So far, the DIAG 500 hypervisor call was only setting -EINVAL in R2 when a guest tried to call this function with an illegal subcode. This patch now changes the behavior so that a specification exception is thrown instead, since this is the common behavior of other DIAG functions (and other CPU instructions) when being called with illegal parameters. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
921 lines
25 KiB
C
921 lines
25 KiB
C
/*
|
|
* 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/timer.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include "sysemu/kvm.h"
|
|
#include "cpu.h"
|
|
#include "sysemu/device_tree.h"
|
|
#include "qapi/qmp/qjson.h"
|
|
#include "monitor/monitor.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 IPA0_DIAG 0x8300
|
|
#define IPA0_SIGP 0xae00
|
|
#define IPA0_B2 0xb200
|
|
#define IPA0_B9 0xb900
|
|
#define IPA0_EB 0xeb00
|
|
|
|
#define PRIV_SCLP_CALL 0x20
|
|
#define PRIV_CSCH 0x30
|
|
#define PRIV_HSCH 0x31
|
|
#define PRIV_MSCH 0x32
|
|
#define PRIV_SSCH 0x33
|
|
#define PRIV_STSCH 0x34
|
|
#define PRIV_TSCH 0x35
|
|
#define PRIV_TPI 0x36
|
|
#define PRIV_SAL 0x37
|
|
#define PRIV_RSCH 0x38
|
|
#define PRIV_STCRW 0x39
|
|
#define PRIV_STCPS 0x3a
|
|
#define PRIV_RCHP 0x3b
|
|
#define PRIV_SCHM 0x3c
|
|
#define PRIV_CHSC 0x5f
|
|
#define PRIV_SIGA 0x74
|
|
#define PRIV_XSCH 0x76
|
|
#define PRIV_SQBS 0x8a
|
|
#define PRIV_EQBS 0x9c
|
|
#define DIAG_IPL 0x308
|
|
#define DIAG_KVM_HYPERCALL 0x500
|
|
#define DIAG_KVM_BREAKPOINT 0x501
|
|
|
|
#define ICPT_INSTRUCTION 0x04
|
|
#define ICPT_WAITPSW 0x1c
|
|
#define ICPT_SOFT_INTERCEPT 0x24
|
|
#define ICPT_CPU_STOP 0x28
|
|
#define ICPT_IO 0x40
|
|
|
|
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
|
|
KVM_CAP_LAST_INFO
|
|
};
|
|
|
|
static int cap_sync_regs;
|
|
static int cap_async_pf;
|
|
|
|
static void *legacy_s390_alloc(size_t size);
|
|
|
|
int kvm_arch_init(KVMState *s)
|
|
{
|
|
cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
|
|
cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
|
|
if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
|
|
|| !kvm_check_extension(s, KVM_CAP_S390_COW)) {
|
|
phys_mem_set_alloc(legacy_s390_alloc);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
unsigned long kvm_arch_vcpu_id(CPUState *cpu)
|
|
{
|
|
return cpu->cpu_index;
|
|
}
|
|
|
|
int kvm_arch_init_vcpu(CPUState *cpu)
|
|
{
|
|
/* nothing todo yet */
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_reset_vcpu(CPUState *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(cpu, KVM_S390_INITIAL_RESET, NULL)) {
|
|
perror("Can't reset vcpu\n");
|
|
}
|
|
}
|
|
|
|
int kvm_arch_put_registers(CPUState *cs, int level)
|
|
{
|
|
S390CPU *cpu = S390_CPU(cs);
|
|
CPUS390XState *env = &cpu->env;
|
|
struct kvm_one_reg reg;
|
|
struct kvm_sregs sregs;
|
|
struct kvm_regs regs;
|
|
int ret;
|
|
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 (cap_sync_regs && cs->kvm_run->kvm_valid_regs & 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];
|
|
}
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Do we need to save more than that? */
|
|
if (level == KVM_PUT_RUNTIME_STATE) {
|
|
return 0;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_CPU_TIMER;
|
|
reg.addr = (__u64)&(env->cputm);
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_CLOCK_COMP;
|
|
reg.addr = (__u64)&(env->ckc);
