From: Waiman Long <longman@redhat.com> To: Khalid Aziz <khalid.aziz@oracle.com>, Ingo Molnar <mingo@kernel.org> Cc: juergh@gmail.com, tycho@tycho.ws, jsteckli@amazon.de, keescook@google.com, konrad.wilk@oracle.com, Juerg Haefliger <juerg.haefliger@canonical.com>, deepa.srinivasan@oracle.com, chris.hyser@oracle.com, tyhicks@canonical.com, dwmw@amazon.co.uk, andrew.cooper3@citrix.com, jcm@redhat.com, boris.ostrovsky@oracle.com, iommu@lists.linux-foundation.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, Khalid Aziz <khalid@gonehiking.org>, Linus Torvalds <torvalds@linux-foundation.org>, Andrew Morton <akpm@linux-foundation.org>, Thomas Gleixner <tglx@linutronix.de>, Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Dave Subject: Re: [RFC PATCH v9 03/13] mm: Add support for eXclusive Page Frame Ownership (XPFO) Date: Wed, 1 May 2019 10:49:44 -0400 [thread overview] Message-ID: <35c4635e-8214-7dde-b4ec-4cb266b2ea10@redhat.com> (raw) In-Reply-To: <e16c1d73-d361-d9c7-5b8e-c495318c2509@oracle.com> On Wed, Apr 03, 2019 at 11:34:04AM -0600, Khalid Aziz wrote: > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 858b6c0b9a15..9b36da94760e 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -2997,6 +2997,12 @@ > > nox2apic [X86-64,APIC] Do not enable x2APIC mode. > > + noxpfo [XPFO] Disable eXclusive Page Frame Ownership (XPFO) > + when CONFIG_XPFO is on. Physical pages mapped into > + user applications will also be mapped in the > + kernel's address space as if CONFIG_XPFO was not > + enabled. > + > cpu0_hotplug [X86] Turn on CPU0 hotplug feature when > CONFIG_BO OTPARAM_HOTPLUG_CPU0 is off. > Some features depend on CPU0. Known dependencies are: Given the big performance impact that XPFO can have. It should be off by default when configured. Instead, the xpfo option should be used to enable it. Cheers, Longman
WARNING: multiple messages have this Message-ID (diff)
From: Waiman Long <longman@redhat.com> To: Khalid Aziz <khalid.aziz@oracle.com>, Ingo Molnar <mingo@kernel.org> Cc: Dave Hansen <dave@sr71.net>, linux-doc@vger.kernel.org, linux-mm@kvack.org, deepa.srinivasan@oracle.com, "H. Peter Anvin" <hpa@zytor.com>, Thomas Gleixner <tglx@linutronix.de>, tycho@tycho.ws, x86@kernel.org, iommu@lists.linux-foundation.org, jsteckli@amazon.de, Arjan van de Ven <arjan@infradead.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, konrad.wilk@oracle.com, jcm@redhat.com, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>, boris.ostrovsky@oracle.com, chris.hyser@oracle.com, linux-arm-kernel@lists.infradead.org, Khalid Aziz <khalid@gonehiking.org>, juergh@gmail.com, andrew.cooper3@citrix.com, linux-kernel@vger.kernel.org, tyhicks@canonical.com, linux-security-module@vger.kernel.org, Juerg Haefliger <juerg.haefliger@canonical.com>, keescook@google.com, Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org>, dwmw@amazon.co.uk Subject: Re: [RFC PATCH v9 03/13] mm: Add support for eXclusive Page Frame Ownership (XPFO) Date: Wed, 1 May 2019 10:49:44 -0400 [thread overview] Message-ID: <35c4635e-8214-7dde-b4ec-4cb266b2ea10@redhat.com> (raw) Message-ID: <20190501144944.4O9MJFHrShYx1AEDkgLru0OoY0-7uOLhy8j-67nofrA@z> (raw) In-Reply-To: <e16c1d73-d361-d9c7-5b8e-c495318c2509@oracle.com> On Wed, Apr 03, 2019 at 11:34:04AM -0600, Khalid Aziz wrote: > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 858b6c0b9a15..9b36da94760e 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -2997,6 +2997,12 @@ > > nox2apic [X86-64,APIC] Do not enable x2APIC mode. > > + noxpfo [XPFO] Disable eXclusive Page Frame Ownership (XPFO) > + when CONFIG_XPFO is on. Physical pages mapped into > + user applications will also be mapped in the > + kernel's address space as if CONFIG_XPFO was not > + enabled. > + > cpu0_hotplug [X86] Turn on CPU0 hotplug feature when > CONFIG_BO OTPARAM_HOTPLUG_CPU0 is off. > Some features depend on CPU0. Known dependencies are: Given the big performance impact that XPFO can have. It should be off by default when configured. Instead, the xpfo option should be used to enable it. Cheers, Longman _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2019-05-01 14:49 UTC|newest] Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-03 17:34 [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 11/13] xpfo, mm: optimize spinlock usage in xpfo_kunmap Khalid Aziz [not found] ` <5bab13e12d4215112ad2180106cc6bb9b513754a.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-04 7:56 ` Peter Zijlstra 2019-04-04 16:06 ` Khalid Aziz [not found] ` <cover.1554248001.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-03 17:34 ` [RFC PATCH v9 01/13] mm: add MAP_HUGETLB support to vm_mmap Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 02/13] x86: always set IF before oopsing from page fault Khalid Aziz [not found] ` <e6c57f675e5b53d4de266412aa526b7660c47918.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-04 0:12 ` Andy Lutomirski [not found] ` <CALCETrXvwuwkVSJ+S5s7wTBkNNj3fRVxpx9BvsXWrT=3ZdRnCw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2019-04-04 1:42 ` Tycho Andersen 2019-04-04 4:12 ` Andy Lutomirski [not found] ` <CALCETrVp37Xo3EMHkeedP1zxUMf9og=mceBa8c55e1F4G1DRSQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2019-04-04 15:47 ` Tycho Andersen 2019-04-04 16:23 ` Sebastian Andrzej Siewior 2019-04-04 16:28 ` Thomas Gleixner [not found] ` <alpine.DEB.2.21.1904041822320.1802-ecDvlHI5BZPZikZi3RtOZ1XZhhPuCNm+@public.gmane.org> 2019-04-04 17:11 ` Andy Lutomirski 2019-04-03 17:34 ` [RFC PATCH v9 03/13] mm: Add support for eXclusive Page Frame Ownership (XPFO) Khalid Aziz [not found] ` <f1ac3700970365fb979533294774af0b0dd84b3b.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-04 7:21 ` Peter Zijlstra [not found] ` <20190404072152.GN4038-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org> 2019-04-04 9:25 ` Peter Zijlstra 2019-04-04 14:48 ` Tycho Andersen 2019-04-04 7:43 ` Peter Zijlstra [not found] ` <20190404074323.GO4038-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org> 2019-04-04 15:15 ` Khalid Aziz [not found] ` <b414bacc-2883-1914-38ec-3d8f4a032e10-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-04 17:01 ` Peter Zijlstra 2019-04-17 16:15 ` Ingo Molnar 2019-04-17 16:15 ` Ingo Molnar [not found] ` <20190417161042.GA43453-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2019-04-17 16:49 ` Khalid Aziz 2019-04-17 16:49 ` Khalid Aziz 2019-04-17 17:09 ` Ingo Molnar 2019-04-17 17:09 ` Ingo Molnar 2019-04-17 17:19 ` Nadav Amit 2019-04-17 17:19 ` Nadav Amit 2019-04-17 17:26 ` Ingo Molnar 2019-04-17 17:26 ` Ingo Molnar 2019-04-17 17:44 ` Nadav Amit 2019-04-17 17:44 ` Nadav Amit 2019-04-17 21:19 ` Thomas Gleixner 2019-04-17 21:19 ` Thomas Gleixner [not found] ` <alpine.DEB.2.21.1904172317460.3174-ecDvlHI5BZPZikZi3RtOZ1XZhhPuCNm+@public.gmane.org> 2019-04-17 23:18 ` Linus Torvalds 2019-04-17 23:18 ` Linus Torvalds 2019-04-17 23:42 ` Thomas Gleixner 2019-04-17 23:42 ` Thomas Gleixner 2019-04-17 23:52 ` Linus Torvalds 2019-04-17 23:52 ` Linus Torvalds 2019-04-18 4:41 ` Andy Lutomirski 2019-04-18 4:41 ` Andy Lutomirski 2019-04-18 5:41 ` Kees Cook 2019-04-18 5:41 ` Kees Cook via iommu 2019-04-18 14:34 ` Khalid Aziz 2019-04-18 14:34 ` Khalid Aziz 2019-04-22 19:30 ` Khalid Aziz 2019-04-22 19:30 ` Khalid Aziz [not found] ` <8f9d059d-e720-cd24-faa6-45493fc012e0-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-22 22:23 ` Kees Cook via iommu 2019-04-22 22:23 ` Kees Cook via iommu [not