AskDavis/Getting-Started-With-ACPI
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Merge pull request #25 from holymonson/patch-1

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Add linux example to spoof.md
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Mykola Grymalyuk
2020-08-02 08:52:02 -06:00
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parent b1bc81849a 50a7ace6f5
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@@ -19,6 +19,8 @@ So to spoof the GPU, we need to find a couple things:
## Finding a suitable PCI ID ## Finding a suitable PCI ID
### Web
To find a suitable PCI ID, we'll be using [PCI ID Repository](https://pci-ids.ucw.cz/read/PC/1002) which has a full database of all AMD GPUs. For this example, we'll be creating a Spoof SSDT for the R9 390. For a full list of supported GPUs, please see the [GPU Buyers Guide](https://dortania.github.io/GPU-Buyers-Guide/). The closest match to this GPU would be the 390X, and looking on that site near the top gives us this: To find a suitable PCI ID, we'll be using [PCI ID Repository](https://pci-ids.ucw.cz/read/PC/1002) which has a full database of all AMD GPUs. For this example, we'll be creating a Spoof SSDT for the R9 390. For a full list of supported GPUs, please see the [GPU Buyers Guide](https://dortania.github.io/GPU-Buyers-Guide/). The closest match to this GPU would be the 390X, and looking on that site near the top gives us this:
``` ```
@@ -44,8 +46,30 @@ As you can see, the bytes are swapped in pairs. Keep this in mind when we make o
The specifics are due to [Endianness](https://en.wikipedia.org/wiki/Endianness) for those who are curious The specifics are due to [Endianness](https://en.wikipedia.org/wiki/Endianness) for those who are curious
### Linux
If you can run Linux, use command `lspci -vmmnnD -d 1002::0300`
```
$ lspci -vmmnnD -d 1002::0300
Slot: 0000:01:00.0
Class: VGA compatible controller [0300]
Vendor: Advanced Micro Devices, Inc. [AMD/ATI] [1002]
Device: Oland [Radeon HD 8570 / R7 240/340 / Radeon 520 OEM] [6611]
SVendor: Micro-Star International Co., Ltd. [MSI] [1462]
SDevice: Device [3740]
Rev: 87
```
You can easily get
- Slot ID `0000:01:00.0`, we need it later
- Vendor ID `1002`, all AMD devices have this ID
- Device ID `6611`, this is what we care about
- Device name `Radeon HD 8570 / R7 240/340 / Radeon 520 OEM`, mainly cosmetic
## Finding the ACPI Path of the GPU ## Finding the ACPI Path of the GPU
### Windows
To find the PCI path of a GPU is fairly simple, best way to find it is running Windows: To find the PCI path of a GPU is fairly simple, best way to find it is running Windows:
* Open Device Manager * Open Device Manager
@@ -66,7 +90,16 @@ ACPI(_SB_)#ACPI(PC02)#ACPI(BR2A)#ACPI(PEGP)#PCI(0000)#PCI(0000)
Now converting this to an ACPI path is quite simple, remove the `#ACPI` and `#PCI(0000)`: Now converting this to an ACPI path is quite simple, remove the `#ACPI` and `#PCI(0000)`:
``` ```
`_SB_.PC02.BR2A.PEGP \_SB_.PC02.BR2A.PEGP
```
### Linux
Substitute your SLOTID found above into command `cat /sys/bus/pci/devices/SLOTID/firmware_node/path`, you cat get
```
$ cat /sys/bus/pci/devices/0000:01:00.0/firmware_node/path
\_SB_.PCI0.PEG0.PEGP
``` ```
And voila! We've found our ACPI path, now that we have everything we're ready to get cooking And voila! We've found our ACPI path, now that we have everything we're ready to get cooking