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_TODPR;
|
|
reg.addr = (__u64)&(env->todpr);
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
if (cap_async_pf) {
|
|
reg.id = KVM_REG_S390_PFTOKEN;
|
|
reg.addr = (__u64)&(env->pfault_token);
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_PFCOMPARE;
|
|
reg.addr = (__u64)&(env->pfault_compare);
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_PFSELECT;
|
|
reg.addr = (__u64)&(env->pfault_select);
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (cap_sync_regs &&
|
|
cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS &&
|
|
cs->kvm_run->kvm_valid_regs & 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];
|
|
}
|
|
ret = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Finally the prefix */
|
|
if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & 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_one_reg reg;
|
|
struct kvm_sregs sregs;
|
|
struct kvm_regs regs;
|
|
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 (cap_sync_regs && cs->kvm_run->kvm_valid_regs & 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 (cap_sync_regs &&
|
|
cs->kvm_run->kvm_valid_regs & KVM_SYNC_ACRS &&
|
|
cs->kvm_run->kvm_valid_regs & 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];
|
|
}
|
|
}
|
|
|
|
/* The prefix */
|
|
if (cap_sync_regs && cs->kvm_run->kvm_valid_regs & KVM_SYNC_PREFIX) {
|
|
env->psa = cs->kvm_run->s.regs.prefix;
|
|
}
|
|
|
|
/* One Regs */
|
|
reg.id = KVM_REG_S390_CPU_TIMER;
|
|
reg.addr = (__u64)&(env->cputm);
|
|
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_CLOCK_COMP;
|
|
reg.addr = (__u64)&(env->ckc);
|
|
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_TODPR;
|
|
reg.addr = (__u64)&(env->todpr);
|
|
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
if (cap_async_pf) {
|
|
reg.id = KVM_REG_S390_PFTOKEN;
|
|
reg.addr = (__u64)&(env->pfault_token);
|
|
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_PFCOMPARE;
|
|
reg.addr = (__u64)&(env->pfault_compare);
|
|
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
reg.id = KVM_REG_S390_PFSELECT;
|
|
reg.addr = (__u64)&(env->pfault_select);
|
|
r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
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;
|
|
}
|
|
|
|
int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
|
|
{
|
|
static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
|
|
|
|
if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) ||
|
|
cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501, 4, 1)) {
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
|
|
{
|
|
uint8_t t[4];
|
|
static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
|
|
|
|
if (cpu_memory_rw_debug(cs, bp->pc, t, 4, 0)) {
|
|
return -EINVAL;
|
|
} else if (memcmp(t, diag_501, 4)) {
|
|
return -EINVAL;
|
|
} else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void kvm_s390_interrupt_internal(S390CPU *cpu, int type, uint32_t parm,
|
|
uint64_t parm64, int vm)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
struct kvm_s390_interrupt kvmint;
|
|
int r;
|
|
|
|
if (!cs->kvm_state) {
|
|
return;
|
|
}
|
|
|
|
kvmint.type = type;
|
|
kvmint.parm = parm;
|
|
kvmint.parm64 = parm64;
|
|
|
|
if (vm) {
|
|
r = kvm_vm_ioctl(cs->kvm_state, KVM_S390_INTERRUPT, &kvmint);
|
|
} else {
|
|
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_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
