[v8,04/78] target/riscv: rvv-1.0: add mstatus VS field

Message ID	20211015074627.3957162-5-frank.chang@sifive.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <SRS0=d4Ft=PD=nongnu.org=qemu-devel-bounces+qemu-devel=archiver.kernel.org@kernel.org> DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E203460BD3 From: frank.chang@sifive.com To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Subject: [PATCH v8 04/78] target/riscv: rvv-1.0: add mstatus VS field Date: Fri, 15 Oct 2021 15:45:05 +0800 Message-Id: <20211015074627.3957162-5-frank.chang@sifive.com> In-Reply-To: <20211015074627.3957162-1-frank.chang@sifive.com> References: <20211015074627.3957162-1-frank.chang@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::42a; envelope-from=frank.chang@sifive.com; helo=mail-pf1-x42a.google.com X-Spam_score_int: -1 X-Spam_score: -0.2 X-Spam_bar: / X-Spam_report: (-0.2 / 5.0 requ) DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action Precedence: list Cc: Frank Chang <frank.chang@sifive.com>, Bin Meng <bin.meng@windriver.com>, Richard Henderson <richard.henderson@linaro.org>, Alistair Francis <alistair.francis@wdc.com>, Palmer Dabbelt <palmer@dabbelt.com>, LIU Zhiwei <zhiwei_liu@c-sky.com> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" <qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org>
Series	support vector extension v1.0 \| expand [v8,00/78] support vector extension v1.0 [v8,01/78] target/riscv: fix TB_FLAGS bits overlapping bug for rvv/rvh [v8,02/78] target/riscv: drop vector 0.7.1 and add 1.0 support [v8,03/78] target/riscv: Use FIELD_EX32() to extract wd field [v8,04/78] target/riscv: rvv-1.0: add mstatus VS field [v8,05/78] target/riscv: rvv-1.0: add sstatus VS field [v8,06/78] target/riscv: rvv-1.0: introduce writable misa.v field [v8,07/78] target/riscv: rvv-1.0: add translation-time vector context status [v8,08/78] target/riscv: rvv-1.0: remove rvv related codes from fcsr registers [v8,09/78] target/riscv: rvv-1.0: add vcsr register [v8,10/78] target/riscv: rvv-1.0: add vlenb register [v8,11/78] target/riscv: rvv-1.0: check MSTATUS_VS when accessing vector csr registers [v8,12/78] target/riscv: rvv-1.0: remove MLEN calculations [v8,13/78] target/riscv: rvv-1.0: add fractional LMUL [v8,14/78] target/riscv: rvv-1.0: add VMA and VTA [v8,15/78] target/riscv: rvv-1.0: update check functions [v8,16/78] target/riscv: introduce more imm value modes in translator functions [v8,17/78] target/riscv: rvv:1.0: add translation-time nan-box helper function [18/76] target/riscv: rvv-1.0: configure instructions [19/76] target/riscv: rvv-1.0: stride load and store instructions [v8,20/78] target/riscv: rvv-1.0: stride load and store instructions [21/76] target/riscv: rvv-1.0: fix address index overflow bug of indexed load/store insns [v8,22/78] target/riscv: rvv-1.0: fix address index overflow bug of indexed load/store insns [23/76] target/riscv: rvv-1.0: amo operations [v8,24/78] target/riscv: rvv-1.0: load/store whole register instructions [v8,25/78] target/riscv: rvv-1.0: update vext_max_elems() for load/store insns [v8,26/78] target/riscv: rvv-1.0: take fractional LMUL into vector max elements calculation [v8,27/78] target/riscv: rvv-1.0: floating-point square-root instruction [v8,28/78] target/riscv: rvv-1.0: floating-point classify instructions [29/76] target/riscv: rvv-1.0: mask population count instruction [v8,30/78] target/riscv: rvv-1.0: find-first-set mask bit instruction [v8,31/78] target/riscv: rvv-1.0: set-X-first mask bit instructions [v8,32/78] target/riscv: rvv-1.0: iota instruction [v8,33/78] target/riscv: rvv-1.0: element index instruction [v8,34/78] target/riscv: rvv-1.0: allow load element with sign-extended [v8,35/78] target/riscv: rvv-1.0: register gather instructions [v8,36/78] target/riscv: rvv-1.0: integer scalar move instructions [v8,37/78] target/riscv: rvv-1.0: floating-point move instruction [v8,38/78] target/riscv: rvv-1.0: floating-point scalar move instructions [v8,39/78] target/riscv: rvv-1.0: whole register move instructions [v8,40/78] target/riscv: rvv-1.0: integer extension instructions [v8,41/78] target/riscv: rvv-1.0: single-width averaging add and subtract instructions [v8,42/78] target/riscv: rvv-1.0: single-width bit shift instructions [v8,43/78] target/riscv: rvv-1.0: integer add-with-carry/subtract-with-borrow [v8,44/78] target/riscv: rvv-1.0: narrowing integer right shift instructions [v8,45/78] target/riscv: rvv-1.0: widening integer multiply-add instructions [v8,46/78] target/riscv: rvv-1.0: single-width saturating add and subtract instructions [v8,47/78] target/riscv: rvv-1.0: integer comparison instructions [v8,48/78] target/riscv: rvv-1.0: floating-point compare instructions [v8,49/78] target/riscv: rvv-1.0: mask-register logical instructions [v8,50/78] target/riscv: rvv-1.0: slide instructions [v8,51/78] target/riscv: rvv-1.0: floating-point slide instructions [v8,52/78] target/riscv: rvv-1.0: narrowing fixed-point clip instructions [v8,53/78] target/riscv: rvv-1.0: single-width floating-point reduction [v8,54/78] target/riscv: rvv-1.0: widening floating-point reduction instructions [v8,55/78] target/riscv: rvv-1.0: single-width scaling shift instructions [v8,56/78] target/riscv: rvv-1.0: remove widening saturating scaled multiply-add [v8,57/78] target/riscv: rvv-1.0: remove vmford.vv and vmford.vf [v8,58/78] target/riscv: rvv-1.0: remove integer extract instruction [v8,59/78] target/riscv: rvv-1.0: floating-point min/max instructions [v8,60/78] target/riscv: introduce floating-point rounding mode enum [v8,61/78] target/riscv: rvv-1.0: floating-point/integer type-convert instructions [v8,62/78] target/riscv: rvv-1.0: widening floating-point/integer type-convert [v8,63/78] target/riscv: add "set round to odd" rounding mode helper function [v8,64/78] target/riscv: rvv-1.0: narrowing floating-point/integer type-convert [v8,65/78] target/riscv: rvv-1.0: relax RV_VLEN_MAX to 1024-bits [v8,66/78] target/riscv: rvv-1.0: implement vstart CSR [v8,67/78] target/riscv: rvv-1.0: trigger illegal instruction exception if frm is not valid [v8,68/78] target/riscv: rvv-1.0: set mstatus.SD bit when writing vector CSRs [v8,69/78] target/riscv: gdb: support vector registers for rv64 & rv32 [v8,70/78] target/riscv: rvv-1.0: floating-point reciprocal square-root estimate instruction [v8,71/78] target/riscv: rvv-1.0: floating-point reciprocal estimate instruction [v8,72/78] target/riscv: set mstatus.SD bit when writing fp CSRs [v8,73/78] target/riscv: rvv-1.0: rename r2_zimm to r2_zimm11 [v8,74/78] target/riscv: rvv-1.0: add vsetivli instruction [v8,75/78] target/riscv: rvv-1.0: add evl parameter to vext_ldst_us() [v8,76/78] target/riscv: rvv-1.0: add vector unit-stride mask load/store insns [v8,77/78] target/riscv: rvv-1.0: rename vmandnot.mm and vmornot.mm to vmandn.mm and vmorn.mm [v8,78/78] target/riscv: rvv-1.0: update opivv_vadc_check() comment

