root / target-s390x / kvm.c @ 1eecf41b
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/*
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* QEMU S390x KVM implementation
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*
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* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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* Copyright IBM Corp. 2012
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* Contributions after 2012-10-29 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*
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* You should have received a copy of the GNU (Lesser) General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/types.h> |
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#include <sys/ioctl.h> |
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#include <sys/mman.h> |
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#include <linux/kvm.h> |
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#include <asm/ptrace.h> |
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#include "qemu-common.h" |
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#include "qemu/timer.h" |
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#include "sysemu/sysemu.h" |
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#include "sysemu/kvm.h" |
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#include "cpu.h" |
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#include "sysemu/device_tree.h" |
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#include "qapi/qmp/qjson.h" |
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#include "monitor/monitor.h" |
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/* #define DEBUG_KVM */
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#ifdef DEBUG_KVM
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0) |
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#endif
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|
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#define IPA0_DIAG 0x8300 |
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#define IPA0_SIGP 0xae00 |
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#define IPA0_B2 0xb200 |
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#define IPA0_B9 0xb900 |
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#define IPA0_EB 0xeb00 |
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|
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#define PRIV_B2_SCLP_CALL 0x20 |
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#define PRIV_B2_CSCH 0x30 |
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#define PRIV_B2_HSCH 0x31 |
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#define PRIV_B2_MSCH 0x32 |
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#define PRIV_B2_SSCH 0x33 |
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#define PRIV_B2_STSCH 0x34 |
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#define PRIV_B2_TSCH 0x35 |
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#define PRIV_B2_TPI 0x36 |
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#define PRIV_B2_SAL 0x37 |
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#define PRIV_B2_RSCH 0x38 |
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#define PRIV_B2_STCRW 0x39 |
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#define PRIV_B2_STCPS 0x3a |
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#define PRIV_B2_RCHP 0x3b |
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#define PRIV_B2_SCHM 0x3c |
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#define PRIV_B2_CHSC 0x5f |
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#define PRIV_B2_SIGA 0x74 |
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#define PRIV_B2_XSCH 0x76 |
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#define PRIV_EB_SQBS 0x8a |
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#define PRIV_B9_EQBS 0x9c |
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#define DIAG_IPL 0x308 |
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#define DIAG_KVM_HYPERCALL 0x500 |
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#define DIAG_KVM_BREAKPOINT 0x501 |
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#define ICPT_INSTRUCTION 0x04 |
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#define ICPT_WAITPSW 0x1c |
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#define ICPT_SOFT_INTERCEPT 0x24 |
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#define ICPT_CPU_STOP 0x28 |
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#define ICPT_IO 0x40 |
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const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
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KVM_CAP_LAST_INFO |
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}; |
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static int cap_sync_regs; |
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static int cap_async_pf; |
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static void *legacy_s390_alloc(size_t size); |
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int kvm_arch_init(KVMState *s)
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{ |
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cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS); |
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cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF); |
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if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
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|| !kvm_check_extension(s, KVM_CAP_S390_COW)) { |
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phys_mem_set_alloc(legacy_s390_alloc); |
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} |
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return 0; |
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} |
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unsigned long kvm_arch_vcpu_id(CPUState *cpu) |
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{ |
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return cpu->cpu_index;
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} |
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int kvm_arch_init_vcpu(CPUState *cpu)
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{ |
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/* nothing todo yet */
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return 0; |
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} |
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void kvm_arch_reset_vcpu(CPUState *cpu)
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{ |
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/* The initial reset call is needed here to reset in-kernel
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* vcpu data that we can't access directly from QEMU
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* (i.e. with older kernels which don't support sync_regs/ONE_REG).
