linux-kernel - Re: [PATCH v2 3/4] EFI: Introduce the new AMD Memory Encryption GUID.

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Message-ID: <YJvV9yKclJWLppWU@zn.tnic>
Date:   Wed, 12 May 2021 15:19:51 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Ashish Kalra <Ashish.Kalra@....com>
Cc:     pbonzini@...hat.com, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, joro@...tes.org, thomas.lendacky@....com,
        x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        srutherford@...gle.com, seanjc@...gle.com,
        venu.busireddy@...cle.com, brijesh.singh@....com,
        linux-efi@...r.kernel.org
Subject: Re: [PATCH v2 3/4] EFI: Introduce the new AMD Memory Encryption GUID.

On Fri, Apr 23, 2021 at 03:59:01PM +0000, Ashish Kalra wrote:
> From: Ashish Kalra <ashish.kalra@....com>
> 
> Introduce a new AMD Memory Encryption GUID which is currently
> used for defining a new UEFI environment variable which indicates
> UEFI/OVMF support for the SEV live migration feature. This variable
> is setup when UEFI/OVMF detects host/hypervisor support for SEV
> live migration and later this variable is read by the kernel using
> EFI runtime services to verify if OVMF supports the live migration
> feature.
> 
> Signed-off-by: Ashish Kalra <ashish.kalra@....com>
> ---
>  include/linux/efi.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index 8710f5710c1d..e95c144d1d02 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -360,6 +360,7 @@ void efi_native_runtime_setup(void);
>  
>  /* OEM GUIDs */
>  #define DELLEMC_EFI_RCI2_TABLE_GUID		EFI_GUID(0x2d9f28a2, 0xa886, 0x456a,  0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)
> +#define MEM_ENCRYPT_GUID			EFI_GUID(0x0cf29b71, 0x9e51, 0x433a,  0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)
>  
>  typedef struct {
>  	efi_guid_t guid;
> -- 

When you apply this patch locally, you do:

$ git log -p -1 | ./scripts/get_maintainer.pl
Ard Biesheuvel <ardb@...nel.org> (maintainer:EXTENSIBLE FIRMWARE INTERFACE (EFI))
linux-efi@...r.kernel.org (open list:EXTENSIBLE FIRMWARE INTERFACE (EFI))
linux-kernel@...r.kernel.org (open list)

and this tells you that you need to CC EFI folks too.

I've CCed linux-efi now - please make sure you use that script to CC the
relevant parties on patches, in the future.

Thx.

-- 
Regards/Gruss,
    Boris.

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