From: Thomas Gleixner <tglx@linutronix.de> To: Dave Hansen <dave@sr71.net> Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, dave.hansen@linux.intel.com Subject: Re: [PATCH 23/34] x86, pkeys: add Kconfig prompt to existing config option Date: Tue, 8 Dec 2015 19:21:05 +0100 (CET) [thread overview] Message-ID: <alpine.DEB.2.11.1512081920250.3595@nanos> (raw) In-Reply-To: <20151204011456.A052855B@viggo.jf.intel.com> On Thu, 3 Dec 2015, Dave Hansen wrote: > I don't have a strong opinion on whether we need this or not. > Protection Keys has relatively little code associated with it, > and it is not a heavyweight feature to keep enabled. However, > I can imagine that folks would still appreciate being able to > disable it. The tiny kernel folks are happy about every few kB which are NOT added by default. > > Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> > --- > > b/arch/x86/Kconfig | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff -puN arch/x86/Kconfig~pkeys-40-kconfig-prompt arch/x86/Kconfig > --- a/arch/x86/Kconfig~pkeys-40-kconfig-prompt 2015-12-03 16:21:28.726811905 -0800 > +++ b/arch/x86/Kconfig 2015-12-03 16:21:28.730812086 -0800 > @@ -1682,8 +1682,18 @@ config X86_INTEL_MPX > If unsure, say N. > > config X86_INTEL_MEMORY_PROTECTION_KEYS > + prompt "Intel Memory Protection Keys" > def_bool y > + # Note: only available in 64-bit mode > depends on CPU_SUP_INTEL && X86_64 > + ---help--- > + Memory Protection Keys provides a mechanism for enforcing > + page-based protections, but without requiring modification of the > + page tables when an application changes protection domains. > + > + For details, see Documentation/x86/protection-keys.txt > + > + If unsure, say y. > > config EFI > bool "EFI runtime service support" > _ >
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de> To: Dave Hansen <dave@sr71.net> Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, dave.hansen@linux.intel.com Subject: Re: [PATCH 23/34] x86, pkeys: add Kconfig prompt to existing config option Date: Tue, 8 Dec 2015 19:21:05 +0100 (CET) [thread overview] Message-ID: <alpine.DEB.2.11.1512081920250.3595@nanos> (raw) In-Reply-To: <20151204011456.A052855B@viggo.jf.intel.com> On Thu, 3 Dec 2015, Dave Hansen wrote: > I don't have a strong opinion on whether we need this or not. > Protection Keys has relatively little code associated with it, > and it is not a heavyweight feature to keep enabled. However, > I can imagine that folks would still appreciate being able to > disable it. The tiny kernel folks are happy about every few kB which are NOT added by default. > > Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> > --- > > b/arch/x86/Kconfig | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff -puN arch/x86/Kconfig~pkeys-40-kconfig-prompt arch/x86/Kconfig > --- a/arch/x86/Kconfig~pkeys-40-kconfig-prompt 2015-12-03 16:21:28.726811905 -0800 > +++ b/arch/x86/Kconfig 2015-12-03 16:21:28.730812086 -0800 > @@ -1682,8 +1682,18 @@ config X86_INTEL_MPX > If unsure, say N. > > config X86_INTEL_MEMORY_PROTECTION_KEYS > + prompt "Intel Memory Protection Keys" > def_bool y > + # Note: only available in 64-bit mode > depends on CPU_SUP_INTEL && X86_64 > + ---help--- > + Memory Protection Keys provides a mechanism for enforcing > + page-based protections, but without requiring modification of the > + page tables when an application changes protection domains. > + > + For details, see Documentation/x86/protection-keys.txt > + > + If unsure, say y. > > config EFI > bool "EFI runtime service support" > _ > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-12-08 18:21 UTC|newest] Thread overview: 145+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-12-04 1:14 [PATCH 00/34] x86: Memory Protection Keys (v5) Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 01/34] mm, gup: introduce concept of "foreign" get_user_pages() Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 02/34] x86, fpu: add placeholder for Processor Trace XSAVE state Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 03/34] x86, pkeys: Add Kconfig option Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 04/34] x86, pkeys: cpuid bit definition Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 05/34] x86, pkeys: define new CR4 bit Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 06/34] x86, pkeys: add PKRU xsave fields and data structure(s) Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 07/34] x86, pkeys: PTE bits for storing protection key Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 08/34] x86, pkeys: new page fault error code bit: PF_PK Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 09/34] x86, pkeys: store protection in high VMA flags Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 14:17 ` Thomas Gleixner 2015-12-08 14:17 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 10/34] x86, pkeys: arch-specific protection bits Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 15:15 ` [PATCH 10/34] x86, pkeys: arch-specific protection bitsy Thomas Gleixner 2015-12-08 15:15 ` Thomas Gleixner 2015-12-08 16:34 ` Dave Hansen 2015-12-08 16:34 ` Dave Hansen 2015-12-08 17:24 ` Thomas Gleixner 2015-12-08 17:24 ` Thomas Gleixner 2015-12-08 18:06 ` Dave Hansen 2015-12-08 18:29 ` Thomas Gleixner 2015-12-08 18:29 ` Thomas Gleixner 2015-12-08 18:35 ` Thomas Gleixner 2015-12-08 18:35 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 11/34] x86, pkeys: pass VMA down in to fault