--- /dev/null
+/*
+ * QEMU S390x KVM implementation
+ *
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ * Copyright IBM Corp. 2012
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * Contributions after 2012-10-29 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ *
+ * You should have received a copy of the GNU (Lesser) General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#include <linux/kvm.h>
+#include <asm/ptrace.h>
+
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+#include "qemu/timer.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
+#include "hw/hw.h"
+#include "cpu.h"
+#include "sysemu/device_tree.h"
+#include "qapi/qmp/qjson.h"
+#include "exec/gdbstub.h"
+#include "exec/address-spaces.h"
+#include "trace.h"
+#include "qapi-event.h"
+#include "hw/s390x/s390-pci-inst.h"
+#include "hw/s390x/s390-pci-bus.h"
+#include "hw/s390x/ipl.h"
+#include "hw/s390x/ebcdic.h"
+#include "exec/memattrs.h"
+
+/* #define DEBUG_KVM */
+
+#ifdef DEBUG_KVM
+#define DPRINTF(fmt, ...) \
+ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+ do { } while (0)
+#endif
+
+#define kvm_vm_check_mem_attr(s, attr) \
+ kvm_vm_check_attr(s, KVM_S390_VM_MEM_CTRL, attr)
+
+#define IPA0_DIAG 0x8300
+#define IPA0_SIGP 0xae00
+#define IPA0_B2 0xb200
+#define IPA0_B9 0xb900
+#define IPA0_EB 0xeb00
+#define IPA0_E3 0xe300
+
+#define PRIV_B2_SCLP_CALL 0x20
+#define PRIV_B2_CSCH 0x30
+#define PRIV_B2_HSCH 0x31
+#define PRIV_B2_MSCH 0x32
+#define PRIV_B2_SSCH 0x33
+#define PRIV_B2_STSCH 0x34
+#define PRIV_B2_TSCH 0x35
+#define PRIV_B2_TPI 0x36
+#define PRIV_B2_SAL 0x37
+#define PRIV_B2_RSCH 0x38
+#define PRIV_B2_STCRW 0x39
+#define PRIV_B2_STCPS 0x3a
+#define PRIV_B2_RCHP 0x3b
+#define PRIV_B2_SCHM 0x3c
+#define PRIV_B2_CHSC 0x5f
+#define PRIV_B2_SIGA 0x74
+#define PRIV_B2_XSCH 0x76
+
+#define PRIV_EB_SQBS 0x8a
+#define PRIV_EB_PCISTB 0xd0
+#define PRIV_EB_SIC 0xd1
+
+#define PRIV_B9_EQBS 0x9c
+#define PRIV_B9_CLP 0xa0
+#define PRIV_B9_PCISTG 0xd0
+#define PRIV_B9_PCILG 0xd2
+#define PRIV_B9_RPCIT 0xd3
+
+#define PRIV_E3_MPCIFC 0xd0
+#define PRIV_E3_STPCIFC 0xd4
+
+#define DIAG_TIMEREVENT 0x288
+#define DIAG_IPL 0x308
+#define DIAG_KVM_HYPERCALL 0x500
+#define DIAG_KVM_BREAKPOINT 0x501
+
+#define ICPT_INSTRUCTION 0x04
+#define ICPT_PROGRAM 0x08
+#define ICPT_EXT_INT 0x14
+#define ICPT_WAITPSW 0x1c
+#define ICPT_SOFT_INTERCEPT 0x24
+#define ICPT_CPU_STOP 0x28
+#define ICPT_IO 0x40
+
+#define NR_LOCAL_IRQS 32
+/*
+ * Needs to be big enough to contain max_cpus emergency signals
+ * and in addition NR_LOCAL_IRQS interrupts
+ */
+#define VCPU_IRQ_BUF_SIZE (sizeof(struct kvm_s390_irq) * \
+ (max_cpus + NR_LOCAL_IRQS))
+
+static CPUWatchpoint hw_watchpoint;
+/*
+ * We don't use a list because this structure is also used to transmit the
+ * hardware breakpoints to the kernel.
+ */
+static struct kvm_hw_breakpoint *hw_breakpoints;
+static int nb_hw_breakpoints;
+
+const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
+ KVM_CAP_LAST_INFO
+};
+
+static int cap_sync_regs;
+static int cap_async_pf;
+static int cap_mem_op;
+static int cap_s390_irq;
+
+static void *legacy_s390_alloc(size_t size, uint64_t *align);
+
+static int kvm_s390_query_mem_limit(KVMState *s, uint64_t *memory_limit)
+{
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_MEM_CTRL,
+ .attr = KVM_S390_VM_MEM_LIMIT_SIZE,
+ .addr = (uint64_t) memory_limit,
+ };
+
+ return kvm_vm_ioctl(s, KVM_GET_DEVICE_ATTR, &attr);
+}
+
+int kvm_s390_set_mem_limit(KVMState *s, uint64_t new_limit, uint64_t *hw_limit)
+{
+ int rc;
+
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_MEM_CTRL,
+ .attr = KVM_S390_VM_MEM_LIMIT_SIZE,
+ .addr = (uint64_t) &new_limit,
+ };
+
+ if (!kvm_vm_check_mem_attr(s, KVM_S390_VM_MEM_LIMIT_SIZE)) {
+ return 0;
+ }
+
+ rc = kvm_s390_query_mem_limit(s, hw_limit);
+ if (rc) {
+ return rc;
+ } else if (*hw_limit < new_limit) {
+ return -E2BIG;
+ }
+
+ return kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
+}
+
+void kvm_s390_clear_cmma_callback(void *opaque)
+{
+ int rc;
+ KVMState *s = opaque;
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_MEM_CTRL,
+ .attr = KVM_S390_VM_MEM_CLR_CMMA,
+ };
+
+ rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
+ trace_kvm_clear_cmma(rc);
+}
+
+static void kvm_s390_enable_cmma(KVMState *s)
+{
+ int rc;
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_MEM_CTRL,
+ .attr = KVM_S390_VM_MEM_ENABLE_CMMA,
+ };
+
+ if (!kvm_vm_check_mem_attr(s, KVM_S390_VM_MEM_ENABLE_CMMA) ||
+ !kvm_vm_check_mem_attr(s, KVM_S390_VM_MEM_CLR_CMMA)) {
+ return;
+ }
+
+ rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
