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Date:   Mon, 11 Oct 2021 15:11:19 +0200
From:   Borislav Petkov <bp@alien8.de>
To:     Paul Menzel <pmenzel@molgen.mpg.de>
Cc:     Alex Deucher <alexdeucher@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, X86 ML <x86@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        amd-gfx@lists.freedesktop.org,
        Tom Lendacky <thomas.lendacky@amd.com>
Subject: Re: `AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y` causes AMDGPU to fail on
 Ryzen: amdgpu: SME is not compatible with RAVEN
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On Mon, Oct 11, 2021 at 03:05:33PM +0200, Paul Menzel wrote:
> I think, the IOMMU is enabled on the MSI B350M MORTAR, but otherwise, yes
> this looks fine. The help text could also be updated to mention problems
> with AMD Raven devices.

This is not only about Raven GPUs but, as Alex explained, pretty much
about every device which doesn't support a 48 bit DMA mask. I'll expand
that aspect in the changelog.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette