From 54648e0e5a45acf2e472430ee83bb8dfa057fb30 Mon Sep 17 00:00:00 2001
From: jiangxin <jiangxin@hygon.cn>
Date: Tue, 24 Aug 2021 14:57:28 +0800
Subject: [PATCH] target/i386: csv: Add CSV3 context

CSV/CSV2/CSV3 are the secure virtualization features on Hygon CPUs.
The CSV and CSV2 are compatible with the AMD SEV and SEV-ES,
respectively. From CSV3, we introduced more secure features to
protect the guest, users can bit 6 of the guest policy to run a
CSV3 guest.

Add the context and the build option.

Signed-off-by: Xin Jiang <jiangxin@hygon.cn>
Signed-off-by: hanliyang <hanliyang@hygon.cn>
---
 target/i386/csv.c | 11 +++++++++++
 target/i386/csv.h | 17 +++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/target/i386/csv.c b/target/i386/csv.c
index 88fb05ac37..9a1de04db7 100644
--- a/target/i386/csv.c
+++ b/target/i386/csv.c
@@ -18,3 +18,14 @@
 #include "csv.h"
 
 bool csv_kvm_cpu_reset_inhibit;
+
+Csv3GuestState csv3_guest = { 0 };
+
+bool
+csv3_enabled(void)
+{
+    if (!is_hygon_cpu())
+        return false;
+
+    return sev_es_enabled() && (csv3_guest.policy & GUEST_POLICY_CSV3_BIT);
+}
diff --git a/target/i386/csv.h b/target/i386/csv.h
index 05e7fd8dc1..ea87c1ba27 100644
--- a/target/i386/csv.h
+++ b/target/i386/csv.h
@@ -14,6 +14,9 @@
 #ifndef I386_CSV_H
 #define I386_CSV_H
 
+#include "qapi/qapi-commands-misc-target.h"
+
+#define GUEST_POLICY_CSV3_BIT    (1 << 6)
 #define GUEST_POLICY_REUSE_ASID  (1 << 7)
 
 #ifdef CONFIG_CSV
@@ -40,9 +43,12 @@ static bool __attribute__((unused)) is_hygon_cpu(void)
         return false;
 }
 
+bool csv3_enabled(void);
+
 #else
 
 #define is_hygon_cpu() (false)
+#define csv3_enabled() (false)
 
 #endif
 
@@ -66,4 +72,15 @@ int csv_load_queued_incoming_pages(QEMUFile *f);
 int csv_save_outgoing_cpu_state(QEMUFile *f, uint64_t *bytes_sent);
 int csv_load_incoming_cpu_state(QEMUFile *f);
 
+/* CSV3 */
+struct Csv3GuestState {
+    uint32_t policy;
+    int sev_fd;
+    void *state;
+};
+
+typedef struct Csv3GuestState Csv3GuestState;
+
+extern struct Csv3GuestState csv3_guest;
+
 #endif
-- 
2.41.0.windows.1