[PATCH v3 0/6] target/riscv: Support RISC-V privilege 1.13 spec

[PATCH v3 0/6] target/riscv: Support RISC-V privilege 1.13 spec

[Fea.Wang]

Based on the change log for the RISC-V privilege 1.13 spec, add the
support for ss1p13.

base-commit: 915758c537b5fe09575291f4acd87e2d377a93de

* Correct the mstateen0 for P1P13 in commit message
* Refactor commit by splitting to two commits

[v2]
* Check HEDELEGH by hmode32 instead of any32
* Remove unnecessary code
* Refine calling functions

[v1]

Ref:https://github.com/riscv/riscv-isa-manual/blob/a7d93c9/src/priv-preface.adoc?plain=1#L40-L72

Lists what to do without clarification or document format.
* Redefined misa.MXL to be read-only, making MXLEN a constant.(Skip, implementation ignored)
* Added the constraint that SXLEN≥UXLEN.(Skip, implementation ignored)
* Defined the misa.V field to reflect that the V extension has been implemented.(Skip, existed) 
* Defined the RV32-only medelegh and hedelegh CSRs.(Done in these patches)
* Defined the misaligned atomicity granule PMA, superseding the proposed Zam extension..(Skip, implementation ignored)
* Allocated interrupt 13 for Sscofpmf LCOFI interrupt.(Skip, existed) 
* Defined hardware error and software check exception codes.(Done in these patches)
* Specified synchronization requirements when changing the PBMTE fields in menvcfg and henvcfg.(Skip, implementation ignored)
* Incorporated Svade and Svadu extension specifications.(Skip, existed) 


Fea.Wang (5):
  target/riscv: Define macros and variables for ss1p13
  target/riscv: Support the version for ss1p13
  target/riscv: Add 'P1P13' bit in SMSTATEEN0
  target/riscv: Add MEDELEGH, HEDELEGH csrs for RV32
  target/riscv: Reserve exception codes for sw-check and hw-err

Jim Shu (1):
  target/riscv: Reuse the conversion function of priv_spec

 target/riscv/cpu.c         |  8 ++++++--
 target/riscv/cpu.h         |  5 ++++-
 target/riscv/cpu_bits.h    |  5 +++++
 target/riscv/cpu_cfg.h     |  1 +
 target/riscv/csr.c         | 39 ++++++++++++++++++++++++++++++++++++++
 target/riscv/tcg/tcg-cpu.c | 17 ++++++++---------
 6 files changed, 63 insertions(+), 12 deletions(-)

-- 
2.34.1

[PATCH v3 1/6] target/riscv: Reuse the conversion function of priv_spec

[Fea.Wang]

From: Jim Shu <jim.shu@sifive.com>

Public the conversion function of priv_spec in cpu.h, so that tcg-cpu.c
could also use it.

Signed-off-by: Jim Shu <jim.shu@sifive.com>
Signed-off-by: Fea.Wang <fea.wang@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.c         |  2 +-
 target/riscv/cpu.h         |  1 +
 target/riscv/tcg/tcg-cpu.c | 13 ++++---------
 3 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index cee6fc4a9a..e9e69b9863 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -1786,7 +1786,7 @@ static int priv_spec_from_str(const char *priv_spec_str)
     return priv_version;
 }
 
-static const char *priv_spec_to_str(int priv_version)
+const char *priv_spec_to_str(int priv_version)
 {
     switch (priv_version) {
     case PRIV_VERSION_1_10_0:
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 12d8b5344a..94600b91fa 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -829,4 +829,5 @@ const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit);
 /* Implemented in th_csr.c */
 void th_register_custom_csrs(RISCVCPU *cpu);
 
+const char *priv_spec_to_str(int priv_version);
 #endif /* RISCV_CPU_H */
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index 683f604d9f..60fe0fd060 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -76,16 +76,11 @@ static void riscv_cpu_write_misa_bit(RISCVCPU *cpu, uint32_t bit,
 
 static const char *cpu_priv_ver_to_str(int priv_ver)
 {
-    switch (priv_ver) {
-    case PRIV_VERSION_1_10_0:
-        return "v1.10.0";
-    case PRIV_VERSION_1_11_0:
-        return "v1.11.0";
-    case PRIV_VERSION_1_12_0:
-        return "v1.12.0";
-    }
+    const char *priv_spec_str = priv_spec_to_str(priv_ver);
 
-    g_assert_not_reached();
+    g_assert(priv_spec_str);
+
+    return priv_spec_str;
 }
 
 static void riscv_cpu_synchronize_from_tb(CPUState *cs,
-- 
2.34.1

[PATCH v3 2/6] target/riscv: Define macros and variables for ss1p13

[Fea.Wang]

Add macros and variables for RISC-V privilege 1.13 support.