+ if (!rc) {
+ qemu_register_reset(kvm_s390_clear_cmma_callback, s);
+ }
+ trace_kvm_enable_cmma(rc);
+}
+
+static void kvm_s390_set_attr(uint64_t attr)
+{
+ struct kvm_device_attr attribute = {
+ .group = KVM_S390_VM_CRYPTO,
+ .attr = attr,
+ };
+
+ int ret = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute);
+
+ if (ret) {
+ error_report("Failed to set crypto device attribute %lu: %s",
+ attr, strerror(-ret));
+ }
+}
+
+static void kvm_s390_init_aes_kw(void)
+{
+ uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_AES_KW;
+
+ if (object_property_get_bool(OBJECT(qdev_get_machine()), "aes-key-wrap",
+ NULL)) {
+ attr = KVM_S390_VM_CRYPTO_ENABLE_AES_KW;
+ }
+
+ if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) {
+ kvm_s390_set_attr(attr);
+ }
+}
+
+static void kvm_s390_init_dea_kw(void)
+{
+ uint64_t attr = KVM_S390_VM_CRYPTO_DISABLE_DEA_KW;
+
+ if (object_property_get_bool(OBJECT(qdev_get_machine()), "dea-key-wrap",
+ NULL)) {
+ attr = KVM_S390_VM_CRYPTO_ENABLE_DEA_KW;
+ }
+
+ if (kvm_vm_check_attr(kvm_state, KVM_S390_VM_CRYPTO, attr)) {
+ kvm_s390_set_attr(attr);
+ }
+}
+
+static void kvm_s390_init_crypto(void)
+{
+ kvm_s390_init_aes_kw();
+ kvm_s390_init_dea_kw();
+}
+
+int kvm_arch_init(MachineState *ms, KVMState *s)
+{
+ cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
+ cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
+ cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);
+ cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ);
+
+ kvm_s390_enable_cmma(s);
+
+ if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
+ || !kvm_check_extension(s, KVM_CAP_S390_COW)) {
+ phys_mem_set_alloc(legacy_s390_alloc);
+ }
+
+ kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0);
+ kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0);
+ kvm_vm_enable_cap(s, KVM_CAP_S390_USER_STSI, 0);
+
+ return 0;
+}
+
+unsigned long kvm_arch_vcpu_id(CPUState *cpu)
+{
+ return cpu->cpu_index;
+}
+
+int kvm_arch_init_vcpu(CPUState *cs)
+{
+ S390CPU *cpu = S390_CPU(cs);
+ kvm_s390_set_cpu_state(cpu, cpu->env.cpu_state);
+ cpu->irqstate = g_malloc0(VCPU_IRQ_BUF_SIZE);
+ return 0;
+}
+
+void kvm_s390_reset_vcpu(S390CPU *cpu)
+{
+ CPUState *cs = CPU(cpu);
+
+ /* The initial reset call is needed here to reset in-kernel
+ * vcpu data that we can't access directly from QEMU
+ * (i.e. with older kernels which don't support sync_regs/ONE_REG).
+ * Before this ioctl cpu_synchronize_state() is called in common kvm
+ * code (kvm-all) */
+ if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL)) {
+ error_report("Initial CPU reset failed on CPU %i", cs->cpu_index);
+ }
+
+ kvm_s390_init_crypto();
+}
+
+static int can_sync_regs(CPUState *cs, int regs)
+{
+ return cap_sync_regs && (cs->kvm_run->kvm_valid_regs & regs) == regs;
+}
+
+int kvm_arch_put_registers(CPUState *cs, int level)
+{
+ S390CPU *cpu = S390_CPU(cs);
+ CPUS390XState *env = &cpu->env;
+ struct kvm_sregs sregs;
+ struct kvm_regs regs;
+ struct kvm_fpu fpu = {};
+ int r;
+ int i;
+
+ /* always save the PSW and the GPRS*/
+ cs->kvm_run->psw_addr = env->psw.addr;
+ cs->kvm_run->psw_mask = env->psw.mask;
+
+ if (can_sync_regs(cs, KVM_SYNC_GPRS)) {
+ for (i = 0; i < 16; i++) {
+ cs->kvm_run->s.regs.gprs[i] = env->regs[i];
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GPRS;
+ }
+ } else {
+ for (i = 0; i < 16; i++) {
+ regs.gprs[i] = env->regs[i];
+ }
+ r = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
+ if (r < 0) {
+ return r;
+ }
+ }
+
+ if (can_sync_regs(cs, KVM_SYNC_VRS)) {
+ for (i = 0; i < 32; i++) {
+ cs->kvm_run->s.regs.vrs[i][0] = env->vregs[i][0].ll;
+ cs->kvm_run->s.regs.vrs[i][1] = env->vregs[i][1].ll;
+ }
+ cs->kvm_run->s.regs.fpc = env->fpc;
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_VRS;
+ } else {
+ /* Floating point */
+ for (i = 0; i < 16; i++) {
+ fpu.fprs[i] = get_freg(env, i)->ll;
+ }
+ fpu.fpc = env->fpc;
+
+ r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
+ if (r < 0) {
+ return r;
+ }
+ }
+
+ /* Do we need to save more than that? */
+ if (level == KVM_PUT_RUNTIME_STATE) {
+ return 0;
+ }
+
+ if (can_sync_regs(cs, KVM_SYNC_ARCH0)) {
+ cs->kvm_run->s.regs.cputm = env->cputm;
+ cs->kvm_run->s.regs.ckc = env->ckc;
+ cs->kvm_run->s.regs.todpr = env->todpr;
+ cs->kvm_run->s.regs.gbea = env->gbea;
+ cs->kvm_run->s.regs.pp = env->pp;
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ARCH0;
+ } else {
+ /*
+ * These ONE_REGS are not protected by a capability. As they are only
+ * necessary for migration we just trace a possible error, but don't
+ * return with an error return code.
