From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Andi Kleen <ak@linux.intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Andy Lutomirski <luto@amacapital.net>,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/8] x86/mm: Define virtual memory map for 5-level paging
Date: Wed, 29 Mar 2017 01:47:20 +0300 [thread overview]
Message-ID: <20170328224720.7ir7godugb6eqzm5@node.shutemov.name> (raw)
In-Reply-To: <1ae86ad3-deae-1b27-d7a9-ea6b20edc039@zytor.com>
On Tue, Mar 28, 2017 at 03:21:39PM -0700, H. Peter Anvin wrote:
> On 03/27/17 09:29, Kirill A. Shutemov wrote:
> > +fffe000000000000 - fffe007fffffffff (=39 bits) %esp fixup stacks
>
> Why move this?
You're right. There's no reason to.
It's accident due to ESPFIX_BASE_ADDR being defined using PGDIR_SHIFT.
We should use P4D_SHIFT instead to produce consistent result across
paging modes.
I'll update the patch tomorrow. Thanks for noticing this.
--
Kirill A. Shutemov
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WARNING: multiple messages have this Message-ID (diff)
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Andi Kleen <ak@linux.intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Andy Lutomirski <luto@amacapital.net>,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/8] x86/mm: Define virtual memory map for 5-level paging
Date: Wed, 29 Mar 2017 01:47:20 +0300 [thread overview]
Message-ID: <20170328224720.7ir7godugb6eqzm5@node.shutemov.name> (raw)
Message-ID: <20170328224720.k5lyLBdQFVmHn17WmtyzZ-zspS2XEoCgzGvmwvPmNeA@z> (raw)
In-Reply-To: <1ae86ad3-deae-1b27-d7a9-ea6b20edc039@zytor.com>
On Tue, Mar 28, 2017 at 03:21:39PM -0700, H. Peter Anvin wrote:
> On 03/27/17 09:29, Kirill A. Shutemov wrote:
> > +fffe000000000000 - fffe007fffffffff (=39 bits) %esp fixup stacks
>
> Why move this?
You're right. There's no reason to.
It's accident due to ESPFIX_BASE_ADDR being defined using PGDIR_SHIFT.
We should use P4D_SHIFT instead to produce consistent result across
paging modes.
I'll update the patch tomorrow. Thanks for noticing this.
--
Kirill A. Shutemov
next prev parent reply other threads:[~2017-03-28 22:47 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-27 16:29 [PATCH 0/8] x86: 5-level paging enabling for v4.12, Part 3 Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-27 16:29 ` [PATCH 1/8] x86/boot: Detect 5-level paging support Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-28 6:06 ` Ingo Molnar
2017-03-28 6:06 ` Ingo Molnar
2017-03-28 10:45 ` [PATCHv2 " Kirill A. Shutemov
2017-03-28 10:45 ` Kirill A. Shutemov
2017-03-27 16:29 ` [PATCH 2/8] x86/asm: Remove __VIRTUAL_MASK_SHIFT==47 assert Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-27 16:29 ` [PATCH 3/8] x86/mm: Define virtual memory map for 5-level paging Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-28 22:21 ` H. Peter Anvin
2017-03-28 22:21 ` H. Peter Anvin
2017-03-28 22:47 ` Kirill A. Shutemov [this message]
2017-03-28 22:47 ` Kirill A. Shutemov
2017-03-29 13:20 ` [PATCHv2 " Kirill A. Shutemov
2017-03-27 16:29 ` [PATCH 4/8] x86/paravirt: Make paravirt code support " Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-27 16:29 ` [PATCH 5/8] x86/mm: Add basic defines/helpers for CONFIG_X86_5LEVEL Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-28 6:11 ` Ingo Molnar
2017-03-28 6:11 ` Ingo Molnar
2017-03-28 10:46 ` [PATCHv2 " Kirill A. Shutemov
2017-03-28 10:46 ` Kirill A. Shutemov
2017-03-27 16:29 ` [PATCH 6/8] x86/dump_pagetables: Add support 5-level paging Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-28 6:12 ` Ingo Molnar
2017-03-28 6:12 ` Ingo Molnar
2017-03-28 9:30 ` Kirill A. Shutemov
2017-03-28 9:30 ` Kirill A. Shutemov
2017-03-28 9:39 ` Ingo Molnar
2017-03-28 9:39 ` Ingo Molnar
2017-03-28 10:48 ` [PATCHv2 " Kirill A. Shutemov
2017-03-28 10:48 ` Kirill A. Shutemov
2017-03-28 18:55 ` Borislav Petkov
2017-03-28 21:15 ` Kirill A. Shutemov
2017-03-28 21:15 ` Kirill A. Shutemov
2017-03-28 21:38 ` Borislav Petkov
2017-03-29 15:00 ` Kirill A. Shutemov
2017-03-30 6:22 ` Ingo Molnar
2017-03-30 6:22 ` Ingo Molnar
2017-03-27 16:29 ` [PATCH 7/8] x86/kasan: Extend to " Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-27 16:29 ` [PATCH 8/8] x86/espfix: Add " Kirill A. Shutemov
2017-03-27 16:29 ` Kirill A. Shutemov
2017-03-29 13:22 ` [PATCHv2 " Kirill A. Shutemov
2017-03-29 13:22 ` Kirill A. Shutemov
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