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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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#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_SCLP_CALL 0x20 |
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#define PRIV_CSCH 0x30 |
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#define PRIV_HSCH 0x31 |
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#define PRIV_MSCH 0x32 |
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#define PRIV_SSCH 0x33 |
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#define PRIV_STSCH 0x34 |
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#define PRIV_TSCH 0x35 |
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#define PRIV_TPI 0x36 |
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#define PRIV_SAL 0x37 |
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#define PRIV_RSCH 0x38 |
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#define PRIV_STCRW 0x39 |
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#define PRIV_STCPS 0x3a |
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#define PRIV_RCHP 0x3b |
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#define PRIV_SCHM 0x3c |
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#define PRIV_CHSC 0x5f |
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#define PRIV_SIGA 0x74 |
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#define PRIV_XSCH 0x76 |
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#define PRIV_SQBS 0x8a |
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#define PRIV_EQBS 0x9c |
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#define DIAG_KVM_HYPERCALL 0x500 |
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#define DIAG_KVM_BREAKPOINT 0x501 |
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|
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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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#define SIGP_RESTART 0x06 |
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#define SIGP_INITIAL_CPU_RESET 0x0b |
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#define SIGP_STORE_STATUS_ADDR 0x0e |
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#define SIGP_SET_ARCH 0x12 |
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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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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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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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if (env->runtime_reg_dirty_mask == KVM_S390_RUNTIME_DIRTY_FULL) {
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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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} |
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env->runtime_reg_dirty_mask = KVM_S390_RUNTIME_DIRTY_NONE; |
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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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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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int r;
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r = kvm_s390_get_registers_partial(cs); |
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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_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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env->runtime_reg_dirty_mask = KVM_S390_RUNTIME_DIRTY_FULL; |
