| #include "qemu/osdep.h" |
| #include "qemu-common.h" |
| #include "cpu.h" |
| #include "hw/hw.h" |
| #include "hw/boards.h" |
| #include "qemu/error-report.h" |
| #include "sysemu/kvm.h" |
| #include "kvm_arm.h" |
| #include "internals.h" |
| #include "migration/cpu.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, |
| VMStateField *field) |
| { |
| ARMCPU *cpu = opaque; |
| CPUARMState *env = &cpu->env; |
| uint32_t val = qemu_get_be32(f); |
| |
| vfp_set_fpscr(env, val); |
| return 0; |
| } |
| |
| static int put_fpscr(QEMUFile *f, void *opaque, size_t size, |
| VMStateField *field, QJSON *vmdesc) |
| { |
| ARMCPU *cpu = opaque; |
| CPUARMState *env = &cpu->env; |
| |
| qemu_put_be32(f, vfp_get_fpscr(env)); |
| return 0; |
| } |
| |
| 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, |
| .needed = vfp_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT64_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, |
| .needed = iwmmxt_needed, |
| .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_faultmask_primask = { |
| .name = "cpu/m/faultmask-primask", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(env.v7m.faultmask[M_REG_NS], ARMCPU), |
| VMSTATE_UINT32(env.v7m.primask[M_REG_NS], ARMCPU), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_m = { |
| .name = "cpu/m", |
| .version_id = 4, |
| .minimum_version_id = 4, |
| .needed = m_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(env.v7m.vecbase[M_REG_NS], ARMCPU), |
| VMSTATE_UINT32(env.v7m.basepri[M_REG_NS], ARMCPU), |
| VMSTATE_UINT32(env.v7m.control[M_REG_NS], ARMCPU), |
| VMSTATE_UINT32(env.v7m.ccr[M_REG_NS], ARMCPU), |
| VMSTATE_UINT32(env.v7m.cfsr[M_REG_NS], ARMCPU), |
| VMSTATE_UINT32(env.v7m.hfsr, ARMCPU), |
| VMSTATE_UINT32(env.v7m.dfsr, ARMCPU), |
| VMSTATE_UINT32(env.v7m.mmfar[M_REG_NS], ARMCPU), |
| VMSTATE_UINT32(env.v7m.bfar, ARMCPU), |
| VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_NS], ARMCPU), |
| VMSTATE_INT32(env.v7m.exception, ARMCPU), |
| VMSTATE_END_OF_LIST() |
| }, |
| .subsections = (const VMStateDescription*[]) { |
| &vmstate_m_faultmask_primask, |
| NULL |
| } |
| }; |
| |
| 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, |
| .needed = thumb2ee_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(env.teecr, ARMCPU), |
| VMSTATE_UINT32(env.teehbr, ARMCPU), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static bool pmsav7_needed(void *opaque) |
| { |
| ARMCPU *cpu = opaque; |
| CPUARMState *env = &cpu->env; |
| |
| return arm_feature(env, ARM_FEATURE_PMSA) && |
| arm_feature(env, ARM_FEATURE_V7) && |
| !arm_feature(env, ARM_FEATURE_V8); |
| } |
| |
| static bool pmsav7_rgnr_vmstate_validate(void *opaque, int version_id) |
| { |
| ARMCPU *cpu = opaque; |
| |
| return cpu->env.pmsav7.rnr[M_REG_NS] < cpu->pmsav7_dregion; |
| } |
| |
| static const VMStateDescription vmstate_pmsav7 = { |
| .name = "cpu/pmsav7", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .needed = pmsav7_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_VARRAY_UINT32(env.pmsav7.drbar, ARMCPU, pmsav7_dregion, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VARRAY_UINT32(env.pmsav7.drsr, ARMCPU, pmsav7_dregion, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VARRAY_UINT32(env.pmsav7.dracr, ARMCPU, pmsav7_dregion, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VALIDATE("rgnr is valid", pmsav7_rgnr_vmstate_validate), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static bool pmsav7_rnr_needed(void *opaque) |
| { |
| ARMCPU *cpu = opaque; |
| CPUARMState *env = &cpu->env; |
| |
| /* For R profile cores pmsav7.rnr is migrated via the cpreg |
| * "RGNR" definition in helper.h. For M profile we have to |
| * migrate it separately. |
| */ |
| return arm_feature(env, ARM_FEATURE_M); |
| } |
| |
| static const VMStateDescription vmstate_pmsav7_rnr = { |
| .name = "cpu/pmsav7-rnr", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .needed = pmsav7_rnr_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(env.pmsav7.rnr[M_REG_NS], ARMCPU), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static bool pmsav8_needed(void *opaque) |
| { |
| ARMCPU *cpu = opaque; |
| CPUARMState *env = &cpu->env; |
| |
| 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_END_OF_LIST() |
| } |
| }; |
| |
| static int get_cpsr(QEMUFile *f, void *opaque, size_t size, |
| 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, |
| VMStateField *field, QJSON *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, |
| 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, |
| VMStateField *field, QJSON *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()) { |
| 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)); |
| |
| return 0; |
| } |
| |
| 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, 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); |
| } else { |
| if (!write_list_to_cpustate(cpu)) { |
| return -1; |
| } |
| } |
| |
| hw_breakpoint_update_all(cpu); |
| hw_watchpoint_update_all(cpu); |
| |
| return 0; |
| } |
| |
| const VMStateDescription vmstate_arm_cpu = { |
| .name = "cpu", |
| .version_id = 22, |
| .minimum_version_id = 22, |
| .pre_save = cpu_pre_save, |
| .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_UINT64(env.features, ARMCPU), |
| 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, |
| NULL |
| } |
| }; |
