BMC/Intel-BMC/linux.git/arch/um/kernel/irq.c, branch dev-5.2

um: irq: don't set the chip for all irqs

2019-05-07T21:18:28+00:00

Setting a chip for an interrupt marks it as allocated. Since UM doesn't support dynamic interrupt numbers (yet), it means we cannot simply increase NR_IRQS and then use the free irqs between LAST_IRQ and NR_IRQS with gpio-mockup or iio testing drivers as irq_alloc_descs() will fail after not being able to neither find an unallocated range of interrupts nor expand the range. Only call irq_set_chip_and_handler() for irqs until LAST_IRQ. Signed-off-by: Bartosz Golaszewski Reviewed-by: Anton Ivanov Acked-by: Anton Ivanov Signed-off-by: Richard Weinberger

um: Remove obsolete reenable_XX calls

2018-12-27T21:48:35+00:00

reenable_fd has been a NOP since the introduction of the EPOLL based interrupt controller. reenable_channel() is no longer needed as the flow control is now handled via the write IRQs on the channel. Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

um: NULL check before kfree is not needed

2018-10-29T21:23:12+00:00

kfree(NULL) is safe,so this removes NULL check before freeing the mem Signed-off-by: YueHaibing Signed-off-by: Richard Weinberger

um: Add missing EXPORT for free_irq_by_fd()

2018-02-19T18:38:51+00:00

Fixes: ERROR: "free_irq_by_fd" [arch/um/drivers/random.ko] undefined! Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

Epoll based IRQ controller

2018-02-19T18:38:51+00:00

1. Removes the need to walk the IRQ/Device list to determine who triggered the IRQ. 2. Improves scalability (up to several times performance improvement for cases with 10s of devices). 3. Improves UML baseline IO performance for one disk + one NIC use case by up to 10%. 4. Introduces write poll triggered IRQs. 5. Prerequisite for introducing high performance mmesg family of functions in network IO. 6. Fixes RNG shutdown which was leaking a file descriptor Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

um: Remove broken SMP support

2015-04-13T19:00:58+00:00

At times where UML used the TT mode to operate it had kind of SMP support. It never got finished nor was stable. Let's rip out that cruft and stop confusing developers which do tree-wide SMP cleanups. If someone wants SMP support UML it has do be done from scratch. Signed-off-by: Richard Weinberger

um: Add irq chip um/mask handlers

2013-09-07T08:57:19+00:00

These handlers are not optional and need in our case dummy implementions to avoid NULL pointer bugs within the irq core code. Reported-and-tested-by: Toralf Foester Signed-off-by: Richard Weinberger

um: get rid of pointless include "..." where include <...> will do

2012-10-09T20:28:45+00:00

Signed-off-by: Al Viro Signed-off-by: Richard Weinberger

um: pass siginfo to guest process

2012-08-01T22:49:17+00:00

UML guest processes now get correct siginfo_t for SIGTRAP, SIGFPE, SIGILL and SIGBUS. Specifically, si_addr and si_code are now correct where previously they were si_addr = NULL and si_code = 128. Signed-off-by: Martin Pärtel Signed-off-by: Richard Weinberger

um: Remove usage of irq_chip->release()

2012-05-21T19:09:36+00:00

UML does no longer need irq_chip->release(). Signed-off-by: Richard Weinberger Reviewed-by: Thomas Gleixner