litmus-rt.git - The LITMUS^RT kernel.

Branch	Commit message	Author	Age
archive/unc-master-3.0	P-FP: fix BUG_ON releated to priority inheritance	Bjoern Brandenburg	13 years
archived-2013.1	uncachedev: mmap memory that is not cached by CPUs	Glenn Elliott	12 years
archived-private-master	Merge branch 'wip-2.6.34' into old-private-master	Andrea Bastoni	15 years
archived-semi-part	Merge branch 'wip-semi-part' of ssh://cvs/cvs/proj/litmus/repo/litmus2010 int...	Andrea Bastoni	15 years
demo	Further refinements	Jonathan Herman	14 years
ecrts-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
ecrts14-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
gpusync-rtss12	Final GPUSync implementation.	Glenn Elliott	12 years
gpusync/staging	Rename IKGLP R2DGLP.	Glenn Elliott	12 years
linux-tip	Merge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/p...	Linus Torvalds	15 years
litmus2008-patch-series	add i386 feather-trace implementation	Bjoern B. Brandenburg	16 years
master	PSN-EDF: use inferred_sporadic_job_release_at	Bjoern Brandenburg	9 years
pgm	make it compile	Glenn Elliott	12 years
prop/litmus-signals	Infrastructure for Litmus signals.	Glenn Elliott	13 years
prop/robust-tie-break	Fixed bug in edf_higher_prio().	Glenn Elliott	13 years
staging	Fix tracepoint compilation error	Felipe Cerqueira	13 years
test	9/23/2016	Namhoon Kim	9 years
tracing-devel	Test kernel tracing events capabilities	Andrea Bastoni	16 years
v2.6.34-with-arm-patches	smsc911x: Add spinlocks around registers access	Catalin Marinas	15 years
v2015.1	Add ARM syscall def for get_current_budget	Bjoern Brandenburg	10 years
wip-2011.2-bbb	Litmus core: simplify np-section protocol	Bjoern B. Brandenburg	14 years
wip-2011.2-bbb-trace	Refactor sched_trace_log_message() -> debug_trace_log_message()	Andrea Bastoni	14 years
wip-2012.3-gpu	SOBLIV draining support for C-EDF.	Glenn Elliott	12 years
wip-2012.3-gpu-preport	pick up last C-RM file	Glenn Elliott	12 years
wip-2012.3-gpu-rtss13	Fix critical bug in GPU tracker.	Glenn Elliott	12 years
wip-2012.3-gpu-sobliv-budget-w-kshark	Proper sobliv draining and many bug fixes.	Glenn Elliott	12 years
wip-aedzl-final	Make it easier to compile AEDZL interfaces in liblitmus.	Glenn Elliott	15 years
wip-aedzl-revised	Add sched_trace data for Apative EDZL	Glenn Elliott	15 years
wip-arbit-deadline	Fix compilation bug.	Glenn Elliott	13 years
wip-aux-tasks	Description of refined aux task inheritance.	Glenn Elliott	13 years
wip-bbb	GSN-EDF & Core: improve debug TRACE'ing for NP sections	Bjoern B. Brandenburg	14 years
wip-bbb-prio-don	use correct timestamp	Bjoern B. Brandenburg	14 years
wip-better-break	Implement hash-based EDF tie-breaking.	Glenn Elliott	13 years
wip-binary-heap	Make C-EDF work with simplified binheap_delete	Glenn Elliott	13 years
wip-budget	Added support for choices in budget policy enforcement.	Glenn Elliott	15 years
wip-color	Summarize schedulability with final record	Jonathan Herman	13 years
wip-color-jlh	sched_color: Fixed two bugs causing crashing on experiment restart and a rare...	Jonathan Herman	13 years
wip-d10-hz1000	Enable HZ=1000 on District 10	Bjoern B. Brandenburg	15 years
wip-default-clustering	Feature: Make default C-EDF clustering compile-time configurable.	Glenn Elliott	15 years
wip-dissipation-jerickso	Update from 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-dissipation2-jerickso	Update 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-ecrts14-pgm	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
wip-edf-hsb	last tested version	Jonathan Herman	14 years
wip-edf-os	Lookup table EDF-os	Jeremy Erickson	12 years
wip-edf-tie-break	Merge branch 'wip-edf-tie-break' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus...	Glenn Elliott	13 years
wip-edzl-critique	Use hr_timer's active checks instead of having own flag.	Glenn Elliott	15 years
wip-edzl-final	Implementation of the EDZL scheduler.	Glenn Elliott	15 years
wip-edzl-revised	Clean up comments.	Glenn Elliott	15 years
wip-events	Added support for tracing arbitrary actions.	Jonathan Herman	15 years
wip-extra-debug	DBG: add additional tracing	Bjoern B. Brandenburg	15 years
wip-fix-switch-jerickso	Attempt to fix race condition with plugin switching	Jeremy Erickson	15 years
wip-fix3	sched: show length of runqueue clock deactivation in /proc/sched_debug	Bjoern B. Brandenburg	15 years
wip-fmlp-dequeue	Improve FMLP queue management.	Glenn Elliott	14 years
wip-ft-irq-flag	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-gpu-cleanup	Enable sched_trace log injection from userspace	Glenn Elliott	13 years
wip-gpu-interrupts	Remove option for threading of all softirqs.	Glenn Elliott	14 years
wip-gpu-rtas12	Generalized GPU cost predictors + EWMA. (untested)	Glenn Elliott	13 years
wip-gpu-rtss12	Final GPUSync implementation.	Glenn Elliott	13 years
wip-gpu-rtss12-srp	experimental changes to support GPUs under SRP	Glenn Elliott	13 years
wip-gpusync-merge	Cleanup priority tracking for budget enforcement.	Glenn Elliott	11 years
wip-ikglp	Move RSM and IKGLP imp. to own .c files	Glenn Elliott	13 years
wip-k-fmlp	Merge branch 'mpi-master' into wip-k-fmlp	Glenn Elliott	14 years
wip-kernel-coloring	Added recolor syscall	Namhoon Kim	7 years
wip-kernthreads	Kludge work-queue processing into klitirqd.	Glenn Elliott	15 years
wip-klmirqd-to-aux	Allow klmirqd threads to be given names.	Glenn Elliott	13 years
wip-kshark	Merge branch 'mpi-staging' into wip-kshark	Jonathan Herman	13 years
wip-litmus-3.2	Merge commit 'v3.2' into litmus-staging	Andrea Bastoni	13 years
wip-litmus2011.2	Cleanup: Coding conformance for affinity stuff.	Glenn Elliott	14 years
wip-litmus3.0-2011.2	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-master-2.6.33-rt	Avoid deadlock when switching task policy to BACKGROUND (ugly)	Andrea Bastoni	15 years
wip-mc	Removed ARM-specific hacks which disabled less common mixed-criticality featu...	Jonathan Herman	12 years
wip-mc-bipasa	MC-EDF added	bipasa chattopadhyay	13 years
wip-mc-jerickso	Split C/D queues	Jeremy Erickson	15 years
wip-mc2-cache-slack	Manually patched mc^2 related code	Ming Yang	10 years
wip-mcrit-mac	cosmetic	Mac Mollison	15 years
wip-merge-3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-merge-v3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-migration-affinity	NULL affinity dereference in C-EDF.	Glenn Elliott	14 years
wip-mmap-uncache	share branch with others	Glenn Elliott	13 years
wip-modechange	RTSS 2017 submission	Namhoon Kim	8 years
wip-nested-locking	Appears to be working.	Bryan Ward	12 years
wip-omlp-gedf	First implementation of G-OMLP.	Glenn Elliott	15 years
wip-pai	Some cleanup of PAI	Glenn Elliott	14 years
wip-percore-lib	9/21/2016	Namhoon Kim	9 years
