Merge tag 'mem-2022-10-28' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Fix NVDIMM error message
- Add ThreadContext user-creatable object and wire it up for NUMA-aware
  hostmem preallocation

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# gpg: Signature made Fri 28 Oct 2022 05:44:16 EDT
# gpg:                using RSA key 1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A
# gpg:                issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [unknown]
# gpg:                 aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg:                 aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D  FCCA 4DDE 10F7 00FF 835A

* tag 'mem-2022-10-28' of https://github.com/davidhildenbrand/qemu:
  vl: Allow ThreadContext objects to be created before the sandbox option
  hostmem: Allow for specifying a ThreadContext for preallocation
  util: Make qemu_prealloc_mem() optionally consume a ThreadContext
  util: Add write-only "node-affinity" property for ThreadContext
  util: Introduce ThreadContext user-creatable object
  util: Introduce qemu_thread_set_affinity() and qemu_thread_get_affinity()
  util: Cleanup and rename os_mem_prealloc()
  hw/mem/nvdimm: fix error message for 'unarmed' flag

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

1 files changed, 57 insertions, 0 deletions

diff --git a/include/qemu/thread-context.h b/include/qemu/thread-context.h
new file mode 100644
index 0000000000..2ebd6b7fe1
--- /dev/null
+++ b/include/qemu/thread-context.h
@@ -0,0 +1,57 @@
+/*
+ * QEMU Thread Context
+ *
+ * Copyright Red Hat Inc., 2022
+ *
+ * Authors:
+ *  David Hildenbrand <david@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef SYSEMU_THREAD_CONTEXT_H
+#define SYSEMU_THREAD_CONTEXT_H
+
+#include "qapi/qapi-types-machine.h"
+#include "qemu/thread.h"
+#include "qom/object.h"
+
+#define TYPE_THREAD_CONTEXT "thread-context"
+OBJECT_DECLARE_TYPE(ThreadContext, ThreadContextClass,
+                    THREAD_CONTEXT)
+
+struct ThreadContextClass {
+    ObjectClass parent_class;
+};
+
+struct ThreadContext {
+    /* private */
+    Object parent;
+
+    /* private */
+    unsigned int thread_id;
+    QemuThread thread;
+
+    /* Semaphore to wait for context thread action. */
+    QemuSemaphore sem;
+    /* Semaphore to wait for action in context thread. */
+    QemuSemaphore sem_thread;
+    /* Mutex to synchronize requests. */
+    QemuMutex mutex;
+
+    /* Commands for the thread to execute. */
+    int thread_cmd;
+    void *thread_cmd_data;
+
+    /* CPU affinity bitmap used for initialization. */
+    unsigned long *init_cpu_bitmap;
+    int init_cpu_nbits;
+};
+
+void thread_context_create_thread(ThreadContext *tc, QemuThread *thread,
+                                  const char *name,
+                                  void *(*start_routine)(void *), void *arg,
+                                  int mode);
+
+#endif /* SYSEMU_THREAD_CONTEXT_H */