root / target-s390x / kvm.c @ a0fa2cb8
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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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|
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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_IPL 0x308 |
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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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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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|
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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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|
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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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|
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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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|
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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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} |
317 |
|
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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, ®); |
321 |
if (r < 0) { |
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return r;
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} |
324 |
|
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reg.id = KVM_REG_S390_PFSELECT; |
326 |
reg.addr = (__u64)&(env->pfault_select); |
327 |
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®); |
328 |
if (r < 0) { |
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return r;
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} |
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} |
332 |
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return 0; |
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} |
335 |
|
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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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341 |
* the end of data segment (system break) and this value. We
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342 |
* 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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344 |
* read-only mapping of guest pages.
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*/
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static void *legacy_s390_alloc(size_t size) |
347 |
{ |
348 |
void *mem;
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349 |
|
350 |
mem = mmap((void *) 0x800000000ULL, size, |
351 |
PROT_EXEC|PROT_READ|PROT_WRITE, |
352 |
MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); |
353 |
return mem == MAP_FAILED ? NULL : mem; |
354 |
} |
355 |
|
356 |
int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
357 |
{ |
358 |
static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
359 |
|
360 |
if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) || |
361 |
cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501, 4, 1)) { |
362 |
return -EINVAL;
|
363 |
} |
364 |
return 0; |
365 |
} |
366 |
|
367 |
int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) |
368 |
{ |
369 |
uint8_t t[4];
|
370 |
static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; |
371 |
|
372 |
if (cpu_memory_rw_debug(cs, bp->pc, t, 4, 0)) { |
373 |
return -EINVAL;
|
374 |
} else if (memcmp(t, diag_501, 4)) { |
375 |
return -EINVAL;
|
376 |
} else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { |
377 |
return -EINVAL;
|
378 |
} |
379 |
|
380 |
return 0; |
381 |
} |
382 |
|
383 |
void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) |
384 |
{ |
385 |
} |
386 |
|
387 |
void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) |
388 |
{ |
389 |
} |
390 |
|
391 |
int kvm_arch_process_async_events(CPUState *cs)
|
392 |
{ |
393 |
return cs->halted;
|
394 |
} |
395 |
|
396 |
void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm, |
397 |
uint64_t parm64, int vm)
|
398 |
{ |
399 |
CPUState *cs = CPU(cpu); |
400 |
struct kvm_s390_interrupt kvmint;
|
401 |
int r;
|
402 |
|
403 |
if (!cs->kvm_state) {
|
404 |
return;
|
405 |
} |
406 |
|
407 |
kvmint.type = type; |
408 |
kvmint.parm = parm; |
409 |
kvmint.parm64 = parm64; |
410 |
|
411 |
if (vm) {
|
412 |
r = kvm_vm_ioctl(cs->kvm_state, KVM_S390_INTERRUPT, &kvmint); |
413 |
} else {
|
414 |
r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint); |
415 |
} |
416 |
|
417 |
if (r < 0) { |
418 |
fprintf(stderr, "KVM failed to inject interrupt\n");
|
419 |
exit(1);
|
420 |
} |
421 |
} |
422 |
|
423 |
void kvm_s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token) |
424 |
{ |
425 |
kvm_s390_interrupt_internal(cpu, KVM_S390_INT_VIRTIO, config_change, |
426 |
token, 1);
|
427 |
} |
428 |
|
429 |
void kvm_s390_interrupt(S390CPU *cpu, int type, uint32_t code) |
430 |
{ |
431 |
kvm_s390_interrupt_internal(cpu, type, code, 0, 0); |
432 |
} |
433 |
|
434 |
static void enter_pgmcheck(S390CPU *cpu, uint16_t code) |
435 |
{ |
436 |
kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code); |
437 |
} |
438 |
|
439 |
static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run, |
440 |
uint16_t ipbh0) |
441 |
{ |
442 |
CPUS390XState *env = &cpu->env; |
443 |
uint64_t sccb; |
444 |
uint32_t code; |
445 |
int r = 0; |
446 |
|
447 |
cpu_synchronize_state(CPU(cpu)); |
448 |
if (env->psw.mask & PSW_MASK_PSTATE) {
|
449 |
enter_pgmcheck(cpu, PGM_PRIVILEGED); |
450 |
return 0; |
451 |
} |
452 |
sccb = env->regs[ipbh0 & 0xf];
|
453 |
code = env->regs[(ipbh0 & 0xf0) >> 4]; |
454 |
|
455 |
r = sclp_service_call(sccb, code); |
456 |
if (r < 0) { |
457 |
enter_pgmcheck(cpu, -r); |
458 |
} |
459 |
setcc(cpu, r); |
460 |
|
461 |
return 0; |
462 |
} |
463 |
|
464 |
static int kvm_handle_css_inst(S390CPU *cpu, struct kvm_run *run, |
465 |
uint8_t ipa0, uint8_t ipa1, uint8_t ipb) |
466 |
{ |
467 |
CPUS390XState *env = &cpu->env; |
468 |
|
469 |
if (ipa0 != 0xb2) { |
470 |
/* Not handled for now. */
|
471 |
return -1; |
472 |
} |
473 |
|
474 |
cpu_synchronize_state(CPU(cpu)); |
475 |
|
476 |
switch (ipa1) {
|
477 |
case PRIV_XSCH:
|
478 |
ioinst_handle_xsch(cpu, env->regs[1]);
