Chintan Pandya
6e6b637779
ioremap: Update pgtable free interfaces with addr ...
commit 785a19f9d1dd8a4ab2d0633be4656653bd3de1fc 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 b6bdb7517c3d ("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: 28ee90fe6048 ("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: Do not default to __clear_bit() for __clear_bit_unlock()
2016-03-21 10:50:48 +01:00
mm, asm-generic: define PUD_SHIFT in <asm-generic/4level-fixup.h>
2015-02-11 17:06:03 -08:00
asm-generic: Add common asm-offsets.h
2015-06-23 13:35:49 +09:00
asm-prototypes: Clear any CPP defines before declaring the functions
2017-01-12 11:39:07 +01:00
locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API
2016-07-07 09:16:20 +02:00
locking/atomic: Remove linux/atomic.h:atomic_fetch_or()
2016-06-16 10:48:32 +02:00
locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
2016-06-16 10:48:32 +02:00
audit: Modify a set of system calls in audit class definitions
2014-01-17 17:01:46 -05:00
audit: support the "standard" <asm-generic/unistd.h>
2011-05-04 14:41:28 -04:00
audit: support the "standard" <asm-generic/unistd.h>
2011-05-04 14:41:28 -04:00
audit: Modify a set of system calls in audit class definitions
2014-01-17 17:01:46 -05:00
locking/spinlock, arch: Update and fix spin_unlock_wait() implementations
2016-06-14 11:55:15 +02:00
arch: Prepare for smp_mb__{before,after}_atomic()
2014-04-18 11:40:30 +02:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
asm-generic changes for 4.6
2016-03-24 23:13:48 -07:00
asm-generic/cacheflush.h: flush icache when copying to user pages
2011-05-25 08:39:37 -07:00
ipv4: Update parameters for csum_tcpudp_magic to their original types
2016-03-13 23:55:13 -04:00
asm-generic: COMMON_CLK defines __clk_{get,put}
2014-09-25 18:00:45 -07:00
LLVMLinux: Remove warning about returning an uninitialized variable
2014-04-09 13:44:35 -07:00
asm-generic: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations
2015-10-15 00:21:13 +02:00
cputime: Generic on-demand virtual cputime accounting
2013-01-27 19:23:27 +01:00
sched, time: Fix build error with 64 bit cputime_t on 32 bit systems
2014-10-03 05:46:55 +02:00
sched/cputime: Count actually elapsed irq & softirq time
2016-07-14 10:42:34 +02:00
asm-generic: delay.h fix udelay and ndelay for 8 bit args
2011-07-22 18:45:33 +02:00
__div64_32(): make it overridable at compile time
2015-11-16 14:42:12 -05:00
asm-generic: Add dma-contiguous.h
2014-09-22 13:35:51 +02:00
Merge branch 'akpm' (patches from Andrew)
2015-09-08 17:52:23 -07:00
Split arch_align_stack() out from asm-generic/system.h
2012-03-28 18:30:03 +01:00
Revert "default exported asm symbols to zero"
2016-12-07 08:39:00 -08:00
asm-generic: Fix local variable shadow in __set_fixmap_offset
2016-02-16 15:10:44 +00:00
asm-generic headers: add ftrace.h
2011-03-17 09:19:04 +08:00
futex: Remove duplicated code and fix undefined behaviour
2018-05-19 10:27:00 +02:00
bitops: Add missing parentheses to new get_order macro
2012-02-24 10:39:27 -08:00
gpio: allow setting ARCH_NR_GPIOS from Kconfig
2016-02-19 00:22:54 +01:00
mm: Fix generic hugetlb pte check return type.
