system: Extract QMP memsave/pmemsave commands to physmem-qmp-cmds.c

Keep cpus.c related to vCPU scheduling, move the QMP handlers
related to dumping physical memory to file to their own unit.
Fix a pair of checkpatch.pl errors doing so:

  ERROR: braces {} are necessary for all arms of this statement
  #185: FILE: system/physmem-qmp-cmds.c:51:
  +        if (l > size)
  [...]

Signed-off-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20260812211708.92824-16-philmd@oss.qualcomm.com>

3 files changed, 108 insertions, 92 deletions

diff --git a/system/cpus.c b/system/cpus.c
index aa2510bf8f..43ff10cf00 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -25,9 +25,7 @@
 #include "qemu/osdep.h"
 #include "qemu/coroutine-tls.h"
 #include "qapi/error.h"
-#include "qapi/qapi-commands-machine.h"
 #include "qapi/qapi-events-run-state.h"
-#include "qapi/qmp/qerror.h"
 #include "exec/gdbstub.h"
 #include "accel/accel-cpu-ops.h"
 #include "system/hw_accel.h"
@@ -40,7 +38,6 @@
 #include "system/physmem.h"
 #include "system/replay.h"
 #include "system/runstate.h"
-#include "migration/misc.h"
 #include "system/cpu-timers.h"
 #include "system/whpx.h"
 #include "hw/core/boards.h"
@@ -831,92 +828,3 @@ int vm_stop_force_state(RunState state)
         return ret;
     }
 }
-
-void qmp_memsave(uint64_t addr, uint64_t size, const char *filename,
-                 bool has_cpu, int64_t cpu_index, Error **errp)
-{
-    FILE *f;
-    uint64_t l;
-    CPUState *cpu;
-    uint8_t buf[1024];
-    uint64_t orig_addr = addr, orig_size = size;
-
-    if (migration_guest_ram_loading()) {
-        error_setg(errp, "Guest memory access not allowed during migration");
-        return;
-    }
-
-    if (!has_cpu) {
-        cpu_index = 0;
-    }
-
-    cpu = qemu_get_cpu(cpu_index);
-    if (cpu == NULL) {
-        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index",
-                   "a CPU number");
-        return;
-    }
-
-    f = fopen(filename, "wb");
-    if (!f) {
-        error_setg_file_open(errp, errno, filename);
-        return;
-    }
-
-    while (size != 0) {
-        l = sizeof(buf);
-        if (l > size)
-            l = size;
-        if (cpu_memory_rw_debug(cpu, addr, buf, l, 0) != 0) {
-            error_setg(errp, "Invalid addr 0x%016" PRIx64 "/size %" PRIu64
-                             " specified", orig_addr, orig_size);
-            goto exit;
-        }
-        if (fwrite(buf, 1, l, f) != l) {
-            error_setg(errp, "writing memory to '%s' failed",
-                       filename);
-            goto exit;
-        }
-        addr += l;
-        size -= l;
-    }
-
-exit:
-    fclose(f);
-}
-
-void qmp_pmemsave(uint64_t addr, uint64_t size, const char *filename,
-                  Error **errp)
-{
-    FILE *f;
-    uint64_t l;
-    uint8_t buf[1024];
-
-    if (migration_guest_ram_loading()) {
-        error_setg(errp, "Guest memory access not allowed during migration");
-        return;
-    }
-
-    f = fopen(filename, "wb");
-    if (!f) {
-        error_setg_file_open(errp, errno, filename);
-        return;
-    }
-
-    while (size != 0) {
-        l = sizeof(buf);
-        if (l > size)
-            l = size;
-        physical_memory_read(addr, buf, l);
-        if (fwrite(buf, 1, l, f) != l) {
-            error_setg(errp, "writing memory to '%s' failed",
-                       filename);
-            goto exit;
-        }
-        addr += l;
-        size -= l;
-    }
-
-exit:
-    fclose(f);
-}
diff --git a/system/meson.build b/system/meson.build
index 377adce803..64e06e7abc 100644
--- a/system/meson.build
+++ b/system/meson.build
@@ -19,6 +19,7 @@ system_ss.add(files(
   'memory_mapping.c',
   'memory.c',
   'physmem.c',
+  'physmem-qmp-cmds.c',
   'qdev-monitor.c',
   'qtest.c',
   'rtc.c',
diff --git a/system/physmem-qmp-cmds.c b/system/physmem-qmp-cmds.c
new file mode 100644
index 0000000000..d85430357d
--- /dev/null
+++ b/system/physmem-qmp-cmds.c
@@ -0,0 +1,107 @@
+/*
+ * QMP commands to dump physical memory
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-machine.h"
+#include "qapi/qmp/qerror.h"
+#include "hw/core/cpu.h"
+#include "system/physmem.h"
+#include "migration/misc.h"
+
+void qmp_memsave(uint64_t addr, uint64_t size, const char *filename,
+                 bool has_cpu, int64_t cpu_index, Error **errp)
+{
+    FILE *f;
+    uint64_t l;
+    CPUState *cpu;
+    uint8_t buf[1024];
+    uint64_t orig_addr = addr, orig_size = size;
+
+    if (migration_guest_ram_loading()) {
+        error_setg(errp, "Guest memory access not allowed during migration");
+        return;
+    }
+
+    if (!has_cpu) {
+        cpu_index = 0;
+    }
+
+    cpu = qemu_get_cpu(cpu_index);
+    if (cpu == NULL) {
+        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cpu-index",
+                   "a CPU number");
+        return;
+    }
+
+    f = fopen(filename, "wb");
+    if (!f) {
+        error_setg_file_open(errp, errno, filename);
+        return;
+    }
+
+    while (size != 0) {
+        l = sizeof(buf);
+        if (l > size) {
+            l = size;
+        }
+        if (cpu_memory_rw_debug(cpu, addr, buf, l, 0) != 0) {
+            error_setg(errp, "Invalid addr 0x%016" PRIx64 "/size %" PRIu64
+                             " specified", orig_addr, orig_size);
+            goto exit;
+        }
+        if (fwrite(buf, 1, l, f) != l) {
+            error_setg(errp, "writing memory to '%s' failed",
+                       filename);
+            goto exit;
+        }
+        addr += l;
+        size -= l;
+    }
+
+exit:
+    fclose(f);
+}
+
+void qmp_pmemsave(uint64_t addr, uint64_t size, const char *filename,
+                  Error **errp)
+{
+    FILE *f;
+    uint64_t l;
+    uint8_t buf[1024];
+
+    if (migration_guest_ram_loading()) {
+        error_setg(errp, "Guest memory access not allowed during migration");
+        return;
+    }
+
+    f = fopen(filename, "wb");
+    if (!f) {
+        error_setg_file_open(errp, errno, filename);
+        return;
+    }
+
+    while (size != 0) {
+        l = sizeof(buf);
+        if (l > size) {
+            l = size;
+        }
+        physical_memory_read(addr, buf, l);
+        if (fwrite(buf, 1, l, f) != l) {
+            error_setg(errp, "writing memory to '%s' failed",
+                       filename);
+            goto exit;
+        }
+        addr += l;
+        size -= l;
+    }
+
+exit:
+    fclose(f);
+}