+ */
+ kvm_set_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
+ kvm_set_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
+ kvm_set_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
+ kvm_set_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
+ kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp);
+ }
+
+ /* pfault parameters */
+ if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
+ cs->kvm_run->s.regs.pft = env->pfault_token;
+ cs->kvm_run->s.regs.pfs = env->pfault_select;
+ cs->kvm_run->s.regs.pfc = env->pfault_compare;
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PFAULT;
+ } else if (cap_async_pf) {
+ r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
+ if (r < 0) {
+ return r;
+ }
+ r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
+ if (r < 0) {
+ return r;
+ }
+ r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
+ if (r < 0) {
+ return r;
+ }
+ }
+
+ /* access registers and control registers*/
+ if (can_sync_regs(cs, KVM_SYNC_ACRS | KVM_SYNC_CRS)) {
+ for (i = 0; i < 16; i++) {
+ cs->kvm_run->s.regs.acrs[i] = env->aregs[i];
+ cs->kvm_run->s.regs.crs[i] = env->cregs[i];
+ }
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_ACRS;
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_CRS;
+ } else {
+ for (i = 0; i < 16; i++) {
+ sregs.acrs[i] = env->aregs[i];
+ sregs.crs[i] = env->cregs[i];
+ }
+ r = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs);
+ if (r < 0) {
+ return r;
+ }
+ }
+
+ /* Finally the prefix */
+ if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {
+ cs->kvm_run->s.regs.prefix = env->psa;
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_PREFIX;
+ } else {
+ /* prefix is only supported via sync regs */
+ }
+ return 0;
+}
+
+int kvm_arch_get_registers(CPUState *cs)
+{
+ S390CPU *cpu = S390_CPU(cs);
+ CPUS390XState *env = &cpu->env;
+ struct kvm_sregs sregs;
+ struct kvm_regs regs;
+ struct kvm_fpu fpu;
+ int i, r;
+
+ /* get the PSW */
+ env->psw.addr = cs->kvm_run->psw_addr;
+ env->psw.mask = cs->kvm_run->psw_mask;
+
+ /* the GPRS */
+ if (can_sync_regs(cs, KVM_SYNC_GPRS)) {
+ for (i = 0; i < 16; i++) {
+ env->regs[i] = cs->kvm_run->s.regs.gprs[i];
+ }
+ } else {
+ r = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s);
+ if (r < 0) {
+ return r;
+ }
+ for (i = 0; i < 16; i++) {
+ env->regs[i] = regs.gprs[i];
+ }
+ }
+
+ /* The ACRS and CRS */
+ if (can_sync_regs(cs, KVM_SYNC_ACRS | KVM_SYNC_CRS)) {
+ for (i = 0; i < 16; i++) {
+ env->aregs[i] = cs->kvm_run->s.regs.acrs[i];
+ env->cregs[i] = cs->kvm_run->s.regs.crs[i];
+ }
+ } else {
+ r = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs);
+ if (r < 0) {
+ return r;
+ }
+ for (i = 0; i < 16; i++) {
+ env->aregs[i] = sregs.acrs[i];
+ env->cregs[i] = sregs.crs[i];
+ }
+ }
+
+ /* Floating point and vector registers */
+ if (can_sync_regs(cs, KVM_SYNC_VRS)) {
+ for (i = 0; i < 32; i++) {
+ env->vregs[i][0].ll = cs->kvm_run->s.regs.vrs[i][0];
+ env->vregs[i][1].ll = cs->kvm_run->s.regs.vrs[i][1];
+ }
+ env->fpc = cs->kvm_run->s.regs.fpc;
+ } else {
+ r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
+ if (r < 0) {
+ return r;
+ }
+ for (i = 0; i < 16; i++) {
+ get_freg(env, i)->ll = fpu.fprs[i];
+ }
+ env->fpc = fpu.fpc;
+ }
+
+ /* The prefix */
+ if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {
+ env->psa = cs->kvm_run->s.regs.prefix;
+ }
+
+ if (can_sync_regs(cs, KVM_SYNC_ARCH0)) {
+ env->cputm = cs->kvm_run->s.regs.cputm;
+ env->ckc = cs->kvm_run->s.regs.ckc;
+ env->todpr = cs->kvm_run->s.regs.todpr;
+ env->gbea = cs->kvm_run->s.regs.gbea;
+ env->pp = cs->kvm_run->s.regs.pp;
+ } else {
+ /*
+ * These ONE_REGS are not protected by a capability. As they are only
+ * necessary for migration we just trace a possible error, but don't
+ * return with an error return code.
+ */
+ kvm_get_one_reg(cs, KVM_REG_S390_CPU_TIMER, &env->cputm);
+ kvm_get_one_reg(cs, KVM_REG_S390_CLOCK_COMP, &env->ckc);
+ kvm_get_one_reg(cs, KVM_REG_S390_TODPR, &env->todpr);
+ kvm_get_one_reg(cs, KVM_REG_S390_GBEA, &env->gbea);
+ kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp);
+ }
+
+ /* pfault parameters */
+ if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
+ env->pfault_token = cs->kvm_run->s.regs.pft;
+ env->pfault_select = cs->kvm_run->s.regs.pfs;
+ env->pfault_compare = cs->kvm_run->s.regs.pfc;
+ } else if (cap_async_pf) {
+ r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
+ if (r < 0) {
+ return r;
+ }
+ r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
+ if (r < 0) {
+ return r;
+ }
+ r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
+ if (r < 0) {
+ return r;
+ }
+ }
+
+ return 0;
+}
+
+int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_low)
+{
+ int r;
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_TOD,
+ .attr = KVM_S390_VM_TOD_LOW,
+ .addr = (uint64_t)tod_low,
+ };
+
+ r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+ if (r) {
+ return r;
+ }
+
+ attr.attr = KVM_S390_VM_TOD_HIGH;
+ attr.addr = (uint64_t)tod_high;
+ return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+}
+
+int kvm_s390_set_clock(uint8_t *tod_high, uint64_t *tod_low)
+{
+ int r;
+
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_TOD,
+ .attr = KVM_S390_VM_TOD_LOW,
+ .addr = (uint64_t)tod_low,
+ };
+
+ r = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+ if (r) {
+ return r;
+ }
+
+ attr.attr = KVM_S390_VM_TOD_HIGH;
+ attr.addr = (uint64_t)tod_high;
+ return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+}
+
+/**
+ * kvm_s390_mem_op:
+ * @addr: the logical start address in guest memory
+ * @ar: the access register number
+ * @hostbuf: buffer in host memory. NULL = do only checks w/o copying
+ * @len: length that should be transfered
+ * @is_write: true = write, false = read
+ * Returns: 0 on success, non-zero if an exception or error occured
+ *
+ * Use KVM ioctl to read/write from/to guest memory. An access exception
+ * is injected into the vCPU in case of translation errors.
+ */
+int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, uint8_t ar, void *hostbuf,
+ int len, bool is_write)
+{
+ struct kvm_s390_mem_op mem_op = {
+ .gaddr = addr,
+ .flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION,
+ .size = len,
+ .op = is_write ? KVM_S390_MEMOP_LOGICAL_WRITE
+ : KVM_S390_MEMOP_LOGICAL_READ,
+ .buf = (uint64_t)hostbuf,
+ .ar = ar,
+ };
+ int ret;
+
+ if (!cap_mem_op) {
+ return -ENOSYS;
+ }
+ if (!hostbuf) {
+ mem_op.flags |= KVM_S390_MEMOP_F_CHECK_ONLY;
+ }
+
+ ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op);
+ if (ret < 0) {
+ error_printf("KVM_S390_MEM_OP failed: %s\n", strerror(-ret));
+ }
+ return ret;
+}
+
+/*
+ * Legacy layout for s390:
+ * Older S390 KVM requires the topmost vma of the RAM to be
+ * smaller than an system defined value, which is at least 256GB.
