/* * QEMU S390x KVM implementation * * Copyright (c) 2009 Alexander Graf * Copyright IBM Corp. 2012 * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * Contributions after 2012-10-29 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. * * You should have received a copy of the GNU (Lesser) General Public * License along with this library; if not, see . */ #include #include #include #include #include #include "qemu-common.h" #include "qemu/timer.h" #include "sysemu/sysemu.h" #include "sysemu/kvm.h" #include "hw/hw.h" #include "cpu.h" #include "sysemu/device_tree.h" #include "qapi/qmp/qjson.h" #include "monitor/monitor.h" #include "exec/gdbstub.h" #include "trace.h" #include "qapi-event.h" /* #define DEBUG_KVM */ #ifdef DEBUG_KVM #define DPRINTF(fmt, ...) \ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) #else #define DPRINTF(fmt, ...) \ do { } while (0) #endif #define IPA0_DIAG 0x8300 #define IPA0_SIGP 0xae00 #define IPA0_B2 0xb200 #define IPA0_B9 0xb900 #define IPA0_EB 0xeb00 #define PRIV_B2_SCLP_CALL 0x20 #define PRIV_B2_CSCH 0x30 #define PRIV_B2_HSCH 0x31 #define PRIV_B2_MSCH 0x32 #define PRIV_B2_SSCH 0x33 #define PRIV_B2_STSCH 0x34 #define PRIV_B2_TSCH 0x35 #define PRIV_B2_TPI 0x36 #define PRIV_B2_SAL 0x37 #define PRIV_B2_RSCH 0x38 #define PRIV_B2_STCRW 0x39 #define PRIV_B2_STCPS 0x3a #define PRIV_B2_RCHP 0x3b #define PRIV_B2_SCHM 0x3c #define PRIV_B2_CHSC 0x5f #define PRIV_B2_SIGA 0x74 #define PRIV_B2_XSCH 0x76 #define PRIV_EB_SQBS 0x8a #define PRIV_B9_EQBS 0x9c #define DIAG_IPL 0x308 #define DIAG_KVM_HYPERCALL 0x500 #define DIAG_KVM_BREAKPOINT 0x501 #define ICPT_INSTRUCTION 0x04 #define ICPT_PROGRAM 0x08 #define ICPT_EXT_INT 0x14 #define ICPT_WAITPSW 0x1c #define ICPT_SOFT_INTERCEPT 0x24 #define ICPT_CPU_STOP 0x28 #define ICPT_IO 0x40 static CPUWatchpoint hw_watchpoint; /* * We don't use a list because this structure is also used to transmit the * hardware breakpoints to the kernel. */ static struct kvm_hw_breakpoint *hw_breakpoints; static int nb_hw_breakpoints; const KVMCapabilityInfo kvm_arch_required_capabilities[] = { KVM_CAP_LAST_INFO }; static int cap_sync_regs; static int cap_async_pf; static void *legacy_s390_alloc(size_t size, uint64_t *align); static int kvm_s390_check_clear_cmma(KVMState *s) { struct kvm_device_attr attr = { .group = KVM_S390_VM_MEM_CTRL, .attr = KVM_S390_VM_MEM_CLR_CMMA, }; return kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attr); } static int kvm_s390_check_enable_cmma(KVMState *s) { struct kvm_device_attr attr = { .group = KVM_S390_VM_MEM_CTRL, .attr = KVM_S390_VM_MEM_ENABLE_CMMA, }; return kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attr); } void kvm_s390_clear_cmma_callback(void *opaque) { int rc; KVMState *s = opaque; struct kvm_device_attr attr = { .group = KVM_S390_VM_MEM_CTRL, .attr = KVM_S390_VM_MEM_CLR_CMMA, }; rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr); trace_kvm_clear_cmma(rc); } static void kvm_s390_enable_cmma(KVMState *s) { int rc; struct kvm_device_attr attr = { .group = KVM_S390_VM_MEM_CTRL, .attr = KVM_S390_VM_MEM_ENABLE_CMMA, }; if (kvm_s390_check_enable_cmma(s) || kvm_s390_check_clear_cmma(s)) { return; } rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr); if (!rc) { qemu_register_reset(kvm_s390_clear_cmma_callback, s); } trace_kvm_enable_cmma(rc); } int kvm_arch_init(KVMState *s) { cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS); cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF); if (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES)) { kvm_s390_enable_cmma(s); } if (!kvm_check_extension(s, KVM_CAP_S390_GMAP) || !kvm_check_extension(s, KVM_CAP_S390_COW)) { phys_mem_set_alloc(legacy_s390_alloc); } return 0; } unsigned long kvm_arch_vcpu_id(CPUState *cpu) { return cpu->cpu_index; } int kvm_arch_init_vcpu(CPUState *cs) { S390CPU *cpu = S390_CPU(cs); kvm_s390_set_cpu_state(cpu, cpu->env.cpu_state); return 0; } void kvm_s390_reset_vcpu(S390CPU *cpu) { CPUState *cs = CPU(cpu); /* The initial reset call is needed here to reset in-kernel * vcpu data that we can't access directly from QEMU * (i.e. with older kernels which don't support sync_regs/ONE_REG). * Before this ioctl cpu_synchronize_state() is called in common kvm * code (kvm-all) */ if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL)) { error_report("Initial CPU reset failed on CPU %i\n", cs->cpu_index); } } int kvm_arch_put_registers(CPUState *cs, int level) { S390CPU *cpu = S390_CPU(cs); CPUS390XState *env = &cpu->env; struct kvm_sregs sregs; struct kvm_regs regs; struct kvm_fpu fpu; int r; int i; /* always save the PSW and the GPRS*/ cs->kvm_run->psw_addr = env->psw.addr; cs->kvm_run->psw_mask = env->psw.mask; if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) { for (i = 0; i < 16; i++) { cs->kvm_run->s.regs.gprs[i] = env->regs[i]; cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS; } } else { for (i = 0; i < 16; i++) { regs.gprs[i] = env->regs[i]; } r = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s); if (r < 0) { return r; } } /* Floating point */ for (i = 0; i < 16; i++) { fpu.fprs[i] = env->fregs[i].ll; } fpu.fpc = env->fpc; r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu); if (r < 0) { return r; } /* Do we need to save more than that? */ if (level == KVM_PUT_RUNTIME_STATE) { return 0; } /* * These ONE_REGS are not protected by a capability. As they are only * necessary for migration we just trace a possible error, but don't * return with an error return code. */ kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm); kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc); kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr); kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea); kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp); if (cap_async_pf) { r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token); if (r < 0) { return r; } r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare); if (r < 0) { return r; } r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select); if (r < 0) { return r; } } if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS && cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) { for (i = 0; i < 16; i++) { cs->kvm_run->s.regs.acrs[i] = env->aregs[i]; cs->kvm_run->s.regs.crs[i] = env->cregs[i]; } cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS; cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_CRS; } else { for (i = 0; i < 16; i++) { sregs.acrs[i] = env->aregs[i]; sregs.crs[i] = env->cregs[i]; } r = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs); if (r < 0) { return r; } } /* Finally the prefix */ if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) { cs->kvm_run->s.regs.prefix = env->psa; cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PREFIX; } else { /* prefix is only supported via sync regs */ } return 0; } int kvm_arch_get_registers(CPUState *cs) { S390CPU *cpu = S390_CPU(cs); CPUS390XState *env = &cpu->env; struct kvm_sregs sregs; struct kvm_regs regs; struct kvm_fpu fpu; int i, r; /* get the PSW */ env->psw.addr = cs->kvm_run->psw_addr; env->psw.mask = cs->kvm_run->psw_mask; /* the GPRS */ if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) { for (i = 0; i < 16; i++) { env->regs[i] = cs->kvm_run->s.regs.gprs[i]; } } else { r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); if (r < 0) { return r; } for (i = 0; i < 16; i++) { env->regs[i] = regs.gprs[i]; } } /* The ACRS and CRS */ if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS && cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) { for (i = 0; i < 16; i++) { env->aregs[i] = cs->kvm_run->s.regs.acrs[i]; env->cregs[i] = cs->kvm_run->s.regs.crs[i]; } } else { r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs); if (r < 0) { return r; } for (i = 0; i < 16; i++) { env->aregs[i] = sregs.acrs[i]; env->cregs[i] = sregs.crs[i]; } } /* Floating point */ r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu); if (r < 0) { return r; } for (i = 0; i < 16; i++) { env->fregs[i].ll = fpu.fprs[i]; } env->fpc = fpu.fpc; /* The prefix */ if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) { env->psa = cs->kvm_run->s.regs.prefix; } /* * These ONE_REGS are not protected by a capability. As they are only * necessary for migration we just trace a possible error, but don't * return with an error return code. */ kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm); kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc); kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr); kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea); kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp); if (cap_async_pf) { r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token); if (r < 0) { return r; } r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare); if (r < 0) { return r; } r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select); if (r < 0) { return r; } } return 0; } /* * Legacy layout for s390: * Older S390 KVM requires the topmost vma of the RAM to be * smaller than an system defined value, which is at least 256GB. * Larger systems have larger values. We put the guest between * the end of data segment (system break) and this value. We * use 32GB as a base to have enough room for the system break * to grow. We also have to use MAP parameters that avoid * read-only mapping of guest pages. */ static void *legacy_s390_alloc(size_t size, uint64_t *align) { void *mem; mem = mmap((void *) 0x800000000ULL, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); return mem == MAP_FAILED ? NULL : mem; } /* DIAG 501 is used for sw breakpoints */ static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) { if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, sizeof(diag_501), 0) || cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501, sizeof(diag_501), 1)) { return -EINVAL; } return 0; } int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) { uint8_t t[sizeof(diag_501)]; if (cpu_memory_rw_debug(cs, bp->pc, t, sizeof(diag_501), 0)) { return -EINVAL; } else if (memcmp(t, diag_501, sizeof(diag_501))) { return -EINVAL; } else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, sizeof(diag_501), 1)) { return -EINVAL; } return 0; } static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr, int len, int type) { int n; for (n = 0; n < nb_hw_breakpoints; n++) { if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type && (hw_breakpoints[n].len == len || len == -1)) { return &hw_breakpoints[n]; } } return NULL; } static int insert_hw_breakpoint(target_ulong addr, int len, int type) { int size; if (find_hw_breakpoint(addr, len, type)) { return -EEXIST; } size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint); if (!hw_breakpoints) { nb_hw_breakpoints = 0; hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size); } else { hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size); } if (!hw_breakpoints) { nb_hw_breakpoints = 0; return -ENOMEM; } hw_breakpoints[nb_hw_breakpoints].addr = addr; hw_breakpoints[nb_hw_breakpoints].len = len; hw_breakpoints[nb_hw_breakpoints].type = type; nb_hw_breakpoints++; return 0; } int kvm_arch_insert_hw_breakpoint(target_ulong addr, target_ulong len, int type) { switch (type) { case GDB_BREAKPOINT_HW: type = KVM_HW_BP; break; case GDB_WATCHPOINT_WRITE: if (len < 1) { return -EINVAL; } type = KVM_HW_WP_WRITE; break; default: return -ENOSYS; } return insert_hw_breakpoint(addr, len, type); } int kvm_arch_remove_hw_breakpoint(target_ulong addr, target_ulong len, int type) { int size; struct kvm_hw_breakpoint *bp = find_hw_breakpoint(addr, len, type); if (bp == NULL) { return -ENOENT; } nb_hw_breakpoints--; if (nb_hw_breakpoints > 0) { /* * In order to trim the array, move the last element to the position to * be removed - if necessary. */ if (bp != &hw_breakpoints[nb_hw_breakpoints]) { *bp = hw_breakpoints[nb_hw_breakpoints]; } size = nb_hw_breakpoints * sizeof(struct kvm_hw_breakpoint); hw_breakpoints = (struct kvm_hw_breakpoint *)g_realloc(hw_breakpoints, size); } else { g_free(hw_breakpoints); hw_breakpoints = NULL; } return 0; } void kvm_arch_remove_all_hw_breakpoints(void) { nb_hw_breakpoints = 0; g_free(hw_breakpoints); hw_breakpoints = NULL; } void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg) { int i; if (nb_hw_breakpoints > 0) { dbg->arch.nr_hw_bp = nb_hw_breakpoints; dbg->arch.hw_bp = hw_breakpoints; for (i = 0; i < nb_hw_breakpoints; ++i) { hw_breakpoints[i].phys_addr = s390_cpu_get_phys_addr_debug(cpu, hw_breakpoints[i].addr); } dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; } else { dbg->arch.nr_hw_bp = 0; dbg->arch.hw_bp = NULL; } } void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) { } void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) { } int kvm_arch_process_async_events(CPUState *cs) { return cs->halted; } static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq, struct kvm_s390_interrupt *interrupt) { int r = 0; interrupt->type = irq->type; switch (irq->type) { case KVM_S390_INT_VIRTIO: interrupt->parm = irq->u.ext.ext_params; /* fall through */ case KVM_S390_INT_PFAULT_INIT: case KVM_S390_INT_PFAULT_DONE: interrupt->parm64 = irq->u.ext.ext_params2; break; case KVM_S390_PROGRAM_INT: interrupt->parm = irq->u.pgm.code; break; case KVM_S390_SIGP_SET_PREFIX: interrupt->parm = irq->u.prefix.address; break; case KVM_S390_INT_SERVICE: interrupt->parm = irq->u.ext.ext_params; break; case KVM_S390_MCHK: interrupt->parm = irq->u.mchk.cr14; interrupt->parm64 = irq->u.mchk.mcic; break; case KVM_S390_INT_EXTERNAL_CALL: interrupt->parm = irq->u.extcall.code; break; case KVM_S390_INT_EMERGENCY: interrupt->parm = irq->u.emerg.code; break; case KVM_S390_SIGP_STOP: case KVM_S390_RESTART: break; /* These types have no parameters */ case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: interrupt->parm = irq->u.io.subchannel_id << 16; interrupt->parm |= irq->u.io.subchannel_nr; interrupt->parm64 = (uint64_t)irq->u.io.io_int_parm << 32; interrupt->parm64 |= irq->u.io.io_int_word; break; default: r = -EINVAL; break; } return r; } void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq) { struct kvm_s390_interrupt kvmint = {}; CPUState *cs = CPU(cpu); int r; r = s390_kvm_irq_to_interrupt(irq, &kvmint); if (r < 0) { fprintf(stderr, "%s called with bogus interrupt\n", __func__); exit(1); } r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint); if (r < 0) { fprintf(stderr, "KVM failed to inject interrupt\n"); exit(1); } } static void __kvm_s390_floating_interrupt(struct