target/riscv: add support for svinval extension

- sinval.vma, hinval.vvma and hinval.gvma do the same as sfence.vma, hfence.vvma and hfence.gvma except extension check
- do nothing other than extension check for sfence.w.inval and sfence.inval.ir

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220204022658.18097-5-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu.c

@@ -774,6 +774,7 @@ static Property riscv_cpu_properties[] = {
     DEFINE_PROP_UINT16("vlen", RISCVCPU, cfg.vlen, 128),
     DEFINE_PROP_UINT16("elen", RISCVCPU, cfg.elen, 64),
 
+    DEFINE_PROP_BOOL("svinval", RISCVCPU, cfg.ext_svinval, false),
     DEFINE_PROP_BOOL("svnapot", RISCVCPU, cfg.ext_svnapot, false),
 
     DEFINE_PROP_BOOL("zba", RISCVCPU, cfg.ext_zba, true),

target/riscv/cpu.h

@@ -359,6 +359,7 @@ struct RISCVCPUConfig {
     bool ext_counters;
     bool ext_ifencei;
     bool ext_icsr;
+    bool ext_svinval;
     bool ext_svnapot;
     bool ext_svpbmt;
     bool ext_zfh;

target/riscv/insn32.decode

@@ -809,3 +809,10 @@ fcvt_l_h   1100010  00010 ..... ... ..... 1010011 @r2_rm
 fcvt_lu_h  1100010  00011 ..... ... ..... 1010011 @r2_rm
 fcvt_h_l   1101010  00010 ..... ... ..... 1010011 @r2_rm
 fcvt_h_lu  1101010  00011 ..... ... ..... 1010011 @r2_rm
+
+# *** Svinval Standard Extension ***
+sinval_vma        0001011 ..... ..... 000 00000 1110011 @sfence_vma
+sfence_w_inval    0001100 00000 00000 000 00000 1110011
+sfence_inval_ir   0001100 00001 00000 000 00000 1110011
+hinval_vvma       0010011 ..... ..... 000 00000 1110011 @hfence_vvma
+hinval_gvma       0110011 ..... ..... 000 00000 1110011 @hfence_gvma

target/riscv/insn_trans/trans_svinval.c.inc

@@ -0,0 +1,75 @@
+/*
+ * RISC-V translation routines for the Svinval Standard Instruction Set.
+ *
+ * Copyright (c) 2020-2022 PLCT lab
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define REQUIRE_SVINVAL(ctx) do {          \
+    if (!ctx->cfg_ptr->ext_svinval) {      \
+        return false;                      \
+    }                                      \
+} while (0)
+
+static bool trans_sinval_vma(DisasContext *ctx, arg_sinval_vma *a)
+{
+    REQUIRE_SVINVAL(ctx);
+    /* Do the same as sfence.vma currently */
+    REQUIRE_EXT(ctx, RVS);
+#ifndef CONFIG_USER_ONLY
+    gen_helper_tlb_flush(cpu_env);
+    return true;
+#endif
+    return false;
+}
+
+static bool trans_sfence_w_inval(DisasContext *ctx, arg_sfence_w_inval *a)
+{
+    REQUIRE_SVINVAL(ctx);
+    REQUIRE_EXT(ctx, RVS);
+    /* Do nothing currently */
+    return true;
+}
+
+static bool trans_sfence_inval_ir(DisasContext *ctx, arg_sfence_inval_ir *a)
+{
+    REQUIRE_SVINVAL(ctx);
+    REQUIRE_EXT(ctx, RVS);
+    /* Do nothing currently */
+    return true;
+}
+
+static bool trans_hinval_vvma(DisasContext *ctx, arg_hinval_vvma *a)
+{
+    REQUIRE_SVINVAL(ctx);
+    /* Do the same as hfence.vvma currently */
+    REQUIRE_EXT(ctx, RVH);
+#ifndef CONFIG_USER_ONLY
+    gen_helper_hyp_tlb_flush(cpu_env);
+    return true;
+#endif
+    return false;
+}
+
+static bool trans_hinval_gvma(DisasContext *ctx, arg_hinval_gvma *a)
+{
+    REQUIRE_SVINVAL(ctx);
+    /* Do the same as hfence.gvma currently */
+    REQUIRE_EXT(ctx, RVH);
+#ifndef CONFIG_USER_ONLY
+    gen_helper_hyp_gvma_tlb_flush(cpu_env);
+    return true;
+#endif
+    return false;
+}

target/riscv/translate.c

@@ -862,6 +862,7 @@ static uint32_t opcode_at(DisasContextBase *dcbase, target_ulong pc)
 #include "insn_trans/trans_rvb.c.inc"
 #include "insn_trans/trans_rvzfh.c.inc"
 #include "insn_trans/trans_privileged.c.inc"
+#include "insn_trans/trans_svinval.c.inc"
 #include "insn_trans/trans_xventanacondops.c.inc"
 
 /* Include the auto-generated decoder for 16 bit insn */