#include "sysemu/device_tree.h"
#include "qapi/qmp/qjson.h"
#include "monitor/monitor.h"
+#include "exec/gdbstub.h"
+#include "trace.h"
/* #define DEBUG_KVM */
#define ICPT_CPU_STOP 0x28
#define ICPT_IO 0x40
+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
};
return 0;
}
-void kvm_arch_reset_vcpu(CPUState *cpu)
+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(cpu, KVM_S390_INITIAL_RESET, NULL)) {
+ if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL)) {
perror("Can't reset vcpu\n");
}
}
{
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 r;
int i;
/* always save the PSW and the GPRS*/
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;
+ r = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
+ if (r < 0) {
+ return r;
}
}
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;
- }
+ /*
+ * 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);
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;
+ r = kvm_set_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
+ if (r < 0) {
+ return r;
}
-
- 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;
+ r = kvm_set_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
+ if (r < 0) {
+ return r;
}
-
- 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;
+ r = kvm_set_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
+ if (r < 0) {
+ return r;
}
}
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;
+ r = kvm_vcpu_ioctl(cs, KVM_SET_SREGS, &sregs);
+ if (r < 0) {
+ return r;
}
}
{
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;
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;
- }
+ /*
+ * 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);
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, ®);
+ r = kvm_get_one_reg(cs, KVM_REG_S390_PFTOKEN, &env->pfault_token);
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, ®);
+ r = kvm_get_one_reg(cs, KVM_REG_S390_PFCOMPARE, &env->pfault_compare);
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, ®);
+ r = kvm_get_one_reg(cs, KVM_REG_S390_PFSELECT, &env->pfault_select);
if (r < 0) {
return r;
}
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)
{
- 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)) {
+ 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[4];
- static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
+ uint8_t t[sizeof(diag_501)];
- if (cpu_memory_rw_debug(cs, bp->pc, t, 4, 0)) {
+ if (cpu_memory_rw_debug(cs, bp->pc, t, sizeof(diag_501), 0)) {
return -EINVAL;
- } else if (memcmp(t, diag_501, 4)) {
+ } 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, 1, 1)) {
+ } 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)
{
}
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)
r = handle_hypercall(cpu, run);
break;
case DIAG_KVM_BREAKPOINT:
- sleep(10);
+ r = handle_sw_breakpoint(cpu, run);
break;
default:
DPRINTF("KVM: unknown DIAG: 0x%x\n", func_code);
return 0;
}
-static void handle_instruction(S390CPU *cpu, struct kvm_run *run)
+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;
}
if (r < 0) {
+ r = 0;
enter_pgmcheck(cpu, 0x0001);
}
+
+ return r;
}
static bool is_special_wait_psw(CPUState *cs)
(long)cs->kvm_run->psw_addr);
switch (icpt_code) {
case ICPT_INSTRUCTION:
- handle_instruction(cpu, run);
+ r = handle_instruction(cpu, run);
break;
case ICPT_WAITPSW:
/* disabled wait, since enabled wait is handled in kernel */
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);
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;
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);
+ 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,
projects / qemu.git / blobdiff