[v1,02/28] target/riscv: Add the virtulisation mode
diff mbox series

Message ID 1c1d359caa6633349158debc38e07156a10b63e8.1566603412.git.alistair.francis@wdc.com
State New
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Series
  • Untitled series #127095
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Commit Message

Alistair Francis Aug. 23, 2019, 11:37 p.m. UTC
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h        |  4 ++++
 target/riscv/cpu_bits.h   |  6 ++++++
 target/riscv/cpu_helper.c | 23 +++++++++++++++++++++++
 3 files changed, 33 insertions(+)

Comments

Chih-Min Chao Aug. 27, 2019, 3:44 p.m. UTC | #1
On Sat, Aug 24, 2019 at 7:41 AM Alistair Francis <alistair.francis@wdc.com>
wrote:

> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
> ---
>  target/riscv/cpu.h        |  4 ++++
>  target/riscv/cpu_bits.h   |  6 ++++++
>  target/riscv/cpu_helper.c | 23 +++++++++++++++++++++++
>  3 files changed, 33 insertions(+)
>
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index 7f54fb8c87..0ef1ecb0e0 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -117,6 +117,8 @@ struct CPURISCVState {
>
>  #ifndef CONFIG_USER_ONLY
>      target_ulong priv;
> +    /* This contains QEMU specific information about the virt state. */
> +    target_ulong virt;
>      target_ulong resetvec;
>
>      target_ulong mhartid;
> @@ -257,6 +259,8 @@ int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t
> *buf, int reg);
>  int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
>  bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
>  bool riscv_cpu_fp_enabled(CPURISCVState *env);
> +bool riscv_cpu_virt_enabled(CPURISCVState *env);
> +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
>  int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
>  hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
>  void  riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
> diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
> index e99834856c..1fbde516be 100644
> --- a/target/riscv/cpu_bits.h
> +++ b/target/riscv/cpu_bits.h
> @@ -422,6 +422,12 @@
>  #define PRV_H 2 /* Reserved */
>  #define PRV_M 3
>
> +/* Virtulisation modes */
> +#define VIRT_OFF            0
> +#define VIRT_ON             1
> +#define VIRT_MODE_SHIFT     0
> +#define VIRT_MODE_MASK      (1 << VIRT_MODE_SHIFT)
> +
>
 /* RV32 satp CSR field masks */
>  #define SATP32_MODE         0x80000000
>  #define SATP32_ASID         0x7fc00000
> diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
> index 225e407cff..7b0bb14c01 100644
> --- a/target/riscv/cpu_helper.c
> +++ b/target/riscv/cpu_helper.c
> @@ -81,6 +81,29 @@ bool riscv_cpu_fp_enabled(CPURISCVState *env)
>      return false;
>  }
>
> +bool riscv_cpu_virt_enabled(CPURISCVState *env)
> +{
> +    bool tmp;
> +
> +    if (!riscv_has_ext(env, RVH)) {
> +        return false;
> +    }
> +
> +    tmp = (env->virt & VIRT_MODE_MASK) >> VIRT_MODE_SHIFT;
> +
> +    return tmp == VIRT_ON;
> +}
> +
> +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
> +{
> +    if (!riscv_has_ext(env, RVH)) {
> +        return;
> +    }
> +
> +    env->virt &= ~VIRT_MODE_MASK;
> +    env->virt |= enable << VIRT_MODE_SHIFT;
> +}
> +
>  int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts)
>  {
>      CPURISCVState *env = &cpu->env;
> --
> 2.22.0
>
> Why not to use get_field and set_field though it is not a real register
but an internal state

