Remove the need for a cpu to inject a floating interrupt on kvm. Acked-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
1272 lines
34 KiB
C
1272 lines
34 KiB
C
/*
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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 "hw/hw.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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#include "exec/gdbstub.h"
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#include "trace.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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#define PRIV_B2_SCLP_CALL 0x20
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#define PRIV_B2_CSCH 0x30
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#define PRIV_B2_HSCH 0x31
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#define PRIV_B2_MSCH 0x32
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#define PRIV_B2_SSCH 0x33
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#define PRIV_B2_STSCH 0x34
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#define PRIV_B2_TSCH 0x35
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#define PRIV_B2_TPI 0x36
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#define PRIV_B2_SAL 0x37
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#define PRIV_B2_RSCH 0x38
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#define PRIV_B2_STCRW 0x39
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#define PRIV_B2_STCPS 0x3a
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#define PRIV_B2_RCHP 0x3b
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#define PRIV_B2_SCHM 0x3c
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#define PRIV_B2_CHSC 0x5f
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#define PRIV_B2_SIGA 0x74
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#define PRIV_B2_XSCH 0x76
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#define PRIV_EB_SQBS 0x8a
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#define PRIV_B9_EQBS 0x9c
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#define DIAG_IPL 0x308
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#define DIAG_KVM_HYPERCALL 0x500
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#define DIAG_KVM_BREAKPOINT 0x501
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#define ICPT_INSTRUCTION 0x04
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#define ICPT_PROGRAM 0x08
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#define ICPT_EXT_INT 0x14
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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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static CPUWatchpoint hw_watchpoint;
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/*
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* We don't use a list because this structure is also used to transmit the
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* hardware breakpoints to the kernel.
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*/
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static struct kvm_hw_breakpoint *hw_breakpoints;
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static int nb_hw_breakpoints;
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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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static int kvm_s390_check_clear_cmma(KVMState *s)
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{
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_CLR_CMMA,
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};
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return kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attr);
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}
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static int kvm_s390_check_enable_cmma(KVMState *s)
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{
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_ENABLE_CMMA,
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};
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return kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attr);
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}
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void kvm_s390_clear_cmma_callback(void *opaque)
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{
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int rc;
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KVMState *s = opaque;
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_CLR_CMMA,
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};
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rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
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trace_kvm_clear_cmma(rc);
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}
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static void kvm_s390_enable_cmma(KVMState *s)
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{
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int rc;
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MEM_CTRL,
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.attr = KVM_S390_VM_MEM_ENABLE_CMMA,
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};
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if (kvm_s390_check_enable_cmma(s) || kvm_s390_check_clear_cmma(s)) {
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return;
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}
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rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
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if (!rc) {
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qemu_register_reset(kvm_s390_clear_cmma_callback, s);
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}
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trace_kvm_enable_cmma(rc);
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}
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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_VM_ATTRIBUTES)) {
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kvm_s390_enable_cmma(s);
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}
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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_s390_reset_vcpu(S390CPU *cpu)
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{
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CPUState *cs = CPU(cpu);
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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(cs, 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_sregs sregs;
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struct kvm_regs regs;
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int r;
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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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r = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
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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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/* 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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/*
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* These ONE_REGS are not protected by a capability. As they are only
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* necessary for migration we just trace a possible error, but don't
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* return with an error return code.