|
|
{
|
|
kvm_s390_interrupt_internal(cpu, KVM_S390_INT_VIRTIO, config_change,
|
|
token, 1);
|
|
}
|
|
|
|
void kvm_s390_interrupt(S390CPU *cpu, int type, uint32_t code)
|
|
{
|
|
kvm_s390_interrupt_internal(cpu, type, code, 0, 0);
|
|
}
|
|
|
|
static void enter_pgmcheck(S390CPU *cpu, uint16_t code)
|
|
{
|
|
kvm_s390_interrupt(cpu, KVM_S390_PROGRAM_INT, code);
|
|
}
|
|
|
|
static int kvm_sclp_service_call(S390CPU *cpu, struct kvm_run *run,
|
|
uint16_t ipbh0)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
uint32_t sccb;
|
|
uint64_t code;
|
|
int r = 0;
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
if (env->psw.mask & PSW_MASK_PSTATE) {
|
|
enter_pgmcheck(cpu, PGM_PRIVILEGED);
|
|
return 0;
|
|
}
|
|
sccb = env->regs[ipbh0 & 0xf];
|
|
code = env->regs[(ipbh0 & 0xf0) >> 4];
|
|
|
|
r = sclp_service_call(sccb, code);
|
|
if (r < 0) {
|
|
enter_pgmcheck(cpu, -r);
|
|
}
|
|
setcc(cpu, r);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_handle_css_inst(S390CPU *cpu, struct kvm_run *run,
|
|
uint8_t ipa0, uint8_t ipa1, uint8_t ipb)
|
|
{
|
|
CPUS390XState *env = &cpu->env;
|
|
|
|
if (ipa0 != 0xb2) {
|
|
/* Not handled for now. */
|
|
return -1;
|
|
}
|
|
|
|
cpu_synchronize_state(CPU(cpu));
|
|
|
|
switch (ipa1) {
|
|
case PRIV_XSCH:
|
|
ioinst_handle_xsch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_CSCH:
|
|
ioinst_handle_csch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_HSCH:
|
|
ioinst_handle_hsch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_MSCH:
|
|
ioinst_handle_msch(cpu, env->regs[1], run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_SSCH:
|
|
ioinst_handle_ssch(cpu, env->regs[1], run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_STCRW:
|
|
ioinst_handle_stcrw(cpu, run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_STSCH:
|
|
ioinst_handle_stsch(cpu, env->regs[1], run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_TSCH:
|
|
/* We should only get tsch via KVM_EXIT_S390_TSCH. */
|
|
fprintf(stderr, "Spurious tsch intercept\n");
|
|
break;
|
|
case PRIV_CHSC:
|
|
ioinst_handle_chsc(cpu, run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_TPI:
|
|
/* This should have been handled by kvm already. */
|
|
fprintf(stderr, "Spurious tpi intercept\n");
|
|
break;
|
|
case PRIV_SCHM:
|
|
ioinst_handle_schm(cpu, env->regs[1], env->regs[2],
|
|
run->s390_sieic.ipb);
|
|
break;
|
|
case PRIV_RSCH:
|
|
ioinst_handle_rsch(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_RCHP:
|
|
ioinst_handle_rchp(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_STCPS:
|
|
/* We do not provide this instruction, it is suppressed. */
|
|
break;
|
|
case PRIV_SAL:
|
|
ioinst_handle_sal(cpu, env->regs[1]);
|
|
break;
|
|
case PRIV_SIGA:
|
|
/* Not provided, set CC = 3 for subchannel not operational */
|
|
setcc(cpu, 3);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_priv(S390CPU *cpu, struct kvm_run *run,
|
|
uint8_t ipa0, uint8_t ipa1)
|
|
{
|
|
int r = 0;
|
|
uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
|
|
uint8_t ipb = run->s390_sieic.ipb & 0xff;
|
|
|
|
DPRINTF("KVM: PRIV: %d\n", ipa1);
|
|
switch (ipa1) {
|
|
case PRIV_SCLP_CALL:
|
|
r = kvm_sclp_service_call(cpu, run, ipbh0);
|
|
break;
|
|
default:
|
|
r = kvm_handle_css_inst(cpu, run, ipa0, ipa1, ipb);
|
|
if (r == -1) {
|
|
