Re: [Qemu-devel] [RFC PATCH v2] acpi: add reset register to fadt

[Andreas Färber]

Am 30.03.2015 um 13:34 schrieb Reza Jelveh:
> Some operating systems such as FreeBSD and Mac OSX need the reset_register
> section of the FADT filled to know which port to write to for a system reset.
> 
> Signed-off-by: Reza Jelveh <address@hidden>
> ---
>  hw/i386/acpi-build.c | 9 +++++++++
>  hw/i386/acpi-defs.h  | 2 ++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index d0a5c85..d029896 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -338,6 +338,8 @@ build_facs(GArray *table_data, GArray *linker, 
> PcGuestInfo *guest_info)
>  /* Load chipset information in FADT */
>  static void fadt_setup(AcpiFadtDescriptorRev1 *fadt, AcpiPmInfo *pm)
>  {
> +    Object *lpc = ich9_lpc_find();
> +
>      fadt->model = 1;
>      fadt->reserved1 = 0;
>      fadt->sci_int = cpu_to_le16(pm->sci_int);
> @@ -361,6 +363,13 @@ static void fadt_setup(AcpiFadtDescriptorRev1 *fadt, 
> AcpiPmInfo *pm)
>                                (1 << ACPI_FADT_F_SLP_BUTTON) |
>                                (1 << ACPI_FADT_F_RTC_S4));
>      fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_USE_PLATFORM_CLOCK);
> +    if (lpc) {
> +      fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_RESET_REG_SUP);
> +      fadt->reset_val = 0xA;
> +      fadt->reset_reg.address_space_id   = aml_system_io;
> +      fadt->reset_reg.register_bit_width = 8;
> +      fadt->reset_reg.address            = ICH9_RST_CNT_IOPORT;

Indentation is 4 spaces.

Regards,
Andreas

> +    }
>      /* APIC destination mode ("Flat Logical") has an upper limit of 8 CPUs
>       * For more than 8 CPUs, "Clustered Logical" mode has to be used
>       */
> diff --git a/hw/i386/acpi-defs.h b/hw/i386/acpi-defs.h
> index c4468f8..960c833 100644
> --- a/hw/i386/acpi-defs.h
> +++ b/hw/i386/acpi-defs.h
> @@ -132,6 +132,8 @@ struct AcpiFadtDescriptorRev1
>      uint8_t  reserved4a;             /* Reserved */
>      uint8_t  reserved4b;             /* Reserved */
>      uint32_t flags;
> +    Acpi20GenericAddress reset_reg;
> +    uint8_t reset_val;
>  } QEMU_PACKED;
>  typedef struct AcpiFadtDescriptorRev1 AcpiFadtDescriptorRev1;
>  

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