Raven: KFD/HSA depends on AMD_IOMMU_V2 (was: [PATCH 6/6] drm/amdkfd: Enable Raven for KFD)

[Paul Menzel]

Dear Oded,


On 07/30/18 15:53, Oded Gabbay wrote:
> Do you have IOMMUv2 enabled on this chipset?

No, I did not. With `AMD_IOMMU_V2` selected, the device is found.

```
$ grep AMD_IOMMU /boot/config-4.18.0-rc3-01368-gb5aa3f4aef72 
CONFIG_AMD_IOMMU=y
CONFIG_AMD_IOMMU_V2=m
$ sudo dmesg | grep -i kfd
[sudo] password for paul: 
[   20.767499] calling  kfd_module_init+0x0/0x1000 [amdkfd] @ 365
[   20.770567] kfd kfd: Initialized module
[   20.771195] initcall kfd_module_init+0x0/0x1000 [amdkfd] returned 0 after 3598 usecs
[   20.893432] Modules linked in: amdkfd amd_iommu_v2 snd_hda_codec_realtek crct10dif_pclmul crc32_pclmul snd_hda_codec_hdmi snd_hda_codec_generic ghash_clmulni_intel snd_hda_intel amdgpu(+) i2c_piix4 r8169 k10temp snd_hda_codec snd_hda_core mii snd_hwdep snd_pcm snd_timer snd chash soundcore gpu_sched wmi video crc32c_intel xhci_pci xhci_hcd
[   20.948465] kfd kfd: Allocated 3969056 bytes on gart
[   20.948663] kfd kfd: added device 1002:15dd
```

> If not, amdkfd won't include raven support.

Hmm, then the warning is very confusing. Also, shouldn’t the build
system ensure that the dependencies are selected?


Kind regards,

Paul

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