+ * Larger systems have larger values. We put the guest between
+ * the end of data segment (system break) and this value. We
+ * use 32GB as a base to have enough room for the system break
+ * to grow. We also have to use MAP parameters that avoid
+ * read-only mapping of guest pages.
+ */
+static void *legacy_s390_alloc(size_t size, uint64_t *align)
+{
+ void *mem;
+
+ mem = mmap((void *) 0x800000000ULL, size,
+ PROT_EXEC|PROT_READ|PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
+ return mem == MAP_FAILED ? NULL : mem;
+}
+
+/* DIAG 501 is used for sw breakpoints */
+static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
+
+int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
+{
+
+ if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
+ sizeof(diag_501), 0) ||
+ cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501,
+ sizeof(diag_501), 1)) {
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
+{
+ uint8_t t[sizeof(diag_501)];
+
+ if (cpu_memory_rw_debug(cs, bp->pc, t, sizeof(diag_501), 0)) {
+ return -EINVAL;
+ } else if (memcmp(t, diag_501, sizeof(diag_501))) {
+ return -EINVAL;
+ } else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
+ sizeof(diag_501), 1)) {
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct kvm_hw_breakpoint *find_hw_breakpoint(target_ulong addr,
+ int len, int type)
+{
+ int n;
+
+ for (n = 0; n < nb_hw_breakpoints; n++) {
+ if (hw_breakpoints[n].addr == addr && hw_breakpoints[n].type == type &&
+ (hw_breakpoints[n].len == len || len == -1)) {
+ return &hw_breakpoints[n];
+ }
+ }
+
+ return NULL;
+}
+
+static int insert_hw_breakpoint(target_ulong addr, int len, int type)
+{
+ int size;
+
+ if (find_hw_breakpoint(addr, len, type)) {
+ return -EEXIST;
+ }
+
+ size = (nb_hw_breakpoints + 1) * sizeof(struct kvm_hw_breakpoint);
+
+ if (!hw_breakpoints) {
+ nb_hw_breakpoints = 0;
+ hw_breakpoints = (struct kvm_hw_breakpoint *)g_try_malloc(size);
+ } else {
+ hw_breakpoints =
+ (struct kvm_hw_breakpoint *)g_try_realloc(hw_breakpoints, size);
+ }
+
+ if (!hw_breakpoints) {
+ nb_hw_breakpoints = 0;
+ return -ENOMEM;
+ }
+
+ hw_breakpoints[nb_hw_breakpoints].addr = addr;
+ hw_breakpoints[nb_hw_breakpoints].len = len;
+ hw_breakpoints[nb_hw_breakpoints].type = type;
+
+ nb_hw_breakpoints++;
+
+ return 0;
+}
+
+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)
+{
+}
+
+MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run)
+{
+ return MEMTXATTRS_UNSPECIFIED;
+}
+
+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;
+}
+
+static void inject_vcpu_irq_legacy(CPUState *cs, 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_vcpu_ioctl(cs, KVM_S390_INTERRUPT, &kvmint);
+ if (r < 0) {
+ fprintf(stderr, "KVM failed to inject interrupt\n");
+ exit(1);
+ }
+}
+
+void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq)
+{
+ CPUState *cs = CPU(cpu);
+ int r;
+
+ if (cap_s390_irq) {
+ r = kvm_vcpu_ioctl(cs, KVM_S390_IRQ, irq);
+ if (!r) {
+ return;
+ }
+ error_report("KVM failed to inject interrupt %llx", irq->type);
+ exit(1);
+ }
+
+ inject_vcpu_irq_legacy(cs, irq);
+}
+
+static 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_floating_interrupt(struct kvm_s390_irq *irq)
+{
+ static bool use_flic = true;
+ int r;
+
+ if (use_flic) {
+ r = kvm_s390_inject_flic(irq);
+ if (r == -ENOSYS) {
+ use_flic = false;
+ }
+ if (!r) {
+ return;
+ }
+ }
+ __kvm_s390_floating_interrupt(irq);
+}
+
+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);
+}
+
+void kvm_s390_access_exception(S390CPU *cpu, uint16_t code, uint64_t te_code)
+{
+ struct kvm_s390_irq irq = {
+ .type = KVM_S390_PROGRAM_INT,
+ .u.pgm.code = code,
+ .u.pgm.trans_exc_code = te_code,
+ .u.pgm.exc_access_id = te_code & 3,
+ };
+
+ 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 uint64_t get_base_disp_rxy(S390CPU *cpu, struct kvm_run *run,
+ uint8_t *ar)
+{
+ CPUS390XState *env = &cpu->env;
+ uint32_t x2 = (run->s390_sieic.ipa & 0x000f);
+ uint32_t base2 = run->s390_sieic.ipb >> 28;
+ uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
+ ((run->s390_sieic.ipb & 0xff00) << 4);
+
+ if (disp2 & 0x80000) {
+ disp2 += 0xfff00000;
+ }
+ if (ar) {
+ *ar = base2;
+ }
+
+ return (base2 ? env->regs[base2] : 0) +
+ (x2 ? env->regs[x2] : 0) + (long)(int)disp2;
+}
+
+static uint64_t get_base_disp_rsy(S390CPU *cpu, struct kvm_run *run,
+ uint8_t *ar)
+{
+ CPUS390XState *env = &cpu->env;
+ uint32_t base2 = run->s390_sieic.ipb >> 28;
+ uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
+ ((run->s390_sieic.ipb & 0xff00) << 4);
+
+ if (disp2 & 0x80000) {
+ disp2 += 0xfff00000;
+ }
+ if (ar) {
+ *ar = base2;
+ }
+
+ return (base2 ? env->regs[base2] : 0) + (long)(int)disp2;
+}
+
+static int kvm_clp_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+ return clp_service_call(cpu, r2);
+}
+
+static int kvm_pcilg_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
+ uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+ return pcilg_service_call(cpu, r1, r2);
+}
+
