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authorLinus Torvalds <torvalds@linux-foundation.org>2018-10-23 17:05:28 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-23 17:05:28 +0100
commit99792e0cea1ed733cdc8d0758677981e0cbebfed (patch)
treeacf6868f48f687dd8667ee4f99c156415ea8ff7b /arch/x86/Kconfig
parent382d72a9aa525b56ab8453ce61751fa712414d3d (diff)
parent977e4be5eb714c48a67afc26a6c477f24130a1f2 (diff)
downloadlinux-99792e0cea1ed733cdc8d0758677981e0cbebfed.tar.bz2
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm updates from Ingo Molnar: "Lots of changes in this cycle: - Lots of CPA (change page attribute) optimizations and related cleanups (Thomas Gleixner, Peter Zijstra) - Make lazy TLB mode even lazier (Rik van Riel) - Fault handler cleanups and improvements (Dave Hansen) - kdump, vmcore: Enable kdumping encrypted memory with AMD SME enabled (Lianbo Jiang) - Clean up VM layout documentation (Baoquan He, Ingo Molnar) - ... plus misc other fixes and enhancements" * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits) x86/stackprotector: Remove the call to boot_init_stack_canary() from cpu_startup_entry() x86/mm: Kill stray kernel fault handling comment x86/mm: Do not warn about PCI BIOS W+X mappings resource: Clean it up a bit resource: Fix find_next_iomem_res() iteration issue resource: Include resource end in walk_*() interfaces x86/kexec: Correct KEXEC_BACKUP_SRC_END off-by-one error x86/mm: Remove spurious fault pkey check x86/mm/vsyscall: Consider vsyscall page part of user address space x86/mm: Add vsyscall address helper x86/mm: Fix exception table comments x86/mm: Add clarifying comments for user addr space x86/mm: Break out user address space handling x86/mm: Break out kernel address space handling x86/mm: Clarify hardware vs. software "error_code" x86/mm/tlb: Make lazy TLB mode lazier x86/mm/tlb: Add freed_tables element to flush_tlb_info x86/mm/tlb: Add freed_tables argument to flush_tlb_mm_range smp,cpumask: introduce on_each_cpu_cond_mask smp: use __cpumask_set_cpu in on_each_cpu_cond ...
Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8282985d438a..ff425a2d286c 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1487,6 +1487,14 @@ config X86_DIRECT_GBPAGES
supports them), so don't confuse the user by printing
that we have them enabled.
+config X86_CPA_STATISTICS
+ bool "Enable statistic for Change Page Attribute"
+ depends on DEBUG_FS
+ ---help---
+ Expose statistics about the Change Page Attribute mechanims, which
+ helps to determine the effectivness of preserving large and huge
+ page mappings when mapping protections are changed.
+
config ARCH_HAS_MEM_ENCRYPT
def_bool y