From: Noam Camus
Due to a HW bug in NPS400 we get from time to time false TLB miss.
Workaround this by validating each miss.
Signed-off-by: Noam Camus
---
arch/arc/mm/tlbex.S |9 +
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbe
From: Noam Camus
When HW threads are active we want CPU to enter idle state only
for the calling HW thread and not to put on sleep all HW threads
sharing this core. For this need the NPS400 got dedicated instruction
so only calling thread is entring sleep and all other are still awake
and can exe
From: Noam Camus
This way when we execute "ex" during trying to hold lock we can switch to
other HW thread and utilize the core intead of just spinning on a lock.
We noticed about 10% improvement of execution time with hackbench test.
Signed-off-by: Noam Camus
---
arch/arc/include/asm/spinloc
From: Noam Camus
For User Mode Memory Bus Error some platforms do not creat interrupt
level 2 e.g. nps400 creates machine check exception.
Turning mem_service into weak symbol allows each platform to override
mem_service with its own implementation.
Signed-off-by: Noam Camus
---
arch/arc/kerne
From: Noam Camus
The reasons are:
1) speeding up boot time, becomes critical for many CPUs machine,
e.g. NPS400 with 4K CPUs
2) shorten kernel log at boot time, again easy to scan for large
scale machines such NPS400
Signed-off-by: Noam Camus
---
arch/arc/kernel/setup.c |6 +++---
ar
From: Liav Rehana
Signed-off-by: Liav Rehana
Signed-off-by: Noam Camus
Reviewed-by: Alexey Brodkin
---
arch/arc/mm/fault.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c
index 162c975..a0b7bd6 100644
--- a/arch/arc/mm/fault.
From: Noam Camus
This commit adds the configuration CONFIG_EZNPS_MEM_ERROR.
If set, it will cause the kernel to handle user memory error
as a machine check exception.
It is required in order to align the NPS simulator memory
error handling to the one of the NPS400 real chip behavior.
We override
From: Liav Rehana
Signed-off-by: Liav Rehana
Signed-off-by: Noam Camus
Reviewed-by: Alexey Brodkin
---
arch/arc/kernel/entry-compact.S | 22 +++---
1 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/arch/arc/kernel/entry-compact.S b/arch/arc/kernel/entry-compac
From: Noam Camus
This counter represents threshold for consecutive stall that which
trigger HW threads scheduling.
When this feature is enabled low values of this counter cause
downgrade in performance and in the worst case even a livelock.
Remove those couple of lines and resort to HW reset val
From: Noam Camus
Change Log
---
v1 --> v2:
Outcome of Alexey Brodkin comments
1) Turned mem_service into weak symbol, so it can be override
by any platform
2) remove ifedf wrapper on '88' lable at assembly of TLB exception.
With this patch set I continue the effort of upstreaming the
ez
From: Noam Camus
This patch is derived due to performance issue.
The use case is a page fault that resides on more than the local cpu.
Trying to broadcast all CPUs results on performance degradation.
So we try to avoid this by sending only to the relevant CPUs.
Signed-off-by: Noam Camus
Reviewe
From: Noam Camus
Signed-off-by: Noam Camus
Reviewed-by: Alexey Brodkin
---
arch/arc/plat-eznps/Kconfig |4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arc/plat-eznps/Kconfig b/arch/arc/plat-eznps/Kconfig
index 1595a38..feaa471 100644
--- a/arch/arc/plat-eznps/K
The function name is now renamed to 'timer_probe' for consistency with
the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change.
Signed-off-by: Daniel Lezcano
---
arch/arc/kernel/setup.c | 2 +-
arch/arm/kernel/time.c | 2 +-
arch/arm/mach-mediatek/mediatek.c
The CLOCKSOUCE_OF_DECLARE macro is used widely for the timers to declare the
clocksource at early stage. However, this macro is also used to initialize
the clockevent if any, or the clockevent only.
It was originally suggested to declare another macro to initialize a
clockevent, so in order to sep
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