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instead
Only one ACPI device should be added to a PCIe root port. For the root
ports which already have device created, the generated code from this
driver needs to be merged with the existing device.
By default, this driver will create new device named DEV0.
This change allows to generate code under an existing device.
ex: (generate code under PXSX):
Scope (\_SB.PCI0.RP01.PXSX)
{
Name (_DSD, Package (0x02) // _DSD: Device-Specific Data
{
ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301")
Package (0x01)
{
Package (0x02)
{
"UntrustedDevice",
One
}
}
})
}
BUG=b:221250331
BRANCH=firmware-brya-14505.B
Signed-off-by: Cliff Huang <cliff.huang@intel.com>
Change-Id: I80634bbfc2927f26f2a55a9c244eca517c437079
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62301
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
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In order to align with established standards for establishing DMA
boundaries[1] from ACPI, the UntrustedDevice property has been renamed
to DmaProperty, which follows Microsoft's implementation. After
discussions with Microsoft, they have agreed to make the `UID` property
optional, so it is left out here, and instead it can be applied to:
1) Internal PCI devices
2) PCIe root ports
3) Downstream PCI(e) devices
[1]: https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports
BUG=b:215424986
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Id70e916532e3d3d70305fc61473da28c702fc397
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62435
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
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This new chip driver will be used for attaching ACPI properties to PCIe
endpoints. The first property it supports is "UntrustedDevice." This
property can be used by a payload to, e.g., restrict the device to its
own IOMMU domain for security purposes. The new property is added by
adding a _DSD and an integer property set to 1.
Example of the property from google/brya0:
Scope (\_SB.PCI0.RP01)
{
Device (DEV0)
{
Name (_ADR, 0x0000000000000000) // _ADR: Address
Name (_DSD, Package (0x02) // _DSD: Device-Specific Data
{
ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301") /* Device Properties for _DSD */,
Package (0x01)
{
Package (0x02)
{
"UntrustedDevice",
One
}
}
})
}
}
BUG=b:215424986
TEST=boot patch train on google/brya0, dump SSDT, see above for snippet
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I53986614dcbf4d10a6bb4010e131f5ff5a9d25cf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61627
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
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