of/fdt: add dt_phys arg to early_init_dt_scan and early_init_dt_verify

__pa() is only intended to be used for linear map addresses and using
it for initial_boot_params which is in fixmap for arm64

of/fdt: add dt_phys arg to early_init_dt_scan and early_init_dt_verify

__pa() is only intended to be used for linear map addresses and using
it for initial_boot_params which is in fixmap for arm64 will give an
incorrect value. Hence save the physical address when it is known at
boot time when calling early_init_dt_scan for arm64 and use it at kexec
time instead of converting the virtual address using __pa().

Note that arm64 doesn't need the FDT region reserved in the DT as the
kernel explicitly reserves the passed in FDT. Therefore, only a debug
warning is fixed with this change.

Reported-by: Breno Leitao <[email protected]>
Suggested-by: Mark Rutland <[email protected]>
Signed-off-by: Usama Arif <[email protected]>
Fixes: ac10be5cdbfa ("arm64: Use common of_kexec_alloc_and_setup_fdt()")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring (Arm) <[email protected]>

show more ...

efi: apply memblock cap after memblock_add()

On arm64, during kdump kernel saves vmcore, it runs into the following bug:
...
[ 15.148919] usercopy: Kernel memory exposure attempt detected from SLU

efi: apply memblock cap after memblock_add()

On arm64, during kdump kernel saves vmcore, it runs into the following bug:
...
[ 15.148919] usercopy: Kernel memory exposure attempt detected from SLUB object 'kmem_cache_node' (offset 0, size 4096)!
[ 15.159707] ------------[ cut here ]------------
[ 15.164311] kernel BUG at mm/usercopy.c:99!
[ 15.168482] Internal error: Oops - BUG: 0 [#1] SMP
[ 15.173261] Modules linked in: xfs libcrc32c crct10dif_ce ghash_ce sha2_ce sha256_arm64 sha1_ce sbsa_gwdt ast i2c_algo_bit drm_vram_helper drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec drm_ttm_helper ttm drm nvme nvme_core xgene_hwmon i2c_designware_platform i2c_designware_core dm_mirror dm_region_hash dm_log dm_mod overlay squashfs zstd_decompress loop
[ 15.206186] CPU: 0 PID: 542 Comm: cp Not tainted 5.16.0-rc4 #1
[ 15.212006] Hardware name: GIGABYTE R272-P30-JG/MP32-AR0-JG, BIOS F12 (SCP: 1.5.20210426) 05/13/2021
[ 15.221125] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 15.228073] pc : usercopy_abort+0x9c/0xa0
[ 15.232074] lr : usercopy_abort+0x9c/0xa0
[ 15.236070] sp : ffff8000121abba0
[ 15.239371] x29: ffff8000121abbb0 x28: 0000000000003000 x27: 0000000000000000
[ 15.246494] x26: 0000000080000400 x25: 0000ffff885c7000 x24: 0000000000000000
[ 15.253617] x23: 000007ff80400000 x22: ffff07ff80401000 x21: 0000000000000001
[ 15.260739] x20: 0000000000001000 x19: ffff07ff80400000 x18: ffffffffffffffff
[ 15.267861] x17: 656a626f2042554c x16: 53206d6f72662064 x15: 6574636574656420
[ 15.274983] x14: 74706d6574746120 x13: 2129363930342065 x12: 7a6973202c302074
[ 15.282105] x11: ffffc8b041d1b148 x10: 00000000ffff8000 x9 : ffffc8b04012812c
[ 15.289228] x8 : 00000000ffff7fff x7 : ffffc8b041d1b148 x6 : 0000000000000000
[ 15.296349] x5 : 0000000000000000 x4 : 0000000000007fff x3 : 0000000000000000
[ 15.303471] x2 : 0000000000000000 x1 : ffff07ff8c064800 x0 : 000000000000006b
[ 15.310593] Call trace:
[ 15.313027] usercopy_abort+0x9c/0xa0
[ 15.316677] __check_heap_object+0xd4/0xf0
[ 15.320762] __check_object_size.part.0+0x160/0x1e0
[ 15.325628] __check_object_size+0x2c/0x40
[ 15.329711] copy_oldmem_page+0x7c/0x140
[ 15.333623] read_from_oldmem.part.0+0xfc/0x1c0
[ 15.338142] __read_vmcore.constprop.0+0x23c/0x350
[ 15.342920] read_vmcore+0x28/0x34
[ 15.346309] proc_reg_read+0xb4/0xf0
[ 15.349871] vfs_read+0xb8/0x1f0
[ 15.353088] ksys_read+0x74/0x100
[ 15.356390] __arm64_sys_read+0x28/0x34
...

