objtool/idle: Validate __cpuidle code as noinstr

Idle code is very like entry code in that RCU isn't available. As
such, add a little validation.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infra

objtool/idle: Validate __cpuidle code as noinstr

Idle code is very like entry code in that RCU isn't available. As
such, add a little validation.

Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Tested-by: Tony Lindgren <[email protected]>
Tested-by: Ulf Hansson <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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microblaze: Fix built-in DTB alignment to be 8-byte aligned

Commit 79edff12060f ("scripts/dtc: Update to upstream version
v1.6.0-51-g183df9e9c2b9") broke booting on Microblaze systems depending on
t

microblaze: Fix built-in DTB alignment to be 8-byte aligned

Commit 79edff12060f ("scripts/dtc: Update to upstream version
v1.6.0-51-g183df9e9c2b9") broke booting on Microblaze systems depending on
the build. The problem is libfdt gained an 8-byte starting alignment check,
but the Microblaze built-in DTB area is only 4-byte aligned. This affected
not just built-in DTBs as bootloader passed DTBs are copied into the
built-in DTB region.

Other arches using built-in DTBs use a common linker macro which has
sufficient alignment.

Fixes: 79edff12060f ("scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9")
Reported-by: Guenter Roeck <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Cc: Michal Simek <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Michal Simek <[email protected]>

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microblaze: Define percpu sestion in linker file

Adding SMP requires to have percpu section defined.

Signed-off-by: Stefan Asserhall <[email protected]>
Signed-off-by: Michal Simek <micha

microblaze: Define percpu sestion in linker file

Adding SMP requires to have percpu section defined.

Signed-off-by: Stefan Asserhall <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>

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microblaze: Move EXCEPTION_TABLE to RO_DATA segment

Since the EXCEPTION_TABLE is read-only, collapse it into RO_DATA.

Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Borislav Petkov

microblaze: Move EXCEPTION_TABLE to RO_DATA segment

Since the EXCEPTION_TABLE is read-only, collapse it into RO_DATA.

Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Rick Edgecombe <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: x86-ml <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

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vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA

Rename RW_DATA_SECTION to RW_DATA. (Calling this a "section" is a lie,
since it's multiple sections and section flags cannot be applied to
the mac

vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA

Rename RW_DATA_SECTION to RW_DATA. (Calling this a "section" is a lie,
since it's multiple sections and section flags cannot be applied to
the macro.)

Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Heiko Carstens <[email protected]> # s390
Acked-by: Geert Uytterhoeven <[email protected]> # m68k
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Rick Edgecombe <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: x86-ml <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

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vmlinux.lds.h: Replace RODATA with RO_DATA

There's no reason to keep the RODATA macro: replace the callers with
the expected RO_DATA macro.

Signed-off-by: Kees Cook <[email protected]>
Signed-o

vmlinux.lds.h: Replace RODATA with RO_DATA

There's no reason to keep the RODATA macro: replace the callers with
the expected RO_DATA macro.

Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Rick Edgecombe <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: x86-ml <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

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vmlinux.lds.h: Move NOTES into RO_DATA

The .notes section should be non-executable read-only data. As such,
move it to the RO_DATA macro instead of being per-architecture defined.

Signed-off-by: Ke

vmlinux.lds.h: Move NOTES into RO_DATA

The .notes section should be non-executable read-only data. As such,
move it to the RO_DATA macro instead of being per-architecture defined.

Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Heiko Carstens <[email protected]> # s390
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Rick Edgecombe <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: x86-ml <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

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microblaze: Increase max dtb size to 64K from 32K

This patch increases max dtb size to 64K from 32K. This fixes the issue of
kernel hang with larger dtb of size greater than 32KB.

Signed-off-by: S

microblaze: Increase max dtb size to 64K from 32K

This patch increases max dtb size to 64K from 32K. This fixes the issue of
kernel hang with larger dtb of size greater than 32KB.

Signed-off-by: Siva Durga Prasad Paladugu <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

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vmlinux.lds.h: Move LSM_TABLE into INIT_DATA

Since the struct lsm_info table is not an initcall, we can just move it
into INIT_DATA like all the other tables.

Signed-off-by: Kees Cook <keescook@chr

vmlinux.lds.h: Move LSM_TABLE into INIT_DATA

Since the struct lsm_info table is not an initcall, we can just move it
into INIT_DATA like all the other tables.

Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Casey Schaufler <[email protected]>
Reviewed-by: John Johansen <[email protected]>
Reviewed-by: James Morris <[email protected]>
Signed-off-by: James Morris <[email protected]>

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nmi_backtrace: generate one-line reports for idle cpus

When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative. Suppress
messag

nmi_backtrace: generate one-line reports for idle cpus

When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative. Suppress
messages for cpus that are idling when they are interrupted and just
emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".

We do this by grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the interrupted
PC to see if it lies within that section.

This commit suitably tags x86 and tile idle routines, and only adds in
the minimal framework for other architectures.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Chris Metcalf <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Daniel Thompson <[email protected]> [arm]
Tested-by: Petr Mladek <[email protected]>
Cc: Aaron Tomlin <[email protected]>
Cc: Peter Zijlstra (Intel) <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Russell King <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections

KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point

arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections

KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.

Move the definition of __irq_entry to <linux/interrupt.h> so that the
users don't need to pull in <linux/ftrace.h>. Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.

Signed-off-by: Alexander Potapenko <[email protected]>
Acked-by: Steven Rostedt <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Konstantin Serebryany <[email protected]>
Cc: Dmitry Chernenkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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microblaze: Add NOTES section to linker script

Do not keep NOTES section align in proper location.

'readelf' shows that 'NOTE' is placed in wrong location
which is out of virtual and physical load

microblaze: Add NOTES section to linker script

Do not keep NOTES section align in proper location.

'readelf' shows that 'NOTE' is placed in wrong location
which is out of virtual and physical load addresses.

Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 1] .note.gnu.build-i NOTE 00000000 001000 000024 00 A 0 0 4
[ 2] .text PROGBITS c0000000 002000 284570 00 AX 0 0 16
[ 3] __fdt_blob PROGBITS c0284570 286570 008000 00 A 0 0 1

Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
LOAD 0x001000 0x00000000 0x00000000 0x00024 0x00024 R 0x1000
LOAD 0x002000 0xc0000000 0x08000000 0x315428 0x316000 RWE 0x1000

This patch move 'NOTE' section to the correct location.

Checked with:
"ARM: 6740/1: Place correctly notes section in the linker script"
(sha1: dc810efb0ca5702c9d96782b99282d4b4383e877)
and
"[S390] incorrect note program header"
(sha1: 7a2512b744e72377c3fa5976f06a3f343e155d1f)

Signed-off-by: Michal Simek <[email protected]>

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mtd/uclinux: Use generic __bss_stop instead of _ebss

The standard (see BSS_SECTION() in <asm-generic/vmlinux.lds.h> and
<asm-generic/sections.h>) symbol for the end of BSS is __bss_stop.
This allows

mtd/uclinux: Use generic __bss_stop instead of _ebss

The standard (see BSS_SECTION() in <asm-generic/vmlinux.lds.h> and
<asm-generic/sections.h>) symbol for the end of BSS is __bss_stop.
This allows to remove all local declarations that have been added to
several architectures just to please CONFIG_MTD_UCLINUX.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Acked-by: Paul Mundt <[email protected]>
Acked-by: Mike Frysinger <[email protected]>
Acked-by: Michal Simek <[email protected]>
Acked-by: Greg Ungerer <[email protected]>

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microblaze: Extend space for compiled-in FDT to 32kB

Signed-off-by: Michal Simek <[email protected]>

microblaze: Remove r0_ram pointer and PTO alignment

r0_ram pool was used for saving/restoring register
content if hw exception happen. This poll was replaced by
pt_pool_space with PT_SIZE size.
Base

microblaze: Remove r0_ram pointer and PTO alignment

r0_ram pool was used for saving/restoring register
content if hw exception happen. This poll was replaced by
pt_pool_space with PT_SIZE size.
Based on this change SAVE_STATE_ARG_SPACE was removed which
caused that PTO offset is zero that's why is also removed.

r0_ram space was used as scratchpad by v850. In early
Microblaze Linux developing phase was this part of code
blindly copied.

Signed-off-by: Michal Simek <[email protected]>

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microblaze: Fix initramfs

Patch: initramfs: generalize initramfs_data.xxx.S variants
(sha1 6ae64e428f74e7bacab898ef9665dda719ea6fde)
requires hooks in linker script.

Signed-off-by: Michal Simek <mo

microblaze: Fix initramfs

Patch: initramfs: generalize initramfs_data.xxx.S variants
(sha1 6ae64e428f74e7bacab898ef9665dda719ea6fde)
requires hooks in linker script.

