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| author | Heyi Guo | 2020-02-04 02:43:21 +0100 |
|---|---|---|
| committer | Peter Maydell | 2020-02-13 15:14:53 +0100 |
| commit | 93e41700012525ca198d10c586e024b925779e6d (patch) | |
| tree | bb218faa3600083d8795366b01160818526fda3c /hw/arm/virt-acpi-build.c | |
| parent | arm/virt/acpi: remove meaningless sub device "RP0" from PCI0 (diff) | |
| download | qemu-93e41700012525ca198d10c586e024b925779e6d.tar.gz qemu-93e41700012525ca198d10c586e024b925779e6d.tar.xz qemu-93e41700012525ca198d10c586e024b925779e6d.zip | |
arm/virt/acpi: remove _ADR from devices identified by _HID
According to ACPI spec, _ADR should be used for device on a bus that
has a standard enumeration algorithm, but not for device which is on
system bus and must be enumerated by OSPM. And it is not recommended
to contain both _HID and _ADR in a single device.
See ACPI 6.3, section 6.1, top of page 343:
A device object must contain either an _HID object or an _ADR object,
but should not contain both.
(https://uefi.org/sites/default/files/resources/ACPI_6_3_May16.pdf)
Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200204014325.16279-4-guoheyi@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/arm/virt-acpi-build.c')
| -rw-r--r-- | hw/arm/virt-acpi-build.c | 8 |
1 files changed, 0 insertions, 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); } |