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* Before this ioctl cpu_synchronize_state() is called in common kvm
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* code (kvm-all) */
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if (kvm_vcpu_ioctl(cpu, KVM_S390_INITIAL_RESET, NULL)) { |
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perror("Can't reset vcpu\n");
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} |
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} |
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int kvm_arch_put_registers(CPUState *cs, int level) |
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{ |
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S390CPU *cpu = S390_CPU(cs); |
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CPUS390XState *env = &cpu->env; |
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struct kvm_one_reg reg;
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struct kvm_sregs sregs;
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struct kvm_regs regs;
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int ret;
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int i;
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/* always save the PSW and the GPRS*/
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cs->kvm_run->psw_addr = env->psw.addr; |
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cs->kvm_run->psw_mask = env->psw.mask; |
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if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) {
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for (i = 0; i < 16; i++) { |
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cs->kvm_run->s.regs.gprs[i] = env->regs[i]; |
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cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS; |
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} |
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} else {
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for (i = 0; i < 16; i++) { |
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regs.gprs[i] = env->regs[i]; |
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} |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s); |
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if (ret < 0) { |
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return ret;
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} |
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} |
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/* Do we need to save more than that? */
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if (level == KVM_PUT_RUNTIME_STATE) {
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return 0; |
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} |
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reg.id = KVM_REG_S390_CPU_TIMER; |
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reg.addr = (__u64)&(env->cputm); |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); |
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if (ret < 0) { |
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return ret;
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} |
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reg.id = KVM_REG_S390_CLOCK_COMP; |
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reg.addr = (__u64)&(env->ckc); |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); |
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if (ret < 0) { |
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return ret;
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} |
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reg.id = KVM_REG_S390_TODPR; |
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reg.addr = (__u64)&(env->todpr); |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); |
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if (ret < 0) { |
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return ret;
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} |
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if (cap_async_pf) {
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reg.id = KVM_REG_S390_PFTOKEN; |
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reg.addr = (__u64)&(env->pfault_token); |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); |
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if (ret < 0) { |
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return ret;
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} |
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reg.id = KVM_REG_S390_PFCOMPARE; |
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reg.addr = (__u64)&(env->pfault_compare); |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); |
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if (ret < 0) { |
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return ret;
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} |
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reg.id = KVM_REG_S390_PFSELECT; |
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reg.addr = (__u64)&(env->pfault_select); |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®); |
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if (ret < 0) { |
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return ret;
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} |
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} |
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if (cap_sync_regs &&
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cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS && |
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cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) { |
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for (i = 0; i < 16; i++) { |
