linux-kernel - Re: [PATCHv4 07/18] x86/mm: Introduce variables to store number, shift and mask of KeyIDs

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Message-ID: <20180709180949.GH6873@char.US.ORACLE.com>
Date:   Mon, 9 Jul 2018 14:09:49 -0400
From:   Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Dave Hansen <dave.hansen@...el.com>,
        Kai Huang <kai.huang@...ux.intel.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCHv4 07/18] x86/mm: Introduce variables to store number,
 shift and mask of KeyIDs

> diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
> index 4b101dd6e52f..4ebee899c363 100644
> --- a/arch/x86/mm/Makefile
> +++ b/arch/x86/mm/Makefile
> @@ -53,3 +53,5 @@ obj-$(CONFIG_PAGE_TABLE_ISOLATION)		+= pti.o
>  obj-$(CONFIG_AMD_MEM_ENCRYPT)	+= mem_encrypt.o
>  obj-$(CONFIG_AMD_MEM_ENCRYPT)	+= mem_encrypt_identity.o
>  obj-$(CONFIG_AMD_MEM_ENCRYPT)	+= mem_encrypt_boot.o
> +
> +obj-$(CONFIG_X86_INTEL_MKTME)	+= mktme.o

Any particular reason to have x86 in the CONFIG?

> diff --git a/arch/x86/mm/mktme.c b/arch/x86/mm/mktme.c
> new file mode 100644
> index 000000000000..467f1b26c737
> --- /dev/null
> +++ b/arch/x86/mm/mktme.c
> @@ -0,0 +1,5 @@
> +#include <asm/mktme.h>
> +
> +phys_addr_t mktme_keyid_mask;
> +int mktme_nr_keyids;
> +int mktme_keyid_shift;
> -- 
> 2.18.0
>