|
479 |
break;
|
480 |
case PRIV_CSCH:
|
481 |
ioinst_handle_csch(cpu, env->regs[1]);
|
482 |
break;
|
483 |
case PRIV_HSCH:
|
484 |
ioinst_handle_hsch(cpu, env->regs[1]);
|
485 |
break;
|
486 |
case PRIV_MSCH:
|
487 |
ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb);
|
488 |
break;
|
489 |
case PRIV_SSCH:
|
490 |
ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb);
|
491 |
break;
|
492 |
case PRIV_STCRW:
|
493 |
ioinst_handle_stcrw(cpu, run->s390_sieic.ipb); |
494 |
break;
|
495 |
case PRIV_STSCH:
|
496 |
ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb);
|
497 |
break;
|
498 |
case PRIV_TSCH:
|
499 |
/* We should only get tsch via KVM_EXIT_S390_TSCH. */
|
500 |
fprintf(stderr, "Spurious tsch intercept\n");
|
501 |
break;
|
502 |
case PRIV_CHSC:
|
503 |
ioinst_handle_chsc(cpu, run->s390_sieic.ipb); |
504 |
break;
|
505 |
case PRIV_TPI:
|
506 |
/* This should have been handled by kvm already. */
|
507 |
fprintf(stderr, "Spurious tpi intercept\n");
|
508 |
break;
|
509 |
case PRIV_SCHM:
|
510 |
ioinst_handle_schm(cpu, env->regs[1], env->regs[2], |
511 |
run->s390_sieic.ipb); |
512 |
break;
|
513 |
case PRIV_RSCH:
|
514 |
ioinst_handle_rsch(cpu, env->regs[1]);
|
515 |
break;
|
516 |
case PRIV_RCHP:
|
517 |
ioinst_handle_rchp(cpu, env->regs[1]);
|
518 |
break;
|
519 |
case PRIV_STCPS:
|
520 |
/* We do not provide this instruction, it is suppressed. */
|
521 |
break;
|
522 |
case PRIV_SAL:
|
523 |
ioinst_handle_sal(cpu, env->regs[1]);
|
524 |
break;
|
525 |
case PRIV_SIGA:
|
526 |
/* Not provided, set CC = 3 for subchannel not operational */
|
527 |
setcc(cpu, 3);
|
528 |
break;
|
529 |
default:
|
530 |
return -1; |
531 |
} |
532 |
|
533 |
return 0; |
534 |
} |
535 |
|
536 |
static int handle_priv(S390CPU *cpu, struct kvm_run *run, |
537 |
uint8_t ipa0, uint8_t ipa1) |
538 |
{ |
539 |
int r = 0; |
540 |
uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; |
541 |
uint8_t ipb = run->s390_sieic.ipb & 0xff;
|
542 |
|
543 |
DPRINTF("KVM: PRIV: %d\n", ipa1);
|
544 |
switch (ipa1) {
|
545 |
case PRIV_SCLP_CALL:
|
546 |
r = kvm_sclp_service_call(cpu, run, ipbh0); |
547 |
break;
|
548 |
default:
|
549 |
r = kvm_handle_css_inst(cpu, run, ipa0, ipa1, ipb); |
550 |
if (r == -1) { |
551 |
DPRINTF("KVM: unhandled PRIV: 0x%x\n", ipa1);
|
552 |
} |
553 |
break;
|
554 |
} |
555 |
|
556 |
return r;
|
557 |
} |
558 |
|
559 |
static int handle_hypercall(S390CPU *cpu, struct kvm_run *run) |
560 |
{ |
561 |
CPUS390XState *env = &cpu->env; |
562 |
int ret;
|
563 |
|
564 |
cpu_synchronize_state(CPU(cpu)); |
565 |
ret = s390_virtio_hypercall(env); |
566 |
if (ret == -EINVAL) {
|
567 |
enter_pgmcheck(cpu, PGM_SPECIFICATION); |
568 |
return 0; |
569 |
} |
570 |
|
571 |
return ret;
|
572 |
} |
573 |
|
574 |
static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run) |
575 |
{ |
576 |
uint64_t r1, r3; |
577 |
|
578 |
cpu_synchronize_state(CPU(cpu)); |
579 |
r1 = (run->s390_sieic.ipa & 0x00f0) >> 8; |
580 |
r3 = run->s390_sieic.ipa & 0x000f;
|
581 |
handle_diag_308(&cpu->env, r1, r3); |
582 |
} |
583 |
|
584 |
#define DIAG_KVM_CODE_MASK 0x000000000000ffff |
585 |
|
586 |
