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MIPS: Introduce CAVIUM_RESERVE32 Kconfig option 

This options is used to reserve a shared memory region for user processes
to use for hardware memory buffers. The actual code to support the option
comes in the following patch.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Alexander Sverdlin 2022-07-25 11:17:39 +02:00 committed by Thomas Bogendoerfer
parent d3cd4d9fc1
commit 3e3114ac46
1 changed files with 12 additions and 0 deletions
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12
arch/mips/cavium-octeon/Kconfig
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@ -67,6 +67,18 @@ config CAVIUM_OCTEON_LOCK_L2_MEMCPY
help
Lock the kernel's implementation of memcpy() into L2.
config CAVIUM_RESERVE32
int "Memory to reserve for user processes shared region (MB)"
range 0 1536
default "0"
help
Reserve a shared memory region for user processes to use for hardware
memory buffers. This is required for 32bit applications to be able to
send and receive packets directly. Applications access this memory by
memory mapping /dev/mem for the addresses in /proc/octeon_info. For
optimal performance with HugeTLBs, keep this size an even number of
megabytes.
config OCTEON_ILM
tristate "Module to measure interrupt latency using Octeon CIU Timer"
help