+static int kvm_pcistg_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
+ uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+ return pcistg_service_call(cpu, r1, r2);
+}
+
+static int kvm_stpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+ uint64_t fiba;
+ uint8_t ar;
+
+ cpu_synchronize_state(CPU(cpu));
+ fiba = get_base_disp_rxy(cpu, run, &ar);
+
+ return stpcifc_service_call(cpu, r1, fiba, ar);
+}
+
+static int kvm_sic_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ /* NOOP */
+ return 0;
+}
+
+static int kvm_rpcit_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
+ uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+ return rpcit_service_call(cpu, r1, r2);
+}
+
+static int kvm_pcistb_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+ uint8_t r3 = run->s390_sieic.ipa & 0x000f;
+ uint64_t gaddr;
+ uint8_t ar;
+
+ cpu_synchronize_state(CPU(cpu));
+ gaddr = get_base_disp_rsy(cpu, run, &ar);
+
+ return pcistb_service_call(cpu, r1, r3, gaddr, ar);
+}
+
+static int kvm_mpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+ uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+ uint64_t fiba;
+ uint8_t ar;
+
+ cpu_synchronize_state(CPU(cpu));
+ fiba = get_base_disp_rxy(cpu, run, &ar);
+
+ return mpcifc_service_call(cpu, r1, fiba, ar);
+}
+
+static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
+{
+ int r = 0;
+
+ switch (ipa1) {
+ case PRIV_B9_CLP:
+ r = kvm_clp_service_call(cpu, run);
+ break;
+ case PRIV_B9_PCISTG:
+ r = kvm_pcistg_service_call(cpu, run);
+ break;
+ case PRIV_B9_PCILG:
+ r = kvm_pcilg_service_call(cpu, run);
+ break;
+ case PRIV_B9_RPCIT:
+ r = kvm_rpcit_service_call(cpu, run);
+ break;
+ 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 ipbl)
+{
+ int r = 0;
+
+ switch (ipbl) {
+ case PRIV_EB_PCISTB:
+ r = kvm_pcistb_service_call(cpu, run);
+ break;
+ case PRIV_EB_SIC:
+ r = kvm_sic_service_call(cpu, run);
+ break;
+ case PRIV_EB_SQBS:
+ /* just inject exception */
+ r = -1;
+ break;
+ default:
+ r = -1;
+ DPRINTF("KVM: unhandled PRIV: 0xeb%x\n", ipbl);
+ break;
+ }
+
+ return r;
+}
+
+static int handle_e3(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
+{
+ int r = 0;
+
+ switch (ipbl) {
+ case PRIV_E3_MPCIFC:
+ r = kvm_mpcifc_service_call(cpu, run);
+ break;
+ case PRIV_E3_STPCIFC:
+ r = kvm_stpcifc_service_call(cpu, run);
+ break;
+ default:
+ r = -1;
+ DPRINTF("KVM: unhandled PRIV: 0xe3%x\n", ipbl);
+ 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_288(S390CPU *cpu, struct kvm_run *run)
+{
+ uint64_t r1, r3;
+ int rc;
+
+ cpu_synchronize_state(CPU(cpu));
+ r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+ r3 = run->s390_sieic.ipa & 0x000f;
+ rc = handle_diag_288(&cpu->env, r1, r3);
+ if (rc) {
+ enter_pgmcheck(cpu, PGM_SPECIFICATION);
+ }
+}
+
+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) >> 4;
+ 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, NULL) & DIAG_KVM_CODE_MASK;
+ switch (func_code) {
+ case DIAG_TIMEREVENT:
+ kvm_handle_diag_288(cpu, run);
+ break;
+ 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);
+ enter_pgmcheck(cpu, PGM_SPECIFICATION);
+ break;
+ }
+
+ return r;
+}
+
+typedef struct SigpInfo {
+ S390CPU *cpu;
+ uint64_t param;
+ int cc;
+ uint64_t *status_reg;
+} SigpInfo;
+
+static void set_sigp_status(SigpInfo *si, uint64_t status)
+{
+ *si->status_reg &= 0xffffffff00000000ULL;
+ *si->status_reg |= status;
+ si->cc = SIGP_CC_STATUS_STORED;
+}
+
+static void sigp_start(void *arg)
+{
+ SigpInfo *si = arg;
+
+ if (s390_cpu_get_state(si->cpu) != CPU_STATE_STOPPED) {
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+ return;
+ }
+
+ s390_cpu_set_state(CPU_STATE_OPERATING, si->cpu);
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+static void sigp_stop(void *arg)
+{
+ SigpInfo *si = arg;
+ struct kvm_s390_irq irq = {
+ .type = KVM_S390_SIGP_STOP,
+ };
+
+ if (s390_cpu_get_state(si->cpu) != CPU_STATE_OPERATING) {
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+ return;
+ }
+
+ /* disabled wait - sleeping in user space */
+ if (CPU(si->cpu)->halted) {
+ s390_cpu_set_state(CPU_STATE_STOPPED, si->cpu);
+ } else {
+ /* execute the stop function */
+ si->cpu->env.sigp_order = SIGP_STOP;
+ kvm_s390_vcpu_interrupt(si->cpu, &irq);
+ }
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+#define ADTL_SAVE_AREA_SIZE 1024
+static int kvm_s390_store_adtl_status(S390CPU *cpu, hwaddr addr)
+{
+ void *mem;
+ hwaddr len = ADTL_SAVE_AREA_SIZE;
+
+ mem = cpu_physical_memory_map(addr, &len, 1);
+ if (!mem) {
+ return -EFAULT;
+ }
+ if (len != ADTL_SAVE_AREA_SIZE) {
+ cpu_physical_memory_unmap(mem, len, 1, 0);
+ return -EFAULT;
+ }
+
+ memcpy(mem, &cpu->env.vregs, 512);
+
+ cpu_physical_memory_unmap(mem, len, 1, len);
+
+ return 0;
+}
+
+#define KVM_S390_STORE_STATUS_DEF_ADDR offsetof(LowCore, floating_pt_save_area)
+#define SAVE_AREA_SIZE 512
+static int kvm_s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch)
+{
+ static const uint8_t ar_id = 1;
+ uint64_t ckc = cpu->env.ckc >> 8;
