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

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Message-Id: <20160307.140648.619723704794000620.davem@davemloft.net>
Date:	Mon, 07 Mar 2016 14:06:48 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	dave.hansen@...el.com
Cc:	khalid.aziz@...cle.com, 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, rob.gardner@...cle.com,
	mhocko@...e.cz, chris.hyser@...cle.com, richard@....at,
	vbabka@...e.cz, koct9i@...il.com, oleg@...hat.com,
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	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)

From: Dave Hansen <dave.hansen@...el.com>
Date: Mon, 7 Mar 2016 09:35:57 -0800

> On 03/02/2016 12:39 PM, Khalid Aziz wrote:
>> +long enable_sparc_adi(unsigned long addr, unsigned long len)
>> +{
>> +	unsigned long end, pagemask;
>> +	int error;
>> +	struct vm_area_struct *vma, *vma2;
>> +	struct mm_struct *mm;
>> +
>> +	if (!ADI_CAPABLE())
>> +		return -EINVAL;
> ...
> 
> This whole thing with the VMA splitting and so forth looks pretty darn
> arch-independent.  Are you sure you need that much arch-specific code
> for it, or can you share more of the generic VMA management code?

This is exactly what I have suggested to him, and he has agreed to pursue.