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Groups > linux.kernel > #1583465
| From | "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCHv3 21/33] x86/asm: remove __VIRTUAL_MASK_SHIFT==47 assert |
| Date | 2017-02-17 15:30 +0100 |
| Message-ID | <tbRHQ-5pX-17@gated-at.bofh.it> (permalink) |
| References | <tbRy9-5mq-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
We don't need it anymore. 17be0aec74fb ("x86/asm/entry/64: Implement
better check for canonical addresses") made canonical address check
generic wrt. address width.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/x86/entry/entry_64.S | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 044d18ebc43c..f07b4efb34d5 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -265,12 +265,9 @@ return_from_SYSCALL_64:
*
* If width of "canonical tail" ever becomes variable, this will need
* to be updated to remain correct on both old and new CPUs.
+ *
+ * Change top 16 bits to be the sign-extension of 47th bit
*/
- .ifne __VIRTUAL_MASK_SHIFT - 47
- .error "virtual address width changed -- SYSRET checks need update"
- .endif
-
- /* Change top 16 bits to be the sign-extension of 47th bit */
shl $(64 - (__VIRTUAL_MASK_SHIFT+1)), %rcx
sar $(64 - (__VIRTUAL_MASK_SHIFT+1)), %rcx
--
2.11.0
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[PATCHv3 00/33] 5-level paging "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 30/33] x86/mm: make kernel_physical_mapping_init() support 5-level paging "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 14/33] x86/kexec: support p4d_t "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 25/33] x86/dump_pagetables: support 5-level paging "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 12/33] x86/mm: add support of p4d_t in vmalloc_fault() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 10/33] x86/gup: add 5-level paging support "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 27/33] x86/espfix: support 5-level paging "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 05/33] asm-generic: introduce <asm-generic/pgtable-nop4d.h> "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 15/33] x86/efi: handle p4d in EFI pagetables "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
Re: [PATCHv3 15/33] x86/efi: handle p4d in EFI pagetables Matt Fleming <matt@codeblueprint.co.uk> - 2017-02-28 13:40 +0100
[PATCHv3 32/33] x86: enable 5-level paging support "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 26/33] x86/kasan: extend to support 5-level paging "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
[PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:20 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Andy Lutomirski <luto@amacapital.net> - 2017-02-17 18:00 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Dmitry Safonov <0x7f454c46@gmail.com> - 2017-02-21 13:00 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-02-21 13:50 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Dave Hansen <dave.hansen@intel.com> - 2017-02-17 18:30 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Andy Lutomirski <luto@amacapital.net> - 2017-02-17 18:30 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Linus Torvalds <torvalds@linux-foundation.org> - 2017-02-17 21:10 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Andy Lutomirski <luto@amacapital.net> - 2017-02-17 21:30 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Linus Torvalds <torvalds@linux-foundation.org> - 2017-02-17 22:10 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Andy Lutomirski <luto@amacapital.net> - 2017-02-18 00:10 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR hpa@zytor.com - 2017-02-18 00:20 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Michael Pratt <mpratt@google.com> - 2017-02-21 07:20 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Catalin Marinas <catalin.marinas@arm.com> - 2017-02-21 11:40 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-02-21 11:50 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Catalin Marinas <catalin.marinas@arm.com> - 2017-02-21 12:00 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Dave Hansen <dave.hansen@intel.com> - 2017-02-17 22:10 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Linus Torvalds <torvalds@linux-foundation.org> - 2017-02-17 22:20 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR hpa@zytor.com - 2017-02-17 23:00 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-02-18 10:30 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-02-20 14:20 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR Dave Hansen <dave.hansen@intel.com> - 2017-02-21 21:50 +0100
Re: [PATCHv3 33/33] mm, x86: introduce PR_SET_MAX_VADDR and PR_GET_MAX_VADDR "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-02-22 14:10 +0100
[PATCHv3 23/33] x86/paravirt: make paravirt code support 5-level paging "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 13/33] x86/power: support p4d_t in hibernate code "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 28/33] x86/mm: add support of additional page table level during early boot "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 21/33] x86/asm: remove __VIRTUAL_MASK_SHIFT==47 assert "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 04/33] arch, mm: convert all architectures to use 5level-fixup.h "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 01/33] x86/cpufeature: Add 5-level paging detection "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 08/33] x86: basic changes into headers for 5-level paging "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 03/33] asm-generic: introduce __ARCH_USE_5LEVEL_HACK "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 07/33] mm: introduce __p4d_alloc() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 16/33] x86/mm/pat: handle additional page table "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 19/33] x86: convert the rest of the code to support p4d_t "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 11/33] x86/ident_map: add 5-level paging support "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
[PATCHv3 18/33] x86/xen: convert __xen_pgd_walk() and xen_cleanmfnmap() to support p4d "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-02-17 15:30 +0100
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