This bug introduced by commit b261dba2fdb2 ("arm64: kdump: Remove custom
linux,usable-memory-range handling"), which moves
memblock_cap_memory_range() to fdt, but it breaches the rules that
memblock_cap_memory_range() should come after memblock_add() etc as said
in commit e888fa7bb882 ("memblock: Check memory add/cap ordering").

As a consequence, the virtual address set up by copy_oldmem_page() does
not bail out from the test of virt_addr_valid() in check_heap_object(),
and finally hits the BUG_ON().

Since memblock allocator has no idea about when the memblock is fully
populated, while efi_init() is aware, so tackling this issue by calling the
interface early_init_dt_check_for_usable_mem_range() exposed by of/fdt.

Fixes: b261dba2fdb2 ("arm64: kdump: Remove custom linux,usable-memory-range handling")
Signed-off-by: Pingfan Liu <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Zhen Lei <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Frank Rowand <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Nick Terrell <[email protected]>
Cc: [email protected]
To: [email protected]
To: [email protected]
Acked-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

show more ...

of/fdt: Rework early_init_dt_scan_memory() to call directly

Use of the of_scan_flat_dt() function predates libfdt and is discouraged
as libfdt provides a nicer set of APIs. Rework
early_init_dt_scan

of/fdt: Rework early_init_dt_scan_memory() to call directly

Use of the of_scan_flat_dt() function predates libfdt and is discouraged
as libfdt provides a nicer set of APIs. Rework
early_init_dt_scan_memory() to be called directly and use libfdt.

Cc: John Crispin <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Frank Rowand <[email protected]>
Cc: [email protected]
Cc: [email protected]
Reviewed-by: Frank Rowand <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
Tested-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

show more ...

of/fdt: Rework early_init_dt_scan_root() to call directly

Use of the of_scan_flat_dt() function predates libfdt and is discouraged
as libfdt provides a nicer set of APIs. Rework early_init_dt_scan_r

of/fdt: Rework early_init_dt_scan_root() to call directly

Use of the of_scan_flat_dt() function predates libfdt and is discouraged
as libfdt provides a nicer set of APIs. Rework early_init_dt_scan_root()
to be called directly and use libfdt.

Cc: Michael Ellerman <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Frank Rowand <[email protected]>
Cc: [email protected]
Signed-off-by: Rob Herring <[email protected]>
Reviewed-by: Frank Rowand <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

show more ...

of/fdt: Rework early_init_dt_scan_chosen() to call directly

Use of the of_scan_flat_dt() function predates libfdt and is discouraged
as libfdt provides a nicer set of APIs. Rework
early_init_dt_scan

of/fdt: Rework early_init_dt_scan_chosen() to call directly

Use of the of_scan_flat_dt() function predates libfdt and is discouraged
as libfdt provides a nicer set of APIs. Rework
early_init_dt_scan_chosen() to be called directly and use libfdt.

Cc: Michael Ellerman <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Frank Rowand <[email protected]>
Cc: [email protected]
Signed-off-by: Rob Herring <[email protected]>
Reviewed-by: Frank Rowand <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

show more ...

x86/of: Kill unused early_init_dt_scan_chosen_arch()

There are no callers for early_init_dt_scan_chosen_arch(), so remove it.

Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Borislav Pe

x86/of: Kill unused early_init_dt_scan_chosen_arch()

There are no callers for early_init_dt_scan_chosen_arch(), so remove it.

Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Frank Rowand <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

show more ...

of: fdt: Remove weak early_init_dt_mark_hotplug_memory_arch()

Commit 41a9ada3e6b4253f ("of/fdt: mark hotpluggable memory") introduced
two (for systems with and without memblock) weak versions of
ear

of: fdt: Remove weak early_init_dt_mark_hotplug_memory_arch()

Commit 41a9ada3e6b4253f ("of/fdt: mark hotpluggable memory") introduced
two (for systems with and without memblock) weak versions of
early_init_dt_mark_hotplug_memory_arch(), that could be overridden by an
architecture-specific version. However, no overrides ever emerged.
Later, commit aca52c3983891060 ("mm: remove CONFIG_HAVE_MEMBLOCK")
removed the non-memblock version.

Remove early_init_dt_mark_hotplug_memory_arch(), and replace it by a
direct call to memblock_mark_hotplug().

