diff mbox series

[v8,01/78] target/riscv: fix TB_FLAGS bits overlapping bug for rvv/rvh

Message ID 20211015074627.3957162-2-frank.chang@sifive.com (mailing list archive)
State New, archived
Headers show
Series support vector extension v1.0 | expand

Commit Message

Frank Chang Oct. 15, 2021, 7:45 a.m. UTC 
From: Frank Chang <frank.chang@sifive.com>

TB_FLAGS mem_idx bits was extended from 2 bits to 3 bits in
commit: c445593, but other TB_FLAGS bits for rvv and rvh were
not shift as well so these bits may overlap with each other when
rvv is enabled.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
---
 target/riscv/cpu.h       | 14 +++++++-------
 target/riscv/translate.c |  2 +-
 2 files changed, 8 insertions(+), 8 deletions(-)

Comments

Richard Henderson Oct. 16, 2021, 3:04 a.m. UTC | #1 
On 10/15/21 12:45 AM, frank.chang@sifive.com wrote:
> From: Frank Chang<frank.chang@sifive.com>
> 
> TB_FLAGS mem_idx bits was extended from 2 bits to 3 bits in
> commit: c445593, but other TB_FLAGS bits for rvv and rvh were
> not shift as well so these bits may overlap with each other when
> rvv is enabled.
> 
> Signed-off-by: Frank Chang<frank.chang@sifive.com>
> ---
>   target/riscv/cpu.h       | 14 +++++++-------
>   target/riscv/translate.c |  2 +-
>   2 files changed, 8 insertions(+), 8 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
Alistair Francis Oct. 17, 2021, 10:55 p.m. UTC | #2 
On Fri, Oct 15, 2021 at 5:50 PM <frank.chang@sifive.com> wrote:
>
> From: Frank Chang <frank.chang@sifive.com>
>
> TB_FLAGS mem_idx bits was extended from 2 bits to 3 bits in
> commit: c445593, but other TB_FLAGS bits for rvv and rvh were
> not shift as well so these bits may overlap with each other when
> rvv is enabled.
>
> Signed-off-by: Frank Chang <frank.chang@sifive.com>

