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76acc41fb7
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Justin T. Gibbs 76acc41fb7 Implement vector callback for PVHVM and unify event channel implementations 
Re-structure Xen HVM support so that:
	- Xen is detected and hypercalls can be performed very
	  early in system startup.
	- Xen interrupt services are implemented using FreeBSD's native
	  interrupt delivery infrastructure.
	- the Xen interrupt service implementation is shared between PV
	  and HVM guests.
	- Xen interrupt handlers can optionally use a filter handler
	  in order to avoid the overhead of dispatch to an interrupt
	  thread.
	- interrupt load can be distributed among all available CPUs.
	- the overhead of accessing the emulated local and I/O apics
	  on HVM is removed for event channel port events.
	- a similar optimization can eventually, and fairly easily,
	  be used to optimize MSI.

Early Xen detection, HVM refactoring, PVHVM interrupt infrastructure,
and misc Xen cleanups:

Sponsored by: Spectra Logic Corporation

Unification of PV & HVM interrupt infrastructure, bug fixes,
and misc Xen cleanups:

Submitted by: Roger Pau Monné
Sponsored by: Citrix Systems R&D

sys/x86/x86/local_apic.c:
sys/amd64/include/apicvar.h:
sys/i386/include/apicvar.h:
sys/amd64/amd64/apic_vector.S:
sys/i386/i386/apic_vector.s:
sys/amd64/amd64/machdep.c:
sys/i386/i386/machdep.c:
sys/i386/xen/exception.s:
sys/x86/include/segments.h:
	Reserve IDT vector 0x93 for the Xen event channel upcall
	interrupt handler.  On Hypervisors that support the direct
	vector callback feature, we can request that this vector be
	called directly by an injected HVM interrupt event, instead
	of a simulated PCI interrupt on the Xen platform PCI device.
	This avoids all of the overhead of dealing with the emulated
	I/O APIC and local APIC.  It also means that the Hypervisor
	can inject these events on any CPU, allowing upcalls for
	different ports to be handled in parallel.

sys/amd64/amd64/mp_machdep.c:
sys/i386/i386/mp_machdep.c:
	Map Xen per-vcpu area during AP startup.

sys/amd64/include/intr_machdep.h:
sys/i386/include/intr_machdep.h:
	Increase the FreeBSD IRQ vector table to include space
	for event channel interrupt sources.

sys/amd64/include/pcpu.h:
sys/i386/include/pcpu.h:
	Remove Xen HVM per-cpu variable data.  These fields are now
	allocated via the dynamic per-cpu scheme.  See xen_intr.c
	for details.

sys/amd64/include/xen/hypercall.h:
sys/dev/xen/blkback/blkback.c:
sys/i386/include/xen/xenvar.h:
sys/i386/xen/clock.c:
sys/i386/xen/xen_machdep.c:
sys/xen/gnttab.c:
	Prefer FreeBSD primatives to Linux ones in Xen support code.

sys/amd64/include/xen/xen-os.h:
sys/i386/include/xen/xen-os.h:
sys/xen/xen-os.h:
sys/dev/xen/balloon/balloon.c:
sys/dev/xen/blkback/blkback.c:
sys/dev/xen/blkfront/blkfront.c:
sys/dev/xen/console/xencons_ring.c:
sys/dev/xen/control/control.c:
sys/dev/xen/netback/netback.c:
sys/dev/xen/netfront/netfront.c:
sys/dev/xen/xenpci/xenpci.c:
sys/i386/i386/machdep.c:
sys/i386/include/pmap.h:
sys/i386/include/xen/xenfunc.h:
sys/i386/isa/npx.c:
sys/i386/xen/clock.c:
sys/i386/xen/mp_machdep.c:
sys/i386/xen/mptable.c:
sys/i386/xen/xen_clock_util.c:
sys/i386/xen/xen_machdep.c:
sys/i386/xen/xen_rtc.c:
sys/xen/evtchn/evtchn_dev.c:
sys/xen/features.c:
sys/xen/gnttab.c:
sys/xen/gnttab.h:
sys/xen/hvm.h:
sys/xen/xenbus/xenbus.c:
sys/xen/xenbus/xenbus_if.m:
sys/xen/xenbus/xenbusb_front.c:
sys/xen/xenbus/xenbusvar.h:
sys/xen/xenstore/xenstore.c:
sys/xen/xenstore/xenstore_dev.c:
sys/xen/xenstore/xenstorevar.h:
	Pull common Xen OS support functions/settings into xen/xen-os.h.