Message ID

20211015074627.3957162-5-frank.chang@sifive.com (mailing list archive)

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New, archived

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DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E203460BD3
From: frank.chang@sifive.com
To: qemu-devel@nongnu.org,
	qemu-riscv@nongnu.org
Subject: [PATCH v8 04/78] target/riscv: rvv-1.0: add mstatus VS field
Date: Fri, 15 Oct 2021 15:45:05 +0800
Message-Id: <20211015074627.3957162-5-frank.chang@sifive.com>
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Cc: Frank Chang <frank.chang@sifive.com>, Bin Meng <bin.meng@windriver.com>,
 Richard Henderson <richard.henderson@linaro.org>,
 Alistair Francis <alistair.francis@wdc.com>,
 Palmer Dabbelt <palmer@dabbelt.com>, LIU Zhiwei <zhiwei_liu@c-sky.com>
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Series

support vector extension v1.0 | expand

Commit Message

Frank Chang Oct. 15, 2021, 7:45 a.m. UTC

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        |  7 +++++++
 target/riscv/cpu_bits.h   |  1 +
 target/riscv/cpu_helper.c | 15 ++++++++++++++-
 target/riscv/csr.c        | 25 ++++++++++++++++++++++++-
 4 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 8ded9da5623..b951e39602c 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -338,6 +338,7 @@  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_force_hs_excep_enabled(CPURISCVState *env);
@@ -383,6 +384,7 @@  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;
@@ -439,6 +441,7 @@  static inline 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)) {
@@ -456,6 +459,10 @@  static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
         flags = FIELD_DP32(flags, TB_FLAGS, MSTATUS_HS_FS,
                            get_field(env->mstatus_hs, MSTATUS_FS));
     }
+
+    if (riscv_cpu_vector_enabled(env)) {
+        flags |= env->mstatus & MSTATUS_VS;
+    }
 #endif
 
     *pflags = flags;
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 999187a9ee2..8c2fd35d2ef 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -343,6 +343,7 @@ 
 #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 d41d5cd27c1..fedde9ea0de 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -104,12 +104,25 @@  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 sd = riscv_cpu_is_32bit(env) ? MSTATUS32_SD : MSTATUS64_SD;
     uint64_t mstatus_mask = MSTATUS_MXR | MSTATUS_SUM | MSTATUS_FS |
                             MSTATUS_SPP | MSTATUS_SPIE | MSTATUS_SIE |
-                            MSTATUS64_UXL | sd;
+                            MSTATUS64_UXL | MSTATUS_VS | sd;
     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 23fbbd32162..cc0131d7962 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -263,6 +263,7 @@  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) {
@@ -297,6 +298,13 @@  static RISCVException read_vxrm(CPURISCVState *env, int csrno,
 static RISCVException write_vxrm(CPURISCVState *env, int csrno,
                                  target_ulong val)
 {
+#if !defined(CONFIG_USER_ONLY)
+    if (!env->debugger && !riscv_cpu_vector_enabled(env)) {
+        return RISCV_EXCP_ILLEGAL_INST;
+    }
+    env->mstatus |= MSTATUS_VS;
+#endif
+
     env->vxrm = val;
     return RISCV_EXCP_NONE;
 }
@@ -311,6 +319,13 @@  static RISCVException read_vxsat(CPURISCVState *env, int csrno,
 static RISCVException write_vxsat(CPURISCVState *env, int csrno,
                                   target_ulong val)
 {
+#if !defined(CONFIG_USER_ONLY)
+    if (!env->debugger && !riscv_cpu_vector_enabled(env)) {
+        return RISCV_EXCP_ILLEGAL_INST;
+    }
+    env->mstatus |= MSTATUS_VS;
+#endif
+
     env->vxsat = val;
     return RISCV_EXCP_NONE;
 }
@@ -325,6 +340,13 @@  static RISCVException read_vstart(CPURISCVState *env, int csrno,
 static RISCVException write_vstart(CPURISCVState *env, int csrno,
                                    target_ulong val)
 {
+#if !defined(CONFIG_USER_ONLY)
+    if (!env->debugger && !riscv_cpu_vector_enabled(env)) {
+        return RISCV_EXCP_ILLEGAL_INST;
+    }
+    env->mstatus |= MSTATUS_VS;
+#endif
+
     env->vstart = val;
     return RISCV_EXCP_NONE;
 }
@@ -508,7 +530,7 @@  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_is_32bit(env)) {
         /*
@@ -521,6 +543,7 @@  static RISCVException write_mstatus(CPURISCVState *env, int csrno,
     mstatus = (mstatus & ~mask) | (val & mask);
 
     dirty = ((mstatus & MSTATUS_FS) == MSTATUS_FS) |
+            ((mstatus & MSTATUS_VS) == MSTATUS_VS) |
             ((mstatus & MSTATUS_XS) == MSTATUS_XS);
     if (riscv_cpu_is_32bit(env)) {
         mstatus = set_field(mstatus, MSTATUS32_SD, dirty);

[v8,04/78] target/riscv: rvv-1.0: add mstatus VS field

Commit Message

Patch