From: Dave Hansen <dave.hansen@intel.com> To: Linus Torvalds <torvalds@linux-foundation.org>, Joerg Roedel <joro@8bytes.org> Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>, the arch/x86 maintainers <x86@kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>, Andy Lutomirski <luto@kernel.org>, Josh Poimboeuf <jpoimboe@redhat.com>, Juergen Gross <jgross@suse.com>, Peter Zijlstra <peterz@infradead.org>, Borislav Petkov <bp@alien8.de>, Jiri Kosina <jkosina@suse.cz>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Brian Gerst <brgerst@gmail.com>, David Laight <David.Laight@aculab.com>, Denys Vlasenko <dvlasenk@redhat.com>, Eduardo Valentin <eduval@amazon.com>, Greg KH <gregkh@linuxfoundation.org>, Will Deacon <will.deacon@arm.com>, "Liguori, Anthony" <aliguori@amazon.com>, Daniel Gruss <daniel.gruss@iaik.tugraz.at>, Hugh Dickins <hughd@google.com>, Kees Cook <keescook@google.com>, Andrea Arcangeli <aarcange@redhat.com>, Waiman Long <llong@redhat.com>, Joerg Roedel <jroedel@suse.de> Subject: Re: [RFC PATCH 00/16] PTI support for x86-32 Date: Tue, 16 Jan 2018 11:02:28 -0800 [thread overview] Message-ID: <90748aea-6fc0-48a5-d154-c98465fea42c@intel.com> (raw) In-Reply-To: <CA+55aFx8V4JKfqZ+a9K355mopVYBBLNdx5Bh_oQuTGwdBFnoWg@mail.gmail.com> On 01/16/2018 10:59 AM, Linus Torvalds wrote: >> The code has not run on bare-metal yet, I'll test that in >> the next days once I setup a 32 bit box again. I also havn't >> tested Wine and DosEMU yet, so this might also be broken. > .. and please run all the segment and syscall selfchecks that Andy has written. > > But yes, checking bare metal, and checking the "odd" applications like > Wine and dosemu (and kvm etc) within the PTI kernel is certainly a > good idea. I tried to document a list of the "gotchas" that tripped us up during the 64-bit effort under "Testing": > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/pti&id=01c9b17bf673b05bb401b76ec763e9730ccf1376 NMIs were a biggie too.
WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave.hansen@intel.com> To: Linus Torvalds <torvalds@linux-foundation.org>, Joerg Roedel <joro@8bytes.org> Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>, the arch/x86 maintainers <x86@kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>, Andy Lutomirski <luto@kernel.org>, Josh Poimboeuf <jpoimboe@redhat.com>, Juergen Gross <jgross@suse.com>, Peter Zijlstra <peterz@infradead.org>, Borislav Petkov <bp@alien8.de>, Jiri Kosina <jkosina@suse.cz>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Brian Gerst <brgerst@gmail.com>, David Laight <David.Laight@aculab.com>, Denys Vlasenko <dvlasenk@redhat.com>, Eduardo Valentin <eduval@amazon.com>, Greg KH <gregkh@linuxfoundation.org>, Will Deacon <will.deacon@arm.com>, "Liguori, Anthony" <aliguori@amazon.com>, Daniel Gruss <daniel.gruss@iaik.tugraz.at>, Hugh Dickins <hughd@google.com>, Kees Cook <keescook@google.com>, Andrea Arcangeli <aarcange@redhat.com>, Waiman Long <llong@redhat.com>, Joerg Roedel <jroedel@suse.de> Subject: Re: [RFC PATCH 00/16] PTI support for x86-32 Date: Tue, 16 Jan 2018 11:02:28 -0800 [thread overview] Message-ID: <90748aea-6fc0-48a5-d154-c98465fea42c@intel.com> (raw) In-Reply-To: <CA+55aFx8V4JKfqZ+a9K355mopVYBBLNdx5Bh_oQuTGwdBFnoWg@mail.gmail.com> On 01/16/2018 10:59 AM, Linus Torvalds wrote: >> The code has not run on bare-metal yet, I'll test that in >> the next days once I setup a 32 bit box again. I also havn't >> tested Wine and DosEMU yet, so this might also be broken. > .. and please run all the segment and syscall selfchecks that Andy has written. > > But yes, checking bare metal, and checking the "odd" applications like > Wine and dosemu (and kvm etc) within the PTI kernel is certainly a > good idea. I tried to document