Signed-off-by: Fea.Wang <fea.wang@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Weiwei Li <liwei1518@gmail.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
---
 target/riscv/cpu.h     | 4 +++-
 target/riscv/cpu_cfg.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 94600b91fa..4d73486ea2 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -96,12 +96,14 @@ extern RISCVCPUProfile *riscv_profiles[];
 #define PRIV_VER_1_10_0_STR "v1.10.0"
 #define PRIV_VER_1_11_0_STR "v1.11.0"
 #define PRIV_VER_1_12_0_STR "v1.12.0"
+#define PRIV_VER_1_13_0_STR "v1.13.0"
 enum {
     PRIV_VERSION_1_10_0 = 0,
     PRIV_VERSION_1_11_0,
     PRIV_VERSION_1_12_0,
+    PRIV_VERSION_1_13_0,
 
-    PRIV_VERSION_LATEST = PRIV_VERSION_1_12_0,
+    PRIV_VERSION_LATEST = PRIV_VERSION_1_13_0,
 };
 
 #define VEXT_VERSION_1_00_0 0x00010000
diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
index e1e4f32698..fb7eebde52 100644
--- a/target/riscv/cpu_cfg.h
+++ b/target/riscv/cpu_cfg.h
@@ -136,6 +136,7 @@ struct RISCVCPUConfig {
      * TCG always implement/can't be user disabled,
      * based on spec version.
      */
+    bool has_priv_1_13;
     bool has_priv_1_12;
     bool has_priv_1_11;
 
-- 
2.34.1

Re: [PATCH v3 2/6] target/riscv: Define macros and variables for ss1p13

[Alistair Francis]

On Tue, Jun 4, 2024 at 4:23 PM Fea.Wang <fea.wang@sifive.com> wrote:
>
> Add macros and variables for RISC-V privilege 1.13 support.
>
> Signed-off-by: Fea.Wang <fea.wang@sifive.com>
> Reviewed-by: Frank Chang <frank.chang@sifive.com>
> Reviewed-by: Weiwei Li <liwei1518@gmail.com>
> Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  target/riscv/cpu.h     | 4 +++-
>  target/riscv/cpu_cfg.h | 1 +
>  2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index 94600b91fa..4d73486ea2 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -96,12 +96,14 @@ extern RISCVCPUProfile *riscv_profiles[];
>  #define PRIV_VER_1_10_0_STR "v1.10.0"
>  #define PRIV_VER_1_11_0_STR "v1.11.0"
>  #define PRIV_VER_1_12_0_STR "v1.12.0"
> +#define PRIV_VER_1_13_0_STR "v1.13.0"
>  enum {
>      PRIV_VERSION_1_10_0 = 0,
>      PRIV_VERSION_1_11_0,
>      PRIV_VERSION_1_12_0,
> +    PRIV_VERSION_1_13_0,
>
> -    PRIV_VERSION_LATEST = PRIV_VERSION_1_12_0,
> +    PRIV_VERSION_LATEST = PRIV_VERSION_1_13_0,
>  };
>
>  #define VEXT_VERSION_1_00_0 0x00010000
> diff --git a/target/riscv/cpu_cfg.h b/target/riscv/cpu_cfg.h
> index e1e4f32698..fb7eebde52 100644
> --- a/target/riscv/cpu_cfg.h
> +++ b/target/riscv/cpu_cfg.h
> @@ -136,6 +136,7 @@ struct RISCVCPUConfig {
>       * TCG always implement/can't be user disabled,
>       * based on spec version.
>       */
> +    bool has_priv_1_13;
>      bool has_priv_1_12;
>      bool has_priv_1_11;
>
> --
> 2.34.1
>
>

[PATCH v3 3/6] target/riscv: Support the version for ss1p13

[Fea.Wang]

Add RISC-V privilege 1.13 support.