wip-performance	CONFIG_DONT_PREEMPT_ON_TIE: Don't preeempt a scheduled task on priority tie.	Glenn Elliott	14 years
wip-pgm	Add PGM support to C-FL	Glenn Elliott	12 years
wip-pgm-split	First draft of C-FL-split	Namhoon Kim	12 years
wip-pm-ovd	Add preemption-and-migration overhead tracing support	Andrea Bastoni	15 years
wip-prio-inh	P-EDF updated to use the generic pi framework.	Glenn Elliott	15 years
wip-prioq-dgl	BUG FIX: Support DGLs with PRIOQ_MUTEX	Glenn Elliott	13 years
wip-refactored-gedf	Generalizd architecture for GEDF-style scheduelrs to reduce code redundancy.	Glenn Elliott	15 years
wip-release-master-fix	bugfix: release master CPU must signal task was picked	Bjoern B. Brandenburg	14 years
wip-robust-tie-break	EDF priority tie-breaks.	Glenn Elliott	13 years
wip-rt-kshark	Move task time accounting into the complete_job method.	Jonathan Herman	13 years
wip-rtas12-pgm	Scheduling of PGM jobs.	Glenn Elliott	13 years
wip-semi-part	Fix compile error with newer GCC	Jeremy Erickson	12 years
wip-semi-part-edfos-jerickso	Use initial CPU set by client	Jeremy Erickson	12 years
wip-shared-lib	TODO: Fix condition checks in replicate_page_move_mapping()	Namhoon Kim	9 years
wip-shared-lib2	RTAS 2017 Submission ver.	Namhoon Kim	9 years
wip-shared-mem	Initial commit for shared library	Namhoon Kim	9 years
wip-splitting-jerickso	Fix release behavior	Jeremy Erickson	13 years
wip-splitting-omlp-jerickso	Bjoern's Dissertation Code with Priority Donation	Jeremy Erickson	13 years
wip-stage-binheap	An efficient binary heap implementation.	Glenn Elliott	13 years
wip-sun-port	Dynamic memory allocation and clean exit for FeatherTrace	Christopher Kenna	15 years
wip-timer-trace	bugfix: C-EDF, clear scheduled field of the correct CPU upon task_exit	Andrea Bastoni	15 years
wip-tracepoints	Add kernel-style events for sched_trace_XXX() functions	Andrea Bastoni	14 years

Tag	Download	Author	Age
2015.1	commit 8e51b37822...	Bjoern Brandenburg	10 years
2013.1	commit bcaacec1ca...	Glenn Elliott	12 years
2012.3	commit c158b5fbe4...	Jonathan Herman	13 years
2012.2	commit b53c479a0f...	Glenn Elliott	13 years
2012.1	commit 83b11ea1c6...	Bjoern B. Brandenburg	14 years
rtas12-mc-beta-exp	commit 8e236ee20f...	Christopher Kenna	14 years
2011.1	commit d11808b5c6...	Christopher Kenna	15 years
v2.6.37-rc4	commit e8a7e48bb2...	Linus Torvalds	15 years
v2.6.37-rc3	commit 3561d43fd2...	Linus Torvalds	15 years
v2.6.37-rc2	commit e53beacd23...	Linus Torvalds	15 years
v2.6.37-rc1	commit c8ddb2713c...	Linus Torvalds	15 years
v2.6.36	commit f6f94e2ab1...	Linus Torvalds	15 years
2010.2	commit 5c5456402d...	Bjoern B. Brandenburg	15 years
v2.6.36-rc8	commit cd07202cc8...	Linus Torvalds	15 years
v2.6.36-rc7	commit cb655d0f3d...	Linus Torvalds	15 years
v2.6.36-rc6	commit 899611ee7d...	Linus Torvalds	15 years
v2.6.36-rc5	commit b30a3f6257...	Linus Torvalds	15 years
v2.6.36-rc4	commit 49553c2ef8...	Linus Torvalds	15 years
v2.6.36-rc3	commit 2bfc96a127...	Linus Torvalds	15 years
v2.6.36-rc2	commit 76be97c1fc...	Linus Torvalds	15 years
v2.6.36-rc1	commit da5cabf80e...	Linus Torvalds	15 years
v2.6.35	commit 9fe6206f40...	Linus Torvalds	15 years
v2.6.35-rc6	commit b37fa16e78...	Linus Torvalds	15 years
v2.6.35-rc5	commit 1c5474a65b...	Linus Torvalds	15 years
v2.6.35-rc4	commit 815c4163b6...	Linus Torvalds	15 years
v2.6.35-rc3	commit 7e27d6e778...	Linus Torvalds	15 years
v2.6.35-rc2	commit e44a21b726...	Linus Torvalds	15 years
v2.6.35-rc1	commit 67a3e12b05...	Linus Torvalds	15 years
2010.1	commit 7c1ff4c544...	Andrea Bastoni	15 years
v2.6.34	commit e40152ee1e...	Linus Torvalds	15 years
v2.6.33.4	commit 4640b4e7d9...	Greg Kroah-Hartman	15 years
v2.6.34-rc7	commit b57f95a382...	Linus Torvalds	15 years
v2.6.34-rc6	commit 66f41d4c5c...	Linus Torvalds	15 years
v2.6.33.3	commit 3e7ad8ed97...	Greg Kroah-Hartman	15 years
v2.6.34-rc5	commit 01bf0b6457...	Linus Torvalds	15 years
v2.6.34-rc4	commit 0d0fb0f9c5...	Linus Torvalds	15 years
v2.6.33.2	commit 19f00f070c...	Greg Kroah-Hartman	15 years
v2.6.34-rc3	commit 2eaa9cfdf3...	Linus Torvalds	15 years
v2.6.34-rc2	commit 220bf991b0...	Linus Torvalds	15 years
v2.6.33.1	commit dbdafe5ccf...	Greg Kroah-Hartman	15 years
v2.6.34-rc1	commit 57d54889cd...	Linus Torvalds	16 years
v2.6.33	commit 60b341b778...	Linus Torvalds	16 years
v2.6.33-rc8	commit 724e6d3fe8...	Linus Torvalds	16 years
v2.6.33-rc7	commit 29275254ca...	Linus Torvalds	16 years
v2.6.33-rc6	commit abe94c756c...	Linus Torvalds	16 years
v2.6.33-rc5	commit 92dcffb916...	Linus Torvalds	16 years
v2.6.33-rc4	commit 7284ce6c9f...	Linus Torvalds	16 years
v2.6.33-rc3	commit 74d2e4f8d7...	Linus Torvalds	16 years
v2.6.33-rc2	commit 6b7b284958...	Linus Torvalds	16 years
v2.6.33-rc1	commit 55639353a0...	Linus Torvalds	16 years
v2.6.32	commit 22763c5cf3...	Linus Torvalds	16 years
v2.6.32-rc8	commit 648f4e3e50...	Linus Torvalds	16 years
v2.6.32-rc7	commit 156171c71a...	Linus Torvalds	16 years
v2.6.32-rc6	commit b419148e56...	Linus Torvalds	16 years
v2.6.32-rc5	commit 012abeea66...	Linus Torvalds	16 years
v2.6.32-rc4	commit 161291396e...	Linus Torvalds	16 years
v2.6.32-rc3	commit 374576a8b6...	Linus Torvalds	16 years
v2.6.32-rc1	commit 17d857be64...	Linus Torvalds	16 years
v2.6.32-rc2	commit 17d857be64...	Linus Torvalds	16 years
v2.6.31	commit 74fca6a428...	Linus Torvalds	16 years
v2.6.31-rc9	commit e07cccf404...	Linus Torvalds	16 years
v2.6.31-rc8	commit 326ba5010a...	Linus Torvalds	16 years
v2.6.31-rc7	commit 422bef879e...	Linus Torvalds	16 years
v2.6.31-rc6	commit 64f1607ffb...	Linus Torvalds	16 years
v2.6.31-rc5	commit ed680c4ad4...	Linus Torvalds	16 years
v2.6.31-rc4	commit 4be3bd7849...	Linus Torvalds	16 years
v2.6.31-rc3	commit 6847e154e3...	Linus Torvalds	16 years
v2.6.31-rc2	commit 8e4a718ff3...	Linus Torvalds	16 years
v2.6.31-rc1	commit 28d0325ce6...	Linus Torvalds	16 years
v2.6.30	commit 07a2039b8e...	Linus Torvalds	16 years
v2.6.30-rc8	commit 9fa7eb283c...	Linus Torvalds	16 years
v2.6.30-rc7	commit 59a3759d0f...	Linus Torvalds	16 years
v2.6.30-rc6	commit 1406de8e11...	Linus Torvalds	16 years
v2.6.30-rc5	commit 091bf7624d...	Linus Torvalds	16 years
v2.6.30-rc4	commit 091438dd56...	Linus Torvalds	16 years
v2.6.30-rc3	commit 0910697403...	Linus Torvalds	16 years
v2.6.30-rc2	commit 0882e8dd3a...	Linus Torvalds	16 years
v2.6.30-rc1	commit 577c9c456f...	Linus Torvalds	16 years
v2.6.29	commit 8e0ee43bc2...	Linus Torvalds	16 years
v2.6.29-rc8	commit 041b62374c...	Linus Torvalds	17 years
v2.6.29-rc7	commit fec6c6fec3...	Linus Torvalds	17 years
v2.6.29-rc6	commit 20f4d6c3a2...	Linus Torvalds	17 years
v2.6.29-rc5	commit d2f8d7ee1a...	Linus Torvalds	17 years
v2.6.29-rc4	commit 8e4921515c...	Linus Torvalds	17 years
v2.6.29-rc3	commit 18e352e4a7...	Linus Torvalds	17 years