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*/
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kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
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kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
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kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
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kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
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kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp);
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if (cap_async_pf) {
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r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
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if (r < 0) {
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return r;
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}
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r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
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if (r < 0) {
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return r;
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}
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r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
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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_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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r = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs);
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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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/* 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_sregs sregs;
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struct kvm_regs regs;
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int i, r;
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/* get the PSW */
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env->psw.addr = cs->kvm_run->psw_addr;
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env->psw.mask = cs->kvm_run->psw_mask;
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/* the GPRS */
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if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_GPRS) {
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for (i = 0; i < 16; i++) {
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env->regs[i] = cs->kvm_run->s.regs.gprs[i];
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}
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} else {
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r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s);
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if (r < 0) {
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return r;
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}
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for (i = 0; i < 16; i++) {
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env->regs[i] = regs.gprs[i];
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}
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}
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/* The ACRS and CRS */
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if (cap_sync_regs &&
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cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS &&
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cs->kvm_run->kvm_valid_regs & KVM_SYNC_CRS) {
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for (i = 0; i < 16; i++) {
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env->aregs[i] = cs->kvm_run->s.regs.acrs[i];
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env->cregs[i] = cs->kvm_run->s.regs.crs[i];
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}
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} else {
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r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs);
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if (r < 0) {
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return r;
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}
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for (i = 0; i < 16; i++) {
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env->aregs[i] = sregs.acrs[i];
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env->cregs[i] = sregs.crs[i];
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}
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}
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/* The prefix */
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if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
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env->psa = cs->kvm_run->s.regs.prefix;
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}
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/*
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* These ONE_REGS are not protected by a capability. As they are only
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* necessary for migration we just trace a possible error, but don't
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* return with an error return code.
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*/
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kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
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kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
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kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
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kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
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kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp);
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if (cap_async_pf) {
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r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
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if (r < 0) {
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return r;
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}
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r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
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if (r < 0) {
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return r;
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}
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r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
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if (r < 0) {
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return r;
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}
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}
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return 0;
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}
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/*
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* Legacy layout for s390:
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* Older S390 KVM requires the topmost vma of the RAM to be
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* smaller than an system defined value, which is at least 256GB.
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* Larger systems have larger values. We put the guest between
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* the end of data segment (system break) and this value. We
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* use 32GB as a base to have enough room for the system break
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* to grow. We also have to use MAP parameters that avoid
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* read-only mapping of guest pages.
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*/
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static void *legacy_s390_alloc(size_t size)
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{
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void *mem;
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mem = mmap((void *) 0x800000000ULL, size,
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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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return mem == MAP_FAILED ? NULL : mem;
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}
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/* DIAG 501 is used for sw breakpoints */
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static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
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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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if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
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sizeof(diag_501), 0) ||
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cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501,
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sizeof(diag_501), 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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int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
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{
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uint8_t t[sizeof(diag_501)];
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if (cpu_memory_rw_debug(cs, bp->pc, t, sizeof(diag_501), 0)) {
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return -EINVAL;
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} else if (memcmp(t, diag_501, sizeof(diag_501))) {
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return -EINVAL;
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} else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
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sizeof(diag_501), 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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static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr,
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int len, int type)
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{
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int n;
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for (n = 0; n < nb_hw_breakpoints; n++) {
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if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type &&
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(hw_breakpoints[n].len == len || len == -1)) {
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return &hw_breakpoints[n];
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}
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}
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return NULL;
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}
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static int insert_hw_breakpoint(target_ulong addr, int len, int type)
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{
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int size;
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if (find_hw_breakpoint(addr, len, type)) {
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return -EEXIST;
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}
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size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint);
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if (!hw_breakpoints) {
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nb_hw_breakpoints = 0;
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hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size);
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} else {
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hw_breakpoints =
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(struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size);
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}
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if (!hw_breakpoints) {
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nb_hw_breakpoints = 0;
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return -ENOMEM;
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}
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hw_breakpoints[nb_hw_breakpoints].addr = addr;
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hw_breakpoints[nb_hw_breakpoints].len = len;
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hw_breakpoints[nb_hw_breakpoints].type = type;
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nb_hw_breakpoints++;
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return 0;
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}
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|
|
|
int kvm_arch_insert_hw_breakpoint(target_ulong addr,
|
|
target_ulong len, int type)
|
|
{
|
|
switch (type) {
|
|
case GDB_BREAKPOINT_HW:
|
|
type = KVM_HW_BP;
|
|
break;
|
|
case GDB_WATCHPOINT_WRITE:
|
|
if (len < 1) {
|
|
return -EINVAL;
|
|
}
|
|
type = KVM_HW_WP_WRITE;
|
|
break;
|
|
default:
|
|
return -ENOSYS;
|
|
}
|
|
return insert_hw_breakpoint(addr, len, type);
|
|
}
|
|
|
|
int kvm_arch_remove_hw_breakpoint(target_ulong addr,
|
|
target_ulong len, int type)
|
|
{
|
|
int size;
|
|
struct kvm_hw_breakpoint *bp = find_hw_breakpoint(addr, len, type);
|
|
|
|
if (bp == NULL) {
|
|
return -ENOENT;
|
|
}
|
|
|
|
nb_hw_breakpoints--;
|
|
if (nb_hw_breakpoints > 0) {
|
|
/*
|
|
* In order to trim the array, move the last element to the position to
|
|
* be removed - if necessary.
