Joerg Roedel 61a6bd83ab Revert "x86/mm/legacy: Populate the user page-table with user pgd's" ... This reverts commit 1f40a46cf4. It turned out that this patch is not sufficient to enable PTI on 32 bit systems with legacy 2-level page-tables. In this paging mode the huge-page PTEs are in the top-level page-table directory, where also the mirroring to the user-space page-table happens. So every huge PTE exits twice, in the kernel and in the user page-table. That means that accessed/dirty bits need to be fetched from two PTEs in this mode to be safe, but this is not trivial to implement because it needs changes to generic code just for the sake of enabling PTI with 32-bit legacy paging. As all systems that need PTI should support PAE anyway, remove support for PTI when 32-bit legacy paging is used. Fixes: 7757d607c6 ('x86/pti: Allow CONFIG_PAGE_TABLE_ISOLATION for x86_32') Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: hpa@zytor.com Cc: linux-mm@kvack.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Andrea Arcangeli <aarcange@redhat.com> Link: https://lkml.kernel.org/r/1536922754-31379-1-git-send-email-joro@8bytes.org		2018-09-14 17:08:45 +02:00
..
crypto
e820
fpu
numachip
trace	Minor code cleanups for PPC.	2018-08-19 10:38:36 -07:00
uv
xen	xen: remove unused hypercall functions	2018-08-20 14:46:18 -04:00
a.out-core.h
acenv.h
acpi.h
agp.h
alternative-asm.h
alternative.h
amd_nb.h
apb_timer.h
apic.h	x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d	2018-08-05 09:53:13 +02:00
apic_flat_64.h
apicdef.h
apm.h	x86/apm: Don't access __preempt_count with zeroed fs	2018-07-16 17:59:57 +02:00
arch_hweight.h
archrandom.h
asm-offsets.h
asm-prototypes.h
asm.h	x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h>	2018-07-03 10:56:27 +02:00
atomic.h	x86: Fix kernel-doc atomic.h warnings	2018-09-03 12:41:41 +02:00
atomic64_32.h	x86: Fix kernel-doc atomic.h warnings	2018-09-03 12:41:41 +02:00
atomic64_64.h	x86: Fix kernel-doc atomic.h warnings	2018-09-03 12:41:41 +02:00
barrier.h	x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec()	2018-06-21 16:00:21 +02:00
bios_ebda.h
bitops.h
boot.h
bootparam_utils.h
bug.h
bugs.h
cache.h
cacheflush.h
cacheinfo.h
calgary.h
ce4100.h
checksum.h
checksum_32.h
checksum_64.h
clocksource.h
cmdline.h
cmpxchg.h	locking/atomics: Instrument xchg()	2018-07-25 11:53:59 +02:00
cmpxchg_32.h
cmpxchg_64.h	locking/atomics/x86: Reduce arch_cmpxchg64*() instrumentation	2018-07-25 11:53:58 +02:00
compat.h
cpu.h
cpu_device_id.h
cpu_entry_area.h
cpufeature.h
cpufeatures.h	Merge branch 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-08-14 09:46:06 -07:00
cpumask.h
crash.h
current.h
debugreg.h
delay.h
desc.h
desc_defs.h
device.h
disabled-features.h
div64.h
dma-direct.h
dma-mapping.h	x86/pci-dma: switch the VIA 32-bit DMA quirk to use the struct device flag	2018-05-28 12:48:25 +02:00
dma.h
dmi.h	x86: Don't include linux/irq.h from asm/hardirq.h	2018-08-05 09:53:13 +02:00
dwarf2.h
edac.h
efi.h
elf.h
emergency-restart.h
entry_arch.h
error-injection.h
espfix.h
exec.h
extable.h
fb.h
fixmap.h
floppy.h
frame.h
ftrace.h
futex.h
gart.h
genapic.h
geode.h
hardirq.h	x86: Don't include linux/irq.h from asm/hardirq.h	2018-08-05 09:53:13 +02:00
highmem.h
hpet.h
hugetlb.h
hw_breakpoint.h	perf/hw_breakpoint: Remove default hw_breakpoint_arch_parse()	2018-06-26 09:07:58 +02:00
hw_irq.h
hyperv-tlfs.h	Minor code cleanups for PPC.	2018-08-19 10:38:36 -07:00
hypervisor.h
i8259.h	x86: i8259: Add missing include file	2018-08-15 13:44:10 -07:00
ia32.h
ia32_unistd.h
imr.h
inat.h
inat_types.h