static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb) |
587 |
{ |
588 |
int r = 0; |
589 |
uint16_t func_code; |
590 |
|
591 |
/*
|
592 |
* For any diagnose call we support, bits 48-63 of the resulting
|
593 |
* address specify the function code; the remainder is ignored.
|
594 |
*/
|
595 |
func_code = decode_basedisp_rs(&cpu->env, ipb) & DIAG_KVM_CODE_MASK; |
596 |
switch (func_code) {
|
597 |
case DIAG_IPL:
|
598 |
kvm_handle_diag_308(cpu, run); |
599 |
break;
|
600 |
case DIAG_KVM_HYPERCALL:
|
601 |
r = handle_hypercall(cpu, run); |
602 |
break;
|
603 |
case DIAG_KVM_BREAKPOINT:
|
604 |
sleep(10);
|
605 |
break;
|
606 |
default:
|
607 |
DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code);
|
608 |
r = -1;
|
609 |
break;
|
610 |
} |
611 |
|
612 |
return r;
|
613 |
} |
614 |
|
615 |
static int kvm_s390_cpu_start(S390CPU *cpu) |
616 |
{ |
617 |
s390_add_running_cpu(cpu); |
618 |
qemu_cpu_kick(CPU(cpu)); |
619 |
DPRINTF("DONE: KVM cpu start: %p\n", &cpu->env);
|
620 |
return 0; |
621 |
} |
622 |
|
623 |
int kvm_s390_cpu_restart(S390CPU *cpu)
|
624 |
{ |
625 |
kvm_s390_interrupt(cpu, KVM_S390_RESTART, 0);
|
626 |
s390_add_running_cpu(cpu); |
627 |
qemu_cpu_kick(CPU(cpu)); |
628 |
DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
|
629 |
return 0; |
630 |
} |
631 |
|
632 |
static int s390_cpu_initial_reset(S390CPU *cpu) |
633 |
{ |
634 |
CPUState *cs = CPU(cpu); |
635 |
CPUS390XState *env = &cpu->env; |
636 |
int i;
|
637 |
|
638 |
s390_del_running_cpu(cpu); |
639 |
if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL) < 0) { |
640 |
perror("cannot init reset vcpu");
|
641 |
} |
642 |
|
643 |
/* Manually zero out all registers */
|
644 |
cpu_synchronize_state(cs); |
645 |
for (i = 0; i < 16; i++) { |
646 |
env->regs[i] = 0;
|
647 |
} |
648 |
|
649 |
DPRINTF("DONE: SIGP initial reset: %p\n", env);
|
650 |
return 0; |
651 |
} |
652 |
|
653 |
#define SIGP_ORDER_MASK 0x000000ff |
654 |
|
655 |
static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) |
656 |
{ |
657 |
CPUS390XState *env = &cpu->env; |
658 |
uint8_t order_code; |
659 |
uint16_t cpu_addr; |
660 |
S390CPU *target_cpu; |
661 |
uint64_t *statusreg = &env->regs[ipa1 >> 4];
|
662 |
int cc;
|
663 |
|
664 |
cpu_synchronize_state(CPU(cpu)); |
665 |
|
666 |
/* get order code */
|
667 |
order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK; |
668 |
|
669 |
cpu_addr = env->regs[ipa1 & 0x0f];
|
670 |
target_cpu = s390_cpu_addr2state(cpu_addr); |
671 |
if (target_cpu == NULL) { |
672 |
cc = 3; /* not operational */ |
673 |
goto out;
|
674 |
} |
675 |
|
676 |
switch (order_code) {
|
677 |
case SIGP_START:
|
678 |
cc = kvm_s390_cpu_start(target_cpu); |
679 |
break;
|
680 |
case SIGP_RESTART:
|
681 |
cc = kvm_s390_cpu_restart(target_cpu); |
682 |
break;
|
683 |
case SIGP_SET_ARCH:
|
684 |
*statusreg &= 0xffffffff00000000UL;
|
685 |
*statusreg |= SIGP_STAT_INVALID_PARAMETER; |
686 |
cc = 1; /* status stored */ |
687 |
break;
|
688 |
case SIGP_INITIAL_CPU_RESET:
|
689 |
cc = s390_cpu_initial_reset(target_cpu); |
690 |
break;
|
691 |
default:
|
692 |
DPRINTF("KVM: unknown SIGP: 0x%x\n", order_code);
|
693 |
*statusreg &= 0xffffffff00000000UL;
|
694 |
*statusreg |= SIGP_STAT_INVALID_ORDER; |
695 |
cc = 1; /* status stored */ |
696 |
break;
|
697 |
} |
698 |
|
699 |
out:
|
700 |
setcc(cpu, cc); |
701 |
return 0; |
702 |
} |
703 |
|
704 |
static void handle_instruction(S390CPU *cpu, struct kvm_run *run) |
705 |
{ |
706 |
unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); |
707 |
uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
|
708 |
int r = -1; |
709 |
|
710 |
DPRINTF("handle_instruction 0x%x 0x%x\n",
|
711 |
run->s390_sieic.ipa, run->s390_sieic.ipb); |
712 |
switch (ipa0) {
|
713 |
case IPA0_B2:
|
714 |
case IPA0_B9:
|
715 |
case IPA0_EB:
|
716 |
r = handle_priv(cpu, run, ipa0 >> 8, ipa1);
|
717 |
break;
|
718 |
case IPA0_DIAG:
|
719 |
r = handle_diag(cpu, run, run->s390_sieic.ipb); |
720 |
break;
|
721 |
case IPA0_SIGP:
|
722 |
r = handle_sigp(cpu, run, ipa1); |
723 |
break;
|
724 |
} |
725 |
|
726 |
if (r < 0) { |
727 |
enter_pgmcheck(cpu, 0x0001);
|
728 |
} |
729 |
} |
730 |
|
731 |
static bool is_special_wait_psw(CPUState *cs) |
732 |
{ |
733 |
/* signal quiesce */
|
734 |
return cs->kvm_run->psw_addr == 0xfffUL; |
735 |
} |
736 |
|
737 |
static int handle_intercept(S390CPU *cpu) |
738 |
{ |
739 |
CPUState *cs = CPU(cpu); |
740 |
struct kvm_run *run = cs->kvm_run;
|
741 |
int icpt_code = run->s390_sieic.icptcode;
|
742 |
int r = 0; |
743 |
|
744 |
DPRINTF("intercept: 0x%x (at 0x%lx)\n", icpt_code,
|
745 |
(long)cs->kvm_run->psw_addr);
|
746 |
switch (icpt_code) {
|
747 |
case ICPT_INSTRUCTION:
|
748 |
handle_instruction(cpu, run); |
749 |
break;
|
750 |
case ICPT_WAITPSW:
|
751 |
/* disabled wait, since enabled wait is handled in kernel */
|
752 |
if (s390_del_running_cpu(cpu) == 0) { |
753 |
if (is_special_wait_psw(cs)) {
|
754 |
qemu_system_shutdown_request(); |
755 |
} else {
|
756 |
QObject *data; |
757 |
|
758 |
data = qobject_from_jsonf("{ 'action': %s }", "pause"); |
759 |
monitor_protocol_event(QEVENT_GUEST_PANICKED, data); |
760 |
qobject_decref(data); |
761 |
vm_stop(RUN_STATE_GUEST_PANICKED); |
762 |
} |
763 |
} |
764 |
r = EXCP_HALTED; |
765 |
break;
|
766 |
case ICPT_CPU_STOP:
|
767 |
if (s390_del_running_cpu(cpu) == 0) { |
768 |
qemu_system_shutdown_request(); |
769 |
} |
770 |
r = EXCP_HALTED; |
771 |
break;
|
772 |
case ICPT_SOFT_INTERCEPT:
|
773 |
fprintf(stderr, "KVM unimplemented icpt SOFT\n");
|
774 |
exit(1);
|
775 |
break;
|
776 |
case ICPT_IO:
|
777 |
fprintf(stderr, "KVM unimplemented icpt IO\n");
|
778 |
exit(1);
|
779 |
break;
|
780 |
default:
|
781 |
fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
|
782 |
exit(1);
|
783 |
break;
|
784 |
} |
785 |
|
786 |
return r;
|
787 |
} |
788 |
|
789 |
static int handle_tsch(S390CPU *cpu) |
790 |
{ |
791 |
CPUS390XState *env = &cpu->env; |
792 |
CPUState *cs = CPU(cpu); |
793 |
struct kvm_run *run = cs->kvm_run;
|
794 |
int ret;
|
795 |
|
796 |
cpu_synchronize_state(cs); |
797 |
|
798 |
ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb);
|
799 |
if (ret >= 0) { |
800 |
/* Success; set condition code. */
|
801 |
setcc(cpu, ret); |
802 |
ret = 0;
|
803 |
} else if (ret < -1) { |
804 |
/*
|
805 |
* Failure.
|
806 |
* If an I/O interrupt had been dequeued, we have to reinject it.