Signed-off-by: Michal Simek <[email protected]>

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microblaze: Add support for little-endian Microblaze

Microblaze little-endian toolchain exports __MICROBLAZEEL__
which is used in the kernel to identify little/big endian.

The most of the changes a

microblaze: Add support for little-endian Microblaze

Microblaze little-endian toolchain exports __MICROBLAZEEL__
which is used in the kernel to identify little/big endian.

The most of the changes are in loading values from DTB which
is always big endian.

Little endian platforms are based on new AXI bus which has
impact to early uartlite initialization.

Signed-off-by: Michal Simek <[email protected]>

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microblaze: remove OUTPUT_FORMAT from linker script

OUTPUT_FORMAT setup bigendian platform. Microblaze Linux port
is becoming bi endian that's why it is removed.

Signed-off-by: Michal Simek <monstr

microblaze: remove OUTPUT_FORMAT from linker script

OUTPUT_FORMAT setup bigendian platform. Microblaze Linux port
is becoming bi endian that's why it is removed.

Signed-off-by: Michal Simek <[email protected]>

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microblaze: Do not use _start in vmlinux

_start symbol stores physical address where kernel is.
Gdb uses this symbol for their purpose that's why
we have to rename it.

Signed-off-by: Michal Simek <

microblaze: Do not use _start in vmlinux

_start symbol stores physical address where kernel is.
Gdb uses this symbol for their purpose that's why
we have to rename it.

Signed-off-by: Michal Simek <[email protected]>

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microblaze: Allow PAGE_SIZE configuration

Allow developer to configure memory page size at compile time.
Larger pages can improve performance on some workloads.

Based on PowerPC code.

Signed-off-b

microblaze: Allow PAGE_SIZE configuration

Allow developer to configure memory page size at compile time.
Larger pages can improve performance on some workloads.

Based on PowerPC code.

Signed-off-by: Steven J. Magnani <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

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microblaze: Quiet section mismatch warnings

_start is located in .text, which causes mismatch warnings with
machine_early_init() and start_kernel() in .init.text.

Signed-off-by: Steven J. Magnani <

microblaze: Quiet section mismatch warnings

_start is located in .text, which causes mismatch warnings with
machine_early_init() and start_kernel() in .init.text.

Signed-off-by: Steven J. Magnani <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

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microblaze: Add IRQENTRY_TEXT to lds

It is important for ftrace irqsoff support

Signed-off-by: Michal Simek <[email protected]>

microblaze: __init_begin symbol must be aligned

The problem was that free_initmem pass to free_initrd_mem got
bad aligned __init_begin symbol and free_initrd_mem don't care
about __init_end but tak

microblaze: __init_begin symbol must be aligned

The problem was that free_initmem pass to free_initrd_mem got
bad aligned __init_begin symbol and free_initrd_mem don't care
about __init_end but take PAGE_SIZE instead.

Here is behavior in kernel bootlog.
ramdisk_execute_command from (init/main.c) was rewrite

Freeing unused kernel memory: 6224k freed
Failed to execute ��������������{���
Failed to execute ��������������{����. Attempting defaults...
Mounting proc:
Mounting var:

Signed-off-by: Michal Simek <[email protected]>

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microblaze: Fix _start symbol to physical address

_start is setup to physical kernel start address.
This caused that when you load vmlinux (with MMU kernel)
via XMD program counter (pc) is setup cor

microblaze: Fix _start symbol to physical address

_start is setup to physical kernel start address.
This caused that when you load vmlinux (with MMU kernel)
via XMD program counter (pc) is setup correctly
and then you can write con and start kernel.

Signed-off-by: Michal Simek <[email protected]>

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microblaze: Use LOAD_OFFSET macro to get correct LMA for all sections

Currently, vmlinux has LMA==VMA for all sections, which is wrong for MMU
kernels. Previous patches in this series defined the L

microblaze: Use LOAD_OFFSET macro to get correct LMA for all sections

Currently, vmlinux has LMA==VMA for all sections, which is wrong for MMU
kernels. Previous patches in this series defined the LOAD_OFFSET constant,
now we make use of it in our link script.

Other minor changes in this patch:
* brace/indenting cleanup of some sections
* put __fdt_* symbols in their own section, and apply LOAD_OFFSET fixup

Signed-off-by: John Williams <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

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