All of lore.kernel.org
 help / color / mirror / Atom feed
From: Thomas Gleixner <tglx@linutronix.de>
To: Joerg Roedel <joro@8bytes.org>
Cc: Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andy Lutomirski <luto@kernel.org>,
	Dave Hansen <dave.hansen@intel.com>,
	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>,
	aliguori@amazon.com, daniel.gruss@iaik.tugraz.at,
	hughd@google.com, keescook@google.com,
	Andrea Arcangeli <aarcange@redhat.com>,
	Waiman Long <llong@redhat.com>,
	jroedel@suse.de
Subject: Re: [RFC PATCH 00/16] PTI support for x86-32
Date: Tue, 16 Jan 2018 22:20:40 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.20.1801162212080.2366@nanos> (raw)
In-Reply-To: <1516120619-1159-1-git-send-email-joro@8bytes.org>

On Tue, 16 Jan 2018, Joerg Roedel wrote:
> here is my current WIP code to enable PTI on x86-32. It is
> still in a pretty early state, but it successfully boots my
> KVM guest with PAE and with legacy paging. The existing PTI
> code for x86-64 already prepares a lot of the stuff needed
> for 32 bit too, thanks for that to all the people involved
> in its development :)

>  16 files changed, 333 insertions(+), 123 deletions(-)

Impressively small and well done !

Can you please make that patch set against

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-pti-for-linus

so we immediately have it backportable for 4.14 stable? It's only a trivial
conflict in pgtable.h, but we'd like to make the life of stable as simple
as possible. They have enough headache with the pre 4.14 trees.

We can pick some of the simple patches which make defines and inlines
available out of the pile right away and apply them to x86/pti to shrink
the amount of stuff you have to worry about.

Thanks,

	tglx

WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de>
To: Joerg Roedel <joro@8bytes.org>
Cc: Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andy Lutomirski <luto@kernel.org>,
	Dave Hansen <dave.hansen@intel.com>,
	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>,
	aliguori@amazon.com, daniel.gruss@iaik.tugraz.at,
	hughd@google.com, keescook@google.com,
	Andrea Arcangeli <aarcange@redhat.com>,
	Waiman Long <llong@redhat.com>,
	jroedel@suse.de
Subject: Re: [RFC PATCH 00/16] PTI support for x86-32
Date: Tue, 16 Jan 2018 22:20:40 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.20.1801162212080.2366@nanos> (raw)
In-Reply-To: <1516120619-1159-1-git-send-email-joro@8bytes.org>

On Tue, 16 Jan 2018, Joerg Roedel wrote:
> here is my current WIP code to enable PTI on x86-32. It is
> still in a pretty early state, but it successfully boots my
> KVM guest with PAE and with legacy paging. The existing PTI
> code for x86-64 already prepares a lot of the stuff needed
> for 32 bit too, thanks for that to all the people involved
> in its development :)

>  16 files changed, 333 insertions(+), 123 deletions(-)

Impressively small and well done !

Can you please make that patch set against

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-pti-for-linus

so we immediately have it backportable for 4.14 stable? It's only a trivial
conflict in pgtable.h, but we'd like to make the life of stable as simple
as possible. They have enough headache with the pre 4.14 trees.

We can pick some of the simple patches which make defines and inlines
available out of the pile right away and apply them to x86/pti to shrink
the amount of stuff you have to worry about.

Thanks,

	tglx


--
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>

  parent reply	other threads:[~2018-01-16 21:20 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
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 [this message]
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

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.2.20.1801162212080.2366@nanos \
    --to=tglx@linutronix.de \
    --cc=David.Laight@aculab.com \
    --cc=aarcange@redhat.com \
    --cc=aliguori@amazon.com \
    --cc=boris.ostrovsky@oracle.com \
    --cc=bp@alien8.de \
    --cc=brgerst@gmail.com \
    --cc=daniel.gruss@iaik.tugraz.at \
    --cc=dave.hansen@intel.com \
    --cc=dvlasenk@redhat.com \
    --cc=eduval@amazon.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=hpa@zytor.com \
    --cc=hughd@google.com \
    --cc=jgross@suse.com \
    --cc=jkosina@suse.cz \
    --cc=joro@8bytes.org \
    --cc=jpoimboe@redhat.com \
    --cc=jroedel@suse.de \
    --cc=keescook@google.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=llong@redhat.com \
    --cc=luto@kernel.org \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=torvalds@linux-foundation.org \
    --cc=will.deacon@arm.com \
    --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: link
Be 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.