target/arm: Implement GCSB

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-48-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index 2ae73f443a6a8cf0714d4ca4fc6b0b992fd4c10f..01b1b3e38be0613443a3ca61352cecc6028dc56f 100644 (file)
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -248,6 +248,7 @@ ERETA           1101011 0100 11111 00001 m:1 11111 11111 &reta  # ERETAA, ERETAB
     AUTIA1716   1101 0101 0000 0011 0010 0001 100 11111
     AUTIB1716   1101 0101 0000 0011 0010 0001 110 11111
     ESB         1101 0101 0000 0011 0010 0010 000 11111
+    GCSB        1101 0101 0000 0011 0010 0010 011 11111
     PACIAZ      1101 0101 0000 0011 0010 0011 000 11111
     PACIASP     1101 0101 0000 0011 0010 0011 001 11111
     PACIBZ      1101 0101 0000 0011 0010 0011 010 11111

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index b72aa968cd2fc7286e9883a3ef65ff7afd6f95f8..38a1f51ed5e29b77f7dbb5443fa6848d2ae53e41 100644 (file)
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2080,6 +2080,14 @@ static bool trans_ESB(DisasContext *s, arg_ESB *a)
     return true;
 }
 
+static bool trans_GCSB(DisasContext *s, arg_GCSB *a)
+{
+    if (dc_isar_feature(aa64_gcs, s)) {
+        tcg_gen_mb(TCG_BAR_SC | TCG_MO_ALL);
+    }
+    return true;
+}
+
 static bool trans_PACIAZ(DisasContext *s, arg_PACIAZ *a)
 {
     if (s->pauth_active) {