Re: [Qemu-devel] [PATCH v2 05/18] target-arm: Add ARMCPU fields for GIC CPU i/f config

[Alistair Francis <alistair.francis@xilinx.com>]

On Mon, Jan 9, 2017 at 8:05 AM, Peter Maydell <peter.maydell@linaro.org> wrote:
> Add fields to the ARMCPU structure to allow CPU classes to
> specify the configurable aspects of their GIC CPU interface.
> In particular, the virtualization support allows different
> values for number of list registers, priority bits and
> preemption bits.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Acked-by: Alistair Francis <alistair.francis@xilinx.com>

Thanks,

Alistair

> ---
>  target/arm/cpu.h   | 5 +++++
>  target/arm/cpu64.c | 6 ++++++
>  2 files changed, 11 insertions(+)
>
> diff --git a/target/arm/cpu.h b/target/arm/cpu.h
> index 764b511..28c5d8f 100644
> --- a/target/arm/cpu.h
> +++ b/target/arm/cpu.h
> @@ -659,6 +659,11 @@ struct ARMCPU {
>      uint32_t dcz_blocksize;
>      uint64_t rvbar;
>
> +    /* Configurable aspects of GIC cpu interface (which is part of the CPU) */
> +    int gic_num_lrs; /* number of list registers */
> +    int gic_vpribits; /* number of virtual priority bits */
> +    int gic_vprebits; /* number of virtual preemption bits */
> +
>      ARMELChangeHook *el_change_hook;
>      void *el_change_hook_opaque;
>  };
> diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
> index 549cb1e..73c7f31 100644
> --- a/target/arm/cpu64.c
> +++ b/target/arm/cpu64.c
> @@ -147,6 +147,9 @@ static void aarch64_a57_initfn(Object *obj)
>      cpu->ccsidr[1] = 0x201fe012; /* 48KB L1 icache */
>      cpu->ccsidr[2] = 0x70ffe07a; /* 2048KB L2 cache */
>      cpu->dcz_blocksize = 4; /* 64 bytes */
> +    cpu->gic_num_lrs = 4;
> +    cpu->gic_vpribits = 5;
> +    cpu->gic_vprebits = 5;
>      define_arm_cp_regs(cpu, cortex_a57_a53_cp_reginfo);
>  }
>
> @@ -201,6 +204,9 @@ static void aarch64_a53_initfn(Object *obj)
>      cpu->ccsidr[1] = 0x201fe00a; /* 32KB L1 icache */
>      cpu->ccsidr[2] = 0x707fe07a; /* 1024KB L2 cache */
>      cpu->dcz_blocksize = 4; /* 64 bytes */
> +    cpu->gic_num_lrs = 4;
> +    cpu->gic_vpribits = 5;
> +    cpu->gic_vprebits = 5;
>      define_arm_cp_regs(cpu, cortex_a57_a53_cp_reginfo);
>  }
>
> --
> 2.7.4
>
>