|
|
*/
|
|
if (bp != &hw_breakpoints[nb_hw_breakpoints]) {
|
|
*bp = hw_breakpoints[nb_hw_breakpoints];
|
|
}
|
|
size = nb_hw_breakpoints * sizeof(struct kvm_hw_breakpoint);
|
|
hw_breakpoints =
|
|
(struct kvm_hw_breakpoint *)g_realloc(hw_breakpoints, size);
|
|
} else {
|
|
g_free(hw_breakpoints);
|
|
hw_breakpoints = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_remove_all_hw_breakpoints(void)
|
|
{
|
|
nb_hw_breakpoints = 0;
|
|
g_free(hw_breakpoints);
|
|
hw_breakpoints = NULL;
|
|
}
|
|
|
|
void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg)
|
|
{
|
|
int i;
|
|
|
|
if (nb_hw_breakpoints > 0) {
|
|
dbg->arch.nr_hw_bp = nb_hw_breakpoints;
|
|
dbg->arch.hw_bp = hw_breakpoints;
|
|
|
|
for (i = 0; i < nb_hw_breakpoints; ++i) {
|
|
hw_breakpoints[i].phys_addr = s390_cpu_get_phys_addr_debug(cpu,
|
|
hw_breakpoints[i].addr);
|
|
}
|
|
dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
|
|
} else {
|
|
dbg->arch.nr_hw_bp = 0;
|
|
dbg->arch.hw_bp = NULL;
|
|
}
|
|
}
|
|
|
|
void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run)
|
|
{
|
|
}
|
|
|
|
void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
|
|
{
|
|
}
|
|
|
|
int kvm_arch_process_async_events(CPUState *cs)
|
|
{
|
|
return cs->halted;
|
|
}
|
|
|
|
static int s390_kvm_irq_to_interrupt(struct kvm_s390_irq *irq,
|
|
struct kvm_s390_interrupt *interrupt)
|
|
{
|
|
int r = 0;
|
|
|
|
interrupt->type = irq->type;
|
|
switch (irq->type) {
|
|
case KVM_S390_INT_VIRTIO:
|
|
interrupt->parm = irq->u.ext.ext_params;
|
|
/* fall through */
|
|
case KVM_S390_INT_PFAULT_INIT:
|
|
case KVM_S390_INT_PFAULT_DONE:
|
|
interrupt->parm64 = irq->u.ext.ext_params2;
|
|
break;
|
|
case KVM_S390_PROGRAM_INT:
|
|
interrupt->parm = irq->u.pgm.code;
|
|
break;
|
|
case KVM_S390_SIGP_SET_PREFIX:
|
|
interrupt->parm = irq->u.prefix.address;
|
|
break;
|
|
case KVM_S390_INT_SERVICE:
|
|
interrupt->parm = irq->u.ext.ext_params;
|
|
break;
|
|
case KVM_S390_MCHK:
|
|
interrupt->parm = irq->u.mchk.cr14;
|
|
interrupt->parm64 = irq->u.mchk.mcic;
|
|
break;
|
|
case KVM_S390_INT_EXTERNAL_CALL:
|
|
interrupt->parm = irq->u.extcall.code;
|
|
break;
|
|
case KVM_S390_INT_EMERGENCY:
|
|
interrupt->parm = irq->u.emerg.code;
|
|
break;
|
|
case KVM_S390_SIGP_STOP:
|
|
case KVM_S390_RESTART:
|
|
break; /* These types have no parameters */
|
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
|
|
interrupt->parm = irq->u.io.subchannel_id << 16;
|
|
interrupt->parm |= irq->u.io.subchannel_nr;
|
|
interrupt->parm64 = (uint64_t)irq->u.io.io_int_parm << 32;
|
|
interrupt->parm64 |= irq->u.io.io_int_word;
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_interrupt kvmint = {};
|
|
CPUState *cs = CPU(cpu);
|
|
int r;
|
|
|
|
r = s390_kvm_irq_to_interrupt(irq, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "%s called with bogus interrupt\n", __func__);
|
|
