Re: [PATCH 2/2] arm/virt/acpi: remove _ADR from devices identified by _HID

[Igor Mammedov <imammedo@redhat.com>]

On Thu, 19 Dec 2019 14:47:59 +0800
Heyi Guo <guoheyi@huawei.com> wrote:

> According to ACPI spec, _ADR should be used for device which is on a
> bus that has a standard enumeration algorithm. It does not make sense
> to have a _ADR object for devices which already have _HID and will be
> enumerated by OSPM.
> 
> Signed-off-by: Heyi Guo <guoheyi@huawei.com>

Are you sure it's does not make sense?
Have you checked commit f264d51d8, that added _ADR?

> ---
> Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Igor Mammedov <imammedo@redhat.com>
> Cc: qemu-arm@nongnu.org
> Cc: qemu-devel@nongnu.org
> ---
>  hw/arm/virt-acpi-build.c          |   8 --------
>  tests/data/acpi/virt/DSDT         | Bin 18449 -> 18426 bytes
>  tests/data/acpi/virt/DSDT.memhp   | Bin 19786 -> 19763 bytes
>  tests/data/acpi/virt/DSDT.numamem | Bin 18449 -> 18426 bytes
>  4 files changed, 8 deletions(-)
> 
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 9f4c7d1889..be752c0ad8 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -78,11 +78,6 @@ static void acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
>                               AML_EXCLUSIVE, &uart_irq, 1));
>      aml_append(dev, aml_name_decl("_CRS", crs));
>  
> -    /* The _ADR entry is used to link this device to the UART described
> -     * in the SPCR table, i.e. SPCR.base_address.address == _ADR.
> -     */
> -    aml_append(dev, aml_name_decl("_ADR", aml_int(uart_memmap->base)));
> -
>      aml_append(scope, dev);
>  }
>  
> @@ -170,7 +165,6 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
>      aml_append(dev, aml_name_decl("_CID", aml_string("PNP0A03")));
>      aml_append(dev, aml_name_decl("_SEG", aml_int(0)));
>      aml_append(dev, aml_name_decl("_BBN", aml_int(0)));
> -    aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
>      aml_append(dev, aml_name_decl("_UID", aml_string("PCI0")));
>      aml_append(dev, aml_name_decl("_STR", aml_unicode("PCIe 0 Device")));
>      aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
> @@ -334,7 +328,6 @@ static void acpi_dsdt_add_gpio(Aml *scope, const MemMapEntry *gpio_memmap,
>  {
>      Aml *dev = aml_device("GPO0");
>      aml_append(dev, aml_name_decl("_HID", aml_string("ARMH0061")));
> -    aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
>      aml_append(dev, aml_name_decl("_UID", aml_int(0)));
>  
>      Aml *crs = aml_resource_template();
> @@ -364,7 +357,6 @@ static void acpi_dsdt_add_power_button(Aml *scope)
>  {
>      Aml *dev = aml_device(ACPI_POWER_BUTTON_DEVICE);
>      aml_append(dev, aml_name_decl("_HID", aml_string("PNP0C0C")));
> -    aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
>      aml_append(dev, aml_name_decl("_UID", aml_int(0)));
>      aml_append(scope, dev);
>  }
> diff --git a/tests/data/acpi/virt/DSDT b/tests/data/acpi/virt/DSDT
> index b5895cb22446860a0b9be3d32ec856feb388be4c..a759ff739a071d5fbf50519a6aea296e5e0f1e0c 100644
> GIT binary patch
> delta 72
> zcmbO@f$>*ABbQ6COUN&G1_q{66S<_BT5Bh&t1wzk^tIeLL4lL8ZSqD=gU!!5x$Pt+
> c1HyxxIO07#U3dfh0t}oDoEbRcLp@y>07w882mk;8  
> 
> delta 94
> zcmey>&p2@cBbQ6CONgKc0|V26iCof5J#`b+RhV2^Ci+-%al|{i1o1F1FmP^cRp4ao  
> tnY@hCfEg&X`7$S;oxFTNc#soEyoaX?Z-8HbfwO@#16Tu)4E1zj005fm7mWY_
> 
> diff --git a/tests/data/acpi/virt/DSDT.memhp b/tests/data/acpi/virt/DSDT.memhp
> index 69ad844f65d047973a3e55198beecd45a35b8fce..6e5cc61977e4cd24f765fec0693f75a528c144c1 100644
> GIT binary patch
> delta 72
> zcmX>#i*fTTMlP3Nmk?uL1_q|eiCof5eHSLGt1wzk^tIeLL4lL8ZSqD=gU!!5U7RH)
> c1HyxxIO07#U3dfh0t}oDoEbRcLp@y>03)CjmjD0&  
> 
> delta 94
> zcmdlyi}BPfMlP3Nmk=*s1_q}3iCof5t(PXMt1!8;O!Tqj;)r*23F2X3VBp-?s=&$E
> tGkF=O0W(l&^JPwVXL<R6@E|9Scn?n(-T=P<17`zg2CxPo8S3f6006qZ7#siq
> 
> diff --git a/tests/data/acpi/virt/DSDT.numamem b/tests/data/acpi/virt/DSDT.numamem
> index b5895cb22446860a0b9be3d32ec856feb388be4c..a759ff739a071d5fbf50519a6aea296e5e0f1e0c 100644
> GIT binary patch
> delta 72
> zcmbO@f$>*ABbQ6COUN&G1_q{66S<_BT5Bh&t1wzk^tIeLL4lL8ZSqD=gU!!5x$Pt+
> c1HyxxIO07#U3dfh0t}oDoEbRcLp@y>07w882mk;8  
> 
> delta 94
> zcmey>&p2@cBbQ6CONgKc0|V26iCof5J#`b+RhV2^Ci+-%al|{i1o1F1FmP^cRp4ao  
> tnY@hCfEg&X`7$S;oxFTNc#soEyoaX?Z-8HbfwO@#16Tu)4E1zj005fm7mWY_
>