signal generation code Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 12/34] signals, pkeys: notify userspace about protection key faults Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 13/34] x86, pkeys: fill in pkey field in siginfo Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 14/34] x86, pkeys: add functions to fetch PKRU Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 15:18 ` Thomas Gleixner 2015-12-08 15:18 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 15/34] mm: factor out VMA fault permission checking Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 17:26 ` Thomas Gleixner 2015-12-08 17:26 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 16/34] x86, mm: simplify get_user_pages() PTE bit handling Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:01 ` Thomas Gleixner 2015-12-08 18:01 ` Thomas Gleixner 2015-12-08 18:30 ` Dave Hansen 2015-12-08 18:30 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 17/34] x86, pkeys: check VMAs and PTEs for protection keys Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:11 ` Thomas Gleixner 2015-12-08 18:11 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 18/34] mm: add gup flag to indicate "foreign" mm access Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 19/34] x86, pkeys: optimize fault handling in access_error() Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:14 ` Thomas Gleixner 2015-12-08 18:14 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 20/34] x86, pkeys: differentiate instruction fetches Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:17 ` Thomas Gleixner 2015-12-08 18:17 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 21/34] x86, pkeys: dump PKRU with other kernel registers Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:19 ` Thomas Gleixner 2015-12-08 18:19 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 22/34] x86, pkeys: dump PTE pkey in /proc/pid/smaps Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:20 ` Thomas Gleixner 2015-12-08 18:20 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 23/34] x86, pkeys: add Kconfig prompt to existing config option Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:21 ` Thomas Gleixner [this message] 2015-12-08 18:21 ` Thomas Gleixner 2015-12-04 1:14 ` [PATCH 24/34] mm, multi-arch: pass a protection key in to calc_vm_flag_bits() Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-04 1:14 ` [PATCH 25/34] x86, pkeys: add arch_validate_pkey() Dave Hansen 2015-12-04 1:14 ` Dave Hansen 2015-12-08 18:39 ` Thomas Gleixner 2015-12-08 18:39 ` Thomas Gleixner 2015-12-04 1:15 ` [PATCH 26/34] mm: implement new mprotect_key() system call Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-05 6:50 ` Michael Kerrisk (man-pages) 2015-12-05 6:50 ` Michael Kerrisk (man-pages) 2015-12-05 6:50 ` Michael Kerrisk (man-pages) 2015-12-07 16:44 ` Dave Hansen 2015-12-07 16:44 ` Dave Hansen 2015-12-09 11:08 ` Michael Kerrisk (man-pages) 2015-12-09 11:08 ` Michael Kerrisk (man-pages) 2015-12-09 15:48 ` Dave Hansen 2015-12-09 15:48 ` Dave Hansen 2015-12-09 16:45 ` Michael Kerrisk (man-pages) 2015-12-09 16:45 ` Michael Kerrisk (man-pages) 2015-12-09 16:45 ` Michael Kerrisk (man-pages) 2015-12-09 17:05 ` Dave Hansen 2015-12-09 17:05 ` Dave Hansen 2015-12-09 17:05 ` Dave Hansen 2015-12-11 20:13 ` Michael Kerrisk (man-pages) 2015-12-11 20:13 ` Michael Kerrisk (man-pages) 2015-12-04 1:15 ` [PATCH 27/34] x86, pkeys: make mprotect_key() mask off additional vm_flags Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-08 18:41 ` Thomas Gleixner 2015-12-08 18:41 ` Thomas Gleixner 2015-12-04 1:15 ` [PATCH 28/34] x86: wire up mprotect_key() system call Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-08 18:44 ` Thomas Gleixner 2015-12-08 18:44 ` Thomas Gleixner 2015-12-08 18:44 ` Thomas Gleixner 2015-12-08 19:06 ` Dave Hansen 2015-12-08 19:06 ` Dave Hansen 2015-12-08 20:38 ` Thomas Gleixner 2015-12-08 20:38 ` Thomas Gleixner 2015-12-08 20:38 ` Thomas Gleixner 2015-12-04 1:15 ` [PATCH 29/34] x86: separate out LDT init from context init Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-08 18:45 ` Thomas Gleixner 2015-12-08 18:45 ` Thomas Gleixner 2015-12-04 1:15 ` [PATCH 30/34] x86, fpu: allow setting of XSAVE state Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-08 18:48 ` Thomas Gleixner 2015-12-08 18:48 ` Thomas Gleixner 2015-12-04 1:15 ` [PATCH 31/34] x86, pkeys: allocation/free syscalls Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-04 1:15 ` [PATCH 32/34] x86, pkeys: add pkey set/get syscalls Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-04 1:15 ` [PATCH 33/34] x86, pkeys: actually enable Memory Protection Keys in CPU Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-04 1:15 ` [PATCH 34/34] x86, pkeys: Documentation Dave Hansen 2015-12-04 1:15 ` Dave Hansen 2015-12-04 23:31 ` [PATCH 00/34] x86: Memory Protection Keys (v5) Andy Lutomirski 2015-12-04 23:31 ` Andy Lutomirski 2015-12-04 23:38 ` Dave Hansen 2015-12-04 23:38 ` Dave Hansen 2015-12-04 23:38 ` Dave Hansen 2015-12-11 20:16 ` Andy Lutomirski 2015-12-11 20:16 ` Andy Lutomirski 2015-12-11 20:16 ` Andy Lutomirski
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=alpine.DEB.2.11.1512081920250.3595@nanos \ --to=tglx@linutronix.de \ --cc=dave.hansen@linux.intel.com \ --cc=dave@sr71.net \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mm@kvack.org \ --cc=x86@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.