Merge tag 'pull-testing-gdbstub-plugins-gitdm-061022-3' of https://github.com/stsquad/qemu into staging

testing, gdbstub, plugin and gitdm updates

  - cleanup scripts/ci/setup in advance of ppc64 runner
  - ensure detected gdb reported to TCG tests
  - update hexagon container with build deps
  - move alpine container to tagged release
  - fix overflow during qos-test test tree iteration
  - allow bios blobs to be built with test cross compilers
  - introduce monitor_puts for plain strings
  - share disas code between monitor and plugins
  - fix bug in execlog plugin
  - add more tcg plugin documentation, reorg
  - fix link to semihosting spec
  - re-factor gdbstub to use AccelClass/Ops
  - many gitdm updates
  - fix race with plugin mutex lock and linux-user fork()

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* tag 'pull-testing-gdbstub-plugins-gitdm-061022-3' of https://github.com/stsquad/qemu: (52 commits)
  plugins: add [pre|post]fork helpers to linux-user
  contrib/gitdm: add Université Grenoble Alpes
  contrib/gitdm: add Simon to individual contributors
  contrib/gitdm: add China Telecom to the domain map
  contrib/gitdm: add ISCAS to the academics group
  contrib/gitdm: add WANG Xuerui to individual contributers
  contrib/gitdm: add Paul to individual contributors
  contrib/gitdm: add mapping for Loongson Technology
  accel/kvm: move kvm_update_guest_debug to inline stub
  gdbstub: move guest debug support check to ops
  gdbstub: move breakpoint logic to accel ops
  gdbstub: move sstep flags probing into AccelClass
  gdbstub: move into its own sub directory
  semihosting: update link to spec
  docs/devel: document the test plugins
  contrib/plugins: reset skip when matching in execlog
  docs/devel: move API to end of tcg-plugins.rst
  docs/devel: clean-up qemu invocations in tcg-plugins
  plugins: Assert mmu_idx in range before use in qemu_plugin_get_hwaddr
  plugins: extend execlog to filter matches
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

6 files changed, 63 insertions, 20 deletions

diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index a4b40e8391..737e750670 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -31,6 +31,7 @@ void monitor_resume(Monitor *mon);
 int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp);
 int monitor_fd_param(Monitor *mon, const char *fdname, Error **errp);
 
+int monitor_puts(Monitor *mon, const char *str);
 int monitor_vprintf(Monitor *mon, const char *fmt, va_list ap)
     G_GNUC_PRINTF(2, 0);
 int monitor_printf(Monitor *mon, const char *fmt, ...) G_GNUC_PRINTF(2, 3);
diff --git a/include/qemu/accel.h b/include/qemu/accel.h
index be56da1b99..ce4747634a 100644
--- a/include/qemu/accel.h
+++ b/include/qemu/accel.h
@@ -43,6 +43,10 @@ typedef struct AccelClass {
     bool (*has_memory)(MachineState *ms, AddressSpace *as,
                        hwaddr start_addr, hwaddr size);
 #endif
+
+    /* gdbstub related hooks */
+    int (*gdbstub_supported_sstep_flags)(void);
+
     bool *allowed;
     /*
      * Array of global properties that would be applied when specific
@@ -92,4 +96,12 @@ void accel_cpu_instance_init(CPUState *cpu);
  */
 bool accel_cpu_realizefn(CPUState *cpu, Error **errp);
 
+/**
+ * accel_supported_gdbstub_sstep_flags:
+ *
+ * Returns the supported single step modes for the configured
+ * accelerator.
+ */
+int accel_supported_gdbstub_sstep_flags(void);
+
 #endif /* QEMU_ACCEL_H */
diff --git a/include/qemu/plugin.h b/include/qemu/plugin.h
index 145f8a221a..a772e14193 100644
--- a/include/qemu/plugin.h
+++ b/include/qemu/plugin.h
@@ -224,6 +224,23 @@ void qemu_plugin_disable_mem_helpers(CPUState *cpu);
  */
 void qemu_plugin_user_exit(void);
 
+/**
+ * qemu_plugin_user_prefork_lock(): take plugin lock before forking
+ *
+ * This is a user-mode only helper to take the internal plugin lock
+ * before a fork event. This is ensure a consistent lock state
+ */
+void qemu_plugin_user_prefork_lock(void);
+
+/**
+ * qemu_plugin_user_postfork(): reset the plugin lock
+ * @is_child: is this thread the child
+ *
+ * This user-mode only helper resets the lock state after a fork so we
+ * can continue using the plugin interface.
+ */
+void qemu_plugin_user_postfork(bool is_child);
+
 #else /* !CONFIG_PLUGIN */
 
 static inline void qemu_plugin_add_opts(void)
@@ -287,6 +304,13 @@ static inline void qemu_plugin_disable_mem_helpers(CPUState *cpu)
 
 static inline void qemu_plugin_user_exit(void)
 { }
+
+static inline void qemu_plugin_user_prefork_lock(void)
+{ }
+
+static inline void qemu_plugin_user_postfork(bool is_child)
+{ }
+
 #endif /* !CONFIG_PLUGIN */
 