a list of the "gotchas" that tripped us up during the 64-bit effort under "Testing": > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/pti&id=01c9b17bf673b05bb401b76ec763e9730ccf1376 NMIs were a biggie too. -- 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:[~2018-01-16 19:02 UTC|newest] Thread overview: 183+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-01-16 16:36 [RFC PATCH 00/16] PTI support for x86-32 Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 01/16] x86/entry/32: Rename TSS_sysenter_sp0 to TSS_sysenter_stack Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 18:35 ` Thomas Gleixner 2018-01-16 18:35 ` Thomas Gleixner 2018-01-16 16:36 ` [PATCH 02/16] x86/entry/32: Enter the kernel via trampoline stack Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 20:30 ` Thomas Gleixner 2018-01-16 20:30 ` Thomas Gleixner 2018-01-16 22:37 ` Andy Lutomirski 2018-01-16 22:37 ` Andy Lutomirski 2018-01-16 22:45 ` Andy Lutomirski 2018-01-16 22:45 ` Andy Lutomirski 2018-01-17 9:18 ` Joerg Roedel 2018-01-17 9:18 ` Joerg Roedel 2018-01-17 18:10 ` Andy Lutomirski 2018-01-17 18:10 ` Andy Lutomirski 2018-01-19 9:55 ` Joerg Roedel 2018-01-19 9:55 ` Joerg Roedel 2018-01-19 16:30 ` Andy Lutomirski 2018-01-19 16:30 ` Andy Lutomirski 2018-01-22 10:11 ` Joerg Roedel 2018-01-22 10:11 ` Joerg Roedel 2018-01-22 17:46 ` Andy Lutomirski 2018-01-22 17:46 ` Andy Lutomirski 2018-01-17 2:47 ` Boris Ostrovsky 2018-01-17 2:47 ` Boris Ostrovsky 2018-01-17 9:02 ` Joerg Roedel 2018-01-17 9:02 ` Joerg Roedel 2018-01-17 14:04 ` Andrew Cooper 2018-01-17 14:04 ` Andrew Cooper 2018-01-17 15:22 ` Boris Ostrovsky 2018-01-17 15:22 ` Boris Ostrovsky 2018-01-16 16:36 ` [PATCH 03/16] x86/entry/32: Leave the kernel via the " Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 22:48 ` Andy Lutomirski 2018-01-16 22:48 ` Andy Lutomirski 2018-01-17 9:24 ` Joerg Roedel 2018-01-17 9:24 ` Joerg Roedel 2018-01-17 13:57 ` Brian Gerst 2018-01-17 13:57 ` Brian Gerst 2018-01-17 14:00 ` Brian Gerst 2018-01-17 14:00 ` Brian Gerst 2018-01-17 14:14 ` Joerg Roedel 2018-01-17 14:14 ` Joerg Roedel 2018-01-17 14:45 ` Josh Poimboeuf 2018-01-17 14:45 ` Josh Poimboeuf 2018-01-17 14:10 ` Joerg Roedel 2018-01-17 14:10 ` Joerg Roedel 2018-01-17 18:12 ` Andy Lutomirski 2018-01-17 18:12 ` Andy Lutomirski 2018-01-19 9:57 ` Joerg Roedel 2018-01-19 9:57 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 04/16] x86/pti: Define X86_CR3_PTI_PCID_USER_BIT on x86_32 Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 22:46 ` Andy Lutomirski 2018-01-16 22:46 ` Andy Lutomirski 2018-01-17 9:26 ` Joerg Roedel 2018-01-17 9:26 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 05/16] x86/pgtable: Move pgdp kernel/user conversion functions to pgtable.h Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 06/16] x86/mm/ldt: Reserve high address-space range for the LDT Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 16:52 ` Peter Zijlstra 2018-01-16 16:52 ` Peter Zijlstra 2018-01-16 17:13 ` Joerg Roedel 2018-01-16 17:13 ` Joerg Roedel 2018-01-16 17:31 ` Peter Zijlstra 2018-01-16 17:31 ` Peter Zijlstra 2018-01-16 17:34 ` Waiman Long 2018-01-16 17:34 ` Waiman Long 2018-01-16 22:51 ` Andy Lutomirski 2018-01-16 22:51 ` Andy Lutomirski 2018-01-17 7:59 ` Peter Zijlstra 2018-01-17 7:59 ` Peter Zijlstra 2018-01-16 16:36 ` [PATCH 07/16] x86/mm: Move two more functions from pgtable_64.h to pgtable.h Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 18:03 ` Dave Hansen 2018-01-16 18:03 ` Dave Hansen 2018-01-16 19:11 ` Joerg Roedel 2018-01-16 19:11 ` Joerg Roedel 2018-01-16 19:34 ` Thomas Gleixner 2018-01-16 19:34 ` Thomas Gleixner 2018-01-16 16:36 ` [PATCH 08/16] x86/pgtable/32: Allocate 8k page-tables when PTI is