Andrew Turner 17fb49c1e4 An IPI must be cleared before it is handled otherwise next IPI could be ... missed. In other words, if a new request for an IPI is sent while the previous request is being handled but the IPI is not cleared yet, the clearing of the previous IPI request also clears the new one and the handling is missed. There are only three MP interrupt controllers in ARM now. Two of them are fixed by this change, the third one is correct, probably only just by accident. The fix is minimalistic as new interrupt framework is awaited. It was debugged on RPi2 where missing IPI handling together with SCHED_ULE led to situation in which tdq_ipipending was not cleared and so IPI_PREEMPT was stopped to be sent. Various odditys were found related to slow system response time like various events timed out, and slow console response. Submitted by: Svatopluk Kraus <onwahe@gmail.com> Reviewed by: loos, kib MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D3722		2015-10-01 12:09:05 +00:00
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allwinner	Add the A20 glue code for if_dwc.	2015-09-21 01:51:37 +00:00
altera/socfpga	Add alternate descriptors support for if_dwc.	2015-09-20 14:13:29 +00:00
amlogic/aml8726	Add alternate descriptors support for if_dwc.	2015-09-20 14:13:29 +00:00
annapurna/alpine	Remove obsolete vendor code from Alpine platform support	2015-07-30 13:45:34 +00:00
arm	Exploit r288122 to address a cosmetic issue. Since PV chunk pages don't	2015-09-26 07:18:05 +00:00
at91	Make kstack_pages a tunable on arm, x86, and powepc. On i386, the	2015-08-10 17:18:21 +00:00
broadcom/bcm2835	An IPI must be cleared before it is handled otherwise next IPI could be	2015-10-01 12:09:05 +00:00
cavium/cns11xx	Make kstack_pages a tunable on arm, x86, and powepc. On i386, the	2015-08-10 17:18:21 +00:00
conf	Enable if_dwc for Allwinner A20 based boards.	2015-09-21 03:17:41 +00:00
freescale	Make the imx watchdog actually work, by setting WDOG_CR_WDE (enable bit).	2015-08-19 20:50:31 +00:00
include	Typo.	2015-08-20 13:37:08 +00:00
lpc	Build the cpufunc_asm_* files based on the cpu type, not which config file	2015-03-29 22:43:39 +00:00
mv	An IPI must be cleared before it is handled otherwise next IPI could be	2015-10-01 12:09:05 +00:00
qemu	Enable SMP on the qemu virt platform. We use the device tree to find which	2015-05-24 12:33:12 +00:00
rockchip	Use the new gic option on all configs that need it.	2015-05-10 12:13:27 +00:00
samsung	Make kstack_pages a tunable on arm, x86, and powepc. On i386, the	2015-08-10 17:18:21 +00:00
ti	Add a new PPS driver for AM335x (beaglebone) timer hardware. This can be	2015-08-13 15:19:30 +00:00
versatile	Add domain support to PCI bus allocation	2015-09-16 23:34:51 +00:00
xilinx	Use the new gic option on all configs that need it.	2015-05-10 12:13:27 +00:00
xscale	Add domain support to PCI bus allocation	2015-09-16 23:34:51 +00:00