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return 0; |
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} |
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int kvm_s390_get_registers_partial(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_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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if (env->runtime_reg_dirty_mask) {
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return 0; |
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} |
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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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ret = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s); |
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if (ret < 0) { |
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return ret;
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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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ret = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs); |
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if (ret < 0) { |
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return ret;
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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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/* Finally 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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} else {
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/* no prefix without sync regs */
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} |
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env->runtime_reg_dirty_mask = KVM_S390_RUNTIME_DIRTY_PARTIAL; |
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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(ram_addr_t size) |
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{ |
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void *mem;
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mem = mmap((void *) 0x800000000ULL, size, |
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PROT_EXEC|PROT_READ|PROT_WRITE, |
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MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); |
328 |
if (mem == MAP_FAILED) {
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fprintf(stderr, "Allocating RAM failed\n");
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abort(); |
331 |
} |
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return mem;
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} |
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|
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void *kvm_arch_ram_alloc(ram_addr_t size)
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{ |
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/* Can we use the standard allocation ? */
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if (kvm_check_extension(kvm_state, KVM_CAP_S390_GMAP) &&
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kvm_check_extension(kvm_state, KVM_CAP_S390_COW)) { |
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return NULL; |
341 |
} else {
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return legacy_s390_alloc(size);
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} |
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} |
345 |
|
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int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
347 |
{ |
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S390CPU *cpu = S390_CPU(cs); |