#define VIRT_ONOFF            0x01
#define VIRT_OFF             0
#define VIRT_ON             1

access
       get_field(env->virt, VIRT_ONOFF);
       set_field(env->virt, VIRT_ONOFF, enable);


chihmin
Alistair Francis Aug. 28, 2019, 12:08 a.m. UTC | #2
On Tue, Aug 27, 2019 at 8:44 AM Chih-Min Chao <chihmin.chao@sifive.com> wrote:
>
>
>
> On Sat, Aug 24, 2019 at 7:41 AM Alistair Francis <alistair.francis@wdc.com> wrote:
>>
>> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
>> ---
>>  target/riscv/cpu.h        |  4 ++++
>>  target/riscv/cpu_bits.h   |  6 ++++++
>>  target/riscv/cpu_helper.c | 23 +++++++++++++++++++++++
>>  3 files changed, 33 insertions(+)
>>
>> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
>> index 7f54fb8c87..0ef1ecb0e0 100644
>> --- a/target/riscv/cpu.h
>> +++ b/target/riscv/cpu.h
>> @@ -117,6 +117,8 @@ struct CPURISCVState {
>>
>>  #ifndef CONFIG_USER_ONLY
>>      target_ulong priv;
>> +    /* This contains QEMU specific information about the virt state. */
>> +    target_ulong virt;
>>      target_ulong resetvec;
>>
>>      target_ulong mhartid;
>> @@ -257,6 +259,8 @@ int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
>>  int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
>>  bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
>>  bool riscv_cpu_fp_enabled(CPURISCVState *env);
>> +bool riscv_cpu_virt_enabled(CPURISCVState *env);
>> +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
>>  int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
>>  hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
>>  void  riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
>> diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
>> index e99834856c..1fbde516be 100644
>> --- a/target/riscv/cpu_bits.h
>> +++ b/target/riscv/cpu_bits.h
>> @@ -422,6 +422,12 @@
>>  #define PRV_H 2 /* Reserved */
>>  #define PRV_M 3
>>
>> +/* Virtulisation modes */
>> +#define VIRT_OFF            0
>> +#define VIRT_ON             1
>> +#define VIRT_MODE_SHIFT     0
>> +#define VIRT_MODE_MASK      (1 << VIRT_MODE_SHIFT)
>> +
>>
>>  /* RV32 satp CSR field masks */
>>  #define SATP32_MODE         0x80000000
>>  #define SATP32_ASID         0x7fc00000
>> diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
>> index 225e407cff..7b0bb14c01 100644
>> --- a/target/riscv/cpu_helper.c
>> +++ b/target/riscv/cpu_helper.c
>> @@ -81,6 +81,29 @@ bool riscv_cpu_fp_enabled(CPURISCVState *env)
>>      return false;
>>  }
>>
>> +bool riscv_cpu_virt_enabled(CPURISCVState *env)
>> +{
>> +    bool tmp;
>> +
>> +    if (!riscv_has_ext(env, RVH)) {
>> +        return false;
>> +    }
>> +
>> +    tmp = (env->virt & VIRT_MODE_MASK) >> VIRT_MODE_SHIFT;
>> +
>> +    return tmp == VIRT_ON;
>> +}
>> +
>> +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
>> +{
>> +    if (!riscv_has_ext(env, RVH)) {
>> +        return;
>> +    }
>> +
>> +    env->virt &= ~VIRT_MODE_MASK;
>> +    env->virt |= enable << VIRT_MODE_SHIFT;
>> +}
>> +
>>  int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts)
>>  {
>>      CPURISCVState *env = &cpu->env;
>> --
>> 2.22.0
>>
> Why not to use get_field and set_field though it is not a real register but an internal state
>
> #define VIRT_ONOFF            0x01
> #define VIRT_OFF             0
> #define VIRT_ON             1
>
> access
>        get_field(env->virt, VIRT_ONOFF);
>        set_field(env->virt, VIRT_ONOFF, enable);

Good idea, I have updated this.