sys/amd64/include/xen/xen-os.h:
sys/i386/include/xen/xen-os.h:
sys/xen/xen-os.h:
	Remove constants, macros, and functions unused in FreeBSD's Xen
	support.

sys/xen/xen-os.h:
sys/i386/xen/xen_machdep.c:
sys/x86/xen/hvm.c:
	Introduce new functions xen_domain(), xen_pv_domain(), and
	xen_hvm_domain().  These are used in favor of #ifdefs so that
	FreeBSD can dynamically detect and adapt to the presence of
	a hypervisor.  The goal is to have an HVM optimized GENERIC,
	but more is necessary before this is possible.

sys/amd64/amd64/machdep.c:
sys/dev/xen/xenpci/xenpcivar.h:
sys/dev/xen/xenpci/xenpci.c:
sys/x86/xen/hvm.c:
sys/sys/kernel.h:
	Refactor magic ioport, Hypercall table and Hypervisor shared
	information page setup, and move it to a dedicated HVM support
	module.

	HVM mode initialization is now triggered during the
	SI_SUB_HYPERVISOR phase of system startup.  This currently
	occurs just after the kernel VM is fully setup which is
	just enough infrastructure to allow the hypercall table
	and shared info page to be properly mapped.

sys/xen/hvm.h:
sys/x86/xen/hvm.c:
	Add definitions and a method for configuring Hypervisor event
	delievery via a direct vector callback.

sys/amd64/include/xen/xen-os.h:
sys/x86/xen/hvm.c:

sys/conf/files:
sys/conf/files.amd64:
sys/conf/files.i386:
	Adjust kernel build to reflect the refactoring of early
	Xen startup code and Xen interrupt services.

sys/dev/xen/blkback/blkback.c:
sys/dev/xen/blkfront/blkfront.c:
sys/dev/xen/blkfront/block.h:
sys/dev/xen/control/control.c:
sys/dev/xen/evtchn/evtchn_dev.c:
sys/dev/xen/netback/netback.c:
sys/dev/xen/netfront/netfront.c:
sys/xen/xenstore/xenstore.c:
sys/xen/evtchn/evtchn_dev.c:
sys/dev/xen/console/console.c:
sys/dev/xen/console/xencons_ring.c
	Adjust drivers to use new xen_intr_*() API.

sys/dev/xen/blkback/blkback.c:
	Since blkback defers all event handling to a taskqueue,
	convert this task queue to a "fast" taskqueue, and schedule
	it via an interrupt filter.  This avoids an unnecessary
	ithread context switch.

sys/xen/xenstore/xenstore.c:
	The xenstore driver is MPSAFE.  Indicate as much when
	registering its interrupt handler.

sys/xen/xenbus/xenbus.c:
sys/xen/xenbus/xenbusvar.h:
	Remove unused event channel APIs.

sys/xen/evtchn.h:
	Remove all kernel Xen interrupt service API definitions
	from this file.  It is now only used for structure and
	ioctl definitions related to the event channel userland
	device driver.

	Update the definitions in this file to match those from
	NetBSD.  Implementing this interface will be necessary for
	Dom0 support.

sys/xen/evtchn/evtchnvar.h:
	Add a header file for implemenation internal APIs related
	to managing event channels event delivery.  This is used
	to allow, for example, the event channel userland device
	driver to access low-level routines that typical kernel
	consumers of event channel services should never access.

sys/xen/interface/event_channel.h:
sys/xen/xen_intr.h:
	Standardize on the evtchn_port_t type for referring to
	an event channel port id.  In order to prevent low-level
	event channel APIs from leaking to kernel consumers who
	should not have access to this data, the type is defined
	twice: Once in the Xen provided event_channel.h, and again
	in xen/xen_intr.h.  The double declaration is protected by
	__XEN_EVTCHN_PORT_DEFINED__ to ensure it is never declared
	twice within a given compilation unit.