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CPUS390XState *env = &cpu->env; |
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static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
351 |
|
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if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) || |
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cpu_memory_rw_debug(env, bp->pc, (uint8_t *)diag_501, 4, 1)) { |
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return -EINVAL;
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} |
356 |
return 0; |
357 |
} |
358 |
|
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int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
360 |
{ |
361 |
S390CPU *cpu = S390_CPU(cs); |
362 |
CPUS390XState *env = &cpu->env; |
363 |
uint8_t t[4];
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static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
365 |
|
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if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) { |
367 |
return -EINVAL;
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368 |
} else if (memcmp(t, diag_501, 4)) { |
369 |
return -EINVAL;
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} else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { |
371 |
return -EINVAL;
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372 |
} |
373 |
|
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return 0; |
375 |
} |
376 |
|
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void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) |
378 |
{ |
379 |
} |
380 |
|
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void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) |
382 |
{ |
383 |
} |
384 |
|
385 |
int kvm_arch_process_async_events(CPUState *cs)
|
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{ |
387 |
return cs->halted;
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} |
389 |
|
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void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm, |
391 |
uint64_t parm64, int vm)
|
392 |
{ |
393 |
CPUState *cs = CPU(cpu); |
394 |
struct kvm_s390_interrupt kvmint;
|
395 |
int r;
|
396 |
|
397 |
if (!cs->kvm_state) {
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398 |
return;
|
399 |
} |
400 |
|
401 |
kvmint.type = type; |
402 |
kvmint.parm = parm; |
403 |
kvmint.parm64 = parm64; |
404 |
|
405 |
if (vm) {
|
406 |
r = kvm_vm_ioctl(cs->kvm_state, KVM_S390_INTERRUPT, &kvmint); |
407 |
} else {
|
408 |
r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint); |
409 |
} |
410 |
|
411 |
if (r < 0) { |
412 |
fprintf(stderr, "KVM failed to inject interrupt\n");
|
413 |
exit(1);
|
414 |
} |
415 |
} |
416 |
|
417 |
void kvm_s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token) |
418 |
{ |
419 |
kvm_s390_interrupt_internal(cpu, KVM_S390_INT_VIRTIO, config_change, |
420 |
token, 1);
|
421 |
} |
422 |
|
423 |
void kvm_s390_interrupt(S390CPU *cpu, int type, uint32_t code) |
424 |
{ |
425 |
kvm_s390_interrupt_internal(cpu, type, code, 0, 0); |
426 |
} |
427 |
|
428 |
static void enter_pgmcheck(S390CPU *cpu, uint16_t code) |
429 |
{ |
430 |
kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code); |
431 |
} |
432 |
|
433 |
static inline void setcc(S390CPU *cpu, uint64_t cc) |
434 |
{ |
435 |
CPUS390XState *env = &cpu->env; |
436 |
CPUState *cs = CPU(cpu); |
437 |
|
438 |
cs->kvm_run->psw_mask &= ~(3ull << 44); |
439 |
cs->kvm_run->psw_mask |= (cc & 3) << 44; |
440 |
|
441 |
env->psw.mask &= ~(3ul << 44); |
442 |
env->psw.mask |= (cc & 3) << 44; |
443 |
} |
444 |
|
445 |
static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, |