2013-10-02 20:02:35 -04:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
include/asm-generic/ioctl.h: fix _IOC_TYPECHECK sparse error
2014-06-06 16:08:13 -07:00
asm-generic/io.h: add io{read,write}64 accessors
2016-05-31 16:41:50 +08:00
irq_work: Introduce arch_irq_work_has_interrupt()
2014-09-13 18:38:07 +02:00
UAPI: Set up uapi/asm/Kbuild.asm
2012-10-02 18:01:56 +01:00
asm-generic: remove km_type definitions
2012-07-24 15:27:30 +08:00
KVM: add kvm_para_available to asm-generic/kvm_para.h
2013-06-05 13:21:29 +03:00
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
locking/mcs: Allow architecture specific asm files to be used for contended case
2014-02-09 21:18:52 +01:00
mm: add PHYS_PFN, use it in __phys_to_pfn()
2016-01-14 16:00:49 -08:00
mm: clean up per architecture MM hook header files
2015-07-17 16:39:53 -07:00
mm/core, x86/mm/pkeys: Differentiate instruction fetches
2016-02-18 19:46:29 +01:00
asm-generic/mmu.h: Add support for FDPIC
2012-12-09 23:14:14 +01:00
asm-generic: Remove asm-generic arch_bprm_mm_init()
2014-11-22 21:52:08 +01:00
Make most arch asm/module.h files use asm-generic/module.h
2012-09-28 14:31:03 +09:30
asm-generic: Add msi.h
2014-11-23 13:01:47 +01:00
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not
2013-06-26 12:10:55 +02:00
locking/mutex: Optimize mutex_trylock() fast-path
2016-06-08 15:17:01 +02:00
asm-generic: page.h: Remove useless get_user_page and free_user_page
2016-02-26 15:24:55 +01:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
include: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
PCI: Remove unused pcibios_select_root() (again)
2015-06-08 07:56:21 -05:00
PCI: Add pci_iomap_wc() variants
2015-08-25 09:59:45 +02:00
percpu: make this_cpu_generic_read() atomic w.r.t. interrupts
2017-10-12 11:51:23 +02:00
ioremap: Update pgtable free interfaces with addr
2018-08-17 20:59:29 +02:00
sched/preempt: Fix preempt_count manipulations
2016-05-17 12:24:21 +02:00
asm-generic/ptrace.h: start a common low level ptrace helper
2011-05-26 17:12:36 -07:00
locking/qrwlock: Fix write unlock bug on big endian systems
2016-08-10 14:13:27 +02:00
locking/qrwlock: Rename ->lock to ->wait_lock
2015-09-18 09:27:29 +02:00
locking/qspinlock: Use atomic_sub_return_release() in queued_spin_unlock()
2016-06-08 15:17:01 +02:00
locking/qspinlock: Move __ARCH_SPIN_LOCK_UNLOCKED to qspinlock_types.h
2016-02-29 10:02:43 +01:00
asm-generic: remove _STK_LIM_MAX
2014-05-15 00:32:09 +01:00
locking/rwsem: Remove rwsem_atomic_add() and rwsem_atomic_update()
2016-06-08 15:16:59 +02:00
seccomp: Get compat syscalls from asm-generic header
2016-05-13 14:02:00 +02:00
mm: kmemleak: scan .data.ro_after_init
2016-11-11 08:12:37 -08:00
SIGNAL: Move generic copy_siginfo() to signal.h
2016-05-13 14:02:10 +02:00
unify default ptrace_signal_deliver
2012-11-29 00:01:23 -05:00
crypto: create generic version of ablk_helper
2013-09-24 06:02:24 +10:00
ARM: 7430/1: sizes.h: move from asm-generic to <linux/sizes.h>
2012-06-28 17:14:34 +01:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
Split the switch_to() wrapper out of asm-generic/system.h
2012-03-28 18:30:03 +01:00
syscall.h: fix doc text for syscall_get_arch()
2014-09-23 16:20:00 -04:00
burying unused conditionals
2013-02-14 09:21:15 -05:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
mm/mmu_gather: track page size with mmu gather and force flush if page size change
2016-07-26 16:19:19 -07:00
BUG: headers with BUG/BUG_ON etc. need linux/bug.h
2012-03-04 17:54:34 -05:00
cpumask: fix spurious cpumask_of_node() on non-NUMA multi-node configs
2017-09-07 08:35:40 +02:00
tracing,x86: Add a TSC trace_clock
2012-11-13 15:48:27 -05:00
exceptions: detritus removal
2016-09-27 21:15:14 -04:00
asm-generic: allow generic unaligned access if the arch supports it
2014-05-08 10:22:23 +02:00
We get rid of the general module prefix confusion with a binary config option,
2013-05-05 10:58:06 -07:00
earlycon: Use a pointer table to fix __earlycon_table stride
2018-05-01 15:13:09 -07:00
include/asm-generic/vtime.h: avoid zero-length file
2013-09-30 14:31:02 -07:00
Make asm/word-at-a-time.h available on all architectures
2015-07-08 16:41:55 -04:00
asm-generic: xor: mark static functions as __maybe_unused
2012-10-03 21:21:06 +02:00
6e6b637779