[PATCH for-8.1 15/17] target/riscv: add RVG

[Daniel Henrique Barboza <dbarboza@ventanamicro.com>]

The 'G' bit in misa_ext is a virtual extension that enables a set of
extensions (i, m, a, f, d, icsr and ifencei). We'll want to avoid
setting it for write_misa(). Add it so we can gate write_misa() properly
against it.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 target/riscv/cpu.c | 4 ++++
 target/riscv/cpu.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 7a5d202069..7be6a86305 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -274,6 +274,9 @@ static uint32_t riscv_get_misa_ext_with_cpucfg(RISCVCPUConfig *cfg)
     if (cfg->ext_j) {
         ext |= RVJ;
     }
+    if (cfg->ext_g) {
+        ext |= RVG;
+    }
 
     return ext;
 }
@@ -293,6 +296,7 @@ static void riscv_set_cpucfg_with_misa(RISCVCPUConfig *cfg,
     cfg->ext_u = misa_ext & RVU;
     cfg->ext_h = misa_ext & RVH;
     cfg->ext_j = misa_ext & RVJ;
+    cfg->ext_g = misa_ext & RVG;
 }
 
 static void set_misa(CPURISCVState *env, RISCVMXL mxl, uint32_t ext)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 529d8044c4..013a1389d6 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -82,6 +82,7 @@
 #define RVU RV('U')
 #define RVH RV('H')
 #define RVJ RV('J')
+#define RVG RV('G')
 
 
 /* Privileged specification version */
-- 
2.39.2