446 |
uint16_t ipbh0) |
447 |
{ |
448 |
CPUS390XState *env = &cpu->env; |
449 |
uint32_t sccb; |
450 |
uint64_t code; |
451 |
int r = 0; |
452 |
|
453 |
cpu_synchronize_state(CPU(cpu)); |
454 |
sccb = env->regs[ipbh0 & 0xf];
|
455 |
code = env->regs[(ipbh0 & 0xf0) >> 4]; |
456 |
|
457 |
r = sclp_service_call(sccb, code); |
458 |
if (r < 0) { |
459 |
enter_pgmcheck(cpu, -r); |
460 |
} |
461 |
setcc(cpu, r); |
462 |
|
463 |
return 0; |
464 |
} |
465 |
|
466 |
static int kvm_handle_css_inst(S390CPU *cpu, struct kvm_run *run, |
467 |
uint8_t ipa0, uint8_t ipa1, uint8_t ipb) |
468 |
{ |
469 |
int r = 0; |
470 |
int no_cc = 0; |
471 |
CPUS390XState *env = &cpu->env; |
472 |
CPUState *cs = ENV_GET_CPU(env); |
473 |
|
474 |
if (ipa0 != 0xb2) { |
475 |
/* Not handled for now. */
|
476 |
return -1; |
477 |
} |
478 |
|
479 |
kvm_s390_get_registers_partial(cs); |
480 |
cs->kvm_vcpu_dirty = true;
|
481 |
|
482 |
switch (ipa1) {
|
483 |
case PRIV_XSCH:
|
484 |
r = ioinst_handle_xsch(env, env->regs[1]);
|
485 |
break;
|
486 |
case PRIV_CSCH:
|
487 |
r = ioinst_handle_csch(env, env->regs[1]);
|
488 |
break;
|
489 |
case PRIV_HSCH:
|
490 |
r = ioinst_handle_hsch(env, env->regs[1]);
|
491 |
break;
|
492 |
case PRIV_MSCH:
|
493 |
r = ioinst_handle_msch(env, env->regs[1], run->s390_sieic.ipb);
|
494 |
break;
|
495 |
case PRIV_SSCH:
|
496 |
r = ioinst_handle_ssch(env, env->regs[1], run->s390_sieic.ipb);
|
497 |
break;
|
498 |
case PRIV_STCRW:
|
499 |
r = ioinst_handle_stcrw(env, run->s390_sieic.ipb); |
500 |
break;
|
501 |
case PRIV_STSCH:
|
502 |
r = ioinst_handle_stsch(env, env->regs[1], run->s390_sieic.ipb);
|
503 |
break;
|
504 |
case PRIV_TSCH:
|
505 |
/* We should only get tsch via KVM_EXIT_S390_TSCH. */
|
506 |
fprintf(stderr, "Spurious tsch intercept\n");
|
507 |
break;
|
508 |
case PRIV_CHSC:
|
509 |
r = ioinst_handle_chsc(env, run->s390_sieic.ipb); |
510 |
break;
|
511 |
case PRIV_TPI:
|
512 |
/* This should have been handled by kvm already. */
|
513 |
fprintf(stderr, "Spurious tpi intercept\n");
|
514 |
break;
|
515 |
case PRIV_SCHM:
|
516 |
no_cc = 1;
|
517 |
r = ioinst_handle_schm(env, env->regs[1], env->regs[2], |
518 |
run->s390_sieic.ipb); |
519 |
break;
|
520 |
case PRIV_RSCH:
|
521 |
r = ioinst_handle_rsch(env, env->regs[1]);
|
522 |
break;
|
523 |
case PRIV_RCHP:
|
524 |
r = ioinst_handle_rchp(env, env->regs[1]);
|
525 |
break;
|
526 |
case PRIV_STCPS:
|
527 |
/* We do not provide this instruction, it is suppressed. */
|
528 |
no_cc = 1;
|
529 |
r = 0;
|
530 |
break;
|
531 |
case PRIV_SAL:
|
532 |
no_cc = 1;
|
533 |
r = ioinst_handle_sal(env, env->regs[1]);
|
534 |
break;
|
535 |
default:
|
536 |
r = -1;
|
537 |
break;
|
538 |
} |
539 |
|
540 |
if (r >= 0) { |
541 |
if (!no_cc) {
|
542 |
setcc(cpu, r); |
543 |
} |
544 |
r = 0;
|
545 |
} else if (r < -1) { |
546 |
r = 0;
|
547 |
} |
548 |
return r;
|
549 |
} |
550 |
|
551 |
static int is_ioinst(uint8_t ipa0, uint8_t ipa1, uint8_t ipb) |
552 |
{ |
553 |
int ret = 0; |
554 |
uint16_t ipa = (ipa0 << 8) | ipa1;
|
555 |
|
556 |
switch (ipa) {
|
557 |
case IPA0_B2 | PRIV_CSCH:
|
558 |
case IPA0_B2 | PRIV_HSCH:
|
559 |
case IPA0_B2 | PRIV_MSCH:
|
560 |
case IPA0_B2 | PRIV_SSCH:
|
561 |
case IPA0_B2 | PRIV_STSCH:
|
562 |
case IPA0_B2 | PRIV_TPI:
|
563 |
case IPA0_B2 | PRIV_SAL:
|
564 |
case IPA0_B2 | PRIV_RSCH:
|
565 |
case IPA0_B2 | PRIV_STCRW:
|
566 |
case IPA0_B2 | PRIV_STCPS:
|
567 |
case IPA0_B2 | PRIV_RCHP:
|
568 |
case IPA0_B2 | PRIV_SCHM:
|
569 |
case IPA0_B2 | PRIV_CHSC:
|
570 |
case IPA0_B2 | PRIV_SIGA:
|
571 |
case IPA0_B2 | PRIV_XSCH:
|
572 |
case IPA0_B9 | PRIV_EQBS:
|
573 |
case IPA0_EB | PRIV_SQBS:
|
574 |
ret = 1;
|
575 |
break;
|
576 |
} |
577 |
|
578 |