v2.6.29-rc2	commit 1de9e8e70f...	Linus Torvalds	17 years
v2.6.29-rc1	commit c59765042f...	Linus Torvalds	17 years
v2.6.28	commit 4a6908a3a0...	Linus Torvalds	17 years
v2.6.28-rc9	commit 929096fe9f...	Linus Torvalds	17 years
v2.6.28-rc8	commit 8b1fae4e42...	Linus Torvalds	17 years
v2.6.28-rc7	commit 061e41fdb5...	Linus Torvalds	17 years
v2.6.28-rc6	commit 13d428afc0...	Linus Torvalds	17 years
v2.6.28-rc5	commit 9bf1a2445f...	Linus Torvalds	17 years
v2.6.28-rc4	commit f7160c7573...	Linus Torvalds	17 years
v2.6.28-rc3	commit 45beca08dd...	Linus Torvalds	17 years
v2.6.28-rc2	commit 0173a3265b...	Linus Torvalds	17 years
v2.6.28-rc1	commit 57f8f7b60d...	Linus Torvalds	17 years
v2.6.27	commit 3fa8749e58...	Linus Torvalds	17 years
v2.6.27-rc9	commit 4330ed8ed4...	Linus Torvalds	17 years
v2.6.27-rc8	commit 94aca1dac6...	Linus Torvalds	17 years
v2.6.27-rc7	commit 72d31053f6...	Linus Torvalds	17 years
v2.6.27-rc6	commit adee14b2e1...	Linus Torvalds	17 years
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v2.6.27-rc4	commit 6a55617ed5...	Linus Torvalds	17 years
v2.6.27-rc3	commit 30a2f3c60a...	Linus Torvalds	17 years
v2.6.27-rc2	commit 0967d61ea0...	Linus Torvalds	17 years
v2.6.27-rc1	commit 6e86841d05...	Linus Torvalds	17 years
v2.6.26	commit bce7f793da...	Linus Torvalds	17 years
v2.6.26-rc9	commit b7279469d6...	Linus Torvalds	17 years
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v2.6.26-rc3	commit b8291ad07a...	Linus Torvalds	17 years
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v2.6.25	commit 4b119e21d0...	Linus Torvalds	17 years
v2.6.25-rc9	commit 120dd64cac...	Linus Torvalds	17 years
v2.6.25-rc8	commit 0e81a8ae37...	Linus Torvalds	17 years
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v2.6.25-rc6	commit a978b30af3...	Linus Torvalds	17 years
v2.6.25-rc5	commit cdeeeae056...	Linus Torvalds	18 years
v2.6.25-rc4	commit 29e8c3c304...	Linus Torvalds	18 years
v2.6.25-rc3	commit bfa274e243...	Linus Torvalds	18 years
v2.6.25-rc2	commit 101142c37b...	Linus Torvalds	18 years
v2.6.25-rc1	commit 19af35546d...	Linus Torvalds	18 years
v2.6.24	commit 49914084e7...	Linus Torvalds	18 years
v2.6.24-rc8	commit cbd9c88369...	Linus Torvalds	18 years
v2.6.24-rc7	commit 3ce5445046...	Linus Torvalds	18 years
v2.6.24-rc6	commit ea67db4cdb...	Linus Torvalds	18 years
v2.6.24-rc5	commit 82d29bf6dc...	Linus Torvalds	18 years
v2.6.24-rc4	commit 09b56adc98...	Linus Torvalds	18 years
v2.6.24-rc3	commit d9f8bcbf67...	Linus Torvalds	18 years
v2.6.24-rc2	commit dbeeb816e8...	Linus Torvalds	18 years
v2.6.24-rc1	commit c9927c2bf4...	Linus Torvalds	18 years
v2.6.23	commit bbf25010f1...	Linus Torvalds	18 years
v2.6.23-rc9	commit 3146b39c18...	Linus Torvalds	18 years
v2.6.23-rc8	commit 4942de4a0e...	Linus Torvalds	18 years
v2.6.23-rc7	commit 81cfe79b9c...	Linus Torvalds	18 years
v2.6.23-rc6	commit 0d4cbb5e7f...	Linus Torvalds	18 years
v2.6.23-rc5	commit 40ffbfad6b...	Linus Torvalds	18 years
v2.6.23-rc4	commit b07d68b5ca...	Linus Torvalds	18 years
v2.6.23-rc3	commit 39d3520c92...	Linus Torvalds	18 years
v2.6.23-rc2	commit d4ac2477fa...	Linus Torvalds	18 years
v2.6.23-rc1	commit f695baf2df...	Linus Torvalds	18 years
v2.6.22	commit 7dcca30a32...	Linus Torvalds	18 years
v2.6.22-rc7	commit a38d6181ff...	Linus Torvalds	18 years
v2.6.22-rc6	commit 189548642c...	Linus Torvalds	18 years
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v2.6.22-rc4	commit 5ecd3100e6...	Linus Torvalds	18 years
v2.6.22-rc3	commit c420bc9f09...	Linus Torvalds	18 years
v2.6.22-rc2	commit 55b637c6a0...	Linus Torvalds	18 years
v2.6.22-rc1	commit 39403865d2...	Linus Torvalds	18 years
v2.6.21	commit de46c33745...	Linus Torvalds	18 years
v2.6.21-rc7	commit 94a05509a9...	Linus Torvalds	18 years
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v2.6.20	commit 62d0cfcb27...	Linus Torvalds	19 years
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v2.6.20-rc4	commit bf81b46482...	Linus Torvalds	19 years
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v2.6.19-rc6	commit 44597f65f6...	Linus Torvalds	19 years
v2.6.19-rc5	commit 80c2188127...	Linus Torvalds	19 years
v2.6.19-rc4	commit ae99a78af3...	Linus Torvalds	19 years
v2.6.19-rc3	commit 7059abedd2...	Linus Torvalds	19 years
v2.6.19-rc2	commit b4bd8c6643...	Linus Torvalds	19 years
v2.6.19-rc1	commit d223a60106...	Linus Torvalds	19 years
v2.6.18	commit e478bec0ba...	Linus Torvalds	19 years
v2.6.18-rc7	commit 95064a75eb...	Linus Torvalds	19 years
v2.6.18-rc6	commit c336923b66...	Linus Torvalds	19 years
v2.6.18-rc5	commit 60d4684068...	Linus Torvalds	19 years
v2.6.18-rc4	commit 9f737633e6...	Linus Torvalds	19 years
v2.6.18-rc3	commit b6ff50833a...	Linus Torvalds	19 years
v2.6.18-rc2	commit 82d6897fef...	Linus Torvalds	19 years
v2.6.18-rc1	commit 120bda20c6...	Linus Torvalds	19 years
v2.6.17	commit 427abfa28a...	Linus Torvalds	19 years
v2.6.17-rc6	commit 1def630a6a...	Linus Torvalds	19 years
v2.6.17-rc5	commit a8bd60705a...	Linus Torvalds	19 years
v2.6.17-rc4	commit d8c3291c73...	Linus Torvalds	19 years
v2.6.17-rc3	commit 2be4d50295...	Linus Torvalds	19 years
v2.6.17-rc2	commit 8bbde0e6d5...	Linus Torvalds	19 years
v2.6.17-rc1	commit 6246b6128b...	Linus Torvalds	19 years
v2.6.16	commit 7705a8792b...	Linus Torvalds	19 years
v2.6.16-rc6	commit 535744878e...	Linus Torvalds	20 years
v2.6.16-rc5	commit b9a33cebac...	Linus Torvalds	20 years
v2.6.16-rc4	commit bd71c2b174...	Linus Torvalds	20 years
v2.6.16-rc3	commit e9bb4c9929...	Linus Torvalds	20 years
v2.6.16-rc2	commit 826eeb53a6...	Linus Torvalds	20 years
v2.6.16-rc1	commit 2664b25051...	Linus Torvalds	20 years
v2.6.15	commit 88026842b0...	Linus Torvalds	20 years
v2.6.15-rc7	commit f89f5948fc...	Linus Torvalds	20 years
v2.6.15-rc6	commit df7addbb45...	Linus Torvalds	20 years
v2.6.15-rc5	commit 436b0f76f2...	Linus Torvalds	20 years
v2.6.15-rc4	commit 5666c0947e...	Linus Torvalds	20 years
v2.6.15-rc3	commit 624f54be20...	Linus Torvalds	20 years
v2.6.15-rc2	commit 3bedff1d73...	Linus Torvalds	20 years
v2.6.15-rc1	commit cd52d1ee9a...	Linus Torvalds	20 years
v2.6.14	commit 741b2252a5...	Linus Torvalds	20 years
v2.6.14-rc5	commit 93918e9afc...	Linus Torvalds	20 years
v2.6.14-rc4	commit 907a426179...	Linus Torvalds	20 years
v2.6.14-rc3	commit 1c9426e8a5...	Linus Torvalds	20 years
v2.6.14-rc2	commit 676d55ae30...	Linus Torvalds	20 years
v2.6.14-rc1	commit 2f4ba45a75...	Linus Torvalds	20 years
v2.6.13	commit 02b3e4e2d7...	Linus Torvalds	20 years
v2.6.13-rc7	commit 0572e3da3f...	Linus Torvalds	20 years
v2.6.13-rc6	commit 6fc32179de...	Linus Torvalds	20 years
v2.6.13-rc5	commit 9a351e30d7...	Linus Torvalds	20 years
v2.6.13-rc4	commit 6395352334...	Linus Torvalds	20 years
v2.6.11	tree c39ae07f39...
v2.6.11-tree	tree c39ae07f39...
v2.6.12	commit 9ee1c939d1...
v2.6.12-rc2	commit 1da177e4c3...
v2.6.12-rc3	commit a2755a80f4...
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v2.6.13-rc1	commit 4c91aedb75...
v2.6.13-rc2	commit a18bcb7450...
v2.6.13-rc3	commit c32511e271...

/* * Xen event channels * * Xen models interrupts with abstract event channels. Because each * domain gets 1024 event channels, but NR_IRQ is not that large, we * must dynamically map irqs<->event channels. The event channels * interface with the rest of the kernel by defining a xen interrupt * chip. When an event is received, it is mapped to an irq and sent * through the normal interrupt processing path. * * There are four kinds of events which can be mapped to an event * channel: * * 1. Inter-domain notifications. This includes all the virtual * device events, since they're driven by front-ends in another domain * (typically dom0). * 2. VIRQs, typically used for timers. These are per-cpu events. * 3. IPIs. * 4. PIRQs - Hardware interrupts. * * Jeremy Fitzhardinge <jeremy@xensource.com>, XenSource Inc, 2007 */ #include <linux/linkage.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/module.h> #include <linux/string.h> #include <linux/bootmem.h> #include <linux/slab.h> #include <linux/irqnr.h> #include <linux/pci.h> #include <asm/desc.h> #include <asm/ptrace.h> #include <asm/irq.h> #include <asm/idle.h> #include <asm/io_apic.h> #include <asm/sync_bitops.h> #include <asm/xen/pci.h> #include <asm/xen/hypercall.h> #include <asm/xen/hypervisor.h> #include <xen/xen.h> #include <xen/hvm.h> #include <xen/xen-ops.h> #include <xen/events.h> #include <xen/interface/xen.h> #include <xen/interface/event_channel.h> #include <xen/interface/hvm/hvm_op.h> #include <xen/interface/hvm/params.h> /* * This lock protects updates to the following mapping and reference-count * arrays. The lock does not need to be acquired to read the mapping tables. */ static DEFINE_SPINLOCK(irq_mapping_update_lock); static LIST_HEAD(xen_irq_list_head); /* IRQ <-> VIRQ mapping. */ static DEFINE_PER_CPU(int [NR_VIRQS], virq_to_irq) = {[0 ... NR_VIRQS-1] = -1}; /* IRQ <-> IPI mapping */ static DEFINE_PER_CPU(int [XEN_NR_IPIS], ipi_to_irq) = {[0 ... XEN_NR_IPIS-1] = -1}; /* Interrupt types. */ enum xen_irq_type { IRQT_UNBOUND = 0, IRQT_PIRQ, IRQT_VIRQ, IRQT_IPI, IRQT_EVTCHN }; /* * Packed IRQ information: * type - enum xen_irq_type * event channel - irq->event channel mapping * cpu - cpu this event channel is bound to * index - type-specific information: * PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM * guest, or GSI (real passthrough IRQ) of the device. * VIRQ - virq number * IPI - IPI vector * EVTCHN - */ struct irq_info { struct list_head list; enum xen_irq_type type; /* type */ unsigned irq; unsigned short evtchn; /* event channel */ unsigned short cpu; /* cpu bound */ union { unsigned short virq; enum ipi_vector ipi; struct { unsigned short pirq; unsigned short gsi; unsigned char vector; unsigned char flags; } pirq; } u; }; #define PIRQ_NEEDS_EOI (1 << 0) #define PIRQ_SHAREABLE (1 << 1) static int *evtchn_to_irq; static DEFINE_PER_CPU(unsigned long [NR_EVENT_CHANNELS/BITS_PER_LONG], cpu_evtchn_mask); /* Xen will never allocate port zero for any purpose. */ #define VALID_EVTCHN(chn) ((chn) != 0) static struct irq_chip xen_dynamic_chip; static struct irq_chip xen_percpu_chip; static struct irq_chip xen_pirq_chip; /* Get info for IRQ */ static struct irq_info *info_for_irq(unsigned irq) { return irq_get_handler_data(irq); } /* Constructors for packed IRQ information. */ static void xen_irq_info_common_init(struct irq_info *info, unsigned irq, enum xen_irq_type type, unsigned short evtchn, unsigned short cpu) { BUG_ON(info->type != IRQT_UNBOUND && info->type != type); info->type = type; info->irq = irq; info->evtchn = evtchn; info->cpu = cpu; evtchn_to_irq[evtchn] = irq; } static void xen_irq_info_evtchn_init(unsigned irq, unsigned short evtchn) { struct irq_info *info = info_for_irq(irq); xen_irq_info_common_init(info, irq, IRQT_EVTCHN, evtchn, 0); } static void xen_irq_info_ipi_init(unsigned cpu, unsigned irq, unsigned short evtchn, enum ipi_vector ipi) { struct irq_info *info = info_for_irq(irq); xen_irq_info_common_init(info, irq, IRQT_IPI, evtchn, 0); info->u.ipi = ipi; per_cpu(ipi_to_irq, cpu)[ipi] = irq; } static void xen_irq_info_virq_init(unsigned cpu, unsigned irq, unsigned short evtchn, unsigned short virq) { struct irq_info *info = info_for_irq(irq); xen_irq_info_common_init(info, irq, IRQT_VIRQ, evtchn, 0); info->u.virq = virq; per_cpu(virq_to_irq, cpu)[virq] = irq; } static void xen_irq_info_pirq_init(unsigned irq, unsigned short evtchn, unsigned short pirq, unsigned short gsi, unsigned short vector, unsigned char flags) { struct irq_info *info = info_for_irq(irq); xen_irq_info_common_init(info, irq, IRQT_PIRQ, evtchn, 0); info->u.pirq.pirq = pirq; info->u.pirq.gsi = gsi; info->u.pirq.vector = vector; info->u.pirq.flags = flags; } /* * Accessors for packed IRQ information. */ static unsigned int evtchn_from_irq(unsigned irq) { if (unlikely(WARN(irq < 0 || irq >= nr_irqs, "Invalid irq %d!\n", irq))) return 0; return info_for_irq(irq)->evtchn; } unsigned irq_from_evtchn(unsigned int evtchn) { return evtchn_to_irq[evtchn]; } EXPORT_SYMBOL_GPL(irq_from_evtchn); static enum ipi_vector ipi_from_irq(unsigned irq) { struct irq_info *info = info_for_irq(irq); BUG_ON(info == NULL); BUG_ON(info->type != IRQT_IPI); return info->u.ipi; } static unsigned virq_from_irq(unsigned irq) { struct irq_info *info = info_for_irq(irq); BUG_ON(info == NULL); BUG_ON(info->type != IRQT_VIRQ); return info->u.virq; } static unsigned pirq_from_irq(unsigned irq) { struct irq_info *info = info_for_irq(irq); BUG_ON(info == NULL); BUG_ON(info->type != IRQT_PIRQ); return info->u.pirq.pirq; } static enum xen_irq_type type_from_irq(unsigned irq) { return info_for_irq(irq)->type; } static unsigned cpu_from_irq(unsigned irq) { return info_for_irq(irq)->cpu; } static unsigned int cpu_from_evtchn(unsigned int evtchn) { int irq = evtchn_to_irq[evtchn]; unsigned ret = 0; if (irq != -1) ret = cpu_from_irq(irq); return ret; } static bool pirq_needs_eoi(unsigned irq) { struct irq_info *info = info_for_irq(irq); BUG_ON(info->type != IRQT_PIRQ); return info->u.pirq.flags & PIRQ_NEEDS_EOI; } static inline unsigned long active_evtchns(unsigned int cpu, struct shared_info *sh, unsigned int idx) { return (sh->evtchn_pending[idx] & per_cpu(cpu_evtchn_mask, cpu)[idx] & ~sh->evtchn_mask[idx]); } static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu) { int irq = evtchn_to_irq[chn]; BUG_ON(irq == -1); #ifdef CONFIG_SMP cpumask_copy(irq_to_desc(irq)->irq_data.affinity, cpumask_of(cpu)); #endif clear_bit(chn, per_cpu(cpu_evtchn_mask, cpu_from_irq(irq))); set_bit(chn, per_cpu(cpu_evtchn_mask, cpu)); info_for_irq(irq)->cpu = cpu; } static void init_evtchn_cpu_bindings(void) { int i; #ifdef CONFIG_SMP struct irq_info *info; /* By default all event channels notify CPU#0. */ list_for_each_entry(info, &xen_irq_list_head, list) { struct irq_desc *desc = irq_to_desc(info->irq); cpumask_copy(desc->irq_data.affinity, cpumask_of(0)); } #endif for_each_possible_cpu(i) memset(per_cpu(cpu_evtchn_mask, i), (i == 0) ? ~0 : 0, sizeof(*per_cpu(cpu_evtchn_mask, i))); } static inline void clear_evtchn(int port) { struct shared_info *s = HYPERVISOR_shared_info; sync_clear_bit(port, &s->evtchn_pending[0]); } static inline void set_evtchn(int port) { struct shared_info *s = HYPERVISOR_shared_info; sync_set_bit(port, &s->evtchn_pending[0]); } static inline int test_evtchn(int port) { struct shared_info *s = HYPERVISOR_shared_info; return sync_test_bit(port, &s->evtchn_pending[0]); } /** * notify_remote_via_irq - send event to remote end of event channel via irq * @irq: irq of event channel to send event to * * Unlike notify_remote_via_evtchn(), this is safe to use across * save/restore. Notifications on a broken connection are silently * dropped. */ void notify_remote_via_irq(int irq) { int evtchn = evtchn_from_irq(irq); if (VALID_EVTCHN(evtchn)) notify_remote_via_evtchn(evtchn); } EXPORT_SYMBOL_GPL(notify_remote_via_irq); static void mask_evtchn(int port) { struct shared_info *s = HYPERVISOR_shared_info; sync_set_bit(port, &s->evtchn_mask[0]); } static void unmask_evtchn(int port) { struct shared_info *s = HYPERVISOR_shared_info; unsigned int cpu = get_cpu(); BUG_ON(!irqs_disabled()); /* Slow path (hypercall) if this is a non-local port. */ if (unlikely(cpu != cpu_from_evtchn(port))) { struct evtchn_unmask unmask = { .port = port }; (void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask); } else { struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu); sync_clear_bit(port, &s->evtchn_mask[0]); /* * The following is basically the equivalent of * 'hw_resend_irq'. Just like a real IO-APIC we 'lose * the interrupt edge' if the channel is masked. */ if (sync_test_bit(port, &s->evtchn_pending[0]) && !sync_test_and_set_bit(port / BITS_PER_LONG, &vcpu_info->evtchn_pending_sel)) vcpu_info->evtchn_upcall_pending = 1; } put_cpu(); } static void xen_irq_init(unsigned irq) { struct irq_info *info; struct irq_desc *desc = irq_to_desc(irq); #ifdef CONFIG_SMP /* By default all event channels notify CPU#0. */ cpumask_copy(desc->irq_data.affinity, cpumask_of(0)); #endif info = kzalloc(sizeof(*info), GFP_KERNEL); if (info == NULL) panic("Unable to allocate metadata for IRQ%d\n", irq); info->type = IRQT_UNBOUND; irq_set_handler_data(irq, info); list_add_tail(&info->list, &xen_irq_list_head); } static int __must_check xen_allocate_irq_dynamic(void) { int first = 0; int irq; #ifdef CONFIG_X86_IO_APIC /* * For an HVM guest or domain 0 which see "real" (emulated or * actual respectively) GSIs we allocate dynamic IRQs * e.g. those corresponding to event channels or MSIs * etc. from the range above those "real" GSIs to avoid * collisions. */ if (xen_initial_domain() || xen_hvm_domain()) first = get_nr_irqs_gsi(); #endif irq = irq_alloc_desc_from(first, -1); xen_irq_init(irq); return irq; } static int __must_check xen_allocate_irq_gsi(unsigned gsi) { int irq; /* * A PV guest has no concept of a GSI (since it has no ACPI * nor access to/knowledge of the physical APICs). Therefore * all IRQs are dynamically allocated from the entire IRQ * space. */ if (xen_pv_domain() && !xen_initial_domain()) return xen_allocate_irq_dynamic(); /* Legacy IRQ descriptors are already allocated by the arch. */ if (gsi < NR_IRQS_LEGACY) irq = gsi; else irq = irq_alloc_desc_at(gsi, -1); xen_irq_init(irq); return irq; } static void xen_free_irq(unsigned irq) { struct irq_info *info = irq_get_handler_data(irq); list_del(&info->list); irq_set_handler_data(irq, NULL); kfree(info); /* Legacy IRQ descriptors are managed by the arch. */ if (irq < NR_IRQS_LEGACY) return; irq_free_desc(irq); } static void pirq_unmask_notify(int irq) { struct physdev_eoi eoi = { .irq = pirq_from_irq(irq) }; if (unlikely(pirq_needs_eoi(irq))) { int rc = HYPERVISOR_physdev_op(PHYSDEVOP_eoi, &eoi); WARN_ON(rc); } } static void pirq_query_unmask(int irq) { struct physdev_irq_status_query irq_status; struct irq_info *info = info_for_irq(irq); BUG_ON(info->type != IRQT_PIRQ); irq_status.irq = pirq_from_irq(irq); if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status)) irq_status.flags = 0; info->u.pirq.flags &= ~PIRQ_NEEDS_EOI; if (irq_status.flags & XENIRQSTAT_needs_eoi) info->u.pirq.flags |= PIRQ_NEEDS_EOI; } static bool probing_irq(int irq) { struct irq_desc *desc = irq_to_desc(irq); return desc && desc->action == NULL; } static unsigned int __startup_pirq(unsigned int irq) { struct evtchn_bind_pirq bind_pirq; struct irq_info *info = info_for_irq(irq); int evtchn = evtchn_from_irq(irq); int rc; BUG_ON(info->type != IRQT_PIRQ); if (VALID_EVTCHN(evtchn)) goto out; bind_pirq.pirq = pirq_from_irq(irq); /* NB. We are happy to share unless we are probing. */ bind_pirq.flags = info->u.pirq.flags & PIRQ_SHAREABLE ? BIND_PIRQ__WILL_SHARE : 0; rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_pirq, &bind_pirq); if (rc != 0) { if (!probing_irq(irq)) printk(KERN_INFO "Failed to obtain physical IRQ %d\n", irq); return 0; } evtchn = bind_pirq.port; pirq_query_unmask(irq); evtchn_to_irq[evtchn] = irq; bind_evtchn_to_cpu(evtchn, 0); info->evtchn = evtchn; out: unmask_evtchn(evtchn); pirq_unmask_notify(irq); return 0; } static unsigned int startup_pirq(struct irq_data *data) { return __startup_pirq(data->irq); } static void shutdown_pirq(struct irq_data *data) { struct evtchn_close close; unsigned int irq = data->irq; struct irq_info *info = info_for_irq(irq); int evtchn = evtchn_from_irq(irq); BUG_ON(info->type != IRQT_PIRQ); if (!VALID_EVTCHN(evtchn)) return; mask_evtchn(evtchn); close.port = evtchn; if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0) BUG(); bind_evtchn_to_cpu(evtchn, 0); evtchn_to_irq[evtchn] = -1; info->evtchn = 0; } static void enable_pirq(struct irq_data *data) { startup_pirq(data); } static void disable_pirq(struct irq_data *data) { } static void ack_pirq(struct irq_data *data) { int evtchn = evtchn_from_irq(data->irq); irq_move_irq(data); if (VALID_EVTCHN(evtchn)) { mask_evtchn(evtchn); clear_evtchn(evtchn); } } static