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cs->kvm_run->s.regs.acrs[i] = env->aregs[i]; |
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cs->kvm_run->s.regs.crs[i] = env->cregs[i]; |
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} |
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cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS; |
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cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_CRS; |
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} else {
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for (i = 0; i < 16; i++) { |
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sregs.acrs[i] = env->aregs[i]; |
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sregs.crs[i] = env->cregs[i]; |
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} |
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ret = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs); |
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if (ret < 0) { |
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return ret;
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} |
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} |
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/* Finally the prefix */
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if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
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cs->kvm_run->s.regs.prefix = env->psa; |
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cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PREFIX; |
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} else {
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/* prefix is only supported via sync regs */
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} |
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return 0; |
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} |
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int kvm_arch_get_registers(CPUState *cs)
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{ |
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S390CPU *cpu = S390_CPU(cs); |
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CPUS390XState *env = &cpu->env; |
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struct kvm_one_reg reg;
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struct kvm_sregs sregs;
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struct kvm_regs regs;
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int i, r;
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/* get the PSW */
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env->psw.addr = cs->kvm_run->psw_addr; |
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env->psw.mask = cs->kvm_run->psw_mask; |
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/* the GPRS */
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if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) {
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for (i = 0; i < 16; i++) { |
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env->regs[i] = cs->kvm_run->s.regs.gprs[i]; |
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} |
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} else {
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r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); |
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if (r < 0) { |
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return r;
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} |
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for (i = 0; i < 16; i++) { |
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env->regs[i] = regs.gprs[i]; |
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} |
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} |
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/* The ACRS and CRS */
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if (cap_sync_regs &&
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cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS && |
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cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) { |
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for (i = 0; i < 16; i++) { |
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env->aregs[i] = cs->kvm_run->s.regs.acrs[i]; |
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env->cregs[i] = cs->kvm_run->s.regs.crs[i]; |
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} |
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} else {
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r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs); |
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if (r < 0) { |
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return r;
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} |
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for (i = 0; i < 16; i++) { |
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env->aregs[i] = sregs.acrs[i]; |
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env->cregs[i] = sregs.crs[i]; |
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} |
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} |
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/* The prefix */
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if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
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env->psa = cs->kvm_run->s.regs.prefix; |
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} |
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/* One Regs */
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reg.id = KVM_REG_S390_CPU_TIMER; |
