linux-kernel - Re: [PATCH v2] sparc64: Add support for Application Data Integrity (ADI)

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Date:	Mon, 7 Mar 2016 09:32:08 -0800
From:	Dave Hansen <dave.hansen@...el.com>
To:	Khalid Aziz <khalid.aziz@...cle.com>, davem@...emloft.net,
	corbet@....net, akpm@...ux-foundation.org,
	dingel@...ux.vnet.ibm.com, zhenzhang.zhang@...wei.com,
	bob.picco@...cle.com, kirill.shutemov@...ux.intel.com,
	aneesh.kumar@...ux.vnet.ibm.com, aarcange@...hat.com,
	arnd@...db.de, sparclinux@...r.kernel.org
Cc:	rob.gardner@...cle.com, mhocko@...e.cz, chris.hyser@...cle.com,
	richard@....at, vbabka@...e.cz, koct9i@...il.com, oleg@...hat.com,
	gthelen@...gle.com, jack@...e.cz, xiexiuqi@...wei.com,
	Vineet.Gupta1@...opsys.com, luto@...nel.org, ebiederm@...ssion.com,
	bsegall@...gle.com, geert@...ux-m68k.org, dave@...olabs.net,
	adobriyan@...il.com, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-arch@...r.kernel.org, linux-api@...r.kernel.org
Subject: Re: [PATCH v2] sparc64: Add support for Application Data Integrity
 (ADI)

On 03/02/2016 12:39 PM, Khalid Aziz wrote:
> --- a/include/uapi/asm-generic/siginfo.h
> +++ b/include/uapi/asm-generic/siginfo.h
> @@ -206,7 +206,10 @@ typedef struct siginfo {
>  #define SEGV_MAPERR	(__SI_FAULT|1)	/* address not mapped to object */
>  #define SEGV_ACCERR	(__SI_FAULT|2)	/* invalid permissions for mapped object */
>  #define SEGV_BNDERR	(__SI_FAULT|3)  /* failed address bound checks */
> -#define NSIGSEGV	3
> +#define SEGV_ACCADI	(__SI_FAULT|4)	/* ADI not enabled for mapped object */
> +#define SEGV_ADIDERR	(__SI_FAULT|5)	/* Disrupting MCD error */
> +#define SEGV_ADIPERR	(__SI_FAULT|6)	/* Precise MCD exception */
> +#define NSIGSEGV	6

FYI, this will conflict with code in -tip right now:

> http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?h=mm/pkeys&id=cd0ea35ff5511cde299a61c21a95889b4a71464e

It's not a big deal to resolve, of course.