Signed-off-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/1a61f75ec50d3c2922fcdbe33337266a58a4125f.1628671960.git.geert+renesas@glider.be
Signed-off-by: Rob Herring <[email protected]>

show more ...

of: fdt: Remove early_init_dt_reserve_memory_arch() override capability

Commit e7ae8d174eec0b3b ("MIPS: replace add_memory_region with
memblock") removed the last architecture-specific override of
e

of: fdt: Remove early_init_dt_reserve_memory_arch() override capability

Commit e7ae8d174eec0b3b ("MIPS: replace add_memory_region with
memblock") removed the last architecture-specific override of
early_init_dt_reserve_memory_arch().
Convert the common implementation from a weak global function to a
static function.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/be0140a0183ecfd0a3afa4fe6d2d77ed418102f9.1628671897.git.geert+renesas@glider.be
Signed-off-by: Rob Herring <[email protected]>

show more ...

of/fdt: Remove dead code and mark functions with __init

Some functions in here are never called, and others are only called
during __init. Remove the dead code and some dead exports for functions
th

of/fdt: Remove dead code and mark functions with __init

Some functions in here are never called, and others are only called
during __init. Remove the dead code and some dead exports for functions
that don't exist (I'm looking at you of_fdt_get_string!). Mark some
functions with __init so we can throw them away after we boot up and
poke at the FDT blob too.

Cc: Hsin-Yi Wang <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

show more ...

x86/headers: Fix -Wmissing-prototypes warning

When building the kernel with W=1 we get a lot of -Wmissing-prototypes
warnings, which are trivial in nature and easy to fix - and which may
mask some r

x86/headers: Fix -Wmissing-prototypes warning

When building the kernel with W=1 we get a lot of -Wmissing-prototypes
warnings, which are trivial in nature and easy to fix - and which may
mask some real future bugs if the prototypes get out of sync with
the function definition.

This patch fixes most of -Wmissing-prototypes warnings which
are in the root directory of arch/x86/kernel, not including
the subdirectories.

These are the warnings fixed in this patch:

arch/x86/kernel/signal.c:865:17: warning: no previous prototype for ‘sys32_x32_rt_sigreturn’ [-Wmissing-prototypes]
arch/x86/kernel/signal_compat.c:164:6: warning: no previous prototype for ‘sigaction_compat_abi’ [-Wmissing-prototypes]
arch/x86/kernel/traps.c:625:46: warning: no previous prototype for ‘sync_regs’ [-Wmissing-prototypes]
arch/x86/kernel/traps.c:640:24: warning: no previous prototype for ‘fixup_bad_iret’ [-Wmissing-prototypes]
arch/x86/kernel/traps.c:929:13: warning: no previous prototype for ‘trap_init’ [-Wmissing-prototypes]
arch/x86/kernel/irq.c:270:28: warning: no previous prototype for ‘smp_x86_platform_ipi’ [-Wmissing-prototypes]
arch/x86/kernel/irq.c:301:16: warning: no previous prototype for ‘smp_kvm_posted_intr_ipi’ [-Wmissing-prototypes]
arch/x86/kernel/irq.c:314:16: warning: no previous prototype for ‘smp_kvm_posted_intr_wakeup_ipi’ [-Wmissing-prototypes]
arch/x86/kernel/irq.c:328:16: warning: no previous prototype for ‘smp_kvm_posted_intr_nested_ipi’ [-Wmissing-prototypes]
arch/x86/kernel/irq_work.c:16:28: warning: no previous prototype for ‘smp_irq_work_interrupt’ [-Wmissing-prototypes]
arch/x86/kernel/irqinit.c:79:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
arch/x86/kernel/quirks.c:672:13: warning: no previous prototype for ‘early_platform_quirks’ [-Wmissing-prototypes]
arch/x86/kernel/tsc.c:1499:15: warning: no previous prototype for ‘calibrate_delay_is_known’ [-Wmissing-prototypes]
arch/x86/kernel/process.c:653:13: warning: no previous prototype for ‘arch_post_acpi_subsys_init’ [-Wmissing-prototypes]
arch/x86/kernel/process.c:717:15: warning: no previous prototype for ‘arch_randomize_brk’ [-Wmissing-prototypes]
arch/x86/kernel/process.c:784:6: warning: no previous prototype for ‘do_arch_prctl_common’ [-Wmissing-prototypes]
arch/x86/kernel/reboot.c:869:6: warning: no previous prototype for ‘nmi_panic_self_stop’ [-Wmissing-prototypes]
arch/x86/kernel/smp.c:176:27: warning: no previous prototype for ‘smp_reboot_interrupt’ [-Wmissing-prototypes]
arch/x86/kernel/smp.c:260:28: warning: no previous prototype for ‘smp_reschedule_interrupt’ [-Wmissing-prototypes]
arch/x86/kernel/smp.c:281:28: warning: no previous prototype for ‘smp_call_function_interrupt’ [-Wmissing-prototypes]
arch/x86/kernel/smp.c:291:28: warning: no previous prototype for ‘smp_call_function_single_interrupt’ [-Wmissing-prototypes]
arch/x86/kernel/ftrace.c:840:6: warning: no previous prototype for ‘arch_ftrace_update_trampoline’ [-Wmissing-prototypes]
arch/x86/kernel/ftrace.c:934:7: warning: no previous prototype for ‘arch_ftrace_trampoline_func’ [-Wmissing-prototypes]
arch/x86/kernel/ftrace.c:946:6: warning: no previous prototype for ‘arch_ftrace_trampoline_free’ [-Wmissing-prototypes]
arch/x86/kernel/crash.c:114:6: warning: no previous prototype for ‘crash_smp_send_stop’ [-Wmissing-prototypes]
arch/x86/kernel/crash.c:351:5: warning: no previous prototype for ‘crash_setup_memmap_entries’ [-Wmissing-prototypes]
arch/x86/kernel/crash.c:424:5: warning: no previous prototype for ‘crash_load_segments’ [-Wmissing-prototypes]
arch/x86/kernel/machine_kexec_64.c:372:7: warning: no previous prototype for ‘arch_kexec_kernel_image_load’ [-Wmissing-prototypes]
arch/x86/kernel/paravirt-spinlocks.c:12:16: warning: no previous prototype for ‘__native_queued_spin_unlock’ [-Wmissing-prototypes]
arch/x86/kernel/paravirt-spinlocks.c:18:6: warning: no previous prototype for ‘pv_is_native_spin_unlock’ [-Wmissing-prototypes]
arch/x86/kernel/paravirt-spinlocks.c:24:16: warning: no previous prototype for ‘__native_vcpu_is_preempted’ [-Wmissing-prototypes]
arch/x86/kernel/paravirt-spinlocks.c:30:6: warning: no previous prototype for ‘pv_is_native_vcpu_is_preempted’ [-Wmissing-prototypes]
arch/x86/kernel/kvm.c:258:1: warning: no previous prototype for ‘do_async_page_fault’ [-Wmissing-prototypes]
arch/x86/kernel/jailhouse.c:200:6: warning: no previous prototype for ‘jailhouse_paravirt’ [-Wmissing-prototypes]
arch/x86/kernel/check.c:91:13: warning: no previous prototype for ‘setup_bios_corruption_check’ [-Wmissing-prototypes]
arch/x86/kernel/check.c:139:6: warning: no previous prototype for ‘check_for_bios_corruption’ [-Wmissing-prototypes]
arch/x86/kernel/devicetree.c:32:13: warning: no previous prototype for ‘early_init_dt_scan_chosen_arch’ [-Wmissing-prototypes]
arch/x86/kernel/devicetree.c:42:13: warning: no previous prototype for ‘add_dtb’ [-Wmissing-prototypes]
arch/x86/kernel/devicetree.c:108:6: warning: no previous prototype for ‘x86_of_pci_init’ [-Wmissing-prototypes]
arch/x86/kernel/devicetree.c:314:13: warning: no previous prototype for ‘x86_dtb_init’ [-Wmissing-prototypes]
arch/x86/kernel/tracepoint.c:16:5: warning: no previous prototype for ‘trace_pagefault_reg’ [-Wmissing-prototypes]
arch/x86/kernel/tracepoint.c:22:6: warning: no previous prototype for ‘trace_pagefault_unreg’ [-Wmissing-prototypes]
arch/x86/kernel/head64.c:113:22: warning: no previous prototype for ‘__startup_64’ [-Wmissing-prototypes]
arch/x86/kernel/head64.c:262:15: warning: no previous prototype for ‘__startup_secondary_64’ [-Wmissing-prototypes]
arch/x86/kernel/head64.c:350:12: warning: no previous prototype for ‘early_make_pgtable’ [-Wmissing-prototypes]

[ mingo: rewrote the changelog, fixed build errors. ]

Signed-off-by: Yi Wang <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

show more ...

of/fdt: use memblock_virt_alloc for early alloc

memblock_virt_alloc() works for both memblock and bootmem, so use it and
make early_init_dt_alloc_memory_arch a static function. The arches using
boot

of/fdt: use memblock_virt_alloc for early alloc

memblock_virt_alloc() works for both memblock and bootmem, so use it and
make early_init_dt_alloc_memory_arch a static function. The arches using
bootmem define early_init_dt_alloc_memory_arch as either:

__alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS))

or:

alloc_bootmem_align(size, align)

Both of these evaluate to the same thing as does memblock_virt_alloc for
bootmem. So we can disable the arch specific functions by making
early_init_dt_alloc_memory_arch static and they can be removed in
subsequent commits.