sys/xen/xen_intr.h:
sys/xen/evtchn/evtchn.c:
sys/x86/xen/xen_intr.c:
sys/dev/xen/xenpci/evtchn.c:
sys/dev/xen/xenpci/xenpcivar.h:
	New implementation of Xen interrupt services.  This is
	similar in many respects to the i386 PV implementation with
	the exception that events for bound to event channel ports
	(i.e. not IPI, virtual IRQ, or physical IRQ) are further
	optimized to avoid mask/unmask operations that aren't
	necessary for these edge triggered events.

	Stubs exist for supporting physical IRQ binding, but will
	need additional work before this implementation can be
	fully shared between PV and HVM.

sys/amd64/amd64/mp_machdep.c:
sys/i386/i386/mp_machdep.c:
sys/i386/xen/mp_machdep.c
sys/x86/xen/hvm.c:
	Add support for placing vcpu_info into an arbritary memory
	page instead of using HYPERVISOR_shared_info->vcpu_info.
	This allows the creation of domains with more than 32 vcpus.

sys/i386/i386/machdep.c:
sys/i386/xen/clock.c:
sys/i386/xen/xen_machdep.c:
sys/i386/xen/exception.s:
	Add support for new event channle implementation.
2013-08-29 19:52:18 +00:00
..
files Implement vector callback for PVHVM and unify event channel implementations 2013-08-29 19:52:18 +00:00
files.amd64 Implement vector callback for PVHVM and unify event channel implementations 2013-08-29 19:52:18 +00:00
files.arm Rename device vfp to option VFP and retire the ARM_VFP_SUPPORT option. This 2013-08-17 18:51:38 +00:00
files.i386 Implement vector callback for PVHVM and unify event channel implementations 2013-08-29 19:52:18 +00:00
files.ia64 - Trim an unused and bogus Makefile for mount_smbfs. 2013-06-28 21:00:08 +00:00
files.mips - Trim an unused and bogus Makefile for mount_smbfs. 2013-06-28 21:00:08 +00:00
files.pc98 - Trim an unused and bogus Makefile for mount_smbfs. 2013-06-28 21:00:08 +00:00
files.powerpc - Trim an unused and bogus Makefile for mount_smbfs. 2013-06-28 21:00:08 +00:00
files.sparc64 - Trim an unused and bogus Makefile for mount_smbfs. 2013-06-28 21:00:08 +00:00
kern.mk Spell extensions correctly. 2013-05-20 19:41:34 +00:00
kern.post.mk Some objects - such as *_genassym.o are not hooked into 2013-08-14 22:19:29 +00:00
kern.pre.mk opensolaris code: translate INVARIANTS to DEBUG and ZFS_DEBUG 2013-08-06 15:51:56 +00:00
kmod_syms.awk
kmod.mk amd64: use -mno-omit-leaf-frame-pointer in addition to -fno-omit-frame-pointer 2013-07-09 08:42:02 +00:00
ldscript.amd64
ldscript.arm Correctly align the unwind tables. Without this clang may incorrectly align 2013-03-10 00:47:19 +00:00
ldscript.i386
ldscript.ia64
ldscript.mips
ldscript.mips.cfe
ldscript.mips.mips64
ldscript.mips.octeon1
ldscript.powerpc
ldscript.powerpc64 Add the .opd section, this is helps booting a profiled kernel. 2012-01-20 18:52:31 +00:00
ldscript.sparc64
Makefile.amd64 Assemble linux32_locore.s and ia32_sigtramp.S with clang integrated assembler. 2013-08-27 18:35:04 +00:00
Makefile.arm 2 years, 10 months, 22 days after the projects/arm_eabi branch was created 2013-07-16 19:15:19 +00:00
Makefile.i386 Add basic support for FDT to i386 & amd64. This change includes: 2013-05-21 03:05:49 +00:00
Makefile.ia64
Makefile.mips Fill out