int find_irq_by_gsi(unsigned gsi) { struct irq_info *info; list_for_each_entry(info, &xen_irq_list_head, list) { if (info->type != IRQT_PIRQ) continue; if (info->u.pirq.gsi == gsi) return info->irq; } return -1; } int xen_allocate_pirq_gsi(unsigned gsi) { return gsi; } /* * Do not make any assumptions regarding the relationship between the * IRQ number returned here and the Xen pirq argument. * * Note: We don't assign an event channel until the irq actually started * up. Return an existing irq if we've already got one for the gsi. */ int xen_bind_pirq_gsi_to_irq(unsigned gsi, unsigned pirq, int shareable, char *name) { int irq = -1; struct physdev_irq irq_op; spin_lock(&irq_mapping_update_lock); irq = find_irq_by_gsi(gsi); if (irq != -1) { printk(KERN_INFO "xen_map_pirq_gsi: returning irq %d for gsi %u\n", irq, gsi); goto out; /* XXX need refcount? */ } irq = xen_allocate_irq_gsi(gsi); if (irq < 0) goto out; irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_level_irq, name); irq_op.irq = irq; irq_op.vector = 0; /* Only the privileged domain can do this. For non-priv, the pcifront * driver provides a PCI bus that does the call to do exactly * this in the priv domain. */ if (xen_initial_domain() && HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op)) { xen_free_irq(irq); irq = -ENOSPC; goto out; } xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector, shareable ? PIRQ_SHAREABLE : 0); out: spin_unlock(&irq_mapping_update_lock); return irq; } #ifdef CONFIG_PCI_MSI int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc) { int rc; struct physdev_get_free_pirq op_get_free_pirq; op_get_free_pirq.type = MAP_PIRQ_TYPE_MSI; rc = HYPERVISOR_physdev_op(PHYSDEVOP_get_free_pirq, &op_get_free_pirq); WARN_ONCE(rc == -ENOSYS, "hypervisor does not support the PHYSDEVOP_get_free_pirq interface\n"); return rc ? -1 : op_get_free_pirq.pirq; } int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, int pirq, int vector, const char *name) { int irq, ret; spin_lock(&irq_mapping_update_lock); irq = xen_allocate_irq_dynamic(); if (irq == -1) goto out; irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_level_irq, name); xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, 0); ret = irq_set_msi_desc(irq, msidesc); if (ret < 0) goto error_irq; out: spin_unlock(&irq_mapping_update_lock); return irq; error_irq: spin_unlock(&irq_mapping_update_lock); xen_free_irq(irq); return -1; } #endif int xen_destroy_irq(int irq) { struct irq_desc *desc; struct physdev_unmap_pirq unmap_irq; struct irq_info *info = info_for_irq(irq); int rc = -ENOENT; spin_lock(&irq_mapping_update_lock); desc = irq_to_desc(irq); if (!desc) goto out; if (xen_initial_domain()) { unmap_irq.pirq = info->u.pirq.pirq; unmap_irq.domid = DOMID_SELF; rc = HYPERVISOR_physdev_op(PHYSDEVOP_unmap_pirq, &unmap_irq); if (rc) { printk(KERN_WARNING "unmap irq failed %d\n", rc); goto out; } } xen_free_irq(irq); out: spin_unlock(&irq_mapping_update_lock); return rc; } int xen_irq_from_pirq(unsigned pirq) { int irq; struct irq_info *info; spin_lock(&irq_mapping_update_lock); list_for_each_entry(info, &xen_irq_list_head, list) { if (info == NULL || info->type != IRQT_PIRQ) continue; irq = info->irq; if (info->u.pirq.pirq == pirq) goto out; } irq = -1; out: spin_unlock(&irq_mapping_update_lock); return irq; } int bind_evtchn_to_irq(unsigned int evtchn) { int irq; spin_lock(&irq_mapping_update_lock); irq = evtchn_to_irq[evtchn]; if (irq == -1) { irq = xen_allocate_irq_dynamic(); if (irq == -1) goto out; irq_set_chip_and_handler_name(irq, &xen_dynamic_chip, handle_fasteoi_irq, "event"); xen_irq_info_evtchn_init(irq, evtchn); } out: spin_unlock(&irq_mapping_update_lock); return irq; } EXPORT_SYMBOL_GPL(bind_evtchn_to_irq); static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) { struct evtchn_bind_ipi bind_ipi; int evtchn, irq; spin_lock(&irq_mapping_update_lock); irq = per_cpu(ipi_to_irq, cpu)[ipi]; if (irq == -1) { irq = xen_allocate_irq_dynamic(); if (irq < 0) goto out; irq_set_chip_and_handler_name(irq, &xen_percpu_chip, handle_percpu_irq, "ipi"); bind_ipi.vcpu = cpu; if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi, &bind_ipi) != 0) BUG(); evtchn = bind_ipi.port; xen_irq_info_ipi_init(cpu, irq, evtchn, ipi); bind_evtchn_to_cpu(evtchn, cpu); } out: spin_unlock(&irq_mapping_update_lock); return irq; } static int bind_interdomain_evtchn_to_irq(unsigned int remote_domain, unsigned int remote_port) { struct evtchn_bind_interdomain bind_interdomain; int err; bind_interdomain.remote_dom = remote_domain; bind_interdomain.remote_port = remote_port; err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain, &bind_interdomain); return err ? : bind_evtchn_to_irq(bind_interdomain.local_port); } int bind_virq_to_irq(unsigned int virq, unsigned int cpu) { struct evtchn_bind_virq bind_virq; int evtchn, irq; spin_lock(&irq_mapping_update_lock); irq = per_cpu(virq_to_irq, cpu)[virq]; if (irq == -1) { irq = xen_allocate_irq_dynamic(); if (irq == -1) goto out; irq_set_chip_and_handler_name(irq, &xen_percpu_chip, handle_percpu_irq, "virq"); bind_virq.virq = virq; bind_virq.vcpu = cpu; if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq, &bind_virq) != 0) BUG(); evtchn = bind_virq.port; xen_irq_info_virq_init(cpu, irq, evtchn, virq); bind_evtchn_to_cpu(evtchn, cpu); } out: spin_unlock(&irq_mapping_update_lock); return irq; } static void unbind_from_irq(unsigned int irq) { struct evtchn_close close; int evtchn = evtchn_from_irq(irq); spin_lock(&irq_mapping_update_lock); if (VALID_EVTCHN(evtchn)) { close.port = evtchn; if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0) BUG(); switch (type_from_irq(irq)) { case IRQT_VIRQ: per_cpu(virq_to_irq, cpu_from_evtchn(evtchn)) [virq_from_irq(irq)] = -1; break; case IRQT_IPI: per_cpu(ipi_to_irq, cpu_from_evtchn(evtchn)) [ipi_from_irq(irq)] = -1; break; default: break; } /* Closed ports are implicitly re-bound to VCPU0. */ bind_evtchn_to_cpu(evtchn, 0); evtchn_to_irq[evtchn] = -1; } BUG_ON(info_for_irq(irq)->type == IRQT_UNBOUND); xen_free_irq(irq); spin_unlock(&irq_mapping_update_lock); } int bind_evtchn_to_irqhandler(unsigned int evtchn, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) { int irq, retval; irq = bind_evtchn_to_irq(evtchn); if (irq < 0) return irq; retval = request_irq(irq, handler, irqflags, devname, dev_id); if (retval != 0) { unbind_from_irq(irq); return retval; } return irq; } EXPORT_SYMBOL_GPL(bind_evtchn_to_irqhandler); int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, unsigned int remote_port, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) { int