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Anshuman Khandual 53fa117bb3 arm64/mm: Enable THP migration 
In certain page migration situations, a THP page can be migrated without
being split into it's constituent subpages. This saves time required to
split a THP and put it back together when required. But it also saves an
wider address range translation covered by a single TLB entry, reducing
future page fault costs.

A previous patch changed platform THP helpers per generic memory semantics,
clearing the path for THP migration support. This adds two more THP helpers
required to create PMD migration swap entries. Now enable THP migration via
ARCH_ENABLE_THP_MIGRATION.

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki Poulose <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/1599627183-14453-3-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
2020-09-11 14:57:30 +01:00
..
vdso
vdso/treewide: Add vdso_data pointer argument to __arch_get_hw_counter()
2020-08-06 10:57:30 +02:00
xen
xen: fixes and cleanups for 5.4-rc2
2019-10-04 11:13:09 -07:00
acenv.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
acpi.h
arm64/acpi: disallow AML memory opregions to access kernel memory
2020-07-14 18:02:03 +01:00
alternative.h
arm64/alternatives: move length validation inside the subsection
2020-07-30 16:50:14 +01:00
arch_gicv3.h
KVM: arm64: Annotate hyp NMI-related functions as __always_inline
2020-06-22 14:39:45 +01:00
arch_timer.h
arm64: arch_timer: Allow an workaround descriptor to disable compat vdso
2020-07-08 21:57:51 +01:00
archrandom.h
random: random.h should include archrandom.h, not the other way around
2020-08-05 12:39:48 -07:00
arm_dsu_pmu.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
arm-cci.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
asm_pointer_auth.h
arm64: simplify ptrauth initialization
2020-04-28 11:23:21 +01:00
asm-bug.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
asm-offsets.h
…
asm-prototypes.h
arm64: asm-prototypes: Fix fat-fingered typo in comment
2019-01-10 11:11:46 +00:00
asm-uaccess.h
arm64 updates for 5.5:
2019-11-25 15:39:19 -08:00
assembler.h
arm64: asm: Provide a mechanism for generating ELF note for BTI
2020-05-07 17:53:20 +01:00
atomic_ll_sc.h
arm64: Move the LSE gas support detection to Kconfig
2020-01-15 12:50:48 +00:00
atomic_lse.h
arm64: lse: fix LSE atomics with LLVM's integrated assembler
2020-01-16 17:25:10 +00:00
atomic.h
locking/atomic: Move ATOMIC_INIT into linux/types.h
2020-07-29 16:14:18 +02:00
barrier.h
arm64: barrier: Use '__unqual_scalar_typeof' for acquire/release macros
2020-04-16 12:28:35 +01:00
bitops.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
bitrev.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
boot.h
treewide: replace #include <asm/sizes.h> with #include <linux/sizes.h>
2019-05-14 19:52:52 -07:00
brk-imm.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
bug.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
cache.h
arm64: Ask the compiler to __always_inline functions used by KVM at HYP
2020-02-22 11:01:47 +00:00
cacheflush.h
arm64: use asm-generic/cacheflush.h
2020-06-08 11:05:57 -07:00
checksum.h
arm64: csum: Fix handling of bad packets
2020-07-30 17:01:38 +01:00
clocksource.h
arm64: Introduce asm/vdso/clocksource.h
2020-03-21 15:23:55 +01:00
cmpxchg.h
arm64: fix unreachable code issue with cmpxchg
2019-09-17 12:11:50 +01:00
compat.h
compat: provide compat_ptr() on all architectures
2020-01-03 09:32:51 +01:00
compiler.h
arm64: use a common .arch preamble for inline assembly
2020-08-28 11:15:15 +01:00
cpu_ops.h
arm64: Introduce get_cpu_ops() helper function
2020-03-24 17:24:19 +00:00
cpu.h
arm64/cpuinfo: Add ID_MMFR4_EL1 into the cpuinfo_arm64 context
2020-05-21 15:47:12 +01:00
cpucaps.h
arm64: tlb: Detect the ARMv8.4 TLBI RANGE feature
2020-07-15 15:57:30 +01:00
cpufeature.h
arm64 and cross-arch updates for 5.9:
2020-08-03 14:11:08 -07:00
cpuidle.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cputype.h
arm64: Add MIDR value for KRYO4XX gold CPU cores
2020-07-03 16:39:16 +01:00
current.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
daifflags.h
arm64: acpi: fix DAIF manipulation with pNMI
2020-01-22 14:41:22 +00:00
dcc.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284
2019-06-05 17:36:37 +02:00
debug-monitors.h
arm64: ptrace: Override SPSR.SS when single-stepping is enabled
2020-07-16 11:41:21 +01:00
device.h
arm64: Remove dev->archdata.iommu pointer
2020-06-30 11:59:49 +02:00
dmi.h
…
efi.h