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

Alistair

> ---
>  target/riscv/cpu.h       | 14 +++++++-------
>  target/riscv/translate.c |  2 +-
>  2 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index d70f63ddfe6..d63a08b6e4c 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -380,7 +380,6 @@ void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env,
>  target_ulong riscv_cpu_get_fflags(CPURISCVState *env);
>  void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
>
> -#define TB_FLAGS_MMU_MASK   7
>  #define TB_FLAGS_PRIV_MMU_MASK                3
>  #define TB_FLAGS_PRIV_HYP_ACCESS_MASK   (1 << 2)
>  #define TB_FLAGS_MSTATUS_FS MSTATUS_FS
> @@ -389,13 +388,14 @@ typedef CPURISCVState CPUArchState;
>  typedef RISCVCPU ArchCPU;
>  #include "exec/cpu-all.h"
>
> -FIELD(TB_FLAGS, VL_EQ_VLMAX, 2, 1)
> -FIELD(TB_FLAGS, LMUL, 3, 2)
> -FIELD(TB_FLAGS, SEW, 5, 3)
> -FIELD(TB_FLAGS, VILL, 8, 1)
> +FIELD(TB_FLAGS, MEM_IDX, 0, 3)
> +FIELD(TB_FLAGS, VL_EQ_VLMAX, 3, 1)
> +FIELD(TB_FLAGS, LMUL, 4, 2)
> +FIELD(TB_FLAGS, SEW, 6, 3)
> +FIELD(TB_FLAGS, VILL, 9, 1)
>  /* Is a Hypervisor instruction load/store allowed? */
> -FIELD(TB_FLAGS, HLSX, 9, 1)
> -FIELD(TB_FLAGS, MSTATUS_HS_FS, 10, 2)
> +FIELD(TB_FLAGS, HLSX, 10, 1)
> +FIELD(TB_FLAGS, MSTATUS_HS_FS, 11, 2)
>
>  bool riscv_cpu_is_32bit(CPURISCVState *env);
>
> diff --git a/target/riscv/translate.c b/target/riscv/translate.c
> index f23bc919c08..a7a66cf9db1 100644
> --- a/target/riscv/translate.c
> +++ b/target/riscv/translate.c
> @@ -544,7 +544,7 @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
>      uint32_t tb_flags = ctx->base.tb->flags;
>
>      ctx->pc_succ_insn = ctx->base.pc_first;
> -    ctx->mem_idx = tb_flags & TB_FLAGS_MMU_MASK;
> +    ctx->mem_idx = FIELD_EX32(tb_flags, TB_FLAGS, MEM_IDX);
>      ctx->mstatus_fs = tb_flags & TB_FLAGS_MSTATUS_FS;
>      ctx->priv_ver = env->priv_ver;
>  #if !defined(CONFIG_USER_ONLY)
> --
> 2.25.1
>
>
Richard Henderson Oct. 18, 2021, 5:38 a.m. UTC | #3 
On 10/17/21 3:55 PM, Alistair Francis wrote:
> On Fri, Oct 15, 2021 at 5:50 PM <frank.chang@sifive.com> wrote:
>>
>> From: Frank Chang <frank.chang@sifive.com>
>>
>> TB_FLAGS mem_idx bits was extended from 2 bits to 3 bits in
>> commit: c445593, but other TB_FLAGS bits for rvv and rvh were
>> not shift as well so these bits may overlap with each other when
>> rvv is enabled.
>>
>> Signed-off-by: Frank Chang <frank.chang@sifive.com>
> 
> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

BTW, Alistair, I think this bug fix should be cherry-picked out of this patch set right away.


r~
Alistair Francis Oct. 18, 2021, 6:01 a.m. UTC | #4 
On Fri, Oct 15, 2021 at 5:50 PM <frank.chang@sifive.com> wrote:
>
> From: Frank Chang <frank.chang@sifive.com>
>
> TB_FLAGS mem_idx bits was extended from 2 bits to 3 bits in
> commit: c445593, but other TB_FLAGS bits for rvv and rvh were
> not shift as well so these bits may overlap with each other when
> rvv is enabled.
>
> Signed-off-by: Frank Chang <frank.chang@sifive.com>

Thanks!

