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Chintan Pandya 29f475cbff ioremap: Update pgtable free interfaces with addr 
commit 785a19f9d1 upstream.

The following kernel panic was observed on ARM64 platform due to a stale
TLB entry.

 1. ioremap with 4K size, a valid pte page table is set.
 2. iounmap it, its pte entry is set to 0.
 3. ioremap the same address with 2M size, update its pmd entry with
    a new value.
 4. CPU may hit an exception because the old pmd entry is still in TLB,
    which leads to a kernel panic.

Commit b6bdb7517c ("mm/vmalloc: add interfaces to free unmapped page
table") has addressed this panic by falling to pte mappings in the above
case on ARM64.

To support pmd mappings in all cases, TLB purge needs to be performed
in this case on ARM64.

Add a new arg, 'addr', to pud_free_pmd_page() and pmd_free_pte_page()
so that TLB purge can be added later in seprate patches.

[toshi.kani@hpe.com: merge changes, rewrite patch description]
Fixes: 28ee90fe60 ("x86/mm: implement free pmd/pte page interfaces")
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: mhocko@suse.com
Cc: akpm@linux-foundation.org
Cc: hpa@zytor.com
Cc: linux-mm@kvack.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: stable@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20180627141348.21777-3-toshi.kani@hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-17 20:56:45 +02:00
..
bitops
bitops: Do not default to __clear_bit() for __clear_bit_unlock()
2016-04-12 09:09:00 -07:00
4level-fixup.h
…
asm-offsets.h
…
asm-prototypes.h
x86/kbuild: enable modversions for symbols exported from asm
2018-01-23 19:50:11 +01:00
atomic64.h
…
atomic-long.h
atomic: remove all traces of READ_ONCE_CTRL() and atomic*_read_ctrl()
2015-11-03 17:22:17 -08:00
atomic.h
atomic, arch: Audit atomic_{read,set}()
2015-09-23 09:54:28 +02:00
audit_change_attr.h
…
audit_dir_write.h
…
audit_read.h
…
audit_signal.h
…
audit_write.h
…
barrier.h
locking, arch: use WRITE_ONCE()/READ_ONCE() in smp_store_release()/smp_load_acquire()
2015-08-03 10:59:30 +02:00
bitops.h
…
bitsperlong.h
…
bug.h
…
bugs.h
…
cache.h
…
cacheflush.h
…
checksum.h
…
clkdev.h
…
cmpxchg-local.h
…
cmpxchg.h
asm-generic: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations
2015-10-15 00:21:13 +02:00
cputime_jiffies.h
…
cputime_nsecs.h
cputime: Prevent 32bit overflow in time[val|spec]_to_cputime()
2016-03-03 15:07:16 -08:00
cputime.h
…
current.h
…
delay.h
…
device.h
…
div64.h
…
dma-coherent.h
…
dma-contiguous.h
…
dma-mapping-broken.h
…
dma-mapping-common.h
dma-mapping: consolidate dma_set_mask
2015-09-10 13:29:01 -07:00
dma.h
…
early_ioremap.h
Merge branch 'akpm' (patches from Andrew)
2015-09-08 17:52:23 -07:00
emergency-restart.h
…
exec.h
…
export.h
EXPORT_SYMBOL() for asm
2018-01-23 19:50:12 +01:00
fb.h
…
fixmap.h
mm: provide early_memremap_ro to establish read-only mapping
2015-08-20 12:24:22 +01:00
ftrace.h
…
futex.h
futex: Remove duplicated code and fix undefined behaviour
2018-05-26 08:48:50 +02:00
getorder.h
…
gpio.h
…
hardirq.h
…
hugetlb.h
…
hw_irq.h
…
ide_iops.h
…
int-ll64.h
…
io-64-nonatomic-hi-lo.h
asm-generic: temporarily add back asm-generic/io-64-nonatomic*.h
2015-10-16 12:08:53 +02:00
io-64-nonatomic-lo-hi.h
asm-generic: temporarily add back asm-generic/io-64-nonatomic*.h
2015-10-16 12:08:53 +02:00
io.h
…
ioctl.h
…
iomap.h
…
irq_regs.h
…
irq_work.h
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irq.h
…
irqflags.h
…
Kbuild.asm
…
kdebug.h
…
kmap_types.h
…
kvm_para.h
…
libata-portmap.h
…
linkage.h
…
local64.h
…
local.h
…
mcs_spinlock.h
…
memory_model.h
mm: add PHYS_PFN, use it in __phys_to_pfn()
2017-11-21 09:21:22 +01:00
mm_hooks.h
…
mm-arch-hooks.h
…
mmu_context.h
…
mmu.h
…
module.h
…
msi.h
…
mutex-dec.h
locking/mutex: Use acquire/release semantics
2015-10-06 17:28:20 +02:00
mutex-null.h
…
mutex-xchg.h
locking/mutex: Use acquire/release semantics
2015-10-06 17:28:20 +02:00
mutex.h
…
page.h
…
param.h
…
parport.h
…
pci_iomap.h
PCI: Add pci_iomap_wc() variants
2015-08-25 09:59:45 +02:00
pci-bridge.h
…
pci-dma-compat.h
pci: remove pci_dma_supported
2015-11-10 16:32:11 -08:00
pci.h
…
percpu.h
percpu: make this_cpu_generic_read() atomic w.r.t. interrupts
2017-10-21 17:09:01 +02:00
pgalloc.h
…
pgtable-nopmd.h
…
pgtable-nopud.h
…
pgtable.h
ioremap: Update pgtable free interfaces with addr
2018-08-17 20:56:45 +02:00
preempt.h
sched/core: Create preempt_count invariant
2015-10-06 17:08:14 +02:00
ptrace.h
…
qrwlock_types.h
locking/qrwlock: Rename ->lock to ->wait_lock
2015-09-18 09:27:29 +02:00
qrwlock.h
locking/qrwlock: Make use of _{acquire|release|relaxed}() atomics
2015-08-12 11:59:06 +02:00
qspinlock_types.h
…
qspinlock.h
locking/qspinlock: Fix spin_unlock_wait() some more
2016-07-27 09:47:29 -07:00
resource.h
…
rtc.h
rtc: cmos: century support
2015-09-05 13:19:09 +02:00
rwsem.h
locking/rwsem: Use acquire/release semantics
2015-10-06 17:28:24 +02:00
seccomp.h
…
sections.h
…
segment.h
…
serial.h
…
siginfo.h
SIGNAL: Move generic copy_siginfo() to signal.h
2016-06-01 12:15:54 -07:00
signal.h
…
simd.h
…
sizes.h
…
spinlock.h
…
statfs.h
…
string.h
…
switch_to.h
…
syscall.h
…
syscalls.h
…
termios-base.h
…
termios.h
…
timex.h
…
tlb.h
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
tlbflush.h
…
topology.h
cpumask: fix spurious cpumask_of_node() on non-NUMA multi-node configs
2017-09-07 08:34:09 +02:00
trace_clock.h
…
uaccess-unaligned.h
…
uaccess.h
asm-generic: make copy_from_user() zero the destination properly
2016-09-24 10:07:45 +02:00
unaligned.h
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unistd.h
…
user.h
…
vga.h
…
vmlinux.lds.h
kaiser: cleanups while trying for gold link
2018-01-05 15:44:24 +01:00
vtime.h
…
word-at-a-time.h
…
xor.h
…