init.h
insn-eval.h
insn.h
inst.h
intel-family.h	x86/cpu: Introduce INTEL_CPU_FAM*() helper macros	2018-07-03 13:08:20 +02:00
intel-mid.h	x86/platform/intel-mid: Remove per platform code	2018-07-03 13:08:21 +02:00
intel_ds.h	perf/x86/intel/ds: Handle PEBS overflow for fixed counters	2018-07-25 11:50:50 +02:00
intel_mid_vrtc.h
intel_pconfig.h
intel_pmc_ipc.h
intel_pt.h
intel_punit_ipc.h
intel_rdt_sched.h
intel_scu_ipc.h
intel_telemetry.h
invpcid.h
io.h
io_apic.h
iomap.h
iommu.h
iommu_table.h
iosf_mbi.h
ipi.h
irq.h
irq_regs.h
irq_remapping.h	x86: irq_remapping: Move irq remapping mode enum	2018-07-06 14:43:47 +02:00
irq_vectors.h
irq_work.h
irqdomain.h
irqflags.h	x86/irqflags: Mark native_restore_fl extern inline	2018-08-30 11:37:09 +02:00
ist.h
jailhouse_para.h
jump_label.h
kasan.h
kaslr.h
kbdleds.h
Kbuild	module: use relative references for __ksymtab entries	2018-08-22 10:52:47 -07:00
kdebug.h	x86/process: Don't mix user/kernel regs in 64bit __show_regs()	2018-09-06 14:33:12 +02:00
kexec-bzimage64.h
kexec.h
kgdb.h
kmap_types.h
kprobes.h	kprobes/x86: Don't call the ->break_handler() in x86 kprobes	2018-06-21 12:33:13 +02:00
kvm_emulate.h	kvm: x86: use correct privilege level for sgdt/sidt/fxsave/fxrstor access	2018-06-12 15:06:34 +02:00
kvm_host.h	KVM: LAPIC: Fix pv ipis out-of-bounds access	2018-09-07 18:38:43 +02:00
kvm_page_track.h
kvm_para.h	x86/kvmclock: Decrapify kvm_register_clock()	2018-07-20 00:02:36 +02:00
kvmclock.h
linkage.h
livepatch.h
local.h
local64.h
mach_timer.h
mach_traps.h
math_emu.h
mc146818rtc.h
mce.h	x86/mce: Add notifier_block forward declaration	2018-08-20 18:04:42 +02:00
mcsafe_test.h
mem_encrypt.h
microcode.h
microcode_amd.h
microcode_intel.h
misc.h
mmconfig.h
mmu.h
mmu_context.h	x86/ldt: Enable LDT user-mapping for PAE	2018-07-20 01:11:48 +02:00
mmx.h
mmzone.h
mmzone_32.h
mmzone_64.h
module.h
mpspec.h
mpspec_def.h
mpx.h
mshyperv.h	Minor code cleanups for PPC.	2018-08-19 10:38:36 -07:00
msi.h
msidef.h
msr-index.h	x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry	2018-08-05 17:10:19 +02:00
msr-trace.h
msr.h
mtrr.h
mwait.h
nmi.h
nops.h
nospec-branch.h	x86/speculation: Support Enhanced IBRS on future CPUs	2018-08-03 12:50:34 +02:00
numa.h
numa_32.h
olpc.h
olpc_ofw.h
orc_lookup.h
orc_types.h	x86/unwind/orc: Detect the end of the stack	2018-06-21 16:34:56 +02:00
page.h
page_32.h
page_32_types.h	x86/speculation/l1tf: Increase 32bit PAE __PHYSICAL_PAGE_SHIFT	2018-06-20 19:09:59 +02:00
page_64.h
page_64_types.h
page_types.h	x86/mm: Decouple dynamic __PHYSICAL_MASK from AMD SME	2018-06-06 13:38:01 +02:00
paravirt.h	x86/mm: Only use tlb_remove_table() for paravirt	2018-08-23 11:56:31 -07:00
paravirt_types.h	x86/mm: Only use tlb_remove_table() for paravirt	2018-08-23 11:56:31 -07:00
parport.h
pat.h
pci-direct.h	PCI: Make early dump functionality generic	2018-06-29 20:06:07 -05:00
pci-functions.h
pci.h
pci_64.h
pci_x86.h
percpu.h	x86/asm: Use CC_SET/CC_OUT in percpu_cmpxchg8b_double() to micro-optimize code generation	2018-06-21 15:21:47 +02:00
perf_event.h
perf_event_p4.h
pgalloc.h	x86/mm: Don't free P4D table when it is folded at runtime	2018-06-26 09:21:48 +02:00
pgtable-2level.h	Revert "x86/mm/legacy: Populate the user page-table with user pgd's"	2018-09-14 17:08:45 +02:00
pgtable-2level_types.h	x86/pgtable: Move two more functions from pgtable_64.h to pgtable.h	2018-07-20 01:11:42 +02:00
pgtable-3level.h	x86/pae: use 64 bit atomic xchg function in native_ptep_get_and_clear	2018-08-27 14:20:49 -04:00