+ void *mem;
+ int i;
+ hwaddr len = SAVE_AREA_SIZE;
+
+ mem = cpu_physical_memory_map(addr, &len, 1);
+ if (!mem) {
+ return -EFAULT;
+ }
+ if (len != SAVE_AREA_SIZE) {
+ cpu_physical_memory_unmap(mem, len, 1, 0);
+ return -EFAULT;
+ }
+
+ if (store_arch) {
+ cpu_physical_memory_write(offsetof(LowCore, ar_access_id), &ar_id, 1);
+ }
+ for (i = 0; i < 16; ++i) {
+ *((uint64 *)mem + i) = get_freg(&cpu->env, i)->ll;
+ }
+ memcpy(mem + 128, &cpu->env.regs, 128);
+ memcpy(mem + 256, &cpu->env.psw, 16);
+ memcpy(mem + 280, &cpu->env.psa, 4);
+ memcpy(mem + 284, &cpu->env.fpc, 4);
+ memcpy(mem + 292, &cpu->env.todpr, 4);
+ memcpy(mem + 296, &cpu->env.cputm, 8);
+ memcpy(mem + 304, &ckc, 8);
+ memcpy(mem + 320, &cpu->env.aregs, 64);
+ memcpy(mem + 384, &cpu->env.cregs, 128);
+
+ cpu_physical_memory_unmap(mem, len, 1, len);
+
+ return 0;
+}
+
+static void sigp_stop_and_store_status(void *arg)
+{
+ SigpInfo *si = arg;
+ struct kvm_s390_irq irq = {
+ .type = KVM_S390_SIGP_STOP,
+ };
+
+ /* disabled wait - sleeping in user space */
+ if (s390_cpu_get_state(si->cpu) == CPU_STATE_OPERATING &&
+ CPU(si->cpu)->halted) {
+ s390_cpu_set_state(CPU_STATE_STOPPED, si->cpu);
+ }
+
+ switch (s390_cpu_get_state(si->cpu)) {
+ case CPU_STATE_OPERATING:
+ si->cpu->env.sigp_order = SIGP_STOP_STORE_STATUS;
+ kvm_s390_vcpu_interrupt(si->cpu, &irq);
+ /* store will be performed when handling the stop intercept */
+ break;
+ case CPU_STATE_STOPPED:
+ /* already stopped, just store the status */
+ cpu_synchronize_state(CPU(si->cpu));
+ kvm_s390_store_status(si->cpu, KVM_S390_STORE_STATUS_DEF_ADDR, true);
+ break;
+ }
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+static void sigp_store_status_at_address(void *arg)
+{
+ SigpInfo *si = arg;
+ uint32_t address = si->param & 0x7ffffe00u;
+
+ /* cpu has to be stopped */
+ if (s390_cpu_get_state(si->cpu) != CPU_STATE_STOPPED) {
+ set_sigp_status(si, SIGP_STAT_INCORRECT_STATE);
+ return;
+ }
+
+ cpu_synchronize_state(CPU(si->cpu));
+
+ if (kvm_s390_store_status(si->cpu, address, false)) {
+ set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+ return;
+ }
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+static void sigp_store_adtl_status(void *arg)
+{
+ SigpInfo *si = arg;
+
+ if (!kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) {
+ set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
+ return;
+ }
+
+ /* cpu has to be stopped */
+ if (s390_cpu_get_state(si->cpu) != CPU_STATE_STOPPED) {
+ set_sigp_status(si, SIGP_STAT_INCORRECT_STATE);
+ return;
+ }
+
+ /* parameter must be aligned to 1024-byte boundary */
+ if (si->param & 0x3ff) {
+ set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+ return;
+ }
+
+ cpu_synchronize_state(CPU(si->cpu));
+
+ if (kvm_s390_store_adtl_status(si->cpu, si->param)) {
+ set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+ return;
+ }
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+static void sigp_restart(void *arg)
+{
+ SigpInfo *si = arg;
+ struct kvm_s390_irq irq = {
+ .type = KVM_S390_RESTART,
+ };
+
+ switch (s390_cpu_get_state(si->cpu)) {
+ case CPU_STATE_STOPPED:
+ /* the restart irq has to be delivered prior to any other pending irq */
+ cpu_synchronize_state(CPU(si->cpu));
+ do_restart_interrupt(&si->cpu->env);
+ s390_cpu_set_state(CPU_STATE_OPERATING, si->cpu);
+ break;
+ case CPU_STATE_OPERATING:
+ kvm_s390_vcpu_interrupt(si->cpu, &irq);
+ break;
+ }
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+int kvm_s390_cpu_restart(S390CPU *cpu)
+{
+ SigpInfo si = {
+ .cpu = cpu,
+ };
+
+ run_on_cpu(CPU(cpu), sigp_restart, &si);
+ DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
+ return 0;
+}
+
+static void sigp_initial_cpu_reset(void *arg)
+{
+ SigpInfo *si = arg;
+ CPUState *cs = CPU(si->cpu);
+ S390CPUClass *scc = S390_CPU_GET_CLASS(si->cpu);
+
+ cpu_synchronize_state(cs);
+ scc->initial_cpu_reset(cs);
+ cpu_synchronize_post_reset(cs);
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+static void sigp_cpu_reset(void *arg)
+{
+ SigpInfo *si = arg;
+ CPUState *cs = CPU(si->cpu);
+ S390CPUClass *scc = S390_CPU_GET_CLASS(si->cpu);
+
+ cpu_synchronize_state(cs);
+ scc->cpu_reset(cs);
+ cpu_synchronize_post_reset(cs);
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+static void sigp_set_prefix(void *arg)
+{
+ SigpInfo *si = arg;
+ uint32_t addr = si->param & 0x7fffe000u;
+
+ cpu_synchronize_state(CPU(si->cpu));
+
+ if (!address_space_access_valid(&address_space_memory, addr,
+ sizeof(struct LowCore), false)) {
+ set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+ return;
+ }
+
+ /* cpu has to be stopped */
+ if (s390_cpu_get_state(si->cpu) != CPU_STATE_STOPPED) {
+ set_sigp_status(si, SIGP_STAT_INCORRECT_STATE);
+ return;
+ }
+
+ si->cpu->env.psa = addr;
+ cpu_synchronize_post_init(CPU(si->cpu));
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+static int handle_sigp_single_dst(S390CPU *dst_cpu, uint8_t order,
+ uint64_t param, uint64_t *status_reg)