Signed-off-by: Fea.Wang <fea.wang@sifive.com>
Signed-off-by: Fea.Wang <fea.wang@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Weiwei Li <liwei1518@gmail.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
---
 target/riscv/cpu.c         | 6 +++++-
 target/riscv/tcg/tcg-cpu.c | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index e9e69b9863..02c1e12a03 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -1775,7 +1775,9 @@ static int priv_spec_from_str(const char *priv_spec_str)
 {
     int priv_version = -1;
 
-    if (!g_strcmp0(priv_spec_str, PRIV_VER_1_12_0_STR)) {
+    if (!g_strcmp0(priv_spec_str, PRIV_VER_1_13_0_STR)) {
+        priv_version = PRIV_VERSION_1_13_0;
+    } else if (!g_strcmp0(priv_spec_str, PRIV_VER_1_12_0_STR)) {
         priv_version = PRIV_VERSION_1_12_0;
     } else if (!g_strcmp0(priv_spec_str, PRIV_VER_1_11_0_STR)) {
         priv_version = PRIV_VERSION_1_11_0;
@@ -1795,6 +1797,8 @@ const char *priv_spec_to_str(int priv_version)
         return PRIV_VER_1_11_0_STR;
     case PRIV_VERSION_1_12_0:
         return PRIV_VER_1_12_0_STR;
+    case PRIV_VERSION_1_13_0:
+        return PRIV_VER_1_13_0_STR;
     default:
         return NULL;
     }
diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
index 60fe0fd060..595d3b5b8f 100644
--- a/target/riscv/tcg/tcg-cpu.c
+++ b/target/riscv/tcg/tcg-cpu.c
@@ -318,6 +318,10 @@ static void riscv_cpu_update_named_features(RISCVCPU *cpu)
         cpu->cfg.has_priv_1_12 = true;
     }
 
+    if (cpu->env.priv_ver >= PRIV_VERSION_1_13_0) {
+        cpu->cfg.has_priv_1_13 = true;
+    }
+
     /* zic64b is 1.12 or later */
     cpu->cfg.ext_zic64b = cpu->cfg.cbom_blocksize == 64 &&
                           cpu->cfg.cbop_blocksize == 64 &&
-- 
2.34.1

Re: [PATCH v3 3/6] target/riscv: Support the version for ss1p13

[Alistair Francis]

On Tue, Jun 4, 2024 at 4:23 PM Fea.Wang <fea.wang@sifive.com> wrote:
>
> Add RISC-V privilege 1.13 support.
>
> Signed-off-by: Fea.Wang <fea.wang@sifive.com>
> Signed-off-by: Fea.Wang <fea.wang@sifive.com>
> Reviewed-by: Frank Chang <frank.chang@sifive.com>
> Reviewed-by: Weiwei Li <liwei1518@gmail.com>
> Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>

This should be the last patch in the series. The idea is that we add
support and then let users enable it.

Alistair

> ---
>  target/riscv/cpu.c         | 6 +++++-
>  target/riscv/tcg/tcg-cpu.c | 4 ++++
>  2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index e9e69b9863..02c1e12a03 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -1775,7 +1775,9 @@ static int priv_spec_from_str(const char *priv_spec_str)
>  {
>      int priv_version = -1;
>
> -    if (!g_strcmp0(priv_spec_str, PRIV_VER_1_12_0_STR)) {
> +    if (!g_strcmp0(priv_spec_str, PRIV_VER_1_13_0_STR)) {
> +        priv_version = PRIV_VERSION_1_13_0;
> +    } else if (!g_strcmp0(priv_spec_str, PRIV_VER_1_12_0_STR)) {
>          priv_version = PRIV_VERSION_1_12_0;
>      } else if (!g_strcmp0(priv_spec_str, PRIV_VER_1_11_0_STR)) {
>          priv_version = PRIV_VERSION_1_11_0;
> @@ -1795,6 +1797,8 @@ const char *priv_spec_to_str(int priv_version)
>          return PRIV_VER_1_11_0_STR;
>      case PRIV_VERSION_1_12_0:
>          return PRIV_VER_1_12_0_STR;
> +    case PRIV_VERSION_1_13_0:
> +        return PRIV_VER_1_13_0_STR;
>      default:
>          return NULL;
>      }
> diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
> index 60fe0fd060..595d3b5b8f 100644
> --- a/target/riscv/tcg/tcg-cpu.c
> +++ b/target/riscv/tcg/tcg-cpu.c
> @@ -318,6 +318,10 @@ static void riscv_cpu_update_named_features(RISCVCPU *cpu)
>          cpu->cfg.has_priv_1_12 = true;
>      }
>
> +    if (cpu->env.priv_ver >= PRIV_VERSION_1_13_0) {
> +        cpu->cfg.has_priv_1_13 = true;
> +    }
> +
>      /* zic64b is 1.12 or later */
>      cpu->cfg.ext_zic64b = cpu->cfg.cbom_blocksize == 64 &&
>                            cpu->cfg.cbop_blocksize == 64 &&
> --
> 2.34.1
>
>