exit(1);
|
|
}
|
|
|
|
r = kvm_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "KVM failed to inject interrupt\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
|
|
{
|
|
struct kvm_s390_interrupt kvmint = {};
|
|
int r;
|
|
|
|
r = s390_kvm_irq_to_interrupt(irq, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "%s called with bogus interrupt\n", __func__);
|
|
exit(1);
|
|
}
|
|
|
|
r = kvm_vm_ioctl(kvm_state, KVM_S390_INTERRUPT, &kvmint);
|
|
if (r < 0) {
|
|
fprintf(stderr, "KVM failed to inject interrupt\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
void kvm_s390_virtio_irq(int config_change, uint64_t token)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_INT_VIRTIO,
|
|
.u.ext.ext_params = config_change,
|
|
.u.ext.ext_params2 = token,
|
|
};
|
|
|
|
kvm_s390_floating_interrupt(&irq);
|
|
}
|
|
|
|
void kvm_s390_service_interrupt(uint32_t parm)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_INT_SERVICE,
|
|
.u.ext.ext_params = parm,
|
|
};
|
|
|
|
kvm_s390_floating_interrupt(&irq);
|
|
}
|
|
|
|
static void enter_pgmcheck(S390CPU *cpu, uint16_t code)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_PROGRAM_INT,
|
|
.u.pgm.code = code,
|
|
};
|
|
|
|
kvm_s390_vcpu_interrupt(cpu, &irq);
|
|
}
|
|
|
|
static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
|
|
uint16_t ipbh0)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
uint64_t sccb;
|
|
uint32_t code;
|
|
int r = 0;
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
sccb = env->regs[ipbh0 & 0xf];
|
|
code = env->regs[(ipbh0 & 0xf0) >> 4];
|
|
|
|
r = sclp_service_call(env, sccb, code);
|
|
if (r < 0) {
|
|
enter_pgmcheck(cpu, -r);
|
|
} else {
|
|
setcc(cpu, r);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
int rc = 0;
|
|
uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
|
|
switch (ipa1) {
|
|
case PRIV_B2_XSCH:
|
|
ioinst_handle_xsch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_B2_CSCH:
|
|
ioinst_handle_csch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_B2_HSCH:
|
|
ioinst_handle_hsch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_B2_MSCH:
|
|
ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_B2_SSCH:
|
|
ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_B2_STCRW:
|
|
ioinst_handle_stcrw(cpu, run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_B2_STSCH:
|
|
ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_B2_TSCH:
|
|
/* We should only get tsch via KVM_EXIT_S390_TSCH. */
|
|
fprintf(stderr, "Spurious tsch intercept\n");
|
|
break;
|
|
case PRIV_B2_CHSC:
|
|
ioinst_handle_chsc(cpu, run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_B2_TPI:
|
|
/* This should have been handled by kvm already. */
|
|
fprintf(stderr, "Spurious tpi intercept\n");
|
|
break;
|
|
case PRIV_B2_SCHM:
|
|
ioinst_handle_schm(cpu, env->regs[1], env->regs[2],
|
|