+{
+ SigpInfo si = {
+ .cpu = dst_cpu,
+ .param = param,
+ .status_reg = status_reg,
+ };
+
+ /* cpu available? */
+ if (dst_cpu == NULL) {
+ return SIGP_CC_NOT_OPERATIONAL;
+ }
+
+ /* only resets can break pending orders */
+ if (dst_cpu->env.sigp_order != 0 &&
+ order != SIGP_CPU_RESET &&
+ order != SIGP_INITIAL_CPU_RESET) {
+ return SIGP_CC_BUSY;
+ }
+
+ switch (order) {
+ case SIGP_START:
+ run_on_cpu(CPU(dst_cpu), sigp_start, &si);
+ break;
+ case SIGP_STOP:
+ run_on_cpu(CPU(dst_cpu), sigp_stop, &si);
+ break;
+ case SIGP_RESTART:
+ run_on_cpu(CPU(dst_cpu), sigp_restart, &si);
+ break;
+ case SIGP_STOP_STORE_STATUS:
+ run_on_cpu(CPU(dst_cpu), sigp_stop_and_store_status, &si);
+ break;
+ case SIGP_STORE_STATUS_ADDR:
+ run_on_cpu(CPU(dst_cpu), sigp_store_status_at_address, &si);
+ break;
+ case SIGP_STORE_ADTL_STATUS:
+ run_on_cpu(CPU(dst_cpu), sigp_store_adtl_status, &si);
+ break;
+ case SIGP_SET_PREFIX:
+ run_on_cpu(CPU(dst_cpu), sigp_set_prefix, &si);
+ break;
+ case SIGP_INITIAL_CPU_RESET:
+ run_on_cpu(CPU(dst_cpu), sigp_initial_cpu_reset, &si);
+ break;
+ case SIGP_CPU_RESET:
+ run_on_cpu(CPU(dst_cpu), sigp_cpu_reset, &si);
+ break;
+ default:
+ DPRINTF("KVM: unknown SIGP: 0x%x\n", order);
+ set_sigp_status(&si, SIGP_STAT_INVALID_ORDER);
+ }
+
+ return si.cc;
+}
+
+static int sigp_set_architecture(S390CPU *cpu, uint32_t param,
+ uint64_t *status_reg)
+{
+ CPUState *cur_cs;
+ S390CPU *cur_cpu;
+
+ /* due to the BQL, we are the only active cpu */
+ CPU_FOREACH(cur_cs) {
+ cur_cpu = S390_CPU(cur_cs);
+ if (cur_cpu->env.sigp_order != 0) {
+ return SIGP_CC_BUSY;
+ }
+ cpu_synchronize_state(cur_cs);
+ /* all but the current one have to be stopped */
+ if (cur_cpu != cpu &&
+ s390_cpu_get_state(cur_cpu) != CPU_STATE_STOPPED) {
+ *status_reg &= 0xffffffff00000000ULL;
+ *status_reg |= SIGP_STAT_INCORRECT_STATE;
+ return SIGP_CC_STATUS_STORED;
+ }
+ }
+
+ switch (param & 0xff) {
+ case SIGP_MODE_ESA_S390:
+ /* not supported */
+ return SIGP_CC_NOT_OPERATIONAL;
+ case SIGP_MODE_Z_ARCH_TRANS_ALL_PSW:
+ case SIGP_MODE_Z_ARCH_TRANS_CUR_PSW:
+ CPU_FOREACH(cur_cs) {
+ cur_cpu = S390_CPU(cur_cs);
+ cur_cpu->env.pfault_token = -1UL;
+ }
+ break;
+ default:
+ *status_reg &= 0xffffffff00000000ULL;
+ *status_reg |= SIGP_STAT_INVALID_PARAMETER;
+ return SIGP_CC_STATUS_STORED;
+ }
+
+ return SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
+#define SIGP_ORDER_MASK 0x000000ff
+
+static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
+{
+ CPUS390XState *env = &cpu->env;
+ const uint8_t r1 = ipa1 >> 4;
+ const uint8_t r3 = ipa1 & 0x0f;
+ int ret;
+ uint8_t order;
+ uint64_t *status_reg;
+ uint64_t param;
+ S390CPU *dst_cpu = NULL;
+
+ cpu_synchronize_state(CPU(cpu));
+
+ /* get order code */
+ order = decode_basedisp_rs(env, run->s390_sieic.ipb, NULL)
+ & SIGP_ORDER_MASK;
+ status_reg = &env->regs[r1];
+ param = (r1 % 2) ? env->regs[r1] : env->regs[r1 + 1];
+
+ switch (order) {
+ case SIGP_SET_ARCH:
+ ret = sigp_set_architecture(cpu, param, status_reg);
+ break;
+ default:
+ /* all other sigp orders target a single vcpu */
+ dst_cpu = s390_cpu_addr2state(env->regs[r3]);
+ ret = handle_sigp_single_dst(dst_cpu, order, param, status_reg);
+ }
+
+ trace_kvm_sigp_finished(order, CPU(cpu)->cpu_index,
+ dst_cpu ? CPU(dst_cpu)->cpu_index : -1, ret);
+
+ if (ret >= 0) {
+ setcc(cpu, ret);
+ return 0;
+ }
+
+ return ret;
+}
+
+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, run->s390_sieic.ipb & 0xff);
+ break;
+ case IPA0_E3:
+ r = handle_e3(cpu, run, run->s390_sieic.ipb & 0xff);
+ 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)
+{
+ qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE,
+ &error_abort);
+ 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_cpu_halt(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 */
+ cpu_synchronize_state(cs);
+ if (s390_cpu_halt(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_cpu_set_state(CPU_STATE_STOPPED, cpu) == 0) {
+ qemu_system_shutdown_request();
+ }
+ if (cpu->env.sigp_order == SIGP_STOP_STORE_STATUS) {
+ kvm_s390_store_status(cpu, KVM_S390_STORE_STATUS_DEF_ADDR,
+ true);
+ }
+ cpu->env.sigp_order = 0;
+ 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)
+{
+ CPUState *cs = CPU(cpu);
+ struct kvm_run *run = cs->kvm_run;
+ int ret;
+
+ cpu_synchronize_state(cs);
+
+ ret = ioinst_handle_tsch(cpu, cpu->env.regs[1], run->s390_tsch.ipb);
+ if (ret < 0) {
+ /*
+ * 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 void insert_stsi_3_2_2(S390CPU *cpu, __u64 addr, uint8_t ar)
+{
+ struct sysib_322 sysib;
+ int del;
+
+ if (s390_cpu_virt_mem_read(cpu, addr, ar, &sysib, sizeof(sysib))) {
+ return;
+ }
+ /* Shift the stack of Extended Names to prepare for our own data */
+ memmove(&sysib.ext_names[1], &sysib.ext_names[0],
+ sizeof(sysib.ext_names[0]) * (sysib.count - 1));
+ /* First virt level, that doesn't provide Ext Names delimits stack. It is
+ * assumed it's not capable of managing Extended Names for lower levels.
