Re: [Qemu-devel] [PATCH v1 04/16] target-arm: Make far_el1 an array

["Alex Bennée" <alex.bennee@linaro.org>]

Edgar E. Iglesias writes:

> From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
>
> No functional change.
> Prepares for future additions of the EL2 and 3 versions of this reg.
>
> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
> ---
>  target-arm/cpu.c        |  2 +-
>  target-arm/cpu.h        |  2 +-
>  target-arm/helper-a64.c |  4 ++--
>  target-arm/helper.c     | 12 ++++++------
>  4 files changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/target-arm/cpu.c b/target-arm/cpu.c
> index 794dcb9..93bd6a0 100644
> --- a/target-arm/cpu.c
> +++ b/target-arm/cpu.c
> @@ -446,7 +446,7 @@ static void arm1026_initfn(Object *obj)
>          ARMCPRegInfo ifar = {
>              .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
>              .access = PL1_RW,
> -            .fieldoffset = offsetofhigh32(CPUARMState, cp15.far_el1),
> +            .fieldoffset = offsetofhigh32(CPUARMState, cp15.far_el[1]),
>              .resetvalue = 0
>          };
>          define_one_arm_cp_reg(cpu, &ifar);
> diff --git a/target-arm/cpu.h b/target-arm/cpu.h
> index 8d04385..172a631 100644
> --- a/target-arm/cpu.h
> +++ b/target-arm/cpu.h
> @@ -187,7 +187,7 @@ typedef struct CPUARMState {
>          uint32_t ifsr_el2; /* Fault status registers.  */
>          uint64_t esr_el[2];
>          uint32_t c6_region[8]; /* MPU base/size registers.  */
> -        uint64_t far_el1; /* Fault address registers.  */
> +        uint64_t far_el[2]; /* Fault address registers.  */

If there are EL1, 2 and 3 versions shouldn't this be [3]?

>          uint64_t par_el1;  /* Translation result. */
>          uint32_t c9_insn; /* Cache lockdown registers.  */
>          uint32_t c9_data;
> diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c
> index bc153cb..d647441 100644
> --- a/target-arm/helper-a64.c
> +++ b/target-arm/helper-a64.c
> @@ -465,13 +465,13 @@ void aarch64_cpu_do_interrupt(CPUState *cs)
>      }
>  
>      env->cp15.esr_el[1] = env->exception.syndrome;
> -    env->cp15.far_el1 = env->exception.vaddress;
> +    env->cp15.far_el[1] = env->exception.vaddress;
>  
>      switch (cs->exception_index) {
>      case EXCP_PREFETCH_ABORT:
>      case EXCP_DATA_ABORT:
>          qemu_log_mask(CPU_LOG_INT, "...with FAR 0x%" PRIx64 "\n",
> -                      env->cp15.far_el1);
> +                      env->cp15.far_el[1]);

As there is no FAR_EL0 shouldn't this be the first in the array (ie. 0?)

>          break;
>      case EXCP_BKPT:
>      case EXCP_UDEF:
> diff --git a/target-arm/helper.c b/target-arm/helper.c
> index ec031f5..5350a99 100644
> --- a/target-arm/helper.c
> +++ b/target-arm/helper.c
> @@ -521,7 +521,7 @@ static const ARMCPRegInfo v6_cp_reginfo[] = {
>        .access = PL0_W, .type = ARM_CP_NOP },
>      { .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2,
>        .access = PL1_RW,
> -      .fieldoffset = offsetofhigh32(CPUARMState, cp15.far_el1),
> +      .fieldoffset = offsetofhigh32(CPUARMState, cp15.far_el[1]),
>        .resetvalue = 0, },
>      /* Watchpoint Fault Address Register : should actually only be present
>       * for 1136, 1176, 11MPCore.
> @@ -1505,7 +1505,7 @@ static const ARMCPRegInfo vmsa_cp_reginfo[] = {
>      /* 64-bit FAR; this entry also gives us the AArch32 DFAR */
>      { .name = "FAR_EL1", .state = ARM_CP_STATE_BOTH,
>        .opc0 = 3, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
> -      .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el1),
> +      .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el[1]),
>        .resetvalue = 0, },
>      REGINFO_SENTINEL
>  };
> @@ -3414,8 +3414,8 @@ void arm_cpu_do_interrupt(CPUState *cs)
>          /* Fall through to prefetch abort.  */
>      case EXCP_PREFETCH_ABORT:
>          env->cp15.ifsr_el2 = env->exception.fsr;
> -        env->cp15.far_el1 = deposit64(env->cp15.far_el1, 32, 32,
> -                                      env->exception.vaddress);
> +        env->cp15.far_el[1] = deposit64(env->cp15.far_el[1], 32, 32,
> +                                        env->exception.vaddress);
>          qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n",
>                        env->cp15.ifsr_el2, (uint32_t)env->exception.vaddress);
>          new_mode = ARM_CPU_MODE_ABT;
> @@ -3425,8 +3425,8 @@ void arm_cpu_do_interrupt(CPUState *cs)
>          break;
>      case EXCP_DATA_ABORT:
>          env->cp15.esr_el[1] = env->exception.fsr;
> -        env->cp15.far_el1 = deposit64(env->cp15.far_el1, 0, 32,
> -                                      env->exception.vaddress);
> +        env->cp15.far_el[1] = deposit64(env->cp15.far_el[1], 0, 32,
> +                                        env->exception.vaddress);
>          qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n",
>                        (uint32_t)env->cp15.esr_el[1],
>                        (uint32_t)env->exception.vaddress);

-- 
Alex Bennée