kvm_s390_irq *irq) { struct kvm_s390_interrupt kvmint = {}; int r; r = s390_kvm_irq_to_interrupt(irq, &kvmint); if (r < 0) { fprintf(stderr, "%s called with bogus interrupt\n", __func__); exit(1); } r = kvm_vm_ioctl(kvm_state, KVM_S390_INTERRUPT, &kvmint); if (r < 0) { fprintf(stderr, "KVM failed to inject interrupt\n"); exit(1); } } void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq) { static bool use_flic = true; int r; if (use_flic) { r = kvm_s390_inject_flic(irq); if (r == -ENOSYS) { use_flic = false; } if (!r) { return; } } __kvm_s390_floating_interrupt(irq); } void kvm_s390_virtio_irq(int config_change, uint64_t token) { struct kvm_s390_irq irq = { .type = KVM_S390_INT_VIRTIO, .u.ext.ext_params = config_change, .u.ext.ext_params2 = token, }; kvm_s390_floating_interrupt(&irq); } void kvm_s390_service_interrupt(uint32_t parm) { struct kvm_s390_irq irq = { .type = KVM_S390_INT_SERVICE, .u.ext.ext_params = parm, }; kvm_s390_floating_interrupt(&irq); } static void enter_pgmcheck(S390CPU *cpu, uint16_t code) { struct kvm_s390_irq irq = { .type = KVM_S390_PROGRAM_INT, .u.pgm.code = code, }; kvm_s390_vcpu_interrupt(cpu, &irq); } static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, uint16_t ipbh0) { CPUS390XState *env = &cpu->env; uint64_t sccb; uint32_t code; int r = 0; cpu_synchronize_state(CPU(cpu)); sccb = env->regs[ipbh0 & 0xf]; code = env->regs[(ipbh0 & 0xf0) >> 4]; r = sclp_service_call(env, sccb, code); if (r < 0) { enter_pgmcheck(cpu, -r); } else { setcc(cpu, r); } return 0; } static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) { CPUS390XState *env = &cpu->env; int rc = 0; uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; cpu_synchronize_state(CPU(cpu)); switch (ipa1) { case PRIV_B2_XSCH: ioinst_handle_xsch(cpu, env->regs[1]); break; case PRIV_B2_CSCH: ioinst_handle_csch(cpu, env->regs[1]); break; case PRIV_B2_HSCH: ioinst_handle_hsch(cpu, env->regs[1]); break; case PRIV_B2_MSCH: ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb); break; case PRIV_B2_SSCH: ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb); break; case PRIV_B2_STCRW: ioinst_handle_stcrw(cpu, run->s390_sieic.ipb); break; case PRIV_B2_STSCH: ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb); break; case PRIV_B2_TSCH: /* We should only get tsch via KVM_EXIT_S390_TSCH. */ fprintf(stderr, "Spurious tsch intercept\n"); break; case PRIV_B2_CHSC: ioinst_handle_chsc(cpu, run->s390_sieic.ipb); break; case PRIV_B2_TPI: /* This should have been handled by kvm already. */ fprintf(stderr, "Spurious tpi intercept\n"); break; case PRIV_B2_SCHM: ioinst_handle_schm(cpu, env->regs[1], env->regs[2], run->s390_sieic.ipb); break; case PRIV_B2_RSCH: ioinst_handle_rsch(cpu, env->regs[1]); break; case PRIV_B2_RCHP: ioinst_handle_rchp(cpu, env->regs[1]); break; case PRIV_B2_STCPS: /* We do not provide this instruction, it is suppressed. */ break; case PRIV_B2_SAL: ioinst_handle_sal(cpu, env->regs[1]); break; case PRIV_B2_SIGA: /* Not provided, set CC = 3 for subchannel not operational */ setcc(cpu, 3); break; case PRIV_B2_SCLP_CALL: rc = kvm_sclp_service_call(cpu, run, ipbh0); break; default: rc = -1; DPRINTF("KVM: unhandled PRIV: 0xb2%x\n", ipa1); break; } return rc; } static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) { int r = 0; switch (ipa1) { case PRIV_B9_EQBS: /* just inject exception */ r = -1; break; default: r = -1; DPRINTF("KVM: unhandled PRIV: 0xb9%x\n", ipa1); break; } return r; } static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl) { int r = 0; switch (ipbl) { case PRIV_EB_SQBS: /* just inject exception */ r = -1; break; default: r = -1; DPRINTF("KVM: unhandled PRIV: 0xeb%x\n", ipbl); break; } return r; } static int handle_hypercall(S390CPU *cpu, struct kvm_run *run) { CPUS390XState *env = &cpu->env; int ret; cpu_synchronize_state(CPU(cpu)); ret = s390_virtio_hypercall(env); if (ret == -EINVAL) { enter_pgmcheck(cpu, PGM_SPECIFICATION); return 0; } return ret; } static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run) { uint64_t r1, r3; cpu_synchronize_state(CPU(cpu)); r1 = (run->s390_sieic.ipa & 0x00f0) >> 8; r3 = run->s390_sieic.ipa & 0x000f; handle_diag_308(&cpu->env, r1, r3); } static int handle_sw_breakpoint(S390CPU *cpu, struct kvm_run *run) { CPUS390XState *env = &cpu->env; unsigned long pc; cpu_synchronize_state(CPU(cpu)); pc = env->psw.addr - 4; if (kvm_find_sw_breakpoint(CPU(cpu), pc)) { env->psw.addr = pc; return EXCP_DEBUG; } return -ENOENT; } #define DIAG_KVM_CODE_MASK 0x000000000000ffff static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb) { int r = 0; uint16_t func_code; /* * For any diagnose call we support, bits 48-63 of the resulting * address specify the function code; the remainder is ignored. */ func_code = decode_basedisp_rs(&cpu->env, ipb) & DIAG_KVM_CODE_MASK; switch (func_code) { case DIAG_IPL: kvm_handle_diag_308(cpu, run); break; case DIAG_KVM_HYPERCALL: r = handle_hypercall(cpu, run); break; case DIAG_KVM_BREAKPOINT: r = handle_sw_breakpoint(cpu, run); break; default: DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code); r = -1; break; } return r; } static void sigp_cpu_start(void *arg) { CPUState *cs = arg; S390CPU *cpu = S390_CPU(cs); s390_cpu_set_state(CPU_STATE_OPERATING, cpu); DPRINTF("DONE: KVM cpu start: %p\n", &cpu->env); } static void sigp_cpu_restart(void *arg) { CPUState *cs = arg; S390CPU *cpu = S390_CPU(cs); struct kvm_s390_irq irq = { .type = KVM_S390_RESTART, }; kvm_s390_vcpu_interrupt(cpu, &irq); s390_cpu_set_state(CPU_STATE_OPERATING, cpu); } int kvm_s390_cpu_restart(S390CPU *cpu) { run_on_cpu(CPU(cpu), sigp_cpu_restart, CPU(cpu)); DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env); return 0; } static void sigp_initial_cpu_reset(void *arg) { CPUState *cpu = arg; S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); cpu_synchronize_state(cpu); scc->initial_cpu_reset(cpu); cpu_synchronize_post_reset(cpu); } static void sigp_cpu_reset(void *arg) { CPUState *cpu = arg; S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); cpu_synchronize_state(cpu); scc->cpu_reset(cpu); cpu_synchronize_post_reset(cpu); } #define SIGP_ORDER_MASK 0x000000ff static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) { CPUS390XState *env = &cpu->env; uint8_t order_code; uint16_t cpu_addr; S390CPU *target_cpu; uint64_t *statusreg = &env->regs[ipa1 >> 4]; int cc; cpu_synchronize_state(CPU(cpu)); /* get order code */ order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK; cpu_addr = env->regs[ipa1 & 0x0f]; target_cpu = s390_cpu_addr2state(cpu_addr); if (target_cpu == NULL) { cc = 3; /* not operational */ goto out; } switch (order_code) { case SIGP_START: run_on_cpu(CPU(target_cpu), sigp_cpu_start, CPU(target_cpu)); cc = 0; break; case SIGP_RESTART: run_on_cpu(CPU(target_cpu), sigp_cpu_restart, CPU(target_cpu)); cc = 0; break; case SIGP_SET_ARCH: *statusreg &= 0xffffffff00000000UL; *statusreg |= SIGP_STAT_INVALID_PARAMETER; cc = 1; /* status stored */ break; case SIGP_INITIAL_CPU_RESET: run_on_cpu(CPU(target_cpu), sigp_initial_cpu_reset, CPU(target_cpu)); cc = 0; break; case SIGP_CPU_RESET: run_on_cpu(CPU(target_cpu), sigp_cpu_reset, CPU(target_cpu)); cc = 0; break; default: DPRINTF("KVM: unknown SIGP: 