eal/arm: add WFET in power management intrinsics

Wait for event with timeout (WFET) puts the CPU in a low power
mode and stays there until an event is signalled (SEV), loss of
an exclusive monitor o

eal/arm: add WFET in power management intrinsics

Wait for event with timeout (WFET) puts the CPU in a low power
mode and stays there until an event is signalled (SEV), loss of
an exclusive monitor or a timeout.
WFET is enabled selectively by checking FEAT_WFxT in Linux
auxiliary vector. If FEAT_WFxT is not available power management
will fallback to WFE.
WFE is available on all the Arm platforms supported by DPDK.
Therefore, the RTE_ARM_USE_WFE macro is not required to enable
the WFE feature for PMD power monitoring. 
RTE_ARM_USE_WFE is used at the build time to use the WFE instruction
where applicable in the code at the developer's discretion rather
than as an indicator of the instruction's availability.

Signed-off-by: Wathsala Vithanage <wathsala.vithanage@arm.com>
Reviewed-by: Dhruv Tripathi <dhruv.tripathi@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Reviewed-by: Jack Bond-Preston <jack.bond-preston@foss.arm.com>
Reviewed-by: Nick Connolly <nick.connolly@arm.com>
Reviewed-by: Vinod Krishna <vinod.krishna@arm.com>

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eal/arm: expand availability of WFE related instructions

The availability of __RTE_ARM_WFE, __RTE_ARM_SEV, __RTE_ARM_SEVL,
and __RTE_ARM_LOAD_EXC_* macros for other applications, such as
PMD power

eal/arm: expand availability of WFE related instructions

The availability of __RTE_ARM_WFE, __RTE_ARM_SEV, __RTE_ARM_SEVL,
and __RTE_ARM_LOAD_EXC_* macros for other applications, such as
PMD power management, should not depend on the choice of use of
these instructions in rte_wait_until_equal_N functions.
Therefore, this patch moves these macros out of control of the
RTE_WAIT_UNTIL_EQUAL_ARCH_DEFINED macro.

Signed-off-by: Wathsala Vithanage <wathsala.vithanage@arm.com>
Reviewed-by: Dhruv Tripathi <dhruv.tripathi@arm.com>

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eal: use stdatomic API in public headers

Adapt the EAL public headers to use rte optional atomics API instead of
directly using and exposing toolchain specific atomic builtin intrinsics.

Signed-off

eal: use stdatomic API in public headers

Adapt the EAL public headers to use rte optional atomics API instead of
directly using and exposing toolchain specific atomic builtin intrinsics.

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Reviewed-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>

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eal/arm: add power management intrinsics

For Arm arch, use WFE instruction to enable power monitor API, and use
SEV instruction to enable wake up API.

A monitoring condition may refer to one byte d

eal/arm: add power management intrinsics

For Arm arch, use WFE instruction to enable power monitor API, and use
SEV instruction to enable wake up API.

A monitoring condition may refer to one byte data.
Add 8 bits case for atomic exclusive helpers.

Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: David Hunt <david.hunt@intel.com>

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eal: remove unneeded includes from a public header

Do not include <ctype.h>, <errno.h>, and <stdlib.h> from <rte_common.h>,
because they are not used by this file.
Include the needed headers directl

eal: remove unneeded includes from a public header

Do not include <ctype.h>, <errno.h>, and <stdlib.h> from <rte_common.h>,
because they are not used by this file.
Include the needed headers directly from the files that need them.

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

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eal: add power monitor for multiple events

Use RTM and WAITPKG instructions to perform a wait-for-writes similar to
what UMWAIT does, but without the limitation of having to listen for
just one even

eal: add power monitor for multiple events

Use RTM and WAITPKG instructions to perform a wait-for-writes similar to
what UMWAIT does, but without the limitation of having to listen for
just one event. This works because the optimized power state used by the
TPAUSE instruction will cause a wake up on RTM transaction abort, so if
we add the addresses we're interested in to the read-set, any write to
those addresses will wake us up.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Tested-by: David Hunt <david.hunt@intel.com>

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lib: remove librte_ prefix from directory names

There is no reason for the DPDK libraries to all have 'librte_' prefix on
the directory names. This prefix makes the directory names longer and also
m

lib: remove librte_ prefix from directory names

There is no reason for the DPDK libraries to all have 'librte_' prefix on
the directory names. This prefix makes the directory names longer and also
makes it awkward to add features referring to individual libraries in the
build - should the lib names be specified with or without the prefix.
Therefore, we can just remove the library prefix and use the library's
unique name as the directory name, i.e. 'eal' rather than 'librte_eal'

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>

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