efi/libstub: unify EFI call wrappers for non-x86
2020-04-23 20:15:06 +02:00
elf.h
Split the old READ_IMPLIES_EXEC workaround from executable PT_GNU_STACK
2020-06-05 13:45:21 -07:00
esr.h
Merge branch 'for-next/bti-user' into for-next/bti
2020-05-05 15:15:58 +01:00
exception.h
arm64: Basic Branch Target Identification support
2020-03-16 17:19:48 +00:00
exec.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
extable.h
bpf, arm64: Add BPF exception tables
2020-07-31 00:43:40 +02:00
fb.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
fixmap.h
arm64/fixmap: make notes of fixed_addresses more precisely
2020-08-08 19:25:04 +01:00
fpsimd.h
arm64: remove pointless __KERNEL__ guards
2019-08-05 11:06:33 +01:00
fpsimdmacros.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
ftrace.h
arm64: implement ftrace with regs
2019-11-06 14:17:35 +00:00
futex.h
futex: arch_futex_atomic_op_inuser() calling conventions change
2020-03-27 23:58:51 -04:00
hardirq.h
arm64: Prepare arch_nmi_enter() for recursion
2020-05-19 15:51:17 +02:00
hugetlb.h
arm64/hugetlb: Reserve CMA areas for gigantic pages on 16K and 64K configs
2020-07-15 13:38:03 +01:00
hw_breakpoint.h
arm64: remove pointless __KERNEL__ guards
2019-08-05 11:06:33 +01:00
hwcap.h
arm64: Reserve HWCAP2_MTE as (1 << 18)
2020-07-24 11:55:29 +01:00
hypervisor.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
image.h
docs: arm64: convert docs to ReST and rename to .rst
2019-06-14 14:20:27 -06:00
insn.h
arm64: insn: Provide a better name for aarch64_insn_is_nop()
2020-05-04 16:06:29 +01:00
io.h
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
irq_work.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq.h
arm64: Use the new GENERIC_IRQ_MULTI_HANDLER
2018-08-03 12:14:09 +02:00
irqflags.h
arm64: Implement arch_irqs_disabled()
2020-08-26 12:41:55 +02:00
jump_label.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
kasan.h
arm64: mm: Introduce vabits_actual
2019-08-09 11:17:21 +01:00
Kbuild
KVM: arm64: Use common KVM implementation of MMU memory caches
2020-07-09 13:29:43 -04:00
kernel-pgtable.h
arm64: Reduce the number of header files pulled into vmlinux.lds.S
2020-07-21 10:50:37 +01:00
kexec.h
Revert "arm64: kexec: make dtb_mem always enabled"
2020-01-10 16:00:50 +00:00
kgdb.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
kprobes.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
kvm_arm.h
KVM: arm64: Set HCR_EL2.PTW to prevent AT taking synchronous exception
2020-08-28 15:27:47 +01:00
kvm_asm.h
KVM: arm64: Survive synchronous exceptions caused by AT instructions
2020-08-28 15:23:46 +01:00
kvm_coproc.h
KVM/arm64 updates for Linux 5.9:
2020-08-09 12:58:23 -04:00
kvm_emulate.h
Merge branch 'kvm-arm64/misc-5.9' into kvmarm-master/next
2020-07-30 16:13:04 +01:00
kvm_host.h
KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
2020-08-21 18:03:47 -04:00
kvm_hyp.h
KVM: arm64: Remove __hyp_text macro, use build rules instead
2020-07-05 18:38:45 +01:00
kvm_mmu.h
KVM/arm64 updates for Linux 5.9:
2020-08-09 12:58:23 -04:00
kvm_ptrauth.h
KVM: arm64: Simplify PtrAuth alternative patching
2020-06-22 11:42:50 +01:00
kvm_ras.h
arm64: KVM/mm: Move SEA handling behind a single 'claim' interface
2019-02-07 23:10:45 +01:00
kvm_types.h
KVM: arm64: Use common KVM implementation of MMU memory caches
2020-07-09 13:29:43 -04:00
linkage.h
arm64: Don't insert a BTI instruction at inner labels
2020-06-24 14:24:29 +01:00
lse.h
arm64: lse: Fix LSE atomics with LLVM
2020-02-18 18:10:49 +00:00
memory.h
Merge branch 'for-next/read-barrier-depends' into for-next/core
2020-07-31 18:09:57 +01:00
mman.h
arm64: Basic Branch Target Identification support
2020-03-16 17:19:48 +00:00
mmu_context.h
arm64/mm: save memory access in check_and_switch_context() fast switch path
2020-07-30 12:58:40 +01:00
mmu.h
KVM: arm64: Substitute RANDOMIZE_BASE for HARDEN_EL2_VECTORS
2020-07-28 10:41:11 +01:00
mmzone.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.h
arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>
2020-04-23 10:50:26 +09:00
neon-intrinsics.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
neon.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
numa.h
arm64: numa: separate out updates to percpu nodeid and NUMA node cpumap
2018-07-06 13:18:18 +01:00
page-def.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
page.h
mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS
2020-04-10 15:36:21 -07:00
paravirt.h
arm64: Retrieve stolen time as paravirtualized guest
2019-10-21 19:20:31 +01:00
pci.h
arm64: remove pointless __KERNEL__ guards
