[PATCH v10 03/77] target/riscv: rvv-1.0: add mstatus VS field

[frank . chang]

From: LIU Zhiwei <zhiwei_liu@c-sky.com>

Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h        |  2 ++
 target/riscv/cpu_bits.h   |  1 +
 target/riscv/cpu_helper.c | 20 +++++++++++++++++++-
 target/riscv/csr.c        | 12 +++++++++++-
 4 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 5ea2004ae02..48b8f612109 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -352,6 +352,7 @@ int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, 
CPUState *cs,
 int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
 int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 bool riscv_cpu_fp_enabled(CPURISCVState *env);
+bool riscv_cpu_vector_enabled(CPURISCVState *env);
 bool riscv_cpu_virt_enabled(CPURISCVState *env);
 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
 bool riscv_cpu_two_stage_lookup(int mmu_idx);
@@ -395,6 +396,7 @@ void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
 #define TB_FLAGS_PRIV_MMU_MASK                3
 #define TB_FLAGS_PRIV_HYP_ACCESS_MASK   (1 << 2)
 #define TB_FLAGS_MSTATUS_FS MSTATUS_FS
+#define TB_FLAGS_MSTATUS_VS MSTATUS_VS
 
 typedef CPURISCVState CPUArchState;
 typedef RISCVCPU ArchCPU;
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 9913fa9f778..72a716c9990 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -375,6 +375,7 @@
 #define MSTATUS_UBE         0x00000040
 #define MSTATUS_MPIE        0x00000080
 #define MSTATUS_SPP         0x00000100
+#define MSTATUS_VS          0x00000600
 #define MSTATUS_MPP         0x00001800
 #define MSTATUS_FS          0x00006000
 #define MSTATUS_XS          0x00018000
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index f30ff672f8c..5789c2e9690 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -90,12 +90,17 @@ void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong 
*pc,
 
 #ifdef CONFIG_USER_ONLY
     flags |= TB_FLAGS_MSTATUS_FS;
+    flags |= TB_FLAGS_MSTATUS_VS;
 #else
     flags |= cpu_mmu_index(env, 0);
     if (riscv_cpu_fp_enabled(env)) {
         flags |= env->mstatus & MSTATUS_FS;
     }
 
+    if (riscv_cpu_vector_enabled(env)) {
+        flags |= env->mstatus & MSTATUS_VS;
+    }
+
     if (riscv_has_ext(env, RVH)) {
         if (env->priv == PRV_M ||
             (env->priv == PRV_S && !riscv_cpu_virt_enabled(env)) ||
@@ -189,11 +194,24 @@ bool riscv_cpu_fp_enabled(CPURISCVState *env)
     return false;
 }
 
+/* Return true is vector support is currently enabled */
+bool riscv_cpu_vector_enabled(CPURISCVState *env)
+{
+    if (env->mstatus & MSTATUS_VS) {
+        if (riscv_cpu_virt_enabled(env) && !(env->mstatus_hs & MSTATUS_VS)) {
+            return false;
+        }
+        return true;
+    }
+
+    return false;
+}
+
 void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env)
 {
     uint64_t mstatus_mask = MSTATUS_MXR | MSTATUS_SUM | MSTATUS_FS |
                             MSTATUS_SPP | MSTATUS_SPIE | MSTATUS_SIE |
-                            MSTATUS64_UXL;
+                            MSTATUS64_UXL | MSTATUS_VS;
     bool current_virt = riscv_cpu_virt_enabled(env);
 
     g_assert(riscv_has_ext(env, RVH));
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 9f41954894d..9b5bd5d7b49 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -273,6 +273,7 @@ static RISCVException write_fcsr(CPURISCVState *env, int 
csrno,
 {
 #if !defined(CONFIG_USER_ONLY)
     env->mstatus |= MSTATUS_FS;
+    env->mstatus |= MSTATUS_VS;
 #endif
     env->frm = (val & FSR_RD) >> FSR_RD_SHIFT;
     if (vs(env, csrno) >= 0) {
@@ -307,6 +308,9 @@ static RISCVException read_vxrm(CPURISCVState *env, int 
csrno,
 static RISCVException write_vxrm(CPURISCVState *env, int csrno,
                                  target_ulong val)
 {
+#if !defined(CONFIG_USER_ONLY)
+    env->mstatus |= MSTATUS_VS;
+#endif
     env->vxrm = val;
     return RISCV_EXCP_NONE;
 }
@@ -321,6 +325,9 @@ static RISCVException read_vxsat(CPURISCVState *env, int 
csrno,
 static RISCVException write_vxsat(CPURISCVState *env, int csrno,
                                   target_ulong val)
 {
+#if !defined(CONFIG_USER_ONLY)
+    env->mstatus |= MSTATUS_VS;
+#endif
     env->vxsat = val;
     return RISCV_EXCP_NONE;
 }
@@ -335,6 +342,9 @@ static RISCVException read_vstart(CPURISCVState *env, int 
csrno,
 static RISCVException write_vstart(CPURISCVState *env, int csrno,
                                    target_ulong val)
 {
+#if !defined(CONFIG_USER_ONLY)
+    env->mstatus |= MSTATUS_VS;
+#endif
     env->vstart = val;
     return RISCV_EXCP_NONE;
 }
@@ -535,7 +545,7 @@ static RISCVException write_mstatus(CPURISCVState *env, int 
csrno,
     mask = MSTATUS_SIE | MSTATUS_SPIE | MSTATUS_MIE | MSTATUS_MPIE |
         MSTATUS_SPP | MSTATUS_FS | MSTATUS_MPRV | MSTATUS_SUM |
         MSTATUS_MPP | MSTATUS_MXR | MSTATUS_TVM | MSTATUS_TSR |
-        MSTATUS_TW;
+        MSTATUS_TW | MSTATUS_VS;
 
     if (riscv_cpu_mxl(env) != MXL_RV32) {
         /*
-- 
2.25.1