linux-kernel - Re: [PATCH 12/19] ACPICA: ACPI 6.0: Add changes for MADT table.

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Date:	Thu, 21 May 2015 22:36:25 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Lv Zheng <lv.zheng@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>
CC:	Lv Zheng <zetalog@...il.com>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, Bob Moore <robert.moore@...el.com>
Subject: Re: [PATCH 12/19] ACPICA: ACPI 6.0: Add changes for MADT table.

Hi Lv,

On 2015年05月21日 10:31, Lv Zheng wrote:
> From: Bob Moore <robert.moore@...el.com>
>
> ACPICA commit 02cbb41232bccf7a91967140cab95d5f48291f21
>
> New subtable type. Some additions to existing subtables.
>
> Link: https://github.com/acpica/acpica/commit/02cbb412
> Signed-off-by: Bob Moore <robert.moore@...el.com>
> Signed-off-by: Lv Zheng <lv.zheng@...el.com>
> ---
[...]
>
>   /* Masks for Flags field above */
> @@ -819,7 +822,7 @@ struct acpi_madt_generic_interrupt {
>   #define ACPI_MADT_PERFORMANCE_IRQ_MODE  (1<<1)	/* 01: Performance Interrupt Mode */
>   #define ACPI_MADT_VGIC_IRQ_MODE         (1<<2)	/* 02: VGIC Maintenance Interrupt mode */
>
> -/* 12: Generic Distributor (ACPI 5.0) */
> +/* 12: Generic Distributor (ACPI 5.0 + ACPI 6.0 changes) */
>
>   struct acpi_madt_generic_distributor {
>   	struct acpi_subtable_header header;
> @@ -827,7 +830,8 @@ struct acpi_madt_generic_distributor {
>   	u32 gic_id;
>   	u64 base_address;
>   	u32 global_irq_base;
> -	u32 reserved2;		/* reserved - must be zero */
> +	u8 version;

version filed in generic distributor has following values,

/* Values for gic_version in Generic Distributor  (ACPI 6.0) */

enum acpi_madt_gic_ver_type
{
         ACPI_MADT_GIC_VER_UNKNOWN       = 0,
         ACPI_MADT_GIC_VER_V1            = 1,
         ACPI_MADT_GIC_VER_V2            = 2,
         ACPI_MADT_GIC_VER_V3            = 3,
         ACPI_MADT_GIC_VER_V4            = 4,
         ACPI_MADT_GIC_VER_RESERVED      = 5     /* 5 and greater are 
reserved */
};

should we put it here, or locate it to ARM64 arch related head
file?

Thanks
Hanjun
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