2019-08-05 11:06:33 +01:00
percpu.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
perf_event.h
arm64: perf: Expose some new events via sysfs
2020-07-21 12:59:42 +01:00
pgalloc.h
asm-generic: pgalloc: provide generic pgd_free()
2020-08-07 11:33:26 -07:00
pgtable-hwdef.h
Merge branch 'for-next/tlbi' into for-next/core
2020-07-31 18:09:50 +01:00
pgtable-prot.h
arm64/mm: Change THP helpers to comply with generic MM semantics
2020-09-11 14:57:30 +01:00
pgtable-types.h
arm64: add support for folded p4d page tables
2020-06-04 19:06:21 -07:00
pgtable.h
arm64/mm: Enable THP migration
2020-09-11 14:57:30 +01:00
pointer_auth.h
arm64: sync kernel APIAKey when installing
2020-04-21 15:52:56 +01:00
preempt.h
sched/rt, arm64: Use CONFIG_PREEMPTION
2019-12-08 14:37:32 +01:00
probes.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
proc-fns.h
arm64: mm: convert cpu_do_switch_mm() to C
2020-02-27 14:30:50 +00:00
processor.h
arm64 updates for 5.7:
2020-03-31 10:05:01 -07:00
ptdump.h
arm64: mm: convert mm/dump.c to use walk_page_range()
2020-02-04 03:05:25 +00:00
ptrace.h
arm64: ptrace.h: delete duplicated word
2020-07-30 12:54:56 +01:00
pvclock-abi.h
KVM: arm64: Implement PV_TIME_FEATURES call
2019-10-21 19:20:27 +01:00
scs.h
scs: Move scs_overflow_check() out of architecture code
2020-05-18 17:47:40 +01:00
sdei.h
arm64: Use the correct style for SPDX License Identifier
2019-04-16 16:28:01 +01:00
seccomp.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
sections.h
arm64: Remove __exception_text_start and __exception_text_end from asm/section.h
2020-01-08 17:30:19 +00:00
shmparam.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
signal32.h
arm64: remove pointless __KERNEL__ guards
2019-08-05 11:06:33 +01:00
simd.h
arm64: fpsimd: Make sure SVE setup is complete before SIMD is used
2020-01-14 17:11:21 +00:00
smp_plat.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
smp.h
- Fix tegra194-cpufreq module build failure caused __cpu_logical_map
2020-08-08 14:16:12 -07:00
sparsemem.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
spinlock_types.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
spinlock.h
arm64/spinlock: fix a -Wunused-function warning
2020-02-10 11:29:24 +00:00
stack_pointer.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
stackprotector.h
arm64: initialize ptrauth keys for kernel booting task
2020-03-18 09:50:20 +00:00
stacktrace.h
arm64: add loglvl to dump_backtrace()
2020-06-09 09:39:11 -07:00
stage2_pgtable.h
arm64: Add level-hinted TLB invalidation helper
2020-07-07 09:27:15 +01:00
stat.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
string.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
suspend.h
arm64: Preserve register x18 when CPU is suspended
2020-05-15 16:35:50 +01:00
sync_bitops.h
arm64, locking/atomics: Use instrumented atomics
2018-11-01 11:01:40 +01:00
syscall_wrapper.h
arm64: simplify syscall wrapper ifdeffery
2019-10-14 10:55:00 +01:00
syscall.h
arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return
2020-07-16 11:41:31 +01:00
sysreg.h
Merge branch 'for-next/tlbi' into for-next/core
2020-07-31 18:09:50 +01:00
system_misc.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
thread_info.h
arm64: ptrace: Consistently use pseudo-singlestep exceptions
2020-07-16 11:41:07 +01:00
timex.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
tlb.h
arm64: tlb: Set the TTL field in flush_tlb_range
2020-07-07 11:23:47 +01:00
tlbflush.h
arm64: use a common .arch preamble for inline assembly
2020-08-28 11:15:15 +01:00
topology.h
arch_topology, sched/core: Cleanup thermal pressure definition
2020-07-22 10:22:05 +02:00
traps.h
arm64: remove __exception annotations
2019-10-28 11:22:38 +00:00
uaccess.h
uaccess: remove segment_eq
2020-08-12 10:57:58 -07:00
unistd32.h
all arch: remove system call sys_sysctl
2020-08-14 19:56:56 -07:00
unistd.h
vfs: add faccessat2 syscall
2020-05-14 16:44:25 +02:00
uprobes.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
vdso.h
arm64/vdso: Add time namespace page
2020-07-24 13:15:20 +01:00
vermagic.h
arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h>
2020-04-23 10:50:26 +09:00
virt.h
KVM: arm64: Use build-time defines in has_vhe()
2020-07-05 18:38:01 +01:00
vmalloc.h
mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h>
2019-12-10 10:12:55 +01:00
vmap_stack.h
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
word-at-a-time.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
xor.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00