Re: [PATCH v2 01/12] x86/ioremap: Selectively build arch override encryption functions

[Borislav Petkov]

On Fri, Aug 13, 2021 at 11:59:20AM -0500, Tom Lendacky wrote:
> In prep for other uses of the prot_guest_has() function besides AMD's
> memory encryption support, selectively build the AMD memory encryption
> architecture override functions only when CONFIG_AMD_MEM_ENCRYPT=y. These
> functions are:
> - early_memremap_pgprot_adjust()
> - arch_memremap_can_ram_remap()
> 
> Additionally, routines that are only invoked by these architecture
> override functions can also be conditionally built. These functions are:
> - memremap_should_map_decrypted()
> - memremap_is_efi_data()
> - memremap_is_setup_data()
> - early_memremap_is_setup_data()
> 
> And finally, phys_mem_access_encrypted() is conditionally built as well,
> but requires a static inline version of it when CONFIG_AMD_MEM_ENCRYPT is
> not set.
> 
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> Cc: Andy Lutomirski <luto@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
> ---
>  arch/x86/include/asm/io.h | 8 ++++++++
>  arch/x86/mm/ioremap.c     | 2 +-
>  2 files changed, 9 insertions(+), 1 deletion(-)

LGTM.

-- 
Regards/Gruss,
    Boris.

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