Applied to this patch to riscv-to-apply.next

Alistair

> ---
>  target/riscv/cpu.h       | 14 +++++++-------
>  target/riscv/translate.c |  2 +-
>  2 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index d70f63ddfe6..d63a08b6e4c 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -380,7 +380,6 @@ void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env,
>  target_ulong riscv_cpu_get_fflags(CPURISCVState *env);
>  void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
>
> -#define TB_FLAGS_MMU_MASK   7
>  #define TB_FLAGS_PRIV_MMU_MASK                3
>  #define TB_FLAGS_PRIV_HYP_ACCESS_MASK   (1 << 2)
>  #define TB_FLAGS_MSTATUS_FS MSTATUS_FS
> @@ -389,13 +388,14 @@ typedef CPURISCVState CPUArchState;
>  typedef RISCVCPU ArchCPU;
>  #include "exec/cpu-all.h"
>
> -FIELD(TB_FLAGS, VL_EQ_VLMAX, 2, 1)
> -FIELD(TB_FLAGS, LMUL, 3, 2)
> -FIELD(TB_FLAGS, SEW, 5, 3)
> -FIELD(TB_FLAGS, VILL, 8, 1)
> +FIELD(TB_FLAGS, MEM_IDX, 0, 3)
> +FIELD(TB_FLAGS, VL_EQ_VLMAX, 3, 1)
> +FIELD(TB_FLAGS, LMUL, 4, 2)
> +FIELD(TB_FLAGS, SEW, 6, 3)
> +FIELD(TB_FLAGS, VILL, 9, 1)
>  /* Is a Hypervisor instruction load/store allowed? */
> -FIELD(TB_FLAGS, HLSX, 9, 1)
> -FIELD(TB_FLAGS, MSTATUS_HS_FS, 10, 2)
> +FIELD(TB_FLAGS, HLSX, 10, 1)
> +FIELD(TB_FLAGS, MSTATUS_HS_FS, 11, 2)
>
>  bool riscv_cpu_is_32bit(CPURISCVState *env);
>
> diff --git a/target/riscv/translate.c b/target/riscv/translate.c
> index f23bc919c08..a7a66cf9db1 100644
> --- a/target/riscv/translate.c
> +++ b/target/riscv/translate.c
> @@ -544,7 +544,7 @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
>      uint32_t tb_flags = ctx->base.tb->flags;
>
>      ctx->pc_succ_insn = ctx->base.pc_first;
> -    ctx->mem_idx = tb_flags & TB_FLAGS_MMU_MASK;
> +    ctx->mem_idx = FIELD_EX32(tb_flags, TB_FLAGS, MEM_IDX);
>      ctx->mstatus_fs = tb_flags & TB_FLAGS_MSTATUS_FS;
>      ctx->priv_ver = env->priv_ver;
>  #if !defined(CONFIG_USER_ONLY)
> --
> 2.25.1
>
>
diff mbox series

Patch

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index d70f63ddfe6..d63a08b6e4c 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -380,7 +380,6 @@  void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env,
 target_ulong riscv_cpu_get_fflags(CPURISCVState *env);
 void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
 
-#define TB_FLAGS_MMU_MASK   7
 #define TB_FLAGS_PRIV_MMU_MASK                3
 #define TB_FLAGS_PRIV_HYP_ACCESS_MASK   (1 << 2)
 #define TB_FLAGS_MSTATUS_FS MSTATUS_FS
@@ -389,13 +388,14 @@  typedef CPURISCVState CPUArchState;
 typedef RISCVCPU ArchCPU;
 #include "exec/cpu-all.h"
 
-FIELD(TB_FLAGS, VL_EQ_VLMAX, 2, 1)
-FIELD(TB_FLAGS, LMUL, 3, 2)
-FIELD(TB_FLAGS, SEW, 5, 3)
-FIELD(TB_FLAGS, VILL, 8, 1)
+FIELD(TB_FLAGS, MEM_IDX, 0, 3)
+FIELD(TB_FLAGS, VL_EQ_VLMAX, 3, 1)
+FIELD(TB_FLAGS, LMUL, 4, 2)
+FIELD(TB_FLAGS, SEW, 6, 3)
+FIELD(TB_FLAGS, VILL, 9, 1)
 /* Is a Hypervisor instruction load/store allowed? */
-FIELD(TB_FLAGS, HLSX, 9, 1)
-FIELD(TB_FLAGS, MSTATUS_HS_FS, 10, 2)
+FIELD(TB_FLAGS, HLSX, 10, 1)
+FIELD(TB_FLAGS, MSTATUS_HS_FS, 11, 2)
 
 bool riscv_cpu_is_32bit(CPURISCVState *env);
 
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index f23bc919c08..a7a66cf9db1 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -544,7 +544,7 @@  static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
     uint32_t tb_flags = ctx->base.tb->flags;
 
     ctx->pc_succ_insn = ctx->base.pc_first;
-    ctx->mem_idx = tb_flags & TB_FLAGS_MMU_MASK;
+    ctx->mem_idx = FIELD_EX32(tb_flags, TB_FLAGS, MEM_IDX);
     ctx->mstatus_fs = tb_flags & TB_FLAGS_MSTATUS_FS;
     ctx->priv_ver = env->priv_ver;
 #if !defined(CONFIG_USER_ONLY)