mirror of
https://github.com/torvalds/linux.git
synced 2024-09-29 19:33:13 +00:00
43b8774dc4
This adds support for hardware-assisted userspace irq masking for special priority levels. Due to the SR.IMASK interactivity, only some platforms implement this in hardware (including but not limited to SH-4A interrupt controllers, and ARM-based SH-Mobile CPUs). Each CPU needs to wire this up on its own, for now only SH7786 is wired up as an example. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
14 lines
467 B
Plaintext
14 lines
467 B
Plaintext
config INTC_USERIMASK
|
|
bool "Userspace interrupt masking support"
|
|
depends on ARCH_SHMOBILE || (SUPERH && CPU_SH4A)
|
|
help
|
|
This enables support for hardware-assisted userspace hardirq
|
|
masking.
|
|
|
|
SH-4A and newer interrupt blocks all support a special shadowed
|
|
page with all non-masking registers obscured when mapped in to
|
|
userspace. This is primarily for use by userspace device
|
|
drivers that are using special priority levels.
|
|
|
|
If in doubt, say N.
|