Alistair

>
>
> chihmin
Palmer Dabbelt Sept. 10, 2019, 1:44 p.m. UTC | #3
On Fri, 23 Aug 2019 16:37:54 PDT (-0700), Alistair Francis wrote:
> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
> ---
>  target/riscv/cpu.h        |  4 ++++
>  target/riscv/cpu_bits.h   |  6 ++++++
>  target/riscv/cpu_helper.c | 23 +++++++++++++++++++++++
>  3 files changed, 33 insertions(+)
>
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index 7f54fb8c87..0ef1ecb0e0 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -117,6 +117,8 @@ struct CPURISCVState {
>
>  #ifndef CONFIG_USER_ONLY
>      target_ulong priv;
> +    /* This contains QEMU specific information about the virt state. */
> +    target_ulong virt;
>      target_ulong resetvec;
>
>      target_ulong mhartid;
> @@ -257,6 +259,8 @@ int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
>  int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
>  bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
>  bool riscv_cpu_fp_enabled(CPURISCVState *env);
> +bool riscv_cpu_virt_enabled(CPURISCVState *env);
> +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
>  int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
>  hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
>  void  riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
> diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
> index e99834856c..1fbde516be 100644
> --- a/target/riscv/cpu_bits.h
> +++ b/target/riscv/cpu_bits.h
> @@ -422,6 +422,12 @@
>  #define PRV_H 2 /* Reserved */
>  #define PRV_M 3
>
> +/* Virtulisation modes */
> +#define VIRT_OFF            0
> +#define VIRT_ON             1
> +#define VIRT_MODE_SHIFT     0
> +#define VIRT_MODE_MASK      (1 << VIRT_MODE_SHIFT)
> +
>  /* RV32 satp CSR field masks */
>  #define SATP32_MODE         0x80000000
>  #define SATP32_ASID         0x7fc00000
> diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
> index 225e407cff..7b0bb14c01 100644
> --- a/target/riscv/cpu_helper.c
> +++ b/target/riscv/cpu_helper.c
> @@ -81,6 +81,29 @@ bool riscv_cpu_fp_enabled(CPURISCVState *env)
>      return false;
>  }
>
> +bool riscv_cpu_virt_enabled(CPURISCVState *env)
> +{
> +    bool tmp;
> +
> +    if (!riscv_has_ext(env, RVH)) {
> +        return false;
> +    }
> +
> +    tmp = (env->virt & VIRT_MODE_MASK) >> VIRT_MODE_SHIFT;
> +
> +    return tmp == VIRT_ON;
> +}

extract64() is a bit cleaner.

> +
> +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
> +{
> +    if (!riscv_has_ext(env, RVH)) {
> +        return;
> +    }
> +
> +    env->virt &= ~VIRT_MODE_MASK;
> +    env->virt |= enable << VIRT_MODE_SHIFT;
> +}
> +
>  int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts)
>  {
>      CPURISCVState *env = &cpu->env;

Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Alistair Francis Sept. 16, 2019, 3:57 p.m. UTC | #4
On Tue, Sep 10, 2019 at 6:44 AM Palmer Dabbelt <palmer@sifive.com> wrote:
>
> On Fri, 23 Aug 2019 16:37:54 PDT (-0700), Alistair Francis wrote:
> > Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
> > ---
> >  target/riscv/cpu.h        |  4 ++++
> >  target/riscv/cpu_bits.h   |  6 ++++++
> >  target/riscv/cpu_helper.c | 23 +++++++++++++++++++++++
> >  3 files changed, 33 insertions(+)
> >
> > diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> > index 7f54fb8c87..0ef1ecb0e0 100644
> > --- a/target/riscv/cpu.h
> > +++ b/target/riscv/cpu.h
> > @@ -117,6 +117,8 @@ struct CPURISCVState {
> >
> >  #ifndef CONFIG_USER_ONLY
> >      target_ulong priv;
> > +    /* This contains QEMU specific information about the virt state. */
> > +    target_ulong virt;
> >      target_ulong resetvec;
> >
> >      target_ulong mhartid;
> > @@ -257,6 +259,8 @@ int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
> >  int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
> >  bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
> >  bool riscv_cpu_fp_enabled(CPURISCVState *env);
> > +bool riscv_cpu_virt_enabled(CPURISCVState *env);
> > +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
> >  int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
> >  hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
> >  void  riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
> > diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
> > index e99834856c..1fbde516be 100644
> > --- a/target/riscv/cpu_bits.h
> > +++ b/target/riscv/cpu_bits.h
> > @@ -422,6 +422,12 @@
> >  #define PRV_H 2 /* Reserved */
> >  #define PRV_M 3
> >
> > +/* Virtulisation modes */
> > +#define VIRT_OFF            0
> > +#define VIRT_ON             1
> > +#define VIRT_MODE_SHIFT     0
> > +#define VIRT_MODE_MASK      (1 << VIRT_MODE_SHIFT)
> > +
> >  /* RV32 satp CSR field masks */
> >  #define SATP32_MODE         0x80000000
> >  #define SATP32_ASID         0x7fc00000
> > diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
> > index 225e407cff..7b0bb14c01 100644
> > --- a/target/riscv/cpu_helper.c
> > +++ b/target/riscv/cpu_helper.c
> > @@ -81,6 +81,29 @@ bool riscv_cpu_fp_enabled(CPURISCVState *env)
> >      return false;
> >  }
> >
> > +bool riscv_cpu_virt_enabled(CPURISCVState *env)
> > +{
> > +    bool tmp;
> > +
> > +    if (!riscv_has_ext(env, RVH)) {
> > +        return false;
> > +    }
> > +
> > +    tmp = (env->virt & VIRT_MODE_MASK) >> VIRT_MODE_SHIFT;
> > +
> > +    return tmp == VIRT_ON;
> > +}
>
> extract64() is a bit cleaner.