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reg.addr = (__u64)&(env->cputm); |
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r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); |
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if (r < 0) { |
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return r;
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} |
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reg.id = KVM_REG_S390_CLOCK_COMP; |
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reg.addr = (__u64)&(env->ckc); |
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r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); |
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if (r < 0) { |
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return r;
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} |
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reg.id = KVM_REG_S390_TODPR; |
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reg.addr = (__u64)&(env->todpr); |
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r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); |
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if (r < 0) { |
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return r;
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} |
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if (cap_async_pf) {
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reg.id = KVM_REG_S390_PFTOKEN; |
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reg.addr = (__u64)&(env->pfault_token); |
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r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); |
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if (r < 0) { |
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return r;
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} |
320 |
|
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reg.id = KVM_REG_S390_PFCOMPARE; |
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reg.addr = (__u64)&(env->pfault_compare); |
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r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); |
324 |
if (r < 0) { |
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return r;
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} |
327 |
|
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reg.id = KVM_REG_S390_PFSELECT; |
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reg.addr = (__u64)&(env->pfault_select); |
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r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); |
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if (r < 0) { |
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return r;
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} |
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} |
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return 0; |
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} |
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|
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/*
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* Legacy layout for s390:
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* Older S390 KVM requires the topmost vma of the RAM to be
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* smaller than an system defined value, which is at least 256GB.
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* Larger systems have larger values. We put the guest between
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* the end of data segment (system break) and this value. We
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* use 32GB as a base to have enough room for the system break
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* to grow. We also have to use MAP parameters that avoid
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* read-only mapping of guest pages.
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*/
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static void *legacy_s390_alloc(size_t size) |
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{ |
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void *mem;
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mem = mmap((void *) 0x800000000ULL, size, |
354 |
PROT_EXEC|PROT_READ|PROT_WRITE, |
355 |
MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); |
356 |
return mem == MAP_FAILED ? NULL : mem; |
357 |
} |
358 |
|
359 |
int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
360 |
{ |
361 |
static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
362 |
|
363 |
if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) || |
364 |
cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501, 4, 1)) { |
365 |
return -EINVAL;
|
366 |
} |
367 |
return 0; |
368 |
} |
369 |
|
370 |
int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
371 |
{ |
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uint8_t t[4];
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static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
374 |
|
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if (cpu_memory_rw_debug(cs, bp->pc, t, 4, 0)) { |
376 |
return -EINVAL;
|
377 |
} else if (memcmp(t, diag_501, 4)) { |
378 |
return -EINVAL;
|
379 |
} else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { |
380 |
return -EINVAL;
|
381 |
} |
382 |
|
383 |
return 0; |
384 |
} |
385 |
|
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void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) |
387 |
{ |
388 |
} |
389 |
|
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void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) |
391 |
{ |
392 |
} |
393 |
|
394 |
int kvm_arch_process_async_events(CPUState *cs)
|
395 |
{ |
396 |
return cs->halted;
|
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} |
398 |
|