Cc: Frank Rowand <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

show more ...

of: Use SPDX license tag for DT files

Convert remaining DT files to use SPDX-License-Identifier tags.

Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Guennadi Liakhovetski <g.liakhovetski

of: Use SPDX license tag for DT files

Convert remaining DT files to use SPDX-License-Identifier tags.

Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Guennadi Liakhovetski <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Pantelis Antoniou <[email protected]>
Reviewed-by: Frank Rowand <[email protected]>
Reviewed-by: Philippe Ombredanne <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

show more ...

of/fdt: Fix #ifdef dependency of early flattree declarations

If OF_FLATTREE=y, but OF_EARLY_FLATTREE=n:

drivers/tty/serial/earlycon.o: In function `param_setup_earlycon':
earlycon.c:(.init.

of/fdt: Fix #ifdef dependency of early flattree declarations

If OF_FLATTREE=y, but OF_EARLY_FLATTREE=n:

drivers/tty/serial/earlycon.o: In function `param_setup_earlycon':
earlycon.c:(.init.text+0x3a4): undefined reference to `early_init_dt_scan_chosen_stdout'

Fix this by moving the early flattree forward declarations and dummy
implementations inside an #ifdef CONFIG_OF_EARLY_FLATTREE block.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

show more ...

of: make of_fdt_is_compatible() static

The callers of of_fdt_is_compatible() are all in fdt.c so
make it static.

Signed-off-by: Frank Rowand <[email protected]>
Signed-off-by: Rob Herring <robh

of: make of_fdt_is_compatible() static

The callers of of_fdt_is_compatible() are all in fdt.c so
make it static.

Signed-off-by: Frank Rowand <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

show more ...

of/fdt: introduce of_scan_flat_dt_subnodes and of_get_flat_dt_phandle

Introduce primitives for FDT parsing. These will be used for powerpc
cpufeatures node scanning, which has quite complex structur

of/fdt: introduce of_scan_flat_dt_subnodes and of_get_flat_dt_phandle

Introduce primitives for FDT parsing. These will be used for powerpc
cpufeatures node scanning, which has quite complex structure but should
be processed early.

Cc: [email protected]
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

show more ...

of/fdt: mark hotpluggable memory

When movable nodes are enabled, any node containing only hotpluggable
memory is made movable at boot time.

On x86, hotpluggable memory is discovered by parsing the

of/fdt: mark hotpluggable memory

When movable nodes are enabled, any node containing only hotpluggable
memory is made movable at boot time.

On x86, hotpluggable memory is discovered by parsing the ACPI SRAT,
making corresponding calls to memblock_mark_hotplug().

If we introduce a dt property to describe memory as hotpluggable,
configs supporting early fdt may then also do this marking and use
movable nodes.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Reza Arbab <[email protected]>
Tested-by: Balbir Singh <[email protected]>
Acked-by: Balbir Singh <[email protected]>
Cc: "Aneesh Kumar K.V" <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Aneesh Kumar K.V <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Bharata B Rao <[email protected]>
Cc: Frank Rowand <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nathan Fontenot <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Stewart Smith <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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of/serial: move earlycon early_param handling to serial

We have multiple "earlycon" early_param handlers - merge the DT one into
the main earlycon one. It's a cleanup that also will be useful
to de

of/serial: move earlycon early_param handling to serial

We have multiple "earlycon" early_param handlers - merge the DT one into
the main earlycon one. It's a cleanup that also will be useful
to defer setting up DT console until ACPI/DT decision is made.

Rename the exported function to avoid clashing with the function from
arch/microblaze/kernel/prom.c

Signed-off-by: Leif Lindholm <[email protected]>
Signed-off-by: Aleksey Makarov <[email protected]>
Acked-by: Rob Herring <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Reviewed-by: Peter Hurley <[email protected]>
Tested-by: Kefeng Wang <[email protected]>
Tested-by: Christopher Covington <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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FDT: Add a helper to get the subnode by given name

Sometimes it needs to check if there is a subnode of given node in FDT
by given name. Introduce this helper to get the subnode if it exists.

