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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 13:35:29 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 13:35:29 -0700 |
commit | 6b0a02e86c293c32a50d49b33a1f04420585d40b (patch) | |
tree | 048e4f6f19548cd0052395867327b4dcf2d19546 /arch/x86/kernel/head64.c | |
parent | 71b8ebbf3d7bee88427eb207ef643f2f6447c625 (diff) | |
parent | e3e288121408c3abeed5af60b87b95c847143845 (diff) | |
download | linux-stable-6b0a02e86c293c32a50d49b33a1f04420585d40b.tar.gz linux-stable-6b0a02e86c293c32a50d49b33a1f04420585d40b.tar.bz2 linux-stable-6b0a02e86c293c32a50d49b33a1f04420585d40b.zip |
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 pti updates from Thomas Gleixner:
"Another series of PTI related changes:
- Remove the manual stack switch for user entries from the idtentry
code. This debloats entry by 5k+ bytes of text.
- Use the proper types for the asm/bootparam.h defines to prevent
user space compile errors.
- Use PAGE_GLOBAL for !PCID systems to gain back performance
- Prevent setting of huge PUD/PMD entries when the entries are not
leaf entries otherwise the entries to which the PUD/PMD points to
and are populated get lost"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pgtable: Don't set huge PUD/PMD on non-leaf entries
x86/pti: Leave kernel text global for !PCID
x86/pti: Never implicitly clear _PAGE_GLOBAL for kernel image
x86/pti: Enable global pages for shared areas
x86/mm: Do not forbid _PAGE_RW before init for __ro_after_init
x86/mm: Comment _PAGE_GLOBAL mystery
x86/mm: Remove extra filtering in pageattr code
x86/mm: Do not auto-massage page protections
x86/espfix: Document use of _PAGE_GLOBAL
x86/mm: Introduce "default" kernel PTE mask
x86/mm: Undo double _PAGE_PSE clearing
x86/mm: Factor out pageattr _PAGE_GLOBAL setting
x86/entry/64: Drop idtentry's manual stack switch for user entries
x86/uapi: Fix asm/bootparam.h userspace compilation errors
Diffstat (limited to 'arch/x86/kernel/head64.c')
-rw-r--r-- | arch/x86/kernel/head64.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 0c855deee165..0c408f8c4ed4 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -195,6 +195,8 @@ unsigned long __head __startup_64(unsigned long physaddr, pud[i + 1] = (pudval_t)pmd + pgtable_flags; pmd_entry = __PAGE_KERNEL_LARGE_EXEC & ~_PAGE_GLOBAL; + /* Filter out unsupported __PAGE_KERNEL_* bits: */ + pmd_entry &= __supported_pte_mask; pmd_entry += sme_get_me_mask(); pmd_entry += physaddr; |