Re: [PATCH v3 3/6] target/riscv: Support the version for ss1p13

[Fea Wang]

[-- Attachment #1: Type: text/plain, Size: 2563 bytes --]

Sure, I will reorder the commits in the next patch series.
Thank you

Sincerely,
Fea

On Thu, Jun 6, 2024 at 7:58 AM Alistair Francis <alistair23@gmail.com>
wrote:

> On Tue, Jun 4, 2024 at 4:23 PM Fea.Wang <fea.wang@sifive.com> wrote:
> >
> > Add RISC-V privilege 1.13 support.
> >
> > Signed-off-by: Fea.Wang <fea.wang@sifive.com>
> > Signed-off-by: Fea.Wang <fea.wang@sifive.com>
> > Reviewed-by: Frank Chang <frank.chang@sifive.com>
> > Reviewed-by: Weiwei Li <liwei1518@gmail.com>
> > Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
>
> This should be the last patch in the series. The idea is that we add
> support and then let users enable it.
>
> Alistair
>
> > ---
> >  target/riscv/cpu.c         | 6 +++++-
> >  target/riscv/tcg/tcg-cpu.c | 4 ++++
> >  2 files changed, 9 insertions(+), 1 deletion(-)
> >
> > diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> > index e9e69b9863..02c1e12a03 100644
> > --- a/target/riscv/cpu.c
> > +++ b/target/riscv/cpu.c
> > @@ -1775,7 +1775,9 @@ static int priv_spec_from_str(const char
> *priv_spec_str)
> >  {
> >      int priv_version = -1;
> >
> > -    if (!g_strcmp0(priv_spec_str, PRIV_VER_1_12_0_STR)) {
> > +    if (!g_strcmp0(priv_spec_str, PRIV_VER_1_13_0_STR)) {
> > +        priv_version = PRIV_VERSION_1_13_0;
> > +    } else if (!g_strcmp0(priv_spec_str, PRIV_VER_1_12_0_STR)) {
> >          priv_version = PRIV_VERSION_1_12_0;
> >      } else if (!g_strcmp0(priv_spec_str, PRIV_VER_1_11_0_STR)) {
> >          priv_version = PRIV_VERSION_1_11_0;
> > @@ -1795,6 +1797,8 @@ const char *priv_spec_to_str(int priv_version)
> >          return PRIV_VER_1_11_0_STR;
> >      case PRIV_VERSION_1_12_0:
> >          return PRIV_VER_1_12_0_STR;
> > +    case PRIV_VERSION_1_13_0:
> > +        return PRIV_VER_1_13_0_STR;
> >      default:
> >          return NULL;
> >      }
> > diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
> > index 60fe0fd060..595d3b5b8f 100644
> > --- a/target/riscv/tcg/tcg-cpu.c
> > +++ b/target/riscv/tcg/tcg-cpu.c
> > @@ -318,6 +318,10 @@ static void
> riscv_cpu_update_named_features(RISCVCPU *cpu)
> >          cpu->cfg.has_priv_1_12 = true;
> >      }
> >
> > +    if (cpu->env.priv_ver >= PRIV_VERSION_1_13_0) {
> > +        cpu->cfg.has_priv_1_13 = true;
> > +    }
> > +
> >      /* zic64b is 1.12 or later */
> >      cpu->cfg.ext_zic64b = cpu->cfg.cbom_blocksize == 64 &&
> >                            cpu->cfg.cbop_blocksize == 64 &&
> > --
> > 2.34.1
> >
> >
>

[-- Attachment #2: Type: text/html, Size: 3709 bytes --]

[PATCH v3 4/6] target/riscv: Add 'P1P13' bit in SMSTATEEN0

[Fea.Wang]

Based on privilege 1.13 spec, there should be a bit56 for 'P1P13' in
mstateen0 that controls access to the hedeleg.