DPRINTF("KVM: unhandled PRIV: 0x%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);
|
|
}
|
|
|
|
#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:
|
|
sleep(10);
|
|
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)
|
|
{
|
|
kvm_s390_interrupt(cpu, KVM_S390_RESTART, 0);
|
|
s390_add_running_cpu(cpu);
|
|
qemu_cpu_kick(CPU(cpu));
|
|
DPRINTF("DONE: KVM cpu restart: %p\n", &cpu->env);
|
|
return 0;
|
|
}
|
|
|
|
static int s390_cpu_initial_reset(S390CPU *cpu)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
CPUS390XState *env = &cpu->env;
|
|
int i;
|
|
|
|
s390_del_running_cpu(cpu);
|
|
if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL) < 0) {
|
|
perror("cannot init reset vcpu");
|
|
}
|
|
|
|
/* Manually zero out all registers */
|
|
cpu_synchronize_state(cs);
|
|
for (i = 0; i < 16; i++) {
|
|
env->regs[i] = 0;
|
|
}
|
|
|
|
DPRINTF("DONE: SIGP initial reset: %p\n", env);
|
|
return 0;
|
|
}
|
|
|
|
#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:
|
|
cc = s390_cpu_initial_reset(target_cpu);
|
|
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 void 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:
|
|
case IPA0_B9:
|
|
case IPA0_EB:
|
|
r = handle_priv(cpu, run, ipa0 >> 8, 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) {
|
|
enter_pgmcheck(cpu, 0x0001);
|
|
}
|
|
}
|
|
|
|
static bool is_special_wait_psw(CPUState *cs)
|
|
{
|
|
/* signal quiesce */
|
|
return cs->kvm_run->psw_addr == 0xfffUL;
|
|
}
|
|
|
|
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:
|
|
handle_instruction(cpu, run);
|
|
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 {
|
|
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);
|
|
}
|
|
}
|
|
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) {
|
|
uint16_t subchannel_id = run->s390_tsch.subchannel_id;
|
|
uint16_t subchannel_nr = run->s390_tsch.subchannel_nr;
|
|
uint32_t io_int_parm = run->s390_tsch.io_int_parm;
|
|
uint32_t io_int_word = run->s390_tsch.io_int_word;
|
|
uint32_t type = ((subchannel_id & 0xff00) << 24) |
|
|
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
|
|
|
|
kvm_s390_interrupt_internal(cpu, type,
|
|
((uint32_t)subchannel_id << 16)
|
|
| subchannel_nr,
|
|
((uint64_t)io_int_parm << 32)
|
|
| io_int_word, 1);
|
|
}
|
|
ret = 0;
|
|
}
|
|
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;
|
|
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(S390CPU *cpu, uint16_t subchannel_id,
|
|
uint16_t subchannel_nr, uint32_t io_int_parm,
|
|
uint32_t io_int_word)
|
|
{
|
|
uint32_t type;
|
|
|
|
type = ((subchannel_id & 0xff00) << 24) |
|
|
((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
|
|
kvm_s390_interrupt_internal(cpu, type,
|
|
((uint32_t)subchannel_id << 16) | subchannel_nr,
|
|
((uint64_t)io_int_parm << 32) | io_int_word, 1);
|
|
}
|
|
|
|
void kvm_s390_crw_mchk(S390CPU *cpu)
|
|
{
|
|
kvm_s390_interrupt_internal(cpu, KVM_S390_MCHK, 1 << 28,
|
|
0x00400f1d40330000, 1);
|
|
}
|
|
|
|
void kvm_s390_enable_css_support(S390CPU *cpu)
|
|
{
|
|
struct kvm_enable_cap cap = {};
|
|
int r;
|
|
|
|
/* Activate host kernel channel subsystem support. */
|
|
cap.cap = KVM_CAP_S390_CSS_SUPPORT;
|
|
r = kvm_vcpu_ioctl(CPU(cpu), KVM_ENABLE_CAP, &cap);
|
|
assert(r == 0);
|
|
}
|
|
|
|
void kvm_arch_init_irq_routing(KVMState *s)
|
|
{
|
|
}
|
|
|
|
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);
|
|
}
|