[PULL,3/4] target/riscv: Fix sfence.vm/a both available in any priv version

Commit Message

Palmer Dabbelt Nov. 13, 2018, 11:50 p.m. UTC

From: Bastian Koppelmann <[e-mail]>

sfence.vm has been replaced in priv v1.10 spec by sfence.vma.

Reported-by: Richard Henderson <[e-mail]>
Signed-off-by: Bastian Koppelmann <[e-mail]>
Reviewed-by: Richard Henderson <[e-mail]>
Signed-off-by: Palmer Dabbelt <[e-mail]>
---
 target/riscv/translate.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

Patch

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 5359088e24bc..f44eb9c41b48 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -1292,10 +1292,14 @@  static void gen_system(CPURISCVState *env, DisasContext *ctx, uint32_t opc,
 #ifndef CONFIG_USER_ONLY
     /* Extract funct7 value and check whether it matches SFENCE.VMA */
     if ((opc == OPC_RISC_ECALL) && ((csr >> 5) == 9)) {
-        /* sfence.vma */
-        /* TODO: handle ASID specific fences */
-        gen_helper_tlb_flush(cpu_env);
-        return;
+        if (env->priv_ver == PRIV_VERSION_1_10_0) {
+            /* sfence.vma */
+            /* TODO: handle ASID specific fences */
+            gen_helper_tlb_flush(cpu_env);
+            return;
+        } else {
+            gen_exception_illegal(ctx);
+        }
     }
 #endif
 
@@ -1342,7 +1346,11 @@  static void gen_system(CPURISCVState *env, DisasContext *ctx, uint32_t opc,
             gen_helper_wfi(cpu_env);
             break;
         case 0x104: /* SFENCE.VM */
-            gen_helper_tlb_flush(cpu_env);
+            if (env->priv_ver <= PRIV_VERSION_1_09_1) {
+                gen_helper_tlb_flush(cpu_env);
+            } else {
+                gen_exception_illegal(ctx);
+            }
             break;
 #endif
         default: