[RFC 5/5] target/riscv: Enable privileged spec version 1.12

[Atish Patra]

Virt machine uses privileged specification version 1.12 now.
All other machine continue to use the default one defined for that
machine unless changed to 1.12 by the user explicitly.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
---
 target/riscv/cpu.c |  8 +++++---
 target/riscv/csr.c | 10 ++++++++++
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 9bc25d3055d4..cec5791151e7 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -153,7 +153,7 @@ static void riscv_any_cpu_init(Object *obj)
 #elif defined(TARGET_RISCV64)
     set_misa(env, MXL_RV64, RVI | RVM | RVA | RVF | RVD | RVC | RVU);
 #endif
-    set_priv_version(env, PRIV_VERSION_1_11_0);
+    set_priv_version(env, PRIV_VERSION_1_12_0);
 }
 
 #if defined(TARGET_RISCV64)
@@ -439,7 +439,9 @@ static void riscv_cpu_realize(DeviceState *dev, Error 
**errp)
     }
 
     if (cpu->cfg.priv_spec) {
-        if (!g_strcmp0(cpu->cfg.priv_spec, "v1.11.0")) {
+        if (!g_strcmp0(cpu->cfg.priv_spec, "v1.12.0")) {
+            priv_version = PRIV_VERSION_1_12_0;
+        } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.11.0")) {
             priv_version = PRIV_VERSION_1_11_0;
         } else if (!g_strcmp0(cpu->cfg.priv_spec, "v1.10.0")) {
             priv_version = PRIV_VERSION_1_10_0;
@@ -454,7 +456,7 @@ static void riscv_cpu_realize(DeviceState *dev, Error 
**errp)
     if (priv_version) {
         set_priv_version(env, priv_version);
     } else if (!env->priv_ver) {
-        set_priv_version(env, PRIV_VERSION_1_11_0);
+        set_priv_version(env, PRIV_VERSION_1_12_0);
     }
 
     if (cpu->cfg.mmu) {
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index a4bbae7a1bbd..62d429cc3f17 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -1874,6 +1874,12 @@ static inline RISCVException 
riscv_csrrw_check(CPURISCVState *env,
     int read_only = get_field(csrno, 0xC00) == 3;
 #if !defined(CONFIG_USER_ONLY)
     int effective_priv = env->priv;
+    int csr_min_priv = csr_ops[csrno].min_priv_ver;
+
+    /* The default privilege specification version supported is 1.10 */
+    if (!csr_min_priv) {
+        csr_min_priv = PRIV_VERSION_1_10_0;
+    }
 
     if (riscv_has_ext(env, RVH) &&
         env->priv == PRV_S &&
@@ -1904,6 +1910,10 @@ static inline RISCVException 
riscv_csrrw_check(CPURISCVState *env,
         return RISCV_EXCP_ILLEGAL_INST;
     }
 
+    if (env->priv_ver < csr_min_priv) {
+        return RISCV_EXCP_ILLEGAL_INST;
+    }
+
     return csr_ops[csrno].predicate(env, csrno);
 }
 
-- 
2.30.2