run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_B2_RSCH:
|
|
ioinst_handle_rsch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_B2_RCHP:
|
|
ioinst_handle_rchp(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_B2_STCPS:
|
|
/* We do not provide this instruction, it is suppressed. */
|
|
break;
|
|
case PRIV_B2_SAL:
|
|
ioinst_handle_sal(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_B2_SIGA:
|
|
/* Not provided, set CC = 3 for subchannel not operational */
|
|
setcc(cpu, 3);
|
|
break;
|
|
case PRIV_B2_SCLP_CALL:
|
|
rc = kvm_sclp_service_call(cpu, run, ipbh0);
|
|
break;
|
|
default:
|
|
rc = -1;
|
|
DPRINTF("KVM: unhandled PRIV: 0xb2%x\n", ipa1);
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
|
|
{
|
|
int r = 0;
|
|
|
|
switch (ipa1) {
|
|
case PRIV_B9_EQBS:
|
|
/* just inject exception */
|
|
r = -1;
|
|
break;
|
|
default:
|
|
r = -1;
|
|
DPRINTF("KVM: unhandled PRIV: 0xb9%x\n", ipa1);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
|
|
{
|
|
int r = 0;
|
|
|
|
switch (ipa1) {
|
|
case PRIV_EB_SQBS:
|
|
/* just inject exception */
|
|
r = -1;
|
|
break;
|
|
default:
|
|
r = -1;
|
|
DPRINTF("KVM: unhandled PRIV: 0xeb%x\n", ipa1);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int handle_hypercall(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
int ret;
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
ret = s390_virtio_hypercall(env);
|
|
if (ret == -EINVAL) {
|
|
enter_pgmcheck(cpu, PGM_SPECIFICATION);
|
|
return 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
uint64_t r1, r3;
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
r1 = (run->s390_sieic.ipa & 0x00f0) >> 8;
|
|
r3 = run->s390_sieic.ipa & 0x000f;
|
|
handle_diag_308(&cpu->env, r1, r3);
|
|
}
|
|
|
|
static int handle_sw_breakpoint(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
unsigned long pc;
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
|
|
pc = env->psw.addr - 4;
|
|
if (kvm_find_sw_breakpoint(CPU(cpu), pc)) {
|
|
env->psw.addr = pc;
|
|
return EXCP_DEBUG;
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
#define DIAG_KVM_CODE_MASK 0x000000000000ffff
|
|
|
|
static int handle_diag(S390CPU *cpu, struct kvm_run *run, uint32_t ipb)
|
|
{
|
|
int r = 0;
|
|
uint16_t func_code;
|
|
|
|
/*
|
|
* For any diagnose call we support, bits 48-63 of the resulting
|
|
* address specify the function code; the remainder is ignored.
|
|
*/
|
|
func_code = decode_basedisp_rs(&cpu->env, ipb) & DIAG_KVM_CODE_MASK;
|
|
switch (func_code) {
|
|
case DIAG_IPL:
|
|
kvm_handle_diag_308(cpu, run);
|
|
break;
|
|
case DIAG_KVM_HYPERCALL:
|
|
r = handle_hypercall(cpu, run);
|
|
break;
|
|
case DIAG_KVM_BREAKPOINT:
|
|
r = handle_sw_breakpoint(cpu, run);
|
|
break;
|
|
default:
|
|
DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code);
|
|
r = -1;
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int kvm_s390_cpu_start(S390CPU *cpu)