return ret;
|
579 |
} |
580 |
|
581 |
static int handle_priv(S390CPU *cpu, struct kvm_run *run, |
582 |
uint8_t ipa0, uint8_t ipa1) |
583 |
{ |
584 |
int r = 0; |
585 |
uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; |
586 |
uint8_t ipb = run->s390_sieic.ipb & 0xff;
|
587 |
|
588 |
dprintf("KVM: PRIV: %d\n", ipa1);
|
589 |
switch (ipa1) {
|
590 |
case PRIV_SCLP_CALL:
|
591 |
r = kvm_sclp_service_call(cpu, run, ipbh0); |
592 |
break;
|
593 |
default:
|
594 |
if (is_ioinst(ipa0, ipa1, ipb)) {
|
595 |
r = kvm_handle_css_inst(cpu, run, ipa0, ipa1, ipb); |
596 |
if (r == -1) { |
597 |
setcc(cpu, 3);
|
598 |
r = 0;
|
599 |
} |
600 |
} else {
|
601 |
dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
|
602 |
r = -1;
|
603 |
} |
604 |
break;
|
605 |
} |
606 |
|
607 |
return r;
|
608 |
} |
609 |
|
610 |
static int handle_hypercall(CPUS390XState *env, struct kvm_run *run) |
611 |
{ |
612 |
CPUState *cs = ENV_GET_CPU(env); |
613 |
|
614 |
kvm_s390_get_registers_partial(cs); |
615 |
cs->kvm_vcpu_dirty = true;
|
616 |
env->regs[2] = s390_virtio_hypercall(env);
|
617 |
|
618 |
return 0; |
619 |
} |
620 |
|
621 |
static int handle_diag(CPUS390XState *env, struct kvm_run *run, int ipb_code) |
622 |
{ |
623 |
int r = 0; |
624 |
|
625 |
switch (ipb_code) {
|
626 |
case DIAG_KVM_HYPERCALL:
|
627 |
r = handle_hypercall(env, run); |
628 |
break;
|
629 |
case DIAG_KVM_BREAKPOINT:
|
630 |
sleep(10);
|
631 |
break;
|
632 |
default:
|
633 |
dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
|
634 |
r = -1;
|
635 |
break;
|
636 |
} |
637 |
|
638 |
return r;
|
639 |
} |
640 |
|
641 |
static int s390_cpu_restart(S390CPU *cpu) |
642 |
{ |
643 |
kvm_s390_interrupt(cpu, KVM_S390_RESTART, 0);
|
644 |
s390_add_running_cpu(cpu); |
645 |
qemu_cpu_kick(CPU(cpu)); |
646 |
dprintf("DONE: SIGP cpu restart: %p\n", &cpu->env);
|
647 |
return 0; |
648 |
} |
649 |
|
650 |
static int s390_store_status(CPUS390XState *env, uint32_t parameter) |
651 |
{ |
652 |
/* XXX */
|
653 |
fprintf(stderr, "XXX SIGP store status\n");
|
654 |
return -1; |
655 |
} |
656 |
|
657 |
static int s390_cpu_initial_reset(S390CPU *cpu) |
658 |
{ |
659 |
CPUState *cs = CPU(cpu); |
660 |
CPUS390XState *env = &cpu->env; |
661 |
int i;
|
662 |
|
663 |
s390_del_running_cpu(cpu); |
664 |
if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL) < 0) { |
665 |
perror("cannot init reset vcpu");
|
666 |
} |
667 |
|
668 |
/* Manually zero out all registers */
|
669 |
cpu_synchronize_state(cs); |
670 |
for (i = 0; i < 16; i++) { |
671 |
env->regs[i] = 0;
|
672 |
} |
673 |
|
674 |
dprintf("DONE: SIGP initial reset: %p\n", env);
|
675 |
return 0; |
676 |
} |
677 |
|
678 |
static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) |
679 |
{ |
680 |
CPUS390XState *env = &cpu->env; |
681 |
uint8_t order_code; |
682 |
uint32_t parameter; |
683 |
uint16_t cpu_addr; |
684 |
uint8_t t; |
685 |
int r = -1; |
686 |
S390CPU *target_cpu; |
687 |
CPUS390XState *target_env; |
688 |
|
689 |
cpu_synchronize_state(CPU(cpu)); |
690 |
|
691 |
/* get order code */
|
692 |
order_code = run->s390_sieic.ipb >> 28;
|
693 |
if (order_code > 0) { |
694 |
order_code = env->regs[order_code]; |
695 |
} |
696 |
order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16; |
697 |
|
698 |
/* get parameters */
|
699 |
t = (ipa1 & 0xf0) >> 4; |
700 |
if (!(t % 2)) { |
701 |
t++; |
702 |
} |
703 |
|
704 |
parameter = env->regs[t] & 0x7ffffe00;
|
705 |
cpu_addr = env->regs[ipa1 & 0x0f];
|
706 |
|
707 |
target_cpu = s390_cpu_addr2state(cpu_addr); |
708 |
if (target_cpu == NULL) { |
709 |
goto out;
|
710 |
} |
711 |
target_env = &target_cpu->env; |
712 |
|
713 |
switch (order_code) {
|
714 |
case SIGP_RESTART:
|
