microblaze: Add custom break vector handler for mb manager

When the TMR Manager detects a fault Lockstep state it is signaled to the
MicroBlaze processors by asserting a break signal, When Microblaz

microblaze: Add custom break vector handler for mb manager

When the TMR Manager detects a fault Lockstep state it is signaled to the
MicroBlaze processors by asserting a break signal, When Microblaze gets
a break vector from tmr Microblaze it's needed to clear/block the break
bit in the tmr manager before performing recovery.
In order to perform recovery need to perform the following steps.
1) Store all internal MicroBlaze registers in RAM
2) Execute a suspend instruction which asserts the reset signal
3) Restore all registers from RAM and execute an RTBD instruction to
return from the reset handler, to resume execution at the place
where the break occurred.

This API supports getting called from kernel space only.

Signed-off-by: Appana Durga Kedareswara rao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Michal Simek <[email protected]>

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uaccess: remove CONFIG_SET_FS

There are no remaining callers of set_fs(), so CONFIG_SET_FS
can be removed globally, along with the thread_info field and
any references to it.

This turns access_ok()

uaccess: remove CONFIG_SET_FS

There are no remaining callers of set_fs(), so CONFIG_SET_FS
can be removed globally, along with the thread_info field and
any references to it.

This turns access_ok() into a cheaper check against TASK_SIZE_MAX.

As CONFIG_SET_FS is now gone, drop all remaining references to
set_fs()/get_fs(), mm_segment_t, user_addr_max() and uaccess_kernel().

Acked-by: Sam Ravnborg <[email protected]> # for sparc32 changes
Acked-by: "Eric W. Biederman" <[email protected]>
Tested-by: Sergey Matyukevich <[email protected]> # for arc changes
Acked-by: Stafford Horne <[email protected]> # [openrisc, asm-generic]
Acked-by: Dinh Nguyen <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

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sched,arch: Remove unused TASK_STATE offsets

All 6 architectures define TASK_STATE in asm-offsets, but then never
actually use it. Remove the definitions to make sure they never will.

Signed-off-by

sched,arch: Remove unused TASK_STATE offsets

All 6 architectures define TASK_STATE in asm-offsets, but then never
actually use it. Remove the definitions to make sure they never will.

Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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microblaze: Remove noMMU code

This configuration is obsolete and likely none is really using it. That's
why remove it to simplify code.

Note about CONFIG_MMU in hw_exception_handler.S is left inten

microblaze: Remove noMMU code

This configuration is obsolete and likely none is really using it. That's
why remove it to simplify code.

Note about CONFIG_MMU in hw_exception_handler.S is left intentionally
for better comment understanding.

Cc: Mike Rapoport <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Acked-by: Mike Rapoport <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/r/43486cab370e0c0a79860120b71e0caac75a7e44.1606397528.git.michal.simek@xilinx.com

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microblaze: Remove "cache" optimized copy_page function

Current implementation doesn't handle dcache_line_length
correctly that's why is better to use generic memcpy.

Cache optimized function could

microblaze: Remove "cache" optimized copy_page function

Current implementation doesn't handle dcache_line_length
correctly that's why is better to use generic memcpy.

Cache optimized function could be good way howto improve
performance but must be based on benchmarking not blind
function like this.

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

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microblaze: Add support from PREEMPT

This patch add core PREEMPT support for Microblaze.
I tried to trace it via tracers and I was able to see any output.

I also added low level debug functions to

microblaze: Add support from PREEMPT

This patch add core PREEMPT support for Microblaze.
I tried to trace it via tracers and I was able to see any output.

I also added low level debug functions to see if that code is called.

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

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microblaze_mmu_v2: MMU asm offset update

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

microblaze: Rename kernel_mode to pt_mode in pt_regs

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

microblaze_v8: asm-offsets.c

Reviewed-by: Ingo Molnar <[email protected]>
Acked-by: Stephen Neuendorffer <[email protected]>
Acked-by: John Linn <[email protected]>
Acked-by: John Willi

microblaze_v8: asm-offsets.c

Reviewed-by: Ingo Molnar <[email protected]>
Acked-by: Stephen Neuendorffer <[email protected]>
Acked-by: John Linn <[email protected]>
Acked-by: John Williams <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

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