From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: 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>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Andy Lutomirski <luto@amacapital.net>,
Michal Hocko <mhocko@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv3 00/13] Boot-time switching between 4- and 5-level paging
Date: Mon, 7 Aug 2017 17:14:38 +0300 [thread overview]
Message-ID: <20170807141451.80934-1-kirill.shutemov@linux.intel.com> (raw)
The basic idea is to implement the same logic as pgtable-nop4d.h provides,
but at runtime.
Runtime folding is only implemented for CONFIG_X86_5LEVEL=y case. With the
option disabled, we do compile-time folding as before..
Initially, I tried to fold pgd instread. I've got to shell, but it
required a lot of hacks as kernel threats pgd in a special way.
Please review and consider applying.
v3:
- Make sparsemem data stuctures allocation dynamic to lower memory overhead on
4-level paging machines;
- Allow XEN_PV and XEN_PVH to be enabled with X86_5LEVEL;
- XEN cleanups;
Kirill A. Shutemov (13):
mm, sparsemem: Allocate mem_section at runtime for SPARSEMEM_EXTREME
x86/kasan: Use the same shadow offset for 4- and 5-level paging
x86/xen: Provide pre-built page tables only for XEN_PV and XEN_PVH
x86/xen: Drop 5-level paging support code from XEN_PV code
x86/boot/compressed/64: Detect and handle 5-level paging at boot-time
x86/mm: Make virtual memory layout movable for CONFIG_X86_5LEVEL
x86/mm: Make PGDIR_SHIFT and PTRS_PER_P4D variable
x86/mm: Handle boot-time paging mode switching at early boot
x86/mm: Fold p4d page table layer at runtime
x86/mm: Replace compile-time checks for 5-level with runtime-time
x86/mm: Allow to boot without la57 if CONFIG_X86_5LEVEL=y
x86/xen: Allow XEN_PV and XEN_PVH to be enabled with X86_5LEVEL
x86/mm: Offset boot-time paging mode switching cost
Documentation/x86/x86_64/5level-paging.txt | 9 +-
arch/x86/Kconfig | 5 +-
arch/x86/boot/compressed/head_64.S | 24 ++++
arch/x86/boot/compressed/kaslr.c | 14 +++
arch/x86/boot/compressed/misc.h | 5 +
arch/x86/entry/entry_64.S | 12 ++
arch/x86/include/asm/kaslr.h | 4 -
arch/x86/include/asm/page_64.h | 4 +
arch/x86/include/asm/page_64_types.h | 15 +--
arch/x86/include/asm/paravirt.h | 21 ++--
arch/x86/include/asm/pgalloc.h | 5 +-
arch/x86/include/asm/pgtable.h | 10 +-
arch/x86/include/asm/pgtable_32.h | 2 +
arch/x86/include/asm/pgtable_32_types.h | 2 +
arch/x86/include/asm/pgtable_64_types.h | 51 +++++---
arch/x86/include/asm/pgtable_types.h | 67 +++--------
arch/x86/include/asm/processor.h | 2 +-
arch/x86/include/asm/required-features.h | 8 +-
arch/x86/include/asm/sparsemem.h | 9 +-
arch/x86/kernel/Makefile | 3 +-
arch/x86/kernel/head64.c | 71 ++++++++++--
arch/x86/kernel/head_64.S | 35 +++---
arch/x86/kernel/setup.c | 5 +-
arch/x86/mm/dump_pagetables.c | 20 ++--
arch/x86/mm/fault.c | 2 +-
arch/x86/mm/ident_map.c | 2 +-
arch/x86/mm/init_64.c | 32 ++---
arch/x86/mm/kasan_init_64.c | 94 +++++++++++----
arch/x86/mm/kaslr.c | 27 ++---
arch/x86/platform/efi/efi_64.c | 6 +-
arch/x86/power/hibernate_64.c | 6 +-
arch/x86/xen/Kconfig | 5 -
arch/x86/xen/mmu_pv.c | 180 +++++++++++++----------------
include/asm-generic/5level-fixup.h | 1 +
include/asm-generic/pgtable-nop4d.h | 1 +
include/linux/kasan.h | 2 +-
include/linux/mmzone.h | 2 +-
mm/kasan/kasan_init.c | 2 +-
mm/page_alloc.c | 10 ++
mm/sparse.c | 3 +-
40 files changed, 462 insertions(+), 316 deletions(-)
--
2.13.2
next reply other threads:[~2017-08-07 14:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-07 14:14 Kirill A. Shutemov [this message]
2017-08-07 14:14 ` [PATCHv3 01/13] mm, sparsemem: Allocate mem_section at runtime for SPARSEMEM_EXTREME Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 02/13] x86/kasan: Use the same shadow offset for 4- and 5-level paging Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 03/13] x86/xen: Provide pre-built page tables only for XEN_PV and XEN_PVH Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 04/13] x86/xen: Drop 5-level paging support code from XEN_PV code Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 05/13] x86/boot/compressed/64: Detect and handle 5-level paging at boot-time Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 06/13] x86/mm: Make virtual memory layout movable for CONFIG_X86_5LEVEL Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 07/13] x86/mm: Make PGDIR_SHIFT and PTRS_PER_P4D variable Kirill A. Shutemov
2017-08-07 15:48 ` Andi Kleen
2017-08-07 14:14 ` [PATCHv3 08/13] x86/mm: Handle boot-time paging mode switching at early boot Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 09/13] x86/mm: Fold p4d page table layer at runtime Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 10/13] x86/mm: Replace compile-time checks for 5-level with runtime-time Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 11/13] x86/mm: Allow to boot without la57 if CONFIG_X86_5LEVEL=y Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 12/13] x86/xen: Allow XEN_PV and XEN_PVH to be enabled with X86_5LEVEL Kirill A. Shutemov
2017-08-07 14:14 ` [PATCHv3 13/13] x86/mm: Offset boot-time paging mode switching cost Kirill A. Shutemov
2017-08-07 15:54 ` Andi Kleen
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