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void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm, |
400 |
uint64_t parm64, int vm)
|
401 |
{ |
402 |
CPUState *cs = CPU(cpu); |
403 |
struct kvm_s390_interrupt kvmint;
|
404 |
int r;
|
405 |
|
406 |
if (!cs->kvm_state) {
|
407 |
return;
|
408 |
} |
409 |
|
410 |
kvmint.type = type; |
411 |
kvmint.parm = parm; |
412 |
kvmint.parm64 = parm64; |
413 |
|
414 |
if (vm) {
|
415 |
r = kvm_vm_ioctl(cs->kvm_state, KVM_S390_INTERRUPT, &kvmint); |
416 |
} else {
|
417 |
r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint); |
418 |
} |
419 |
|
420 |
if (r < 0) { |
421 |
fprintf(stderr, "KVM failed to inject interrupt\n");
|
422 |
exit(1);
|
423 |
} |
424 |
} |
425 |
|
426 |
void kvm_s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token) |
427 |
{ |
428 |
kvm_s390_interrupt_internal(cpu, KVM_S390_INT_VIRTIO, config_change, |
429 |
token, 1);
|
430 |
} |
431 |
|
432 |
void kvm_s390_interrupt(S390CPU *cpu, int type, uint32_t code) |
433 |
{ |
434 |
kvm_s390_interrupt_internal(cpu, type, code, 0, 0); |
435 |
} |
436 |
|
437 |
static void enter_pgmcheck(S390CPU *cpu, uint16_t code) |
438 |
{ |
439 |
kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code); |
440 |
} |
441 |
|
442 |
static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, |
443 |
uint16_t ipbh0) |
444 |
{ |
445 |
CPUS390XState *env = &cpu->env; |
446 |
uint64_t sccb; |
447 |
uint32_t code; |
448 |
int r = 0; |
449 |
|
450 |
cpu_synchronize_state(CPU(cpu)); |
451 |
sccb = env->regs[ipbh0 & 0xf];
|
452 |
code = env->regs[(ipbh0 & 0xf0) >> 4]; |
453 |
|
454 |
r = sclp_service_call(env, sccb, code); |
455 |
if (r < 0) { |
456 |
enter_pgmcheck(cpu, -r); |
457 |
} else {
|
458 |
setcc(cpu, r); |
459 |
} |
460 |
|
461 |
return 0; |
462 |
} |
463 |
|
464 |
static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) |
465 |
{ |
466 |
CPUS390XState *env = &cpu->env; |
467 |
int rc = 0; |
468 |
uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; |
469 |
|
470 |
cpu_synchronize_state(CPU(cpu)); |
471 |
|
472 |
switch (ipa1) {
|
473 |
case PRIV_B2_XSCH:
|
474 |
ioinst_handle_xsch(cpu, env->regs[1]);
|
475 |
break;
|
476 |
case PRIV_B2_CSCH:
|
477 |
ioinst_handle_csch(cpu, env->regs[1]);
|
478 |
break;
|
479 |
case PRIV_B2_HSCH:
|
480 |
ioinst_handle_hsch(cpu, env->regs[1]);
|
481 |
break;
|
482 |
case PRIV_B2_MSCH:
|
483 |
ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb);
|
484 |
break;
|
485 |
case PRIV_B2_SSCH:
|
486 |
ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb);
|
487 |
break;
|
488 |
case PRIV_B2_STCRW:
|
489 |
ioinst_handle_stcrw(cpu, run->s390_sieic.ipb); |
490 |
break;
|
491 |
case PRIV_B2_STSCH:
|
492 |
ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb);
|
493 |
break;
|
494 |
case PRIV_B2_TSCH:
|
495 |
/* We should only get tsch via KVM_EXIT_S390_TSCH. */
|
496 |
fprintf(stderr, "Spurious tsch intercept\n");
|
497 |
break;
|
498 |
case PRIV_B2_CHSC:
|
499 |
ioinst_handle_chsc(cpu, run->s390_sieic.ipb); |
500 |
break;
|
501 |
case PRIV_B2_TPI:
|
502 |
/* This should have been handled by kvm already. */
|
503 |
fprintf(stderr, "Spurious tpi intercept\n");
|
504 |
break;
|
505 |
case PRIV_B2_SCHM:
|
506 |
ioinst_handle_schm(cpu, env->regs[1], env->regs[2], |
507 |
run->s390_sieic.ipb); |
508 |
break;
|
509 |
case PRIV_B2_RSCH:
|
510 |
ioinst_handle_rsch(cpu, env->regs[1]);
|
511 |
break;
|
512 |
case PRIV_B2_RCHP:
|
513 |
ioinst_handle_rchp(cpu, env->regs[1]);
|
514 |
break;
|
515 |
case PRIV_B2_STCPS:
|
516 |
/* We do not provide this instruction, it is suppressed. */
|
517 |
break;
|
518 |
case PRIV_B2_SAL:
|
519 |
ioinst_handle_sal(cpu, env->regs[1]);
|
520 |
break;
|
521 |
case PRIV_B2_SIGA:
|
522 |
/* Not provided, set CC = 3 for subchannel not operational */
|
523 |
setcc(cpu, 3);
|
524 |
break;
|
525 |
case PRIV_B2_SCLP_CALL:
|
526 |
rc = kvm_sclp_service_call(cpu, run, ipbh0); |
527 |
break;
|
528 |
default:
|
529 |
rc = -1;
|
530 |
DPRINTF("KVM: unhandled PRIV: 0xb2%x\n", ipa1);
|
531 |
break;
|
532 |
} |
533 |
|
534 |
return rc;
|
535 |
} |
536 |
|
537 |
static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) |
538 |
{ |
539 |
int r = 0; |
540 |
|
541 |
switch (ipa1) {
|
542 |
case PRIV_B9_EQBS:
|
543 |
/* just inject exception */
|
544 |
r = -1;
|
545 |
break;
|
546 |
default:
|
547 |
r = -1;
|
548 |
DPRINTF("KVM: unhandled PRIV: 0xb9%x\n", ipa1);
|
549 |
break;
|
550 |
} |
551 |
|
552 |
return r;
|
553 |
} |
554 |
|
555 |
static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) |
556 |
{ |
557 |
int r = 0; |
558 |
|
559 |
switch (ipa1) {
|
560 |
case PRIV_EB_SQBS:
|
561 |
/* just inject exception */
|
562 |
r = -1;
|
563 |
break;
|
564 |
default:
|
565 |
r = -1;
|
566 |
DPRINTF("KVM: unhandled PRIV: 0xeb%x\n", ipa1);
|
567 |
break;
|
568 |
} |
569 |
|
570 |
return r;
|
571 |
} |
572 |
|
573 |
static int handle_hypercall(S390CPU *cpu, struct kvm_run *run) |
574 |
{ |
575 |
CPUS390XState *env = &cpu->env; |
576 |
int ret;
|
577 |
|
578 |
cpu_synchronize_state(CPU(cpu)); |
579 |
ret = s390_virtio_hypercall(env); |
580 |
if (ret == -EINVAL) {
|
581 |
enter_pgmcheck(cpu, PGM_SPECIFICATION); |
582 |
return 0; |
583 |
} |
584 |
|
585 |
return ret;
|
586 |
} |
587 |
|
588 |
static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run) |
589 |
{ |
590 |
uint64_t r1, r3; |
591 |
|
592 |
cpu_synchronize_state(CPU(cpu)); |
593 |
r1 = (run->s390_sieic.ipa & 0x00f0) >> 8; |
594 |
r3 = run->s390_sieic.ipa & 0x000f;
|
595 |
handle_diag_308(&cpu->env, r1, r3); |
596 |
} |
597 |
|
598 |
#define DIAG_KVM_CODE_MASK 0x000000000000ffff |
599 |
|
600 |
static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb) |
601 |
{ |
602 |
int r = 0; |
603 |
uint16_t func_code; |
604 |
|
605 |
/*
|
606 |
* For any diagnose call we support, bits 48-63 of the resulting
|
607 |
* address specify the function code; the remainder is ignored.