715 |
r = s390_cpu_restart(target_cpu); |
716 |
break;
|
717 |
case SIGP_STORE_STATUS_ADDR:
|
718 |
r = s390_store_status(target_env, parameter); |
719 |
break;
|
720 |
case SIGP_SET_ARCH:
|
721 |
/* make the caller panic */
|
722 |
return -1; |
723 |
case SIGP_INITIAL_CPU_RESET:
|
724 |
r = s390_cpu_initial_reset(target_cpu); |
725 |
break;
|
726 |
default:
|
727 |
fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", order_code);
|
728 |
break;
|
729 |
} |
730 |
|
731 |
out:
|
732 |
setcc(cpu, r ? 3 : 0); |
733 |
return 0; |
734 |
} |
735 |
|
736 |
static int handle_instruction(S390CPU *cpu, struct kvm_run *run) |
737 |
{ |
738 |
CPUS390XState *env = &cpu->env; |
739 |
unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); |
740 |
uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
|
741 |
int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16; |
742 |
int r = -1; |
743 |
|
744 |
dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
|
745 |
switch (ipa0) {
|
746 |
case IPA0_B2:
|
747 |
case IPA0_B9:
|
748 |
case IPA0_EB:
|
749 |
r = handle_priv(cpu, run, ipa0 >> 8, ipa1);
|
750 |
break;
|
751 |
case IPA0_DIAG:
|
752 |
r = handle_diag(env, run, ipb_code); |
753 |
break;
|
754 |
case IPA0_SIGP:
|
755 |
r = handle_sigp(cpu, run, ipa1); |
756 |
break;
|
757 |
} |
758 |
|
759 |
if (r < 0) { |
760 |
enter_pgmcheck(cpu, 0x0001);
|
761 |
} |
762 |
return 0; |
763 |
} |
764 |
|
765 |
static bool is_special_wait_psw(CPUState *cs) |
766 |
{ |
767 |
/* signal quiesce */
|
768 |
return cs->kvm_run->psw_addr == 0xfffUL; |
769 |
} |
770 |
|
771 |
static int handle_intercept(S390CPU *cpu) |
772 |
{ |
773 |
CPUState *cs = CPU(cpu); |
774 |
struct kvm_run *run = cs->kvm_run;
|
775 |
int icpt_code = run->s390_sieic.icptcode;
|
776 |
int r = 0; |
777 |
|
778 |
dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code,
|
779 |
(long)cs->kvm_run->psw_addr);
|
780 |
switch (icpt_code) {
|
781 |
case ICPT_INSTRUCTION:
|
782 |
r = handle_instruction(cpu, run); |
783 |
break;
|
784 |
case ICPT_WAITPSW:
|
785 |
/* disabled wait, since enabled wait is handled in kernel */
|
786 |
if (s390_del_running_cpu(cpu) == 0) { |
787 |
if (is_special_wait_psw(cs)) {
|
788 |
qemu_system_shutdown_request(); |
789 |
} else {
|
790 |
QObject *data; |
791 |
|
792 |
data = qobject_from_jsonf("{ 'action': %s }", "pause"); |
793 |
monitor_protocol_event(QEVENT_GUEST_PANICKED, data); |
794 |
qobject_decref(data); |
795 |
vm_stop(RUN_STATE_GUEST_PANICKED); |
796 |
} |
797 |
} |
798 |
r = EXCP_HALTED; |
799 |
break;
|
800 |
case ICPT_CPU_STOP:
|
801 |
if (s390_del_running_cpu(cpu) == 0) { |
802 |
qemu_system_shutdown_request(); |
803 |
} |
804 |
r = EXCP_HALTED; |
805 |
break;
|
806 |
case ICPT_SOFT_INTERCEPT:
|
807 |
fprintf(stderr, "KVM unimplemented icpt SOFT\n");
|
808 |
exit(1);
|
809 |
break;
|
810 |
case ICPT_IO:
|
811 |
fprintf(stderr, "KVM unimplemented icpt IO\n");
|
812 |
exit(1);
|
813 |
break;
|
814 |
default:
|
815 |
fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
|
816 |
exit(1);
|
817 |
break;
|
818 |
} |
819 |
|
820 |
return r;
|
821 |
} |
822 |
|
823 |
static int handle_tsch(S390CPU *cpu) |
824 |
{ |
825 |
CPUS390XState *env = &cpu->env; |
826 |
CPUState *cs = CPU(cpu); |
827 |
struct kvm_run *run = cs->kvm_run;
|
828 |
int ret;
|
829 |
|
830 |
kvm_s390_get_registers_partial(cs); |
831 |
cs->kvm_vcpu_dirty = true;
|
832 |
|
833 |
ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb);
|
834 |
if (ret >= 0) { |
835 |
/* Success; set condition code. */
|
836 |
setcc(cpu, ret); |
837 |
ret = 0;
|
838 |
} else if (ret < -1) { |
839 |
/*
|
840 |
* Failure.
|
841 |
* If an I/O interrupt had been dequeued, we have to reinject it.
