[edk2-devel] [PATCH] OvmfPkg: Fix SevMemoryAcceptance memory attributes
Dionna Glaze via groups.io
dionnaglaze=google.com at groups.io
Tue Jan 31 19:18:12 UTC 2023
>
> efi: mem94: [Conventional| | |CC| | | | | | | | | | | ]
> range=[0x0000000100000000-0x000000023fffffff] (5120MB)
>
> This does not have the cache capabilities one would expect for system
> memory, UC|WC|WT|WB.
>
> After this change, the same entry becomes
>
> efi: mem94: [Conventional| | |CC| | | | | | | |WB|WT|WC|UC]
> range=[0x0000000100000000-0x000000023fffffff] (5120MB)
>
> This has all the expected attributes.
>
This change is made given a request from Ard. The CC capability is not
applied to other system memory ranges that probably should also have
that capability, given that it's encrypted and accepted. I haven't
considered carefully where EFI_MEMORY_CPU_CRYPTO should be added to
conventional memory, given the acceptance happens before DXE
initializes. Perhaps
CoreConvertResourceDescriptorHobAttributesToCapabilities? This is more
of a question to Ard and Thomas.
--
-Dionna Glaze, PhD (she/her)
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