|
807 |
*/
|
808 |
if (run->s390_tsch.dequeued) {
|
809 |
uint16_t subchannel_id = run->s390_tsch.subchannel_id; |
810 |
uint16_t subchannel_nr = run->s390_tsch.subchannel_nr; |
811 |
uint32_t io_int_parm = run->s390_tsch.io_int_parm; |
812 |
uint32_t io_int_word = run->s390_tsch.io_int_word; |
813 |
uint32_t type = ((subchannel_id & 0xff00) << 24) | |
814 |
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16); |
815 |
|
816 |
kvm_s390_interrupt_internal(cpu, type, |
817 |
((uint32_t)subchannel_id << 16)
|
818 |
| subchannel_nr, |
819 |
((uint64_t)io_int_parm << 32)
|
820 |
| io_int_word, 1);
|
821 |
} |
822 |
ret = 0;
|
823 |
} |
824 |
return ret;
|
825 |
} |
826 |
|
827 |
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) |
828 |
{ |
829 |
S390CPU *cpu = S390_CPU(cs); |
830 |
int ret = 0; |
831 |
|
832 |
switch (run->exit_reason) {
|
833 |
case KVM_EXIT_S390_SIEIC:
|
834 |
ret = handle_intercept(cpu); |
835 |
break;
|
836 |
case KVM_EXIT_S390_RESET:
|
837 |
qemu_system_reset_request(); |
838 |
break;
|
839 |
case KVM_EXIT_S390_TSCH:
|
840 |
ret = handle_tsch(cpu); |
841 |
break;
|
842 |
default:
|
843 |
fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
|
844 |
break;
|
845 |
} |
846 |
|
847 |
if (ret == 0) { |
848 |
ret = EXCP_INTERRUPT; |
849 |
} |
850 |
return ret;
|
851 |
} |
852 |
|
853 |
bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
|
854 |
{ |
855 |
return true; |
856 |
} |
857 |
|
858 |
int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
859 |
{ |
860 |
return 1; |
861 |
} |
862 |
|
863 |
int kvm_arch_on_sigbus(int code, void *addr) |
864 |
{ |
865 |
return 1; |
866 |
} |
867 |
|
868 |
void kvm_s390_io_interrupt(S390CPU *cpu, uint16_t subchannel_id,
|
869 |
uint16_t subchannel_nr, uint32_t io_int_parm, |
870 |
uint32_t io_int_word) |
871 |
{ |
872 |
uint32_t type; |
873 |
|
874 |
type = ((subchannel_id & 0xff00) << 24) | |
875 |
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16); |
876 |
kvm_s390_interrupt_internal(cpu, type, |
877 |
((uint32_t)subchannel_id << 16) | subchannel_nr,
|
878 |
((uint64_t)io_int_parm << 32) | io_int_word, 1); |
879 |
} |
880 |
|
881 |
void kvm_s390_crw_mchk(S390CPU *cpu)
|
882 |
{ |
883 |
kvm_s390_interrupt_internal(cpu, KVM_S390_MCHK, 1 << 28, |
884 |
0x00400f1d40330000, 1); |
885 |
} |
886 |
|
887 |
void kvm_s390_enable_css_support(S390CPU *cpu)
|
888 |
{ |
889 |
struct kvm_enable_cap cap = {};
|
890 |
int r;
|
891 |
|
892 |
/* Activate host kernel channel subsystem support. */
|
893 |
cap.cap = KVM_CAP_S390_CSS_SUPPORT; |
894 |
r = kvm_vcpu_ioctl(CPU(cpu), KVM_ENABLE_CAP, &cap); |
895 |
assert(r == 0);
|
896 |
} |
897 |
|
898 |
void kvm_arch_init_irq_routing(KVMState *s)
|
899 |
{ |
900 |
} |
901 |
|
902 |
int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
|
903 |
int vq, bool assign) |
904 |
{ |
905 |
struct kvm_ioeventfd kick = {
|
906 |
.flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY | |
907 |
KVM_IOEVENTFD_FLAG_DATAMATCH, |
908 |
.fd = event_notifier_get_fd(notifier), |
909 |
.datamatch = vq, |
910 |
.addr = sch, |
911 |
.len = 8,
|
912 |
}; |
913 |
if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
|
914 |
return -ENOSYS;
|
915 |
} |
916 |
if (!assign) {
|
917 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
918 |
} |
919 |
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
|
920 |
} |