found] ` <CAHk-=whUwOjFW6RjHVM8kNOv1QVLJuHj2Dda0=mpLPdJ1UyatQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2019-04-18 6:14 ` Thomas Gleixner 2019-04-18 6:14 ` Thomas Gleixner 2019-04-17 17:33 ` Khalid Aziz 2019-04-17 17:33 ` Khalid Aziz 2019-04-17 19:49 ` Andy Lutomirski 2019-04-17 19:49 ` Andy Lutomirski [not found] ` <CALCETrXFzWFMrV-zDa4QFjB=4WnC9RZmorBko65dLGhymDpeQw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2019-04-17 19:52 ` Tycho Andersen 2019-04-17 19:52 ` Tycho Andersen 2019-04-17 20:12 ` Khalid Aziz 2019-04-17 20:12 ` Khalid Aziz 2019-05-01 14:49 ` Waiman Long [this message] 2019-05-01 14:49 ` Waiman Long 2019-05-01 15:18 ` Khalid Aziz 2019-05-01 15:18 ` Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 04/13] xpfo, x86: Add support for XPFO for x86-64 Khalid Aziz [not found] ` <c15e7d09dfe3dfdb9947d39ed0ddd6573ff86dbf.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-04 7:52 ` Peter Zijlstra [not found] ` <20190404075206.GP4038-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org> 2019-04-04 15:40 ` Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 05/13] mm: add a user_virt_to_phys symbol Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 06/13] lkdtm: Add test for XPFO Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 07/13] arm64/mm: Add support " Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 08/13] swiotlb: Map the buffer if it was unmapped by XPFO Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 09/13] xpfo: add primitives for mapping underlying memory Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 10/13] arm64/mm, xpfo: temporarily map dcache regions Khalid Aziz 2019-04-03 17:34 ` [RFC PATCH v9 12/13] xpfo, mm: Defer TLB flushes for non-current CPUs (x86 only) Khalid Aziz [not found] ` <4495dda4bfc4a06b3312cc4063915b306ecfaecb.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-04 4:10 ` Andy Lutomirski [not found] ` <CALCETrXMXxnWqN94d83UvGWhkD1BNWiwvH2vsUth1w0T3=0ywQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2019-04-04 22:55 ` Khalid Aziz [not found] ` <91f1dbce-332e-25d1-15f6-0e9cfc8b797b-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2019-04-05 7:17 ` Thomas Gleixner [not found] ` <alpine.DEB.2.21.1904050909520.1802-ecDvlHI5BZPZikZi3RtOZ1XZhhPuCNm+@public.gmane.org> 2019-04-05 14:44 ` Dave Hansen [not found] ` <26b00051-b03c-9fce-1446-52f0d6ed52f8-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> 2019-04-05 15:24 ` Andy Lutomirski 2019-04-05 15:24 ` Andy Lutomirski [not found] ` <DFA69954-3F0F-4B79-A9B5-893D33D87E51-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org> 2019-04-05 15:56 ` Tycho Andersen 2019-04-05 15:56 ` Tycho Andersen 2019-04-05 16:32 ` Andy Lutomirski 2019-04-05 16:32 ` Andy Lutomirski 2019-04-05 15:56 ` Khalid Aziz 2019-04-05 15:56 ` Khalid Aziz 2019-04-05 16:01 ` Dave Hansen 2019-04-05 16:01 ` Dave Hansen [not found] ` <36b999d4-adf6-08a3-2897-d77b9cba20f8-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> 2019-04-05 16:27 ` Andy Lutomirski 2019-04-05 16:27 ` Andy Lutomirski [not found] ` <E0BBD625-6FE0-4A8A-884B-E10FAFC3319E-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org> 2019-04-05 16:41 ` Peter Zijlstra 2019-04-05 16:41 ` Peter Zijlstra 2019-04-05 17:35 ` Khalid Aziz 2019-04-05 17:35 ` Khalid Aziz 2019-04-05 15:44 ` Khalid Aziz 2019-04-05 15:44 ` Khalid Aziz 2019-04-05 15:24 ` Andy Lutomirski 2019-04-05 15:24 ` Andy Lutomirski 2019-04-04 8:18 ` Peter Zijlstra 2019-04-03 17:34 ` [RFC PATCH v9 13/13] xpfo, mm: Optimize XPFO TLB flushes by batching them together Khalid Aziz 2019-04-06 6:40 ` [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership Jon Masters 2019-04-06 6:40 ` Jon Masters
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