Signed-off-by: Fea.Wang <fea.wang@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Weiwei Li <liwei1518@gmail.com>
---
 target/riscv/cpu_bits.h | 1 +
 target/riscv/csr.c      | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 74318a925c..28bd3fb0b4 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -315,6 +315,7 @@
 #define SMSTATEEN0_CS       (1ULL << 0)
 #define SMSTATEEN0_FCSR     (1ULL << 1)
 #define SMSTATEEN0_JVT      (1ULL << 2)
+#define SMSTATEEN0_P1P13    (1ULL << 56)
 #define SMSTATEEN0_HSCONTXT (1ULL << 57)
 #define SMSTATEEN0_IMSIC    (1ULL << 58)
 #define SMSTATEEN0_AIA      (1ULL << 59)
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 58ef7079dc..3dcfb343fe 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -2245,6 +2245,10 @@ static RISCVException write_mstateen0(CPURISCVState *env, int csrno,
         wr_mask |= SMSTATEEN0_FCSR;
     }
 
+    if (env->priv_ver >= PRIV_VERSION_1_13_0) {
+        wr_mask |= SMSTATEEN0_P1P13;
+    }
+
     return write_mstateen(env, csrno, wr_mask, new_val);
 }
 
@@ -2280,6 +2284,10 @@ static RISCVException write_mstateen0h(CPURISCVState *env, int csrno,
 {
     uint64_t wr_mask = SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG;
 
+    if (env->priv_ver >= PRIV_VERSION_1_13_0) {
+        wr_mask |= SMSTATEEN0_P1P13;
+    }
+
     return write_mstateenh(env, csrno, wr_mask, new_val);
 }
 
-- 
2.34.1

Re: [PATCH v3 4/6] target/riscv: Add 'P1P13' bit in SMSTATEEN0

[Alistair Francis]

On Tue, Jun 4, 2024 at 4:24 PM Fea.Wang <fea.wang@sifive.com> wrote:
>
> Based on privilege 1.13 spec, there should be a bit56 for 'P1P13' in
> mstateen0 that controls access to the hedeleg.
>
> Signed-off-by: Fea.Wang <fea.wang@sifive.com>
> Reviewed-by: Frank Chang <frank.chang@sifive.com>
> Reviewed-by: Weiwei Li <liwei1518@gmail.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  target/riscv/cpu_bits.h | 1 +
>  target/riscv/csr.c      | 8 ++++++++
>  2 files changed, 9 insertions(+)
>
> diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
> index 74318a925c..28bd3fb0b4 100644
> --- a/target/riscv/cpu_bits.h
> +++ b/target/riscv/cpu_bits.h
> @@ -315,6 +315,7 @@
>  #define SMSTATEEN0_CS       (1ULL << 0)
>  #define SMSTATEEN0_FCSR     (1ULL << 1)
>  #define SMSTATEEN0_JVT      (1ULL << 2)
> +#define SMSTATEEN0_P1P13    (1ULL << 56)
>  #define SMSTATEEN0_HSCONTXT (1ULL << 57)
>  #define SMSTATEEN0_IMSIC    (1ULL << 58)
>  #define SMSTATEEN0_AIA      (1ULL << 59)
> diff --git a/target/riscv/csr.c b/target/riscv/csr.c
> index 58ef7079dc..3dcfb343fe 100644
> --- a/target/riscv/csr.c
> +++ b/target/riscv/csr.c
> @@ -2245,6 +2245,10 @@ static RISCVException write_mstateen0(CPURISCVState *env, int csrno,
>          wr_mask |= SMSTATEEN0_FCSR;
>      }
>
> +    if (env->priv_ver >= PRIV_VERSION_1_13_0) {
> +        wr_mask |= SMSTATEEN0_P1P13;
> +    }
> +
>      return write_mstateen(env, csrno, wr_mask, new_val);
>  }
>
> @@ -2280,6 +2284,10 @@ static RISCVException write_mstateen0h(CPURISCVState *env, int csrno,
>  {
>      uint64_t wr_mask = SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG;
>
> +    if (env->priv_ver >= PRIV_VERSION_1_13_0) {
> +        wr_mask |= SMSTATEEN0_P1P13;
> +    }
> +
>      return write_mstateenh(env, csrno, wr_mask, new_val);
>  }
>
> --
> 2.34.1
>
>