|
608 |
*/
|
609 |
func_code = decode_basedisp_rs(&cpu->env, ipb) & DIAG_KVM_CODE_MASK; |
610 |
switch (func_code) {
|
611 |
case DIAG_IPL:
|
612 |
kvm_handle_diag_308(cpu, run); |
613 |
break;
|
614 |
case DIAG_KVM_HYPERCALL:
|
615 |
r = handle_hypercall(cpu, run); |
616 |
break;
|
617 |
case DIAG_KVM_BREAKPOINT:
|
618 |
sleep(10);
|
619 |
break;
|
620 |
default:
|
621 |
DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code);
|
622 |
r = -1;
|
623 |
break;
|
624 |
} |
625 |
|
626 |
return r;
|
627 |
} |
628 |
|
629 |
static int kvm_s390_cpu_start(S390CPU *cpu) |
630 |
{ |
631 |
s390_add_running_cpu(cpu); |
632 |
qemu_cpu_kick(CPU(cpu)); |
633 |
DPRINTF("DONE: KVM cpu start: %p\n", &cpu->env);
|
634 |
return 0; |
635 |
} |
636 |
|
637 |
int kvm_s390_cpu_restart(S390CPU *cpu)
|
638 |
{ |
639 |
kvm_s390_interrupt(cpu, KVM_S390_RESTART, 0);
|
640 |
s390_add_running_cpu(cpu); |
641 |
qemu_cpu_kick(CPU(cpu)); |
642 |
DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
|
643 |
return 0; |
644 |
} |
645 |
|
646 |
static void sigp_initial_cpu_reset(void *arg) |
647 |
{ |
648 |
CPUState *cpu = arg; |
649 |
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); |
650 |
|
651 |
cpu_synchronize_state(cpu); |
652 |
scc->initial_cpu_reset(cpu); |
653 |
} |
654 |
|
655 |
static void sigp_cpu_reset(void *arg) |
656 |
{ |
657 |
CPUState *cpu = arg; |
658 |
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); |
659 |
|
660 |
cpu_synchronize_state(cpu); |
661 |
scc->cpu_reset(cpu); |
662 |
} |
663 |
|
664 |
#define SIGP_ORDER_MASK 0x000000ff |
665 |
|
666 |
static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) |
667 |
{ |
668 |
CPUS390XState *env = &cpu->env; |
669 |
uint8_t order_code; |
670 |
uint16_t cpu_addr; |
671 |
S390CPU *target_cpu; |
672 |
uint64_t *statusreg = &env->regs[ipa1 >> 4];
|
673 |
int cc;
|
674 |
|
675 |
cpu_synchronize_state(CPU(cpu)); |
676 |
|
677 |
/* get order code */
|
678 |
order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK; |
679 |
|
680 |
cpu_addr = env->regs[ipa1 & 0x0f];
|
681 |
target_cpu = s390_cpu_addr2state(cpu_addr); |
682 |
if (target_cpu == NULL) { |
683 |
cc = 3; /* not operational */ |
684 |
goto out;
|
685 |
} |
686 |
|
687 |
switch (order_code) {
|
688 |
case SIGP_START:
|
689 |
cc = kvm_s390_cpu_start(target_cpu); |
690 |
break;
|
691 |
case SIGP_RESTART:
|
692 |
cc = kvm_s390_cpu_restart(target_cpu); |
693 |
break;
|
694 |
case SIGP_SET_ARCH:
|
695 |
*statusreg &= 0xffffffff00000000UL;
|
696 |
*statusreg |= SIGP_STAT_INVALID_PARAMETER; |
697 |
cc = 1; /* status stored */ |
698 |
break;
|
699 |
case SIGP_INITIAL_CPU_RESET:
|
700 |
run_on_cpu(CPU(target_cpu), sigp_initial_cpu_reset, CPU(target_cpu)); |
701 |
cc = 0;
|
702 |
break;
|
703 |
case SIGP_CPU_RESET:
|
704 |
run_on_cpu(CPU(target_cpu), sigp_cpu_reset, CPU(target_cpu)); |
705 |
cc = 0;
|
706 |
break;
|
707 |
default:
|
708 |
DPRINTF("KVM: unknown SIGP: 0x%x\n", order_code);
|
709 |
*statusreg &= 0xffffffff00000000UL;
|
710 |
*statusreg |= SIGP_STAT_INVALID_ORDER; |
711 |
cc = 1; /* status stored */ |
712 |
break;
|
713 |
} |
714 |
|
715 |
out:
|
716 |
setcc(cpu, cc); |