CC: R

FDT: Add a helper to get the subnode by given name

Sometimes it needs to check if there is a subnode of given node in FDT
by given name. Introduce this helper to get the subnode if it exists.

CC: Rob Herring <[email protected]>
Signed-off-by: Shannon Zhao <[email protected]>
Acked-by: Stefano Stabellini <[email protected]>
Acked-by: Rob Herring <[email protected]>
Tested-by: Julien Grall <[email protected]>

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drivers/of: Return allocated memory from of_fdt_unflatten_tree()

This returns the allocate memory chunk, storing the unflattened device
tree, from of_fdt_unflatten_tree() so that memory chunk can be

drivers/of: Return allocated memory from of_fdt_unflatten_tree()

This returns the allocate memory chunk, storing the unflattened device
tree, from of_fdt_unflatten_tree() so that memory chunk can be released
on demand in PowerNV PCI hotplug driver.

Signed-off-by: Gavin Shan <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

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drivers/of: Specify parent node in of_fdt_unflatten_tree()

This adds one more argument to of_fdt_unflatten_tree() to specify
the parent node of the FDT blob that is going to be unflattened.
In the r

drivers/of: Specify parent node in of_fdt_unflatten_tree()

This adds one more argument to of_fdt_unflatten_tree() to specify
the parent node of the FDT blob that is going to be unflattened.
In the result, the function can be used to unflatten FDT blob that
represents device sub-tree in PowerNV PCI hotplug driver.

Cc: Jyri Sarha <[email protected]>
Signed-off-by: Gavin Shan <[email protected]>
Acked-by: Rob Herring <[email protected]>
Acked-by: Jyri Sarha <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

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of: earlycon: Move address translation to of_setup_earlycon()

Cleanup the early DT/earlycon separation; remove the 'addr' parameter
from of_setup_earlycon() and get the uart phys addr directly with

of: earlycon: Move address translation to of_setup_earlycon()

Cleanup the early DT/earlycon separation; remove the 'addr' parameter
from of_setup_earlycon() and get the uart phys addr directly with a
new wrapper function, of_flat_dt_translate_addr(). Limit
fdt_translate_address() to file scope.

Acked-by: Rob Herring <[email protected]>
Signed-off-by: Peter Hurley <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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of/fdt: split off FDT self reservation from memreserve processing

This splits off the reservation of the memory occupied by the FDT
binary itself from the processing of the memory reservations it
co

of/fdt: split off FDT self reservation from memreserve processing

This splits off the reservation of the memory occupied by the FDT
binary itself from the processing of the memory reservations it
contains. This is necessary because the physical address of the FDT,
which is needed to perform the reservation, may not be known to the
FDT driver core, i.e., it may be mapped outside the linear direct
mapping, in which case __pa() returns a bogus value.

Cc: Russell King <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Acked-by: Rob Herring <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>

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of/fdt: Make fdt blob input parameters of unflatten functions const

Operations to unflatten fdt blobs never modify the input blobs, hence
make them const. Now we no longer need to cast arbitrary con

of/fdt: Make fdt blob input parameters of unflatten functions const

Operations to unflatten fdt blobs never modify the input blobs, hence
make them const. Now we no longer need to cast arbitrary const data to
"void *" when calling of_fdt_unflatten_tree().

Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

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of/fdt: Add endianness helper function for early init code

Provide a libfdt-based equivalent for of_device_is_big_endian(), suitable
for use in the early_init_* functions.

Signed-off-by: Kevin Cern

of/fdt: Add endianness helper function for early init code

Provide a libfdt-based equivalent for of_device_is_big_endian(), suitable
for use in the early_init_* functions.

Signed-off-by: Kevin Cernekee <[email protected]>
Reviewed-by: Peter Hurley <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

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of: Add memory limiting function for flattened devicetrees

Buggy bootloaders may pass bogus memory entries in the devicetree.
Add of_fdt_limit_memory to add an upper bound on the number of
entries t

of: Add memory limiting function for flattened devicetrees

Buggy bootloaders may pass bogus memory entries in the devicetree.
Add of_fdt_limit_memory to add an upper bound on the number of
entries that can be present in the devicetree.

Signed-off-by: Laura Abbott <[email protected]>
Tested-by: Andreas Färber <[email protected]>
Signed-off-by: Grant Likely <[email protected]>

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