+ */
+ for (del = 1; del < sysib.count; del++) {
+ if (!sysib.vm[del].ext_name_encoding || !sysib.ext_names[del][0]) {
+ break;
+ }
+ }
+ if (del < sysib.count) {
+ memset(sysib.ext_names[del], 0,
+ sizeof(sysib.ext_names[0]) * (sysib.count - del));
+ }
+ /* Insert short machine name in EBCDIC, padded with blanks */
+ if (qemu_name) {
+ memset(sysib.vm[0].name, 0x40, sizeof(sysib.vm[0].name));
+ ebcdic_put(sysib.vm[0].name, qemu_name, MIN(sizeof(sysib.vm[0].name),
+ strlen(qemu_name)));
+ }
+ sysib.vm[0].ext_name_encoding = 2; /* 2 = UTF-8 */
+ memset(sysib.ext_names[0], 0, sizeof(sysib.ext_names[0]));
+ /* If hypervisor specifies zero Extended Name in STSI322 SYSIB, it's
+ * considered by s390 as not capable of providing any Extended Name.
+ * Therefore if no name was specified on qemu invocation, we go with the
+ * same "KVMguest" default, which KVM has filled into short name field.
+ */
+ if (qemu_name) {
+ strncpy((char *)sysib.ext_names[0], qemu_name,
+ sizeof(sysib.ext_names[0]));
+ } else {
+ strcpy((char *)sysib.ext_names[0], "KVMguest");
+ }
+ /* Insert UUID */
+ memcpy(sysib.vm[0].uuid, qemu_uuid, sizeof(sysib.vm[0].uuid));
+
+ s390_cpu_virt_mem_write(cpu, addr, ar, &sysib, sizeof(sysib));
+}
+
+static int handle_stsi(S390CPU *cpu)
+{
+ CPUState *cs = CPU(cpu);
+ struct kvm_run *run = cs->kvm_run;
+
+ switch (run->s390_stsi.fc) {
+ case 3:
+ if (run->s390_stsi.sel1 != 2 || run->s390_stsi.sel2 != 2) {
+ return 0;
+ }
+ /* Only sysib 3.2.2 needs post-handling for now. */
+ insert_stsi_3_2_2(cpu, run->s390_stsi.addr, run->s390_stsi.ar);
+ return 0;
+ default:
+ return 0;
+ }
+}
+
+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;
+
+ qemu_mutex_lock_iothread();
+
+ switch (run->exit_reason) {
+ case KVM_EXIT_S390_SIEIC:
+ ret = handle_intercept(cpu);
+ break;
+ case KVM_EXIT_S390_RESET:
+ s390_reipl_request();
+ break;
+ case KVM_EXIT_S390_TSCH:
+ ret = handle_tsch(cpu);
+ break;
+ case KVM_EXIT_S390_STSI:
+ ret = handle_stsi(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;
+ }
+ qemu_mutex_unlock_iothread();
+
+ 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 = 0x00400f1d40330000ULL,
+ };
+ 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_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);
+}
+
+int kvm_s390_get_memslot_count(KVMState *s)
+{
+ return kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
+}
+
+int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state)
+{
+ struct kvm_mp_state mp_state = {};
+ int ret;
+
+ /* the kvm part might not have been initialized yet */
+ if (CPU(cpu)->kvm_state == NULL) {
+ return 0;
+ }
+
+ switch (cpu_state) {
+ case CPU_STATE_STOPPED:
+ mp_state.mp_state = KVM_MP_STATE_STOPPED;
+ break;
+ case CPU_STATE_CHECK_STOP:
+ mp_state.mp_state = KVM_MP_STATE_CHECK_STOP;
+ break;
+ case CPU_STATE_OPERATING:
+ mp_state.mp_state = KVM_MP_STATE_OPERATING;
+ break;
+ case CPU_STATE_LOAD:
+ mp_state.mp_state = KVM_MP_STATE_LOAD;
+ break;
+ default:
+ error_report("Requested CPU state is not a valid S390 CPU state: %u",
+ cpu_state);
+ exit(1);
+ }
+
+ ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state);
+ if (ret) {
+ trace_kvm_failed_cpu_state_set(CPU(cpu)->cpu_index, cpu_state,
+ strerror(-ret));
+ }
+
+ return ret;
+}
+
+void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu)
+{
+ struct kvm_s390_irq_state irq_state;
+ CPUState *cs = CPU(cpu);
+ int32_t bytes;
+
+ if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) {
+ return;
+ }
+
+ irq_state.buf = (uint64_t) cpu->irqstate;
+ irq_state.len = VCPU_IRQ_BUF_SIZE;
+
+ bytes = kvm_vcpu_ioctl(cs, KVM_S390_GET_IRQ_STATE, &irq_state);
+ if (bytes < 0) {
+ cpu->irqstate_saved_size = 0;
+ error_report("Migration of interrupt state failed");
+ return;
+ }
+
+ cpu->irqstate_saved_size = bytes;
+}
+
+int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu)
+{
+ CPUState *cs = CPU(cpu);
+ struct kvm_s390_irq_state irq_state;
+ int r;
+
+ if (cpu->irqstate_saved_size == 0) {
+ return 0;
+ }
+
+ if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) {
+ return -ENOSYS;
+ }
+
+ irq_state.buf = (uint64_t) cpu->irqstate;
+ irq_state.len = cpu->irqstate_saved_size;
+
+ r = kvm_vcpu_ioctl(cs, KVM_S390_SET_IRQ_STATE, &irq_state);
+ if (r) {
+ error_report("Setting interrupt state failed %d", r);
+ }
+ return r;
+}
+
+int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
+ uint64_t address, uint32_t data)
+{
+ S390PCIBusDevice *pbdev;
+ uint32_t fid = data >> ZPCI_MSI_VEC_BITS;
+ uint32_t vec = data & ZPCI_MSI_VEC_MASK;
+
+ pbdev = s390_pci_find_dev_by_fid(fid);
+ if (!pbdev) {
+ DPRINTF("add_msi_route no dev\n");
+ return -ENODEV;
+ }
+
+ pbdev->routes.adapter.ind_offset = vec;
+
+ route->type = KVM_IRQ_ROUTING_S390_ADAPTER;
+ route->flags = 0;
+ route->u.adapter.summary_addr = pbdev->routes.adapter.summary_addr;
+ route->u.adapter.ind_addr = pbdev->routes.adapter.ind_addr;
+ route->u.adapter.summary_offset = pbdev->routes.adapter.summary_offset;
+ route->u.adapter.ind_offset = pbdev->routes.adapter.ind_offset;
+ route->u.adapter.adapter_id = pbdev->routes.adapter.adapter_id;
+ return 0;
+}
+
+int kvm_arch_msi_data_to_gsi(uint32_t data)
+{
+ abort();
+}
Code Review / kvmfornfv.git / blobdiff