forked from Minki/linux
caf9a82657
Pull x86 PTI preparatory patches from Thomas Gleixner:
"Todays Advent calendar window contains twentyfour easy to digest
patches. The original plan was to have twenty three matching the date,
but a late fixup made that moot.
- Move the cpu_entry_area mapping out of the fixmap into a separate
address space. That's necessary because the fixmap becomes too big
with NRCPUS=8192 and this caused already subtle and hard to
diagnose failures.
The top most patch is fresh from today and cures a brain slip of
that tall grumpy german greybeard, who ignored the intricacies of
32bit wraparounds.
- Limit the number of CPUs on 32bit to 64. That's insane big already,
but at least it's small enough to prevent address space issues with
the cpu_entry_area map, which have been observed and debugged with
the fixmap code
- A few TLB flush fixes in various places plus documentation which of
the TLB functions should be used for what.
- Rename the SYSENTER stack to CPU_ENTRY_AREA stack as it is used for
more than sysenter now and keeping the name makes backtraces
confusing.
- Prevent LDT inheritance on exec() by moving it to arch_dup_mmap(),
which is only invoked on fork().
- Make vysycall more robust.
- A few fixes and cleanups of the debug_pagetables code. Check
PAGE_PRESENT instead of checking the PTE for 0 and a cleanup of the
C89 initialization of the address hint array which already was out
of sync with the index enums.
- Move the ESPFIX init to a different place to prepare for PTI.
- Several code moves with no functional change to make PTI
integration simpler and header files less convoluted.
- Documentation fixes and clarifications"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
x86/cpu_entry_area: Prevent wraparound in setup_cpu_entry_area_ptes() on 32bit
init: Invoke init_espfix_bsp() from mm_init()
x86/cpu_entry_area: Move it out of the fixmap
x86/cpu_entry_area: Move it to a separate unit
x86/mm: Create asm/invpcid.h
x86/mm: Put MMU to hardware ASID translation in one place
x86/mm: Remove hard-coded ASID limit checks
x86/mm: Move the CR3 construction functions to tlbflush.h
x86/mm: Add comments to clarify which TLB-flush functions are supposed to flush what
x86/mm: Remove superfluous barriers
x86/mm: Use __flush_tlb_one() for kernel memory
x86/microcode: Dont abuse the TLB-flush interface
x86/uv: Use the right TLB-flush API
x86/entry: Rename SYSENTER_stack to CPU_ENTRY_AREA_entry_stack
x86/doc: Remove obvious weirdnesses from the x86 MM layout documentation
x86/mm/64: Improve the memory map documentation
x86/ldt: Prevent LDT inheritance on exec
x86/ldt: Rework locking
arch, mm: Allow arch_dup_mmap() to fail
x86/vsyscall/64: Warn and fail vsyscall emulation in NATIVE mode
...
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| .. | ||
| .gitignore | ||
| 5lvl.c | ||
| check_cc.sh | ||
| check_initial_reg_state.c | ||
| entry_from_vm86.c | ||
| fsgsbase.c | ||
| ioperm.c | ||
| iopl.c | ||
| ldt_gdt.c | ||
| Makefile | ||
| mpx-debug.h | ||
| mpx-dig.c | ||
| mpx-hw.h | ||
| mpx-mini-test.c | ||
| mpx-mm.h | ||
| pkey-helpers.h | ||
| protection_keys.c | ||
| ptrace_syscall.c | ||
| raw_syscall_helper_32.S | ||
| sigreturn.c | ||
| single_step_syscall.c | ||
| syscall_arg_fault.c | ||
| syscall_nt.c | ||
| sysret_rip.c | ||
| sysret_ss_attrs.c | ||
| test_FCMOV.c | ||
| test_FCOMI.c | ||
| test_FISTTP.c | ||
| test_mremap_vdso.c | ||
| test_syscall_vdso.c | ||
| test_vdso.c | ||
| thunks_32.S | ||
| thunks.S | ||
| trivial_32bit_program.c | ||
| trivial_64bit_program.c | ||
| unwind_vdso.c | ||
| vdso_restorer.c | ||