linux-kernel - Re: [tip:x86/asm] x86/mm/xen: Suppress hugetlbfs in PV guests

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 22 Apr 2016 11:03:53 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	mingo@...nel.org, dvlasenk@...hat.com, vkuznets@...hat.com,
	tglx@...utronix.de, linux-kernel@...r.kernel.org,
	toshi.kani@...com, xen-devel@...ts.xenproject.org,
	luto@...capital.net, mcgrof@...e.com, boris.ostrovsky@...cle.com,
	jbeulich@...e.com, david.vrabel@...rix.com, bp@...en8.de,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	brgerst@...il.com, peterz@...radead.org, JGross@...e.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/asm] x86/mm/xen: Suppress hugetlbfs in PV guests

On 04/22/2016 02:47 AM, tip-bot for Jan Beulich wrote:
> Commit-ID:  103f6112f253017d7062cd74d17f4a514ed4485c
> Gitweb:     http://git.kernel.org/tip/103f6112f253017d7062cd74d17f4a514ed4485c
> Author:     Jan Beulich <JBeulich@...e.com>
> AuthorDate: Thu, 21 Apr 2016 00:27:04 -0600
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Fri, 22 Apr 2016 10:05:00 +0200
> 
> 
> diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
> index f8a29d2..e6a8613 100644
> --- a/arch/x86/include/asm/hugetlb.h
> +++ b/arch/x86/include/asm/hugetlb.h
> @@ -4,6 +4,7 @@
>  #include <asm/page.h>
>  #include <asm-generic/hugetlb.h>
>  
> +#define hugepages_supported() cpu_has_pse
>  

Please don't use the cpu_has_* macros anymore, they are going away soon.

In this case it should be static_cpu_has(X86_FEATURE_PSE).

	-hpa