I have already changed it to get_field() and set_field().

>
> > +
> > +void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
> > +{
> > +    if (!riscv_has_ext(env, RVH)) {
> > +        return;
> > +    }
> > +
> > +    env->virt &= ~VIRT_MODE_MASK;
> > +    env->virt |= enable << VIRT_MODE_SHIFT;
> > +}
> > +
> >  int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts)
> >  {
> >      CPURISCVState *env = &cpu->env;
>
> Reviewed-by: Palmer Dabbelt <palmer@sifive.com>

This patch is a little out of date, so I'll not include your RB line in the v2.

Alistair

Patch
diff mbox series

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 7f54fb8c87..0ef1ecb0e0 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -117,6 +117,8 @@  struct CPURISCVState {
 
 #ifndef CONFIG_USER_ONLY
     target_ulong priv;
+    /* This contains QEMU specific information about the virt state. */
+    target_ulong virt;
     target_ulong resetvec;
 
     target_ulong mhartid;
@@ -257,6 +259,8 @@  int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
 bool riscv_cpu_fp_enabled(CPURISCVState *env);
+bool riscv_cpu_virt_enabled(CPURISCVState *env);
+void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 void  riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index e99834856c..1fbde516be 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -422,6 +422,12 @@ 
 #define PRV_H 2 /* Reserved */
 #define PRV_M 3
 
+/* Virtulisation modes */
+#define VIRT_OFF            0
+#define VIRT_ON             1
+#define VIRT_MODE_SHIFT     0
+#define VIRT_MODE_MASK      (1 << VIRT_MODE_SHIFT)
+
 /* RV32 satp CSR field masks */
 #define SATP32_MODE         0x80000000
 #define SATP32_ASID         0x7fc00000
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 225e407cff..7b0bb14c01 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -81,6 +81,29 @@  bool riscv_cpu_fp_enabled(CPURISCVState *env)
     return false;
 }
 
+bool riscv_cpu_virt_enabled(CPURISCVState *env)
+{
+    bool tmp;
+
+    if (!riscv_has_ext(env, RVH)) {
+        return false;
+    }
+
+    tmp = (env->virt & VIRT_MODE_MASK) >> VIRT_MODE_SHIFT;
+
+    return tmp == VIRT_ON;
+}
+
+void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
+{
+    if (!riscv_has_ext(env, RVH)) {
+        return;
+    }
+
+    env->virt &= ~VIRT_MODE_MASK;
+    env->virt |= enable << VIRT_MODE_SHIFT;
+}
+
 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts)
 {
     CPURISCVState *env = &cpu->env;