[PATCH v3 5/6] target/riscv: Add MEDELEGH, HEDELEGH csrs for RV32

[Fea.Wang]

Based on privileged spec 1.13, the RV32 needs to implement MEDELEGH
and HEDELEGH for exception codes 32-47 for reserving and exception codes
48-63 for custom use. Add the CSR number though the implementation is
just reading zero and writing ignore. Besides, for accessing HEDELEGH, it
should be controlled by mstateen0 'P1P13' bit.

Signed-off-by: Fea.Wang <fea.wang@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_bits.h |  2 ++
 target/riscv/csr.c      | 31 +++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 28bd3fb0b4..f888025c59 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -156,6 +156,8 @@
 
 /* 32-bit only */
 #define CSR_MSTATUSH        0x310
+#define CSR_MEDELEGH        0x312
+#define CSR_HEDELEGH        0x612
 
 /* Machine Trap Handling */
 #define CSR_MSCRATCH        0x340
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 3dcfb343fe..d480feb94d 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -3222,6 +3222,33 @@ static RISCVException write_hedeleg(CPURISCVState *env, int csrno,
     return RISCV_EXCP_NONE;
 }
 
+static RISCVException read_hedelegh(CPURISCVState *env, int csrno,
+                                   target_ulong *val)
+{
+    RISCVException ret;
+    ret = smstateen_acc_ok(env, 0, SMSTATEEN0_P1P13);
+    if (ret != RISCV_EXCP_NONE) {
+        return ret;
+    }
+
+    /* Reserved, now read zero */
+    *val = 0;
+    return RISCV_EXCP_NONE;
+}
+
+static RISCVException write_hedelegh(CPURISCVState *env, int csrno,
+                                    target_ulong val)
+{
+    RISCVException ret;
+    ret = smstateen_acc_ok(env, 0, SMSTATEEN0_P1P13);
+    if (ret != RISCV_EXCP_NONE) {
+        return ret;
+    }
+
+    /* Reserved, now write ignore */
+    return RISCV_EXCP_NONE;
+}
+
 static RISCVException rmw_hvien64(CPURISCVState *env, int csrno,
                                     uint64_t *ret_val,
                                     uint64_t new_val, uint64_t wr_mask)
@@ -4626,6 +4653,10 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
 
     [CSR_MSTATUSH]    = { "mstatush",   any32, read_mstatush,
                           write_mstatush                                   },
+    [CSR_MEDELEGH]    = { "medelegh",   any32, read_zero, write_ignore,
+                          .min_priv_ver = PRIV_VERSION_1_13_0              },
+    [CSR_HEDELEGH]    = { "hedelegh",   hmode32, read_hedelegh, write_hedelegh,
+                          .min_priv_ver = PRIV_VERSION_1_13_0              },
 
     /* Machine Trap Handling */
     [CSR_MSCRATCH] = { "mscratch", any,  read_mscratch, write_mscratch,
-- 
2.34.1

[PATCH v3 6/6] target/riscv: Reserve exception codes for sw-check and hw-err

[Fea.Wang]

Based on the priv-1.13.0, add the exception codes for Software-check and
Hardware-error.

Signed-off-by: Fea.Wang <fea.wang@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu_bits.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index f888025c59..f037f727d9 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -673,6 +673,8 @@ typedef enum RISCVException {
     RISCV_EXCP_INST_PAGE_FAULT = 0xc, /* since: priv-1.10.0 */
     RISCV_EXCP_LOAD_PAGE_FAULT = 0xd, /* since: priv-1.10.0 */
     RISCV_EXCP_STORE_PAGE_FAULT = 0xf, /* since: priv-1.10.0 */
+    RISCV_EXCP_SW_CHECK = 0x12, /* since: priv-1.13.0 */
+    RISCV_EXCP_HW_ERR = 0x13, /* since: priv-1.13.0 */
     RISCV_EXCP_INST_GUEST_PAGE_FAULT = 0x14,
     RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT = 0x15,
     RISCV_EXCP_VIRT_INSTRUCTION_FAULT = 0x16,
-- 
2.34.1