|
|
{
|
|
s390_add_running_cpu(cpu);
|
|
qemu_cpu_kick(CPU(cpu));
|
|
DPRINTF("DONE: KVM cpu start: %p\n", &cpu->env);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_cpu_restart(S390CPU *cpu)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_RESTART,
|
|
};
|
|
|
|
kvm_s390_vcpu_interrupt(cpu, &irq);
|
|
s390_add_running_cpu(cpu);
|
|
qemu_cpu_kick(CPU(cpu));
|
|
DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
|
|
return 0;
|
|
}
|
|
|
|
static void sigp_initial_cpu_reset(void *arg)
|
|
{
|
|
CPUState *cpu = arg;
|
|
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
|
|
|
|
cpu_synchronize_state(cpu);
|
|
scc->initial_cpu_reset(cpu);
|
|
}
|
|
|
|
static void sigp_cpu_reset(void *arg)
|
|
{
|
|
CPUState *cpu = arg;
|
|
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
|
|
|
|
cpu_synchronize_state(cpu);
|
|
scc->cpu_reset(cpu);
|
|
}
|
|
|
|
#define SIGP_ORDER_MASK 0x000000ff
|
|
|
|
static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
uint8_t order_code;
|
|
uint16_t cpu_addr;
|
|
S390CPU *target_cpu;
|
|
uint64_t *statusreg = &env->regs[ipa1 >> 4];
|
|
int cc;
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
|
|
/* get order code */
|
|
order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK;
|
|
|
|
cpu_addr = env->regs[ipa1 & 0x0f];
|
|
target_cpu = s390_cpu_addr2state(cpu_addr);
|
|
if (target_cpu == NULL) {
|
|
cc = 3; /* not operational */
|
|
goto out;
|
|
}
|
|
|
|
switch (order_code) {
|
|
case SIGP_START:
|
|
cc = kvm_s390_cpu_start(target_cpu);
|
|
break;
|
|
case SIGP_RESTART:
|
|
cc = kvm_s390_cpu_restart(target_cpu);
|
|
break;
|
|
case SIGP_SET_ARCH:
|
|
*statusreg &= 0xffffffff00000000UL;
|
|
*statusreg |= SIGP_STAT_INVALID_PARAMETER;
|
|
cc = 1; /* status stored */
|
|
break;
|
|
case SIGP_INITIAL_CPU_RESET:
|
|
run_on_cpu(CPU(target_cpu), sigp_initial_cpu_reset, CPU(target_cpu));
|
|
cc = 0;
|
|
break;
|
|
case SIGP_CPU_RESET:
|
|
run_on_cpu(CPU(target_cpu), sigp_cpu_reset, CPU(target_cpu));
|
|
cc = 0;
|
|
break;
|
|
default:
|
|
DPRINTF("KVM: unknown SIGP: 0x%x\n", order_code);
|
|
*statusreg &= 0xffffffff00000000UL;
|
|
*statusreg |= SIGP_STAT_INVALID_ORDER;
|
|
cc = 1; /* status stored */
|
|
break;
|
|
}
|
|
|
|
out:
|
|
setcc(cpu, cc);
|
|
return 0;
|
|
}
|
|
|
|
static int handle_instruction(S390CPU *cpu, struct kvm_run *run)
|
|
{
|
|
unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
|
|
uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
|
|
int r = -1;
|
|
|
|
DPRINTF("handle_instruction 0x%x 0x%x\n",
|
|
run->s390_sieic.ipa, run->s390_sieic.ipb);
|
|
switch (ipa0) {
|
|
case IPA0_B2:
|
|
r = handle_b2(cpu, run, ipa1);
|
|
break;
|
|
case IPA0_B9:
|
|
r = handle_b9(cpu, run, ipa1);
|
|
break;
|
|
case IPA0_EB:
|
|
r = handle_eb(cpu, run, ipa1);
|
|
break;
|
|
case IPA0_DIAG:
|
|
r = handle_diag(cpu, run, run->s390_sieic.ipb);
