From 2bdf07593dbec66205f2f20fa5430595678ded89 Mon Sep 17 00:00:00 2001
From: hanliyang <hanliyang@hygon.cn>
Date: Thu, 14 Mar 2024 19:21:11 +0800
Subject: [PATCH] target/i386: Introduce header file csv.h

This header file is used to provide common helper functions
and data structures for Hygon CSV.

Signed-off-by: hanliyang <hanliyang@hygon.cn>
---
 configs/devices/i386-softmmu/default.mak |  1 +
 hw/i386/Kconfig                          |  5 +++
 target/i386/csv.h                        | 47 ++++++++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 target/i386/csv.h

diff --git a/configs/devices/i386-softmmu/default.mak b/configs/devices/i386-softmmu/default.mak
index 598c6646df..db83ffcab9 100644
--- a/configs/devices/i386-softmmu/default.mak
+++ b/configs/devices/i386-softmmu/default.mak
@@ -23,6 +23,7 @@
 #CONFIG_TPM_TIS_ISA=n
 #CONFIG_VTD=n
 #CONFIG_SGX=n
+#CONFIG_CSV=n
 
 # Boards:
 #
diff --git a/hw/i386/Kconfig b/hw/i386/Kconfig
index 55850791df..08f3ae43f8 100644
--- a/hw/i386/Kconfig
+++ b/hw/i386/Kconfig
@@ -10,6 +10,10 @@ config SGX
     bool
     depends on KVM
 
+config CSV
+    bool
+    depends on SEV
+
 config PC
     bool
     imply APPLESMC
@@ -26,6 +30,7 @@ config PC
     imply QXL
     imply SEV
     imply SGX
+    imply CSV
     imply TEST_DEVICES
     imply TPM_CRB
     imply TPM_TIS_ISA
diff --git a/target/i386/csv.h b/target/i386/csv.h
new file mode 100644
index 0000000000..f935babe97
--- /dev/null
+++ b/target/i386/csv.h
@@ -0,0 +1,47 @@
+/*
+ * QEMU CSV support
+ *
+ * Copyright: Hygon Info Technologies Ltd. 2022
+ *
+ * Author:
+ *      Jiang Xin <jiangxin@hygon.cn>
+ *
+ * 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 I386_CSV_H
+#define I386_CSV_H
+
+#ifdef CONFIG_CSV
+
+#include "cpu.h"
+
+#define CPUID_VENDOR_HYGON_EBX   0x6f677948  /* "Hygo" */
+#define CPUID_VENDOR_HYGON_ECX   0x656e6975  /* "uine" */
+#define CPUID_VENDOR_HYGON_EDX   0x6e65476e  /* "nGen" */
+
+static bool __attribute__((unused)) is_hygon_cpu(void)
+{
+    uint32_t ebx = 0;
+    uint32_t ecx = 0;
+    uint32_t edx = 0;
+
+    host_cpuid(0, 0, NULL, &ebx, &ecx, &edx);
+
+    if (ebx == CPUID_VENDOR_HYGON_EBX &&
+        ecx == CPUID_VENDOR_HYGON_ECX &&
+        edx == CPUID_VENDOR_HYGON_EDX)
+        return true;
+    else
+        return false;
+}
+
+#else
+
+#define is_hygon_cpu() (false)
+
+#endif
+
+#endif
-- 
2.41.0.windows.1