root / target-s390x / kvm.c @ cb446eca
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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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|
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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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|
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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); |
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if (mem == MAP_FAILED) {
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fprintf(stderr, "Allocating RAM failed\n");
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abort(); |
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} |
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return mem;
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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; |
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} else {
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return legacy_s390_alloc(size);
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} |
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} |
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|
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int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
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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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static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
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|
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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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} |
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return 0; |
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} |
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|
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int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
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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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uint8_t t[4];
|
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static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
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|
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if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) { |
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return -EINVAL;
|
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} else if (memcmp(t, diag_501, 4)) { |
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return -EINVAL;
|
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} else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { |
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return -EINVAL;
|
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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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void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) |
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{
|
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} |
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|
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void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) |
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{
|
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} |
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|
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int kvm_arch_process_async_events(CPUState *cs)
|
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{
|
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return cs->halted;
|
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} |
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|
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void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm, |
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uint64_t parm64, int vm)
|
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{
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CPUState *cs = CPU(cpu); |
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struct kvm_s390_interrupt kvmint;
|
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int r;
|
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|
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if (!cs->kvm_state) {
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return;
|
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} |
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|
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kvmint.type = type; |
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kvmint.parm = parm; |
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kvmint.parm64 = parm64; |
| 404 |
|
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if (vm) {
|
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r = kvm_vm_ioctl(cs->kvm_state, KVM_S390_INTERRUPT, &kvmint); |
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} else {
|
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r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint); |
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} |
| 410 |
|
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if (r < 0) { |
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fprintf(stderr, "KVM failed to inject interrupt\n");
|
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exit(1);
|
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} |
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} |
| 416 |
|
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void kvm_s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token) |
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{
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kvm_s390_interrupt_internal(cpu, KVM_S390_INT_VIRTIO, config_change, |
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token, 1);
|
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} |
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|
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void kvm_s390_interrupt(S390CPU *cpu, int type, uint32_t code) |
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{
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kvm_s390_interrupt_internal(cpu, type, code, 0, 0); |
| 426 |
} |
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|
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static void enter_pgmcheck(S390CPU *cpu, uint16_t code) |
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{
|
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kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code); |
| 431 |
} |
| 432 |
|
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static inline void setcc(S390CPU *cpu, uint64_t cc) |
| 434 |
{
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| 435 |
CPUS390XState *env = &cpu->env; |
| 436 |
CPUState *cs = CPU(cpu); |
| 437 |
|
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cs->kvm_run->psw_mask &= ~(3ull << 44); |
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cs->kvm_run->psw_mask |= (cc & 3) << 44; |
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|
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env->psw.mask &= ~(3ul << 44); |
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env->psw.mask |= (cc & 3) << 44; |
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} |
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|
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static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, |
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uint16_t ipbh0) |
| 447 |
{
|
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CPUS390XState *env = &cpu->env; |
| 449 |
uint32_t sccb; |
| 450 |
uint64_t code; |
| 451 |
int r = 0; |
| 452 |
|
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cpu_synchronize_state(CPU(cpu)); |
| 454 |
sccb = env->regs[ipbh0 & 0xf];
|
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code = env->regs[(ipbh0 & 0xf0) >> 4]; |
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|
| 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(int fd, uint32_t sch, int vq, bool assign) |
| 938 |
{
|
| 939 |
struct kvm_ioeventfd kick = {
|
| 940 |
.flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY | |
| 941 |
KVM_IOEVENTFD_FLAG_DATAMATCH, |
| 942 |
.fd = fd, |
| 943 |
.datamatch = vq, |
| 944 |
.addr = sch, |
| 945 |
.len = 8,
|
| 946 |
}; |
| 947 |
if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
|
| 948 |
return -ENOSYS;
|
| 949 |
} |
| 950 |
if (!assign) {
|
| 951 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
| 952 |
} |
| 953 |
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
|
| 954 |
} |