|
|
break;
|
|
case IPA0_SIGP:
|
|
r = handle_sigp(cpu, run, ipa1);
|
|
break;
|
|
}
|
|
|
|
if (r < 0) {
|
|
r = 0;
|
|
enter_pgmcheck(cpu, 0x0001);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static bool is_special_wait_psw(CPUState *cs)
|
|
{
|
|
/* signal quiesce */
|
|
return cs->kvm_run->psw_addr == 0xfffUL;
|
|
}
|
|
|
|
static void guest_panicked(void)
|
|
{
|
|
QObject *data;
|
|
|
|
data = qobject_from_jsonf("{ 'action': %s }", "pause");
|
|
monitor_protocol_event(QEVENT_GUEST_PANICKED, data);
|
|
qobject_decref(data);
|
|
|
|
vm_stop(RUN_STATE_GUEST_PANICKED);
|
|
}
|
|
|
|
static void unmanageable_intercept(S390CPU *cpu, const char *str, int pswoffset)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
|
|
error_report("Unmanageable %s! CPU%i new PSW: 0x%016lx:%016lx",
|
|
str, cs->cpu_index, ldq_phys(cs->as, cpu->env.psa + pswoffset),
|
|
ldq_phys(cs->as, cpu->env.psa + pswoffset + 8));
|
|
s390_del_running_cpu(cpu);
|
|
guest_panicked();
|
|
}
|
|
|
|
static int handle_intercept(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_run *run = cs->kvm_run;
|
|
int icpt_code = run->s390_sieic.icptcode;
|
|
int r = 0;
|
|
|
|
DPRINTF("intercept: 0x%x (at 0x%lx)\n", icpt_code,
|
|
(long)cs->kvm_run->psw_addr);
|
|
switch (icpt_code) {
|
|
case ICPT_INSTRUCTION:
|
|
r = handle_instruction(cpu, run);
|
|
break;
|
|
case ICPT_PROGRAM:
|
|
unmanageable_intercept(cpu, "program interrupt",
|
|
offsetof(LowCore, program_new_psw));
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_EXT_INT:
|
|
unmanageable_intercept(cpu, "external interrupt",
|
|
offsetof(LowCore, external_new_psw));
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_WAITPSW:
|
|
/* disabled wait, since enabled wait is handled in kernel */
|
|
if (s390_del_running_cpu(cpu) == 0) {
|
|
if (is_special_wait_psw(cs)) {
|
|
qemu_system_shutdown_request();
|
|
} else {
|
|
guest_panicked();
|
|
}
|
|
}
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_CPU_STOP:
|
|
if (s390_del_running_cpu(cpu) == 0) {
|
|
qemu_system_shutdown_request();
|
|
}
|
|
r = EXCP_HALTED;
|
|
break;
|
|
case ICPT_SOFT_INTERCEPT:
|
|
fprintf(stderr, "KVM unimplemented icpt SOFT\n");
|
|
exit(1);
|
|
break;
|
|
case ICPT_IO:
|
|
fprintf(stderr, "KVM unimplemented icpt IO\n");
|
|
exit(1);
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
|
|
exit(1);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int handle_tsch(S390CPU *cpu)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_run *run = cs->kvm_run;
|
|
int ret;
|
|
|
|
cpu_synchronize_state(cs);
|
|
|
|
ret = ioinst_handle_tsch(env, env->regs[1], run->s390_tsch.ipb);
|
|
if (ret >= 0) {
|
|
/* Success; set condition code. */
|
|
setcc(cpu, ret);
|
|
ret = 0;
|
|
} else if (ret < -1) {
|
|
/*
|
|
* Failure.
|
|
* If an I/O interrupt had been dequeued, we have to reinject it.