pgtable-3level_types.h	x86/pgtable: Move two more functions from pgtable_64.h to pgtable.h	2018-07-20 01:11:42 +02:00
pgtable-invert.h	x86/speculation/l1tf: Exempt zeroed PTEs from inversion	2018-08-17 10:27:36 -07:00
pgtable.h	x86/mm: Use WRITE_ONCE() when setting PTEs	2018-09-08 12:30:36 +02:00
pgtable_32.h	x86/pgtable: Move two more functions from pgtable_64.h to pgtable.h	2018-07-20 01:11:42 +02:00
pgtable_32_types.h	x86/ldt: Define LDT_END_ADDR	2018-07-20 01:11:47 +02:00
pgtable_64.h	x86/mm: Use WRITE_ONCE() when setting PTEs	2018-09-08 12:30:36 +02:00
pgtable_64_types.h	x86/ldt: Define LDT_END_ADDR	2018-07-20 01:11:47 +02:00
pgtable_types.h	x86/mm/pae: Populate valid user PGD entries	2018-07-20 01:11:42 +02:00
pkeys.h	powerpc updates for 4.18	2018-06-07 10:23:33 -07:00
platform_sst_audio.h
pm-trace.h
posix_types.h
preempt.h
probe_roms.h
processor-cyrix.h
processor-flags.h	x86/mm/pti: Define X86_CR3_PTI_PCID_USER_BIT on x86_32	2018-07-20 01:11:44 +02:00
processor.h	x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+	2018-08-27 10:29:14 +02:00
prom.h
proto.h
pti.h	x86/mm/pti: Introduce pti_finalize()	2018-07-20 01:11:45 +02:00
ptrace.h
purgatory.h
pvclock-abi.h
pvclock.h
qrwlock.h
qspinlock.h
qspinlock_paravirt.h	locking/pvqspinlock/x86: Use LOCK_PREFIX in __pv_queued_spin_unlock() assembly code	2018-07-25 11:22:20 +02:00
realmode.h
reboot.h
reboot_fixups.h
refcount.h	locking/refcounts: Include fewer headers in <linux/refcount.h>	2018-06-21 18:22:02 +02:00
required-features.h
rio.h
rmwcc.h
rwsem.h
seccomp.h
sections.h	x86/mm/pti: Make pti_clone_kernel_text() compile on 32 bit	2018-07-20 01:11:44 +02:00
segment.h	Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables	2018-06-14 12:21:18 +09:00
serial.h
set_memory.h	libnvdimm-for-4.19_dax-memory-failure	2018-08-25 18:43:59 -07:00
setup.h
setup_arch.h
shmparam.h
sigcontext.h
sigframe.h
sighandling.h
signal.h	x86/asm: Use CC_SET()/CC_OUT() in __gen_sigismember()	2018-08-30 13:02:31 +02:00
simd.h
smap.h
smp.h
sparsemem.h
spec-ctrl.h
special_insns.h
spinlock.h
spinlock_types.h
sta2x11.h
stackprotector.h	Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables	2018-06-14 12:21:18 +09:00
stacktrace.h	x86/dumpstack: Don't dump kernel memory based on usermode RIP	2018-08-31 17:08:22 +02:00
string.h
string_32.h
string_64.h
suspend.h
suspend_32.h
suspend_64.h
svm.h
swiotlb.h
switch_to.h	x86/entry: Rename update_sp0 to update_task_stack	2018-07-20 01:11:40 +02:00
sync_bitops.h
sync_core.h
syscall.h
syscall_wrapper.h
syscalls.h
sysfb.h
tce.h
text-patching.h	x86/alternatives, jumplabel: Use text_poke_early() before mm_init()	2018-07-20 00:02:38 +02:00
thread_info.h
time.h
timer.h
timex.h
tlb.h
tlbbatch.h
tlbflush.h	x86/nmi: Fix NMI uaccess race against CR3 switching	2018-08-31 17:08:22 +02:00
topology.h	x86/topology: Provide topology_smt_supported()	2018-06-21 14:20:57 +02:00
trace_clock.h
traps.h
tsc.h	x86/tsc: Make use of tsc_calibrate_cpu_early()	2018-07-20 00:02:44 +02:00
uaccess.h
uaccess_32.h
uaccess_64.h	x86/asm/memcpy_mcsafe: Fix copy_to_user_mcsafe() exception handling	2018-07-16 00:05:05 +02:00
umip.h
unaligned.h
unistd.h
unwind.h
unwind_hints.h	x86/unwind/orc: Detect the end of the stack	2018-06-21 16:34:56 +02:00
uprobes.h
user.h
user32.h
user_32.h
user_64.h
vdso.h
vga.h
vgtod.h	x86/vdso: Fix lsl operand order	2018-09-01 23:01:56 +02:00
virtext.h
vm86.h
vmx.h	KVM: vmx: Add defines for SGX ENCLS exiting	2018-08-22 16:48:35 +02:00
vsyscall.h
vvar.h
word-at-a-time.h
x86_init.h	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-10 09:44:53 -07:00
xor.h
xor_32.h
xor_64.h
xor_avx.h