enabled Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-17 23:43 ` Andy Lutomirski 2018-01-17 23:43 ` Andy Lutomirski 2018-01-19 9:57 ` Joerg Roedel 2018-01-19 9:57 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 09/16] x86/mm/pti: Clone CPU_ENTRY_AREA on PMD level on x86_32 Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 21:03 ` Thomas Gleixner 2018-01-16 21:03 ` Thomas Gleixner 2018-01-16 16:36 ` [PATCH 10/16] x86/mm/pti: Populate valid user pud entries Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 18:06 ` Dave Hansen 2018-01-16 18:06 ` Dave Hansen 2018-01-16 19:41 ` Joerg Roedel 2018-01-16 19:41 ` Joerg Roedel 2018-01-16 21:06 ` Thomas Gleixner 2018-01-16 21:06 ` Thomas Gleixner 2018-01-16 16:36 ` [PATCH 11/16] x86/mm/pgtable: Move pti_set_user_pgd() to pgtable.h Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 12/16] x86/mm/pae: Populate the user page-table with user pgd's Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 18:11 ` Dave Hansen 2018-01-16 18:11 ` Dave Hansen 2018-01-16 19:44 ` Joerg Roedel 2018-01-16 19:44 ` Joerg Roedel 2018-01-16 21:10 ` Thomas Gleixner 2018-01-16 21:10 ` Thomas Gleixner 2018-01-16 21:15 ` Dave Hansen 2018-01-16 21:15 ` Dave Hansen 2018-01-16 16:36 ` [PATCH 13/16] x86/mm/pti: Add an overflow check to pti_clone_pmds() Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 14/16] x86/mm/legacy: Populate the user page-table with user pgd's Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-17 23:41 ` Andy Lutomirski 2018-01-17 23:41 ` Andy Lutomirski 2018-01-16 16:36 ` [PATCH 15/16] x86/entry/32: Switch between kernel and user cr3 on entry/exit Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 16:36 ` [PATCH 16/16] x86/pti: Allow CONFIG_PAGE_TABLE_ISOLATION for x86_32 Joerg Roedel 2018-01-16 16:36 ` Joerg Roedel 2018-01-16 18:14 ` [RFC PATCH 00/16] PTI support for x86-32 Dave Hansen 2018-01-16 18:14 ` Dave Hansen 2018-01-16 19:46 ` Joerg Roedel 2018-01-16 19:46 ` Joerg Roedel 2018-01-16 18:59 ` Linus Torvalds 2018-01-16 18:59 ` Linus Torvalds 2018-01-16 19:02 ` Dave Hansen [this message] 2018-01-16 19:02 ` Dave Hansen 2018-01-16 19:21 ` Andrew Cooper 2018-01-16 19:21 ` Andrew Cooper 2018-01-16 19:55 ` Joerg Roedel 2018-01-16 19:55 ` Joerg Roedel 2018-01-16 21:20 ` Thomas Gleixner 2018-01-16 21:20 ` Thomas Gleixner 2018-01-17 9:55 ` Joerg Roedel 2018-01-17 9:55 ` Joerg Roedel 2018-01-16 22:26 ` Andy Lutomirski 2018-01-16 22:26 ` Andy Lutomirski 2018-01-17 9:33 ` Joerg Roedel 2018-01-17 9:33 ` Joerg Roedel 2018-01-19 10:55 ` Pavel Machek 2018-01-19 11:07 ` Joerg Roedel 2018-01-19 11:07 ` Joerg Roedel 2018-01-19 12:58 ` Pavel Machek 2018-01-21 20:13 ` Nadav Amit 2018-01-21 20:13 ` Nadav Amit 2018-01-21 20:44 ` Nadav Amit 2018-01-21 20:44 ` Nadav Amit 2018-01-21 23:46 ` Nadav Amit 2018-01-21 23:46 ` Nadav Amit 2018-01-22 2:11 ` Linus Torvalds 2018-01-22 2:11 ` Linus Torvalds 2018-01-22 2:20 ` hpa 2018-01-22 2:20 ` hpa 2018-01-22 20:14 ` Linus Torvalds 2018-01-22 20:14 ` Linus Torvalds 2018-01-22 21:10 ` H. Peter Anvin 2018-01-22 21:10 ` H. Peter Anvin 2018-01-23 14:38 ` Alan Cox 2018-01-23 14:38 ` Alan Cox 2018-01-22 2:27 ` Nadav Amit 2018-01-22 2:27 ` Nadav Amit 2018-01-22 8:56 ` Joerg Roedel 2018-01-22 8:56 ` Joerg Roedel 2018-01-23 14:57 ` Alan Cox 2018-01-23 14:57 ` Alan Cox 2018-01-25 17:09 ` Alan Cox 2018-01-25 17:09 ` Alan Cox 2018-01-26 12:36 ` Joerg Roedel 2018-01-26 12:36 ` Joerg Roedel 2018-01-22 9:55 ` David Laight 2018-01-22 10:04 ` Joerg Roedel 2018-01-22 10:04 ` Joerg Roedel 2018-01-24 18:58 ` Krzysztof Mazur 2018-01-24 18:58 ` Krzysztof Mazur 2018-01-25 22:09 ` Nadav Amit 2018-01-25 22:09 ` Nadav Amit 2018-01-26 9:28 ` Krzysztof Mazur 2018-01-26 9:28 ` Krzysztof Mazur
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