|
|
*/
|
|
if (run->s390_tsch.dequeued) {
|
|
kvm_s390_io_interrupt(run->s390_tsch.subchannel_id,
|
|
run->s390_tsch.subchannel_nr,
|
|
run->s390_tsch.io_int_parm,
|
|
run->s390_tsch.io_int_word);
|
|
}
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int kvm_arch_handle_debug_exit(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_run *run = cs->kvm_run;
|
|
|
|
int ret = 0;
|
|
struct kvm_debug_exit_arch *arch_info = &run->debug.arch;
|
|
|
|
switch (arch_info->type) {
|
|
case KVM_HW_WP_WRITE:
|
|
if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
|
|
cs->watchpoint_hit = &hw_watchpoint;
|
|
hw_watchpoint.vaddr = arch_info->addr;
|
|
hw_watchpoint.flags = BP_MEM_WRITE;
|
|
ret = EXCP_DEBUG;
|
|
}
|
|
break;
|
|
case KVM_HW_BP:
|
|
if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) {
|
|
ret = EXCP_DEBUG;
|
|
}
|
|
break;
|
|
case KVM_SINGLESTEP:
|
|
if (cs->singlestep_enabled) {
|
|
ret = EXCP_DEBUG;
|
|
}
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
|
|
{
|
|
S390CPU *cpu = S390_CPU(cs);
|
|
int ret = 0;
|
|
|
|
switch (run->exit_reason) {
|
|
case KVM_EXIT_S390_SIEIC:
|
|
ret = handle_intercept(cpu);
|
|
break;
|
|
case KVM_EXIT_S390_RESET:
|
|
qemu_system_reset_request();
|
|
break;
|
|
case KVM_EXIT_S390_TSCH:
|
|
ret = handle_tsch(cpu);
|
|
break;
|
|
case KVM_EXIT_DEBUG:
|
|
ret = kvm_arch_handle_debug_exit(cpu);
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
|
|
break;
|
|
}
|
|
|
|
if (ret == 0) {
|
|
ret = EXCP_INTERRUPT;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int kvm_arch_on_sigbus(int code, void *addr)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
void kvm_s390_io_interrupt(uint16_t subchannel_id,
|
|
uint16_t subchannel_nr, uint32_t io_int_parm,
|
|
uint32_t io_int_word)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.u.io.subchannel_id = subchannel_id,
|
|
.u.io.subchannel_nr = subchannel_nr,
|
|
.u.io.io_int_parm = io_int_parm,
|
|
.u.io.io_int_word = io_int_word,
|
|
};
|
|
|
|
if (io_int_word & IO_INT_WORD_AI) {
|
|
irq.type = KVM_S390_INT_IO(1, 0, 0, 0);
|
|
} else {
|
|
irq.type = ((subchannel_id & 0xff00) << 24) |
|
|
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
|
|
}
|
|
kvm_s390_floating_interrupt(&irq);
|
|
}
|
|
|
|
void kvm_s390_crw_mchk(void)
|
|
{
|
|
struct kvm_s390_irq irq = {
|
|
.type = KVM_S390_MCHK,
|
|
.u.mchk.cr14 = 1 << 28,
|
|
.u.mchk.mcic = 0x00400f1d40330000,
|
|
};
|
|
kvm_s390_floating_interrupt(&irq);
|
|
}
|
|
|
|
void kvm_s390_enable_css_support(S390CPU *cpu)
|
|
{
|
|
int r;
|
|
|
|
/* Activate host kernel channel subsystem support. */
|
|
r = kvm_vcpu_enable_cap(CPU(cpu), KVM_CAP_S390_CSS_SUPPORT, 0);
|
|
assert(r == 0);
|
|
}
|
|
|
|
void kvm_arch_init_irq_routing(KVMState *s)
|
|
{
|
|
/*
|
|
* Note that while irqchip capabilities generally imply that cpustates
|
|
* are handled in-kernel, it is not true for s390 (yet); therefore, we
|
|
* have to override the common code kvm_halt_in_kernel_allowed setting.
|
|
*/
|
|
if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
|
|
kvm_irqfds_allowed = true;
|
|
kvm_gsi_routing_allowed = true;
|
|
kvm_halt_in_kernel_allowed = false;
|
|
}
|
|
}
|
|
|
|
int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
|
|
int vq, bool assign)
|
|
{
|
|
struct kvm_ioeventfd kick = {
|
|
.flags = KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY |
|
|
KVM_IOEVENTFD_FLAG_DATAMATCH,
|
|
.fd = event_notifier_get_fd(notifier),
|
|
.datamatch = vq,
|
|
.addr = sch,
|
|
.len = 8,
|
|
};
|
|
if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
|
|
return -ENOSYS;
|
|
}
|
|
if (!assign) {
|
|
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
|
|
}
|
|
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
|
|
}
|