0x%x\n", order_code); *statusreg &= 0xffffffff00000000UL; *statusreg |= SIGP_STAT_INVALID_ORDER; cc = 1; /* status stored */ break; } out: setcc(cpu, cc); return 0; } static int handle_instruction(S390CPU *cpu, struct kvm_run *run) { unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff; int r = -1; DPRINTF("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb); switch (ipa0) { case IPA0_B2: r = handle_b2(cpu, run, ipa1); break; case IPA0_B9: r = handle_b9(cpu, run, ipa1); break; case IPA0_EB: r = handle_eb(cpu, run, run->s390_sieic.ipb & 0xff); break; case IPA0_DIAG: r = handle_diag(cpu, run, run->s390_sieic.ipb); break; case IPA0_SIGP: r = handle_sigp(cpu, run, ipa1); break; } if (r < 0) { r = 0; enter_pgmcheck(cpu, 0x0001); } return r; } static bool is_special_wait_psw(CPUState *cs) { /* signal quiesce */ return cs->kvm_run->psw_addr == 0xfffUL; } static void guest_panicked(void) { qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, &error_abort); vm_stop(RUN_STATE_GUEST_PANICKED); } static void unmanageable_intercept(S390CPU *cpu, const char *str, int pswoffset) { CPUState *cs = CPU(cpu); error_report("Unmanageable %s! CPU%i new PSW: 0x%016lx:%016lx", str, cs->cpu_index, ldq_phys(cs->as, cpu->env.psa + pswoffset), ldq_phys(cs->as, cpu->env.psa + pswoffset + 8)); s390_cpu_halt(cpu); guest_panicked(); } static int handle_intercept(S390CPU *cpu) { CPUState *cs = CPU(cpu); struct kvm_run *run = cs->kvm_run; int icpt_code = run->s390_sieic.icptcode; int r = 0; DPRINTF("intercept: 0x%x (at 0x%lx)\n", icpt_code, (long)cs->kvm_run->psw_addr); switch (icpt_code) { case ICPT_INSTRUCTION: r = handle_instruction(cpu, run); break; case ICPT_PROGRAM: unmanageable_intercept(cpu, "program interrupt", offsetof(LowCore, program_new_psw)); r = EXCP_HALTED; break; case ICPT_EXT_INT: unmanageable_intercept(cpu, "external interrupt", offsetof(LowCore, external_new_psw)); r = EXCP_HALTED; break; case ICPT_WAITPSW: /* disabled wait, since enabled wait is handled in kernel */ cpu_synchronize_state(cs); if (s390_cpu_halt(cpu) == 0) { if (is_special_wait_psw(cs)) { qemu_system_shutdown_request(); } else { guest_panicked(); } } r = EXCP_HALTED; break; case ICPT_CPU_STOP: if (s390_cpu_set_state(CPU_STATE_STOPPED, cpu) == 0) { qemu_system_shutdown_request(); } r = EXCP_HALTED; break; case ICPT_SOFT_INTERCEPT: fprintf(stderr, "KVM unimplemented icpt SOFT\n"); exit(1); break; case ICPT_IO: fprintf(stderr, "KVM unimplemented icpt IO\n"); exit(1); break; default: fprintf(stderr, "Unknown intercept code: %d\n", icpt_code); exit(1); break; } return r; } static int handle_tsch(S390CPU *cpu) { CPUS390XState *env = &cpu->env; CPUState *cs = CPU(cpu); struct kvm_run *run = cs->kvm_run; int ret; cpu_synchronize_state(cs); ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb); if (ret >= 0) { /* Success; set condition code. */ setcc(cpu, ret); ret = 0; } else if (ret < -1) { /* * Failure. * If an I/O interrupt had been dequeued, we have to reinject it. */ if (run->s390_tsch.dequeued) { kvm_s390_io_interrupt(run->s390_tsch.subchannel_id, run->s390_tsch.subchannel_nr, run->s390_tsch.io_int_parm, run->s390_tsch.io_int_word); } ret = 0; } return ret; } static int kvm_arch_handle_debug_exit(S390CPU *cpu) { CPUState *cs = CPU(cpu); struct kvm_run *run = cs->kvm_run; int ret = 0; struct kvm_debug_exit_arch *arch_info = &run->debug.arch; switch (arch_info->type) { case KVM_HW_WP_WRITE: if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) { cs->watchpoint_hit = &hw_watchpoint; hw_watchpoint.vaddr = arch_info->addr; hw_watchpoint.flags = BP_MEM_WRITE; ret = EXCP_DEBUG; } break; case KVM_HW_BP: if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) { ret = EXCP_DEBUG; } break; case KVM_SINGLESTEP: if (cs->singlestep_enabled) { ret = EXCP_DEBUG; } break; default: ret = -ENOSYS; } return ret; } int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) { S390CPU *cpu = S390_CPU(cs); int ret = 0; switch (run->exit_reason) { case KVM_EXIT_S390_SIEIC: ret = handle_intercept(cpu); break; case KVM_EXIT_S390_RESET: qemu_system_reset_request(); break; case KVM_EXIT_S390_TSCH: ret = handle_tsch(cpu); break; case KVM_EXIT_DEBUG: ret = kvm_arch_handle_debug_exit(cpu); break; default: fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason); break; } if (ret == 0) { ret = EXCP_INTERRUPT; } return ret; } bool kvm_arch_stop_on_emulation_error(CPUState *cpu) { return true; } int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) { return 1; } int kvm_arch_on_sigbus(int code, void *addr) { return 1; } void kvm_s390_io_interrupt(uint16_t subchannel_id, uint16_t subchannel_nr, uint32_t io_int_parm, uint32_t io_int_word) { struct kvm_s390_irq irq = { .u.io.subchannel_id = subchannel_id, .u.io.subchannel_nr = subchannel_nr, .u.io.io_int_parm = io_int_parm, .u.io.io_int_word = io_int_word, }; if (io_int_word & IO_INT_WORD_AI) { irq.type = KVM_S390_INT_IO(1, 0, 0, 0); } else { irq.type = ((subchannel_id & 0xff00) << 24) | ((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16); } kvm_s390_floating_interrupt(&irq); } void kvm_s390_crw_mchk(void) { struct kvm_s390_irq irq = { .type = KVM_S390_MCHK, .u.mchk.cr14 = 1 << 28, .u.mchk.mcic = 0x00400f1d40330000ULL, }; kvm_s390_floating_interrupt(&irq); } void kvm_s390_enable_css_support(S390CPU *cpu) { int r; /* Activate host kernel channel subsystem support. */ r = kvm_vcpu_enable_cap(CPU(cpu), KVM_CAP_S390_CSS_SUPPORT, 0); assert(r == 0); } void kvm_arch_init_irq_routing(KVMState *s) { /* * Note that while irqchip capabilities generally imply that cpustates * are handled in-kernel, it is not true for s390 (yet); therefore, we * have to override the common code kvm_halt_in_kernel_allowed setting. */ if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) { kvm_irqfds_allowed = true; kvm_gsi_routing_allowed = true; kvm_halt_in_kernel_allowed = false; } } int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch, int vq, bool assign) { struct kvm_ioeventfd kick = { .flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY | KVM_IOEVENTFD_FLAG_DATAMATCH, .fd = event_notifier_get_fd(notifier), .datamatch = vq, .addr = sch, .len = 8, }; if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) { return -ENOSYS; } if (!assign) { kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; } return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); } int kvm_s390_get_memslot_count(KVMState *s) { return kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); } int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state) { struct kvm_mp_state mp_state = {}; int ret; /* the kvm part might not have been initialized yet */ if (CPU(cpu)->kvm_state == NULL) { return 0; } switch (cpu_state) { case CPU_STATE_STOPPED: mp_state.mp_state = KVM_MP_STATE_STOPPED; break; case CPU_STATE_CHECK_STOP: mp_state.mp_state = KVM_MP_STATE_CHECK_STOP; break; case CPU_STATE_OPERATING: mp_state.mp_state = KVM_MP_STATE_OPERATING; break; case CPU_STATE_LOAD: mp_state.mp_state = KVM_MP_STATE_LOAD; break; default: error_report("Requested CPU state is not a valid S390 CPU state: %u", cpu_state); exit(1); } ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); if (ret) { trace_kvm_failed_cpu_state_set(CPU(cpu)->cpu_index, cpu_state, strerror(-ret)); } return ret; }