717 |
return 0; |
718 |
} |
719 |
|
720 |
static void handle_instruction(S390CPU *cpu, struct kvm_run *run) |
721 |
{ |
722 |
unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); |
723 |
uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
|
724 |
int r = -1; |
725 |
|
726 |
DPRINTF("handle_instruction 0x%x 0x%x\n",
|
727 |
run->s390_sieic.ipa, run->s390_sieic.ipb); |
728 |
switch (ipa0) {
|
729 |
case IPA0_B2:
|
730 |
r = handle_b2(cpu, run, ipa1); |
731 |
break;
|
732 |
case IPA0_B9:
|
733 |
r = handle_b9(cpu, run, ipa1); |
734 |
break;
|
735 |
case IPA0_EB:
|
736 |
r = handle_eb(cpu, run, ipa1); |
737 |
break;
|
738 |
case IPA0_DIAG:
|
739 |
r = handle_diag(cpu, run, run->s390_sieic.ipb); |
740 |
break;
|
741 |
case IPA0_SIGP:
|
742 |
r = handle_sigp(cpu, run, ipa1); |
743 |
break;
|
744 |
} |
745 |
|
746 |
if (r < 0) { |
747 |
enter_pgmcheck(cpu, 0x0001);
|
748 |
} |
749 |
} |
750 |
|
751 |
static bool is_special_wait_psw(CPUState *cs) |
752 |
{ |
753 |
/* signal quiesce */
|
754 |
return cs->kvm_run->psw_addr == 0xfffUL; |
755 |
} |
756 |
|
757 |
static int handle_intercept(S390CPU *cpu) |
758 |
{ |
759 |
CPUState *cs = CPU(cpu); |
760 |
struct kvm_run *run = cs->kvm_run;
|
761 |
int icpt_code = run->s390_sieic.icptcode;
|
762 |
int r = 0; |
763 |
|
764 |
DPRINTF("intercept: 0x%x (at 0x%lx)\n", icpt_code,
|
765 |
(long)cs->kvm_run->psw_addr);
|
766 |
switch (icpt_code) {
|
767 |
case ICPT_INSTRUCTION:
|
768 |
handle_instruction(cpu, run); |
769 |
break;
|
770 |
case ICPT_WAITPSW:
|
771 |
/* disabled wait, since enabled wait is handled in kernel */
|
772 |
if (s390_del_running_cpu(cpu) == 0) { |
773 |
if (is_special_wait_psw(cs)) {
|
774 |
qemu_system_shutdown_request(); |
775 |
} else {
|
776 |
QObject *data; |
777 |
|
778 |
data = qobject_from_jsonf("{ 'action': %s }", "pause"); |
779 |
monitor_protocol_event(QEVENT_GUEST_PANICKED, data); |
780 |
qobject_decref(data); |
781 |
vm_stop(RUN_STATE_GUEST_PANICKED); |
782 |
} |
783 |
} |
784 |
r = EXCP_HALTED; |
785 |
break;
|
786 |
case ICPT_CPU_STOP:
|
787 |
if (s390_del_running_cpu(cpu) == 0) { |
788 |
qemu_system_shutdown_request(); |
789 |
} |
790 |
r = EXCP_HALTED; |
791 |
break;
|
792 |
case ICPT_SOFT_INTERCEPT:
|
793 |
fprintf(stderr, "KVM unimplemented icpt SOFT\n");
|
794 |
exit(1);
|
795 |
break;
|
796 |
case ICPT_IO:
|
797 |
fprintf(stderr, "KVM unimplemented icpt IO\n");
|
798 |
exit(1);
|
799 |
break;
|
800 |
default:
|
801 |
fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
|
802 |
exit(1);
|
803 |
break;
|
804 |
} |
805 |
|
806 |
return r;
|
807 |
} |
808 |
|
809 |
static int handle_tsch(S390CPU *cpu) |
810 |
{ |
811 |
CPUS390XState *env = &cpu->env; |
812 |
CPUState *cs = CPU(cpu); |
813 |
struct kvm_run *run = cs->kvm_run;
|
814 |
int ret;
|
815 |
|
816 |
cpu_synchronize_state(cs); |
817 |
|
818 |
ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb);
|
819 |
if (ret >= 0) { |
820 |
/* Success; set condition code. */
|
821 |
setcc(cpu, ret); |
822 |
ret = 0;
|
823 |
} else if (ret < -1) { |
824 |
/*
|
825 |
* Failure.
|
826 |
* If an I/O interrupt had been dequeued, we have to reinject it.