irq, retval; irq = bind_interdomain_evtchn_to_irq(remote_domain, remote_port); if (irq < 0) return irq; retval = request_irq(irq, handler, irqflags, devname, dev_id); if (retval != 0) { unbind_from_irq(irq); return retval; } return irq; } EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irqhandler); int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) { int irq, retval; irq = bind_virq_to_irq(virq, cpu); if (irq < 0) return irq; retval = request_irq(irq, handler, irqflags, devname, dev_id); if (retval != 0) { unbind_from_irq(irq); return retval; } return irq; } EXPORT_SYMBOL_GPL(bind_virq_to_irqhandler); int bind_ipi_to_irqhandler(enum ipi_vector ipi, unsigned int cpu, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) { int irq, retval; irq = bind_ipi_to_irq(ipi, cpu); if (irq < 0) return irq; irqflags |= IRQF_NO_SUSPEND | IRQF_FORCE_RESUME; retval = request_irq(irq, handler, irqflags, devname, dev_id); if (retval != 0) { unbind_from_irq(irq); return retval; } return irq; } void unbind_from_irqhandler(unsigned int irq, void *dev_id) { free_irq(irq, dev_id); unbind_from_irq(irq); } EXPORT_SYMBOL_GPL(unbind_from_irqhandler); void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector) { int irq = per_cpu(ipi_to_irq, cpu)[vector]; BUG_ON(irq < 0); notify_remote_via_irq(irq); } irqreturn_t xen_debug_interrupt(int irq, void *dev_id) { struct shared_info *sh = HYPERVISOR_shared_info; int cpu = smp_processor_id(); unsigned long *cpu_evtchn = per_cpu(cpu_evtchn_mask, cpu); int i; unsigned long flags; static DEFINE_SPINLOCK(debug_lock); struct vcpu_info *v; spin_lock_irqsave(&debug_lock, flags); printk("\nvcpu %d\n ", cpu); for_each_online_cpu(i) { int pending; v = per_cpu(xen_vcpu, i); pending = (get_irq_regs() && i == cpu) ? xen_irqs_disabled(get_irq_regs()) : v->evtchn_upcall_mask; printk("%d: masked=%d pending=%d event_sel %0*lx\n ", i, pending, v->evtchn_upcall_pending, (int)(sizeof(v->evtchn_pending_sel)*2), v->evtchn_pending_sel); } v = per_cpu(xen_vcpu, cpu); printk("\npending:\n "); for (i = ARRAY_SIZE(sh->evtchn_pending)-1; i >= 0; i--) printk("%0*lx%s", (int)sizeof(sh->evtchn_pending[0])*2, sh->evtchn_pending[i], i % 8 == 0 ? "\n " : " "); printk("\nglobal mask:\n "); for (i = ARRAY_SIZE(sh->evtchn_mask)-1; i >= 0; i--) printk("%0*lx%s", (int)(sizeof(sh->evtchn_mask[0])*2), sh->evtchn_mask[i], i % 8 == 0 ? "\n " : " "); printk("\nglobally unmasked:\n "); for (i = ARRAY_SIZE(sh->evtchn_mask)-1; i >= 0; i--) printk("%0*lx%s", (int)(sizeof(sh->evtchn_mask[0])*2), sh->evtchn_pending[i] & ~sh->evtchn_mask[i], i % 8 == 0 ? "\n " : " "); printk("\nlocal cpu%d mask:\n ", cpu); for (i = (NR_EVENT_CHANNELS/BITS_PER_LONG)-1; i >= 0; i--) printk("%0*lx%s", (int)(sizeof(cpu_evtchn[0])*2), cpu_evtchn[i], i % 8 == 0 ? "\n " : " "); printk("\nlocally unmasked:\n "); for (i = ARRAY_SIZE(sh->evtchn_mask)-1; i >= 0; i--) { unsigned long pending = sh->evtchn_pending[i] & ~sh->evtchn_mask[i] & cpu_evtchn[i]; printk("%0*lx%s", (int)(sizeof(sh->evtchn_mask[0])*2), pending, i % 8 == 0 ? "\n " : " "); } printk("\npending list:\n"); for (i = 0; i < NR_EVENT_CHANNELS; i++) { if (sync_test_bit(i, sh->evtchn_pending)) { int word_idx = i / BITS_PER_LONG; printk(" %d: event %d -> irq %d%s%s%s\n", cpu_from_evtchn(i), i, evtchn_to_irq[i], sync_test_bit(word_idx, &v->evtchn_pending_sel) ? "" : " l2-clear", !sync_test_bit(i, sh->evtchn_mask) ? "" : " globally-masked", sync_test_bit(i, cpu_evtchn) ? "" : " locally-masked"); } } spin_unlock_irqrestore(&debug_lock, flags); return IRQ_HANDLED; } static DEFINE_PER_CPU(unsigned, xed_nesting_count); static DEFINE_PER_CPU(unsigned int, current_word_idx); static DEFINE_PER_CPU(unsigned int, current_bit_idx); /* * Mask out the i least significant bits of w */ #define MASK_LSBS(w, i) (w & ((~0UL) << i)) /* * Search the CPUs pending events bitmasks. For each one found, map * the event number to an irq, and feed it into do_IRQ() for * handling. * * Xen uses a two-level bitmap to speed searching. The first level is * a bitset of words which contain pending event bits. The second * level is a bitset of pending events themselves. */ static void __xen_evtchn_do_upcall(void) { int start_word_idx, start_bit_idx; int word_idx, bit_idx; int i; int cpu = get_cpu(); struct shared_info *s = HYPERVISOR_shared_info; struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu); unsigned count; do { unsigned long pending_words; vcpu_info->evtchn_upcall_pending = 0; if (__this_cpu_inc_return(xed_nesting_count) - 1) goto out; #ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */ /* Clear master flag /before/ clearing selector flag. */ wmb(); #endif pending_words = xchg(&vcpu_info->evtchn_pending_sel, 0); start_word_idx = __this_cpu_read(current_word_idx); start_bit_idx = __this_cpu_read(current_bit_idx); word_idx = start_word_idx; for (i = 0; pending_words != 0; i++) { unsigned long pending_bits; unsigned long words; words = MASK_LSBS(pending_words, word_idx); /* * If we masked out all events, wrap to beginning. */ if (words == 0) { word_idx = 0; bit_idx = 0; continue; } word_idx = __ffs(words); pending_bits = active_evtchns(cpu, s, word_idx); bit_idx = 0; /* usually scan entire word from start */ if (word_idx == start_word_idx) { /* We scan the starting word in two parts */ if (i == 0) /* 1st time: start in the middle */ bit_idx = start_bit_idx; else /* 2nd time: mask bits done already */ bit_idx &= (1UL << start_bit_idx) - 1; } do { unsigned long bits; int port, irq; struct irq_desc *desc; bits = MASK_LSBS(pending_bits, bit_idx); /* If we masked out all events, move on. */ if (bits == 0) break; bit_idx = __ffs(bits); /* Process port. */ port = (word_idx * BITS_PER_LONG) + bit_idx; irq = evtchn_to_irq[port]; mask_evtchn(port); clear_evtchn(port); if (irq != -1) { desc = irq_to_desc(irq); if (desc) generic_handle_irq_desc(irq, desc); } bit_idx = (bit_idx + 1) % BITS_PER_LONG; /* Next caller starts at last processed + 1 */ __this_cpu_write(current_word_idx, bit_idx ? word_idx : (word_idx+1) % BITS_PER_LONG); __this_cpu_write(current_bit_idx, bit_idx); } while (bit_idx != 0); /* Scan start_l1i twice; all others once. */ if ((word_idx != start_word_idx) || (i != 0)) pending_words &= ~(1UL << word_idx); word_idx = (word_idx + 1) % BITS_PER_LONG; } BUG_ON(!irqs_disabled()); count = __this_cpu_read(xed_nesting_count); __this_cpu_write(xed_nesting_count, 0); } while (count != 1 || vcpu_info->evtchn_upcall_pending); out: put_cpu(); } void xen_evtchn_do_upcall(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); exit_idle(); irq_enter(); __xen_evtchn_do_upcall(); irq_exit(); set_irq_regs(old_regs); } void