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Chintan Pandya 6e6b637779 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 20:59:29 +02:00
..
bitops
bitops: Do not default to __clear_bit() for __clear_bit_unlock()
2016-03-21 10:50:48 +01:00
4level-fixup.h
…
asm-offsets.h
…
asm-prototypes.h
asm-prototypes: Clear any CPP defines before declaring the functions
2017-01-12 11:39:07 +01:00
atomic64.h
locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
2016-06-16 10:48:32 +02:00
atomic-long.h
locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API
2016-07-07 09:16:20 +02:00
atomic.h
locking/atomic: Remove linux/atomic.h:atomic_fetch_or()
2016-06-16 10:48:32 +02:00
audit_change_attr.h
…
audit_dir_write.h
…
audit_read.h
…
audit_signal.h
…
audit_write.h
…
barrier.h
locking/spinlock, arch: Update and fix spin_unlock_wait() implementations
2016-06-14 11:55:15 +02:00
bitops.h
…
bitsperlong.h
…
bug.h
Merge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
2016-03-24 23:13:48 -07:00
bugs.h
…
cache.h
…
cacheflush.h
…
checksum.h
…
clkdev.h
…
cmpxchg-local.h
…
cmpxchg.h
…
cputime_jiffies.h
…
cputime_nsecs.h
sched/cputime: Count actually elapsed irq & softirq time
2016-07-14 10:42:34 +02:00
cputime.h
…
current.h
…
delay.h
…
device.h
…
div64.h
…
dma-contiguous.h
…
dma.h
…
early_ioremap.h
…
emergency-restart.h
…
exec.h
…
export.h
Revert "default exported asm symbols to zero"
2016-12-07 08:39:00 -08:00
fb.h
…
fixmap.h
…
ftrace.h
…
futex.h
futex: Remove duplicated code and fix undefined behaviour
2018-05-19 10:27:00 +02:00
getorder.h
…
gpio.h
…
hardirq.h
…
hugetlb.h
…
hw_irq.h
…
ide_iops.h
…
int-ll64.h
…
io.h
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
ioctl.h
…
iomap.h
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
irq_regs.h
…
irq_work.h
…
irq.h
…
irqflags.h
…
Kbuild.asm
…
kdebug.h
…
kmap_types.h
…
kvm_para.h
…
linkage.h
…
local64.h
…
local.h
…
mcs_spinlock.h
…
memory_model.h
…
mm_hooks.h
…
mm-arch-hooks.h
…
mmu_context.h
…
mmu.h
…
module.h
…
msi.h
…
mutex-dec.h
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
mutex-null.h
…
mutex-xchg.h
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
mutex.h
…
page.h
…
param.h
…
parport.h
…
pci_iomap.h
…
pci.h
…
percpu.h
percpu: make this_cpu_generic_read() atomic w.r.t. interrupts
2017-10-12 11:51:23 +02:00
pgalloc.h
…
pgtable-nopmd.h
…
pgtable-nopud.h
…
pgtable.h
ioremap: Update pgtable free interfaces with addr
2018-08-17 20:59:29 +02:00
preempt.h
sched/preempt: Fix preempt_count manipulations
2016-05-17 12:24:21 +02:00
ptrace.h
…
qrwlock_types.h
…
qrwlock.h
locking/qrwlock: Fix write unlock bug on big endian systems
2016-08-10 14:13:27 +02:00
qspinlock_types.h
…
qspinlock.h
locking/qspinlock: Use atomic_sub_return_release() in queued_spin_unlock()
2016-06-08 15:17:01 +02:00
resource.h
…
rwsem.h
locking/rwsem: Remove rwsem_atomic_add() and rwsem_atomic_update()
2016-06-08 15:16:59 +02:00
seccomp.h
seccomp: Get compat syscalls from asm-generic header
2016-05-13 14:02:00 +02:00
sections.h
mm: kmemleak: scan .data.ro_after_init
2016-11-11 08:12:37 -08:00
segment.h
…
serial.h
…
siginfo.h
SIGNAL: Move generic copy_siginfo() to signal.h
2016-05-13 14:02:10 +02:00
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
mm/mmu_gather: track page size with mmu gather and force flush if page size change
2016-07-26 16:19:19 -07:00
tlbflush.h
…
topology.h
cpumask: fix spurious cpumask_of_node() on non-NUMA multi-node configs
2017-09-07 08:35:40 +02:00
trace_clock.h
…
uaccess-unaligned.h
…
uaccess.h
exceptions: detritus removal
2016-09-27 21:15:14 -04:00
unaligned.h
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unistd.h
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user.h
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vga.h
…
vmlinux.lds.h
earlycon: Use a pointer table to fix __earlycon_table stride
2018-05-01 15:13:09 -07:00
vtime.h
…
word-at-a-time.h
…
xor.h
…