|
827 |
*/
|
828 |
if (run->s390_tsch.dequeued) {
|
829 |
uint16_t subchannel_id = run->s390_tsch.subchannel_id; |
830 |
uint16_t subchannel_nr = run->s390_tsch.subchannel_nr; |
831 |
uint32_t io_int_parm = run->s390_tsch.io_int_parm; |
832 |
uint32_t io_int_word = run->s390_tsch.io_int_word; |
833 |
uint32_t type = ((subchannel_id & 0xff00) << 24) | |
834 |
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16); |
835 |
|
836 |
kvm_s390_interrupt_internal(cpu, type, |
837 |
((uint32_t)subchannel_id << 16)
|
838 |
| subchannel_nr, |
839 |
((uint64_t)io_int_parm << 32)
|
840 |
| io_int_word, 1);
|
841 |
} |
842 |
ret = 0;
|
843 |
} |
844 |
return ret;
|
845 |
} |
846 |
|
847 |
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) |
848 |
{ |
849 |
S390CPU *cpu = S390_CPU(cs); |
850 |
int ret = 0; |
851 |
|
852 |
switch (run->exit_reason) {
|
853 |
case KVM_EXIT_S390_SIEIC:
|
854 |
ret = handle_intercept(cpu); |
855 |
break;
|
856 |
case KVM_EXIT_S390_RESET:
|
857 |
qemu_system_reset_request(); |
858 |
break;
|
859 |
case KVM_EXIT_S390_TSCH:
|
860 |
ret = handle_tsch(cpu); |
861 |
break;
|
862 |
default:
|
863 |
fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
|
864 |
break;
|
865 |
} |
866 |
|
867 |
if (ret == 0) { |
868 |
ret = EXCP_INTERRUPT; |
869 |
} |
870 |
return ret;
|
871 |
} |
872 |
|
873 |
bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
|
874 |
{ |
875 |
return true; |
876 |
} |
877 |
|
878 |
int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
879 |
{ |
880 |
return 1; |
881 |
} |
882 |
|
883 |
int kvm_arch_on_sigbus(int code, void *addr) |
884 |
{ |
885 |
return 1; |
886 |
} |
887 |
|
888 |
void kvm_s390_io_interrupt(S390CPU *cpu, uint16_t subchannel_id,
|
889 |
uint16_t subchannel_nr, uint32_t io_int_parm, |
890 |
uint32_t io_int_word) |
891 |
{ |
892 |
uint32_t type; |
893 |
|
894 |
type = ((subchannel_id & 0xff00) << 24) | |
895 |
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16); |
896 |
kvm_s390_interrupt_internal(cpu, type, |
897 |
((uint32_t)subchannel_id << 16) | subchannel_nr,
|
898 |
((uint64_t)io_int_parm << 32) | io_int_word, 1); |
899 |
} |
900 |
|
901 |
void kvm_s390_crw_mchk(S390CPU *cpu)
|
902 |
{ |
903 |
kvm_s390_interrupt_internal(cpu, KVM_S390_MCHK, 1 << 28, |
904 |
0x00400f1d40330000, 1); |
905 |
} |
906 |
|
907 |
void kvm_s390_enable_css_support(S390CPU *cpu)
|
908 |
{ |
909 |
struct kvm_enable_cap cap = {};
|
910 |
int r;
|
911 |
|
912 |
/* Activate host kernel channel subsystem support. */
|
913 |
cap.cap = KVM_CAP_S390_CSS_SUPPORT; |
914 |
r = kvm_vcpu_ioctl(CPU(cpu), KVM_ENABLE_CAP, &cap); |
915 |
assert(r == 0);
|
916 |
} |
917 |
|
918 |
void kvm_arch_init_irq_routing(KVMState *s)
|
919 |
{ |
920 |
} |
921 |
|
922 |
int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
|
923 |
int vq, bool assign) |
924 |
{ |
925 |
struct kvm_ioeventfd kick = {
|
926 |
.flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY | |
927 |
KVM_IOEVENTFD_FLAG_DATAMATCH, |
928 |
.fd = event_notifier_get_fd(notifier), |
929 |
.datamatch = vq, |
930 |
.addr = sch, |
931 |
.len = 8,
|
932 |
}; |
933 |
if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
|
934 |
return -ENOSYS;
|
935 |
} |
936 |
if (!assign) {
|
937 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
938 |
} |
939 |
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
|
940 |
} |