xen_hvm_evtchn_do_upcall(void) { __xen_evtchn_do_upcall(); } EXPORT_SYMBOL_GPL(xen_hvm_evtchn_do_upcall); /* Rebind a new event channel to an existing irq. */ void rebind_evtchn_irq(int evtchn, int irq) { struct irq_info *info = info_for_irq(irq); /* Make sure the irq is masked, since the new event channel will also be masked. */ disable_irq(irq); spin_lock(&irq_mapping_update_lock); /* After resume the irq<->evtchn mappings are all cleared out */ BUG_ON(evtchn_to_irq[evtchn] != -1); /* Expect irq to have been bound before, so there should be a proper type */ BUG_ON(info->type == IRQT_UNBOUND); xen_irq_info_evtchn_init(irq, evtchn); spin_unlock(&irq_mapping_update_lock); /* new event channels are always bound to cpu 0 */ irq_set_affinity(irq, cpumask_of(0)); /* Unmask the event channel. */ enable_irq(irq); } /* Rebind an evtchn so that it gets delivered to a specific cpu */ static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu) { struct evtchn_bind_vcpu bind_vcpu; int evtchn = evtchn_from_irq(irq); if (!VALID_EVTCHN(evtchn)) return -1; /* * Events delivered via platform PCI interrupts are always * routed to vcpu 0 and hence cannot be rebound. */ if (xen_hvm_domain() && !xen_have_vector_callback) return -1; /* Send future instances of this interrupt to other vcpu. */ bind_vcpu.port = evtchn; bind_vcpu.vcpu = tcpu; /* * If this fails, it usually just indicates that we're dealing with a * virq or IPI channel, which don't actually need to be rebound. Ignore * it, but don't do the xenlinux-level rebind in that case. */ if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_vcpu, &bind_vcpu) >= 0) bind_evtchn_to_cpu(evtchn, tcpu); return 0; } static int set_affinity_irq(struct irq_data *data, const struct cpumask *dest, bool force) { unsigned tcpu = cpumask_first(dest); return rebind_irq_to_cpu(data->irq, tcpu); } int resend_irq_on_evtchn(unsigned int irq) { int masked, evtchn = evtchn_from_irq(irq); struct shared_info *s = HYPERVISOR_shared_info; if (!VALID_EVTCHN(evtchn)) return 1; masked = sync_test_and_set_bit(evtchn, s->evtchn_mask); sync_set_bit(evtchn, s->evtchn_pending); if (!masked) unmask_evtchn(evtchn); return 1; } static void enable_dynirq(struct irq_data *data) { int evtchn = evtchn_from_irq(data->irq); if (VALID_EVTCHN(evtchn)) unmask_evtchn(evtchn); } static void disable_dynirq(struct irq_data *data) { int evtchn = evtchn_from_irq(data->irq); if (VALID_EVTCHN(evtchn)) mask_evtchn(evtchn); } static void ack_dynirq(struct irq_data *data) { int evtchn = evtchn_from_irq(data->irq); irq_move_masked_irq(data); if (VALID_EVTCHN(evtchn)) unmask_evtchn(evtchn); } static int retrigger_dynirq(struct irq_data *data) { int evtchn = evtchn_from_irq(data->irq); struct shared_info *sh = HYPERVISOR_shared_info; int ret = 0; if (VALID_EVTCHN(evtchn)) { int masked; masked = sync_test_and_set_bit(evtchn, sh->evtchn_mask); sync_set_bit(evtchn, sh->evtchn_pending); if (!masked) unmask_evtchn(evtchn); ret = 1; } return ret; } static void restore_pirqs(void) { int pirq, rc, irq, gsi; struct physdev_map_pirq map_irq; struct irq_info *info; list_for_each_entry(info, &xen_irq_list_head, list) { if (info->type != IRQT_PIRQ) continue; pirq = info->u.pirq.pirq; gsi = info->u.pirq.gsi; irq = info->irq; /* save/restore of PT devices doesn't work, so at this point the * only devices present are GSI based emulated devices */ if (!gsi) continue; map_irq.domid = DOMID_SELF; map_irq.type = MAP_PIRQ_TYPE_GSI; map_irq.index = gsi; map_irq.pirq = pirq; rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq); if (rc) { printk(KERN_WARNING "xen map irq failed gsi=%d irq=%d pirq=%d rc=%d\n", gsi, irq, pirq, rc); xen_free_irq(irq); continue; } printk(KERN_DEBUG "xen: --> irq=%d, pirq=%d\n", irq, map_irq.pirq); __startup_pirq(irq); } } static void restore_cpu_virqs(unsigned int cpu) { struct evtchn_bind_virq bind_virq; int virq, irq, evtchn; for (virq = 0; virq < NR_VIRQS; virq++) { if ((irq = per_cpu(virq_to_irq, cpu)[virq]) == -1) continue; BUG_ON(virq_from_irq(irq) != virq); /* Get a new binding from Xen. */ bind_virq.virq = virq; bind_virq.vcpu = cpu; if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq, &bind_virq) != 0) BUG(); evtchn = bind_virq.port; /* Record the new mapping. */ xen_irq_info_virq_init(cpu, irq, evtchn, virq); bind_evtchn_to_cpu(evtchn, cpu); } } static void restore_cpu_ipis(unsigned int cpu) { struct evtchn_bind_ipi bind_ipi; int ipi, irq, evtchn; for (ipi = 0; ipi < XEN_NR_IPIS; ipi++) { if ((irq = per_cpu(ipi_to_irq, cpu)[ipi]) == -1) continue; BUG_ON(ipi_from_irq(irq) != ipi); /* Get a new binding from Xen. */ bind_ipi.vcpu = cpu; if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi, &bind_ipi) != 0) BUG(); evtchn = bind_ipi.port; /* Record the new mapping. */ xen_irq_info_ipi_init(cpu, irq, evtchn, ipi); bind_evtchn_to_cpu(evtchn, cpu); } } /* Clear an irq's pending state, in preparation for polling on it */ void xen_clear_irq_pending(int irq) { int evtchn = evtchn_from_irq(irq); if (VALID_EVTCHN(evtchn)) clear_evtchn(evtchn); } EXPORT_SYMBOL(xen_clear_irq_pending); void xen_set_irq_pending(int irq) { int evtchn = evtchn_from_irq(irq); if (VALID_EVTCHN(evtchn)) set_evtchn(evtchn); } bool xen_test_irq_pending(int irq) { int evtchn = evtchn_from_irq(irq); bool ret = false; if (VALID_EVTCHN(evtchn)) ret = test_evtchn(evtchn); return ret; } /* Poll waiting for an irq to become pending with timeout. In the usual case, * the irq will be disabled so it won't deliver an interrupt. */ void xen_poll_irq_timeout(int irq, u64 timeout) { evtchn_port_t evtchn = evtchn_from_irq(irq); if (VALID_EVTCHN(evtchn)) { struct sched_poll poll; poll.nr_ports = 1; poll.timeout = timeout; set_xen_guest_handle(poll.ports, &evtchn); if (HYPERVISOR_sched_op(SCHEDOP_poll, &poll) != 0) BUG(); } } EXPORT_SYMBOL(xen_poll_irq_timeout); /* Poll waiting for an irq to become pending. In the usual case, the * irq will be disabled so it won't deliver an interrupt. */ void xen_poll_irq(int irq) { xen_poll_irq_timeout(irq, 0 /* no timeout */); } void xen_irq_resume(void) { unsigned int cpu, evtchn; struct irq_info *info; init_evtchn_cpu_bindings(); /* New event-channel space is not 'live' yet. */ for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++) mask_evtchn(evtchn); /* No IRQ <-> event-channel mappings. */ list_for_each_entry(info, &xen_irq_list_head, list) info->evtchn = 0; /* zap event-channel binding */ for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++) evtchn_to_irq[evtchn] = -1; for_each_possible_cpu(cpu) { restore_cpu_virqs(cpu); restore_cpu_ipis(cpu); } restore_pirqs(); }