|
842 |
*/
|
843 |
if (run->s390_tsch.dequeued) {
|
844 |
uint16_t subchannel_id = run->s390_tsch.subchannel_id; |
845 |
uint16_t subchannel_nr = run->s390_tsch.subchannel_nr; |
846 |
uint32_t io_int_parm = run->s390_tsch.io_int_parm; |
847 |
uint32_t io_int_word = run->s390_tsch.io_int_word; |
848 |
uint32_t type = ((subchannel_id & 0xff00) << 24) | |
849 |
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16); |
850 |
|
851 |
kvm_s390_interrupt_internal(cpu, type, |
852 |
((uint32_t)subchannel_id << 16)
|
853 |
| subchannel_nr, |
854 |
((uint64_t)io_int_parm << 32)
|
855 |
| io_int_word, 1);
|
856 |
} |
857 |
ret = 0;
|
858 |
} |
859 |
return ret;
|
860 |
} |
861 |
|
862 |
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) |
863 |
{ |
864 |
S390CPU *cpu = S390_CPU(cs); |
865 |
int ret = 0; |
866 |
|
867 |
switch (run->exit_reason) {
|
868 |
case KVM_EXIT_S390_SIEIC:
|
869 |
ret = handle_intercept(cpu); |
870 |
break;
|
871 |
case KVM_EXIT_S390_RESET:
|
872 |
qemu_system_reset_request(); |
873 |
break;
|
874 |
case KVM_EXIT_S390_TSCH:
|
875 |
ret = handle_tsch(cpu); |
876 |
break;
|
877 |
default:
|
878 |
fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
|
879 |
break;
|
880 |
} |
881 |
|
882 |
if (ret == 0) { |
883 |
ret = EXCP_INTERRUPT; |
884 |
} |
885 |
return ret;
|
886 |
} |
887 |
|
888 |
bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
|
889 |
{ |
890 |
return true; |
891 |
} |
892 |
|
893 |
int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
894 |
{ |
895 |
return 1; |
896 |
} |
897 |
|
898 |
int kvm_arch_on_sigbus(int code, void *addr) |
899 |
{ |
900 |
return 1; |
901 |
} |
902 |
|
903 |
void kvm_s390_io_interrupt(S390CPU *cpu, uint16_t subchannel_id,
|
904 |
uint16_t subchannel_nr, uint32_t io_int_parm, |
905 |
uint32_t io_int_word) |
906 |
{ |
907 |
uint32_t type; |
908 |
|
909 |
type = ((subchannel_id & 0xff00) << 24) | |
910 |
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16); |
911 |
kvm_s390_interrupt_internal(cpu, type, |
912 |
((uint32_t)subchannel_id << 16) | subchannel_nr,
|
913 |
((uint64_t)io_int_parm << 32) | io_int_word, 1); |
914 |
} |
915 |
|
916 |
void kvm_s390_crw_mchk(S390CPU *cpu)
|
917 |
{ |
918 |
kvm_s390_interrupt_internal(cpu, KVM_S390_MCHK, 1 << 28, |
919 |
0x00400f1d40330000, 1); |
920 |
} |
921 |
|
922 |
void kvm_s390_enable_css_support(S390CPU *cpu)
|
923 |
{ |
924 |
struct kvm_enable_cap cap = {};
|
925 |
int r;
|
926 |
|
927 |
/* Activate host kernel channel subsystem support. */
|
928 |
cap.cap = KVM_CAP_S390_CSS_SUPPORT; |
929 |
r = kvm_vcpu_ioctl(CPU(cpu), KVM_ENABLE_CAP, &cap); |
930 |
assert(r == 0);
|
931 |
} |
932 |
|
933 |
void kvm_arch_init_irq_routing(KVMState *s)
|
934 |
{ |
935 |
} |
936 |
|
937 |
int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
|
938 |
int vq, bool assign) |
939 |
{ |
940 |
struct kvm_ioeventfd kick = {
|
941 |
.flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY | |
942 |
KVM_IOEVENTFD_FLAG_DATAMATCH, |
943 |
.fd = event_notifier_get_fd(notifier), |
944 |
.datamatch = vq, |
945 |
.addr = sch, |
946 |
.len = 8,
|
947 |
}; |
948 |
if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
|
949 |
return -ENOSYS;
|
950 |
} |
951 |
if (!assign) {
|
952 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
953 |
} |
954 |
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
|
955 |
} |