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Groups > linux.kernel > #1611416 > unrolled thread
| Started by | "H. Peter Anvin" <hpa@zytor.com> |
|---|---|
| First post | 2017-03-29 00:30 +0200 |
| Last post | 2017-03-29 00:50 +0200 |
| Articles | 2 — 2 participants |
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Re: [PATCH 3/8] x86/mm: Define virtual memory map for 5-level paging "H. Peter Anvin" <hpa@zytor.com> - 2017-03-29 00:30 +0200
Re: [PATCH 3/8] x86/mm: Define virtual memory map for 5-level paging "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-03-29 00:50 +0200
| From | "H. Peter Anvin" <hpa@zytor.com> |
|---|---|
| Date | 2017-03-29 00:30 +0200 |
| Subject | Re: [PATCH 3/8] x86/mm: Define virtual memory map for 5-level paging |
| Message-ID | <tq7MJ-5VB-3@gated-at.bofh.it> |
On 03/27/17 09:29, Kirill A. Shutemov wrote: > +fffe000000000000 - fffe007fffffffff (=39 bits) %esp fixup stacks Why move this? -hpa
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| From | "Kirill A. Shutemov" <kirill@shutemov.name> |
|---|---|
| Date | 2017-03-29 00:50 +0200 |
| Message-ID | <tq866-64z-5@gated-at.bofh.it> |
| In reply to | #1611416 |
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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