Re: [Qemu-devel] [PATCH 2/3] target-i386: reserve RCRB mmio space in ACPI DSDT table

[Paolo Bonzini <pbonzini@redhat.com>]

On 27/05/2015 02:29, Paulo Alcantara wrote:
> Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
> ---
>  hw/i386/acpi-dsdt-pdrc.dsl    |  46 ++++++++++++++++++++++++++++++++++++++++++

Why pdrc and not e.g. ccr (chipset configuration registers)?  I cannot
find PDRC / PCI device resource consumption in the ICH9 spec.

>  hw/i386/q35-acpi-dsdt.dsl     |   1 +
>  tests/acpi-test-data/q35/DSDT | Bin 7666 -> 7795 bytes
>  3 files changed, 47 insertions(+)
>  create mode 100644 hw/i386/acpi-dsdt-pdrc.dsl
> 
> diff --git a/hw/i386/acpi-dsdt-pdrc.dsl b/hw/i386/acpi-dsdt-pdrc.dsl
> new file mode 100644
> index 0000000..badb410
> --- /dev/null
> +++ b/hw/i386/acpi-dsdt-pdrc.dsl
> @@ -0,0 +1,46 @@
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> +
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> +
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +/****************************************************************
> + * PCI Device Resource Comsumption

"Chipset configuration registers"

> + ****************************************************************/
> +
> +Scope(\_SB.PCI0) {
> +    Device (PDRC) {

Device (CCR)

> +        Name (_HID, EISAID("PNP0C02"))
> +        Name (_UID, 1)
> +
> +        Name (PDRS, ResourceTemplate() {

Just use Name(_CRS, ResourceTemplate() { ... })

> +	    Memory32Fixed(ReadWrite, 0xfed1c000, 0x00004000)
> +        })
> +
> +        Method (_CRS, 0, Serialized) {
> +            Return(PDRS)
> +        }
> +    }
> +}
> +
> +Scope(\_SB) {
> +    OperationRegion (RCRB, SystemMemory, 0xfed1c000, 0x4000)
> +    Field (RCRB, DWordAcc, Lock, Preserve) {
> +        Offset(0x3000),
> +	TCTL, 8,
> +	, 24,
> +	Offset(0x3400),
> +	RTCC, 32,
> +	HPTC, 32,
> +	GCSR, 32,
> +    }

Why do you need the RCRB OperationRegion if you never access it?

> +}
> diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
> index 16eaca3..32b680e 100644
> --- a/hw/i386/q35-acpi-dsdt.dsl
> +++ b/hw/i386/q35-acpi-dsdt.dsl
> @@ -114,6 +114,7 @@ DefinitionBlock (
>          }
>      }
>  
> +#include "acpi-dsdt-pdrc.dsl"

Just include it in this file since it's not shared between i440FX and Q35.

Thanks,

Paolo

>  #include "acpi-dsdt-hpet.dsl"
>  
>  
> diff --git a/tests/acpi-test-data/q35/DSDT b/tests/acpi-test-data/q35/DSDT
> index 4723e5954dccb00995ccaf521b7daf6bf15cf1d4..beea54c234954c54c3b008b52e3cd167701253c7 100644
> GIT binary patch
> delta 154
> zcmexl{n>`gCD<jTSdM{#annYwc*c5H7QOgjr}zM8PlM<tivX7(XO4IePZu7?3p`95
> z@u8kBj2uA0U_n7HzBWz<Mur0y|1mf)FjO*#aK}3b1#>I`$qHD3%!qCXat?B0-~p-O
> xW^jmZQ~~jY85$TQLYzZ<I2a@t8vZc`g*ZDacm#wvE4Vuc2Qeya&S3140RYvzDYXCq
> 
> delta 24
> gcmext^U0daCD<k8lPm)R<DrdQ@r;{aF?PxT0CYGA#sB~S
>