* implement the HCR_EL2.{VI,VF} bits as generating interrupts,
|
|
* so for TCG the line state matches the bits set in cs->interrupt_request.
|
|
* For KVM the line state is not stored in cs->interrupt_request
|
|
* and so this will leave irq_line_state as 0, but this is OK because
|
|
* we only need to care about it for TCG.
|
|
*/
|
|
if (env->irq_line_state == UINT32_MAX) {
|
|
CPUState *cs = CPU(cpu);
|
|
|
|
env->irq_line_state = cs->interrupt_request &
|
|
(CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIQ |
|
|
CPU_INTERRUPT_VIRQ | CPU_INTERRUPT_VFIQ);
|
|
}
|
|
|
|
/* 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, KVM_PUT_FULL_STATE)) {
|
|
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);
|
|
kvm_arm_cpu_post_load(cpu);
|
|
} else {
|
|
if (!write_list_to_cpustate(cpu)) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
hw_breakpoint_update_all(cpu);
|
|
hw_watchpoint_update_all(cpu);
|
|
|
|
if (!kvm_enabled()) {
|
|
pmu_op_finish(&cpu->env);
|
|
}
|
|
arm_rebuild_hflags(&cpu->env);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const VMStateDescription vmstate_arm_cpu = {
|
|
.name = "cpu",
|
|
.version_id = 22,
|
|
.minimum_version_id = 22,
|
|
.pre_save = cpu_pre_save,
|
|
.post_save = cpu_post_save,
|
|
.pre_load = cpu_pre_load,
|
|
.post_load = cpu_post_load,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16),
|
|
VMSTATE_UINT64_ARRAY(env.xregs, ARMCPU, 32),
|
|
VMSTATE_UINT64(env.pc, ARMCPU),
|
|
{
|
|
.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, 8),
|
|
VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 8),
|
|
VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 8),
|
|
VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5),
|
|
VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5),
|
|
VMSTATE_UINT64_ARRAY(env.elr_el, ARMCPU, 4),
|
|
VMSTATE_UINT64_ARRAY(env.sp_el, ARMCPU, 4),
|
|
/* The length-check must come before the arrays to avoid
|
|
* incoming data possibly overflowing the array.
|
|
*/
|
|
VMSTATE_INT32_POSITIVE_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_UNUSED(sizeof(uint64_t)),
|
|
VMSTATE_UINT32(env.exception.syndrome, ARMCPU),
|
|
VMSTATE_UINT32(env.exception.fsr, ARMCPU),
|
|
VMSTATE_UINT64(env.exception.vaddress, ARMCPU),
|
|
VMSTATE_TIMER_PTR(gt_timer[GTIMER_PHYS], ARMCPU),
|
|
VMSTATE_TIMER_PTR(gt_timer[GTIMER_VIRT], ARMCPU),
|
|
{
|
|
.name = "power_state",
|
|
.version_id = 0,
|
|
.size = sizeof(bool),
|
|
.info = &vmstate_powered_off,
|
|
.flags = VMS_SINGLE,
|
|
.offset = 0,
|
|
},
|
|
VMSTATE_END_OF_LIST()
|
|
},
|
|
.subsections = (const VMStateDescription*[]) {
|
|
&vmstate_vfp,
|
|
&vmstate_iwmmxt,
|
|
&vmstate_m,
|
|
&vmstate_thumb2ee,
|
|
/* pmsav7_rnr must come before pmsav7 so that we have the
|
|
* region number before we test it in the VMSTATE_VALIDATE
|
|
* in vmstate_pmsav7.
|
|
*/
|
|
&vmstate_pmsav7_rnr,
|
|
&vmstate_pmsav7,
|
|
&vmstate_pmsav8,
|
|
&vmstate_m_security,
|
|
#ifdef TARGET_AARCH64
|
|
&vmstate_sve,
|
|
#endif
|
|
&vmstate_serror,
|
|
&vmstate_irq_line_state,
|
|
NULL
|
|
}
|
|
};
|