[PATCH v9 09/26] target/arm/cpu_idregs: generate tables for Arm64 ID registers and fields

[Eric Auger <eric.auger@redhat.com>]

From: Shaju Abraham <shaju.abraham@nutanix.com>

Include cpu-idregs.h.inc multiple times with different definitions for the
X-macros. This will generate tables for all Arm64 ID registers and their
fields. Additionally, initialize the tables with all architecturally defined
values. These tables will be consumed by the property layer in future
patches.

Note:
This triggers a minot checkpatch error but I prefer to keep the coma in
the macro.
ERROR: Macros with complex values should be enclosed in parenthesis
+#define IDREG_FIELD_ARCH_VAL(v) (v),

Co-authored-by: Khushit Shah <khushit.shah@nutanix.com>
Signed-off-by: Khushit Shah <khushit.shah@nutanix.com>
Signed-off-by: Shaju Abraham <shaju.abraham@nutanix.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>

---
v7 -> v8
Adaptation after removal of struct ArmIdRegArchVal

v5 -> v6
- restored support of enum values
---
 target/arm/cpu-idregs.c | 96 +++++++++++++++++++++++++++++++++++++++++
 target/arm/meson.build  |  1 +
 2 files changed, 97 insertions(+)
 create mode 100644 target/arm/cpu-idregs.c

diff --git a/target/arm/cpu-idregs.c b/target/arm/cpu-idregs.c
new file mode 100644
index 0000000000..199d593153
--- /dev/null
+++ b/target/arm/cpu-idregs.c
@@ -0,0 +1,96 @@
+/*
+ *   ARM ID register field table.
+ *
+ *   Builds the per-id-register field descriptor arrays and the global
+ *   arm_idregs[] table.
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qapi/error.h"
+#include "cpu.h"
+#include "cpu-idregs.h"
+
+/*
+ * Generate an array of architecturely defined values for each field
+ * associated with enum values
+ */
+
+#define IDREG_START(reg)
+#define IDREG_END(reg)
+#define IDREG_FIELD(reg, field, shift, length)
+#define IDREG_FIELD_START(reg, field, shift, length) \
+    static const uint64_t reg##_##field##_arch_vals[] = {
+#define IDREG_FIELD_ARCH_VAL(v) (v),
+#define IDREG_FIELD_END(reg, field) \
+    };
+
+#include "cpu-idregs.h.inc"
+
+#undef IDREG_START
+#undef IDREG_END
+#undef IDREG_FIELD
+#undef IDREG_FIELD_START
+#undef IDREG_FIELD_END
+#undef IDREG_FIELD_ARCH_VAL
+
+/* generate an array of per-register ArmIdRegField[] descriptors */
+
+#define IDREG_START(reg) \
+    static ARM64SysRegField reg##_fields[] = {
+
+#define IDREG_END(reg) \
+    };
+
+#define IDREG_FIELD_START(reg, field, _shift, _length)  \
+    {                                                                 \
+        .name = #field, \
+        .index = reg##_IDX, \
+        .shift = (_shift),                                            \
+        .length = (_length),                                          \
+        .arch_vals = (uint64_t *)reg##_##field##_arch_vals,    \
+        .arch_vals_count = ARRAY_SIZE(reg##_##field##_arch_vals),     \
+    },
+
+#define IDREG_FIELD(reg, field, _shift, _length) \
+    { \
+        .name = #field, \
+        .index = reg##_IDX, \
+        .shift = (_shift), \
+        .length = (_length), \
+    },
+
+#define IDREG_FIELD_ARCH_VAL(v)
+
+#define IDREG_FIELD_END(reg, field)
+
+#include "cpu-idregs.h.inc"
+
+#undef IDREG_START
+#undef IDREG_END
+#undef IDREG_FIELD
+#undef IDREG_FIELD_START
+#undef IDREG_FIELD_END
+#undef IDREG_FIELD_ARCH_VAL
+
+/* generate an array of top level ID registers */
+
+#define IDREG_END(reg)
+#define IDREG_FIELD(reg, field, shift, length)
+#define IDREG_FIELD_START(reg, field, shift, length)
+#define IDREG_FIELD_ARCH_VAL(v)
+#define IDREG_FIELD_END(reg, field)
+
+#define IDREG_START(reg) \
+    [reg##_IDX] = { \
+        .name = #reg, \
+        .index = reg##_IDX, \
+        .fields = reg##_fields, \
+        .fields_count = ARRAY_SIZE(reg##_fields), \
+    },
+
+ARM64SysReg arm64_id_regs[NUM_ID_IDX] = {
+#include "cpu-idregs.h.inc"
+};
+
diff --git a/target/arm/meson.build b/target/arm/meson.build
index 0369f96b4c..384d90c530 100644
--- a/target/arm/meson.build
+++ b/target/arm/meson.build
@@ -30,6 +30,7 @@ arm_common_user_system_ss.add(when: 'TARGET_AARCH64', if_true: files(
 
 arm_common_system_ss.add(files(
   'arm-qmp-cmds.c',
+  'cpu-idregs.c',
 ))
 arm_system_ss.add(when: 'CONFIG_KVM', if_true: files('hyp_gdbstub.c', 'kvm.c'))
 arm_system_ss.add(when: 'CONFIG_HVF', if_true: files('hyp_gdbstub.c'))
-- 
2.53.0