 #endif /* QEMU_PLUGIN_H */
diff --git a/include/sysemu/accel-ops.h b/include/sysemu/accel-ops.h
index a0572ea87a..8cc7996def 100644
--- a/include/sysemu/accel-ops.h
+++ b/include/sysemu/accel-ops.h
@@ -10,6 +10,7 @@
 #ifndef ACCEL_OPS_H
 #define ACCEL_OPS_H
 
+#include "exec/hwaddr.h"
 #include "qom/object.h"
 
 #define ACCEL_OPS_SUFFIX "-ops"
@@ -44,6 +45,12 @@ struct AccelOpsClass {
 
     int64_t (*get_virtual_clock)(void);
     int64_t (*get_elapsed_ticks)(void);
+
+    /* gdbstub hooks */
+    bool (*supports_guest_debug)(void);
+    int (*insert_breakpoint)(CPUState *cpu, int type, hwaddr addr, hwaddr len);
+    int (*remove_breakpoint)(CPUState *cpu, int type, hwaddr addr, hwaddr len);
+    void (*remove_all_breakpoints)(CPUState *cpu);
 };
 
 #endif /* ACCEL_OPS_H */
diff --git a/include/sysemu/cpus.h b/include/sysemu/cpus.h
index b5c87d48b3..1bace3379b 100644
--- a/include/sysemu/cpus.h
+++ b/include/sysemu/cpus.h
@@ -7,6 +7,9 @@
 /* register accel-specific operations */
 void cpus_register_accel(const AccelOpsClass *i);
 
+/* return registers ops */
+const AccelOpsClass *cpus_get_accel(void);
+
 /* accel/dummy-cpus.c */
 
 /* Create a dummy vcpu for AccelOpsClass->create_vcpu_thread */
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index efd6dee818..790d35ef78 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -46,8 +46,6 @@ extern bool kvm_readonly_mem_allowed;
 extern bool kvm_direct_msi_allowed;
 extern bool kvm_ioeventfd_any_length_allowed;
 extern bool kvm_msi_use_devid;
-extern bool kvm_has_guest_debug;
-extern int kvm_sstep_flags;
 
 #define kvm_enabled()           (kvm_allowed)
 /**
@@ -169,17 +167,6 @@ extern int kvm_sstep_flags;
  */
 #define kvm_msi_devid_required() (kvm_msi_use_devid)
 
-/*
- * Does KVM support guest debugging
- */
-#define kvm_supports_guest_debug() (kvm_has_guest_debug)
-
-/*
- * kvm_supported_sstep_flags
- * Returns: SSTEP_* flags that KVM supports for guest debug
- */
-#define kvm_get_supported_sstep_flags() (kvm_sstep_flags)
-
 #else
 
 #define kvm_enabled()           (0)
@@ -197,8 +184,6 @@ extern int kvm_sstep_flags;
 #define kvm_direct_msi_enabled() (false)
 #define kvm_ioeventfd_any_length_enabled() (false)
 #define kvm_msi_devid_required() (false)
-#define kvm_supports_guest_debug() (false)
-#define kvm_get_supported_sstep_flags() (0)
 
 #endif  /* CONFIG_KVM_IS_POSSIBLE */
 
@@ -262,12 +247,23 @@ int kvm_on_sigbus(int code, void *addr);
 
 void kvm_flush_coalesced_mmio_buffer(void);
 
-int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
-                          target_ulong len, int type);
-int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
-                          target_ulong len, int type);
-void kvm_remove_all_breakpoints(CPUState *cpu);
+/**
+ * kvm_update_guest_debug(): ensure KVM debug structures updated
+ * @cs: the CPUState for this cpu
+ * @reinject_trap: KVM trap injection control
+ *
+ * There are usually per-arch specifics which will be handled by
+ * calling down to kvm_arch_update_guest_debug after the generic
+ * fields have been set.
+ */
+#ifdef KVM_CAP_SET_GUEST_DEBUG
 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap);
+#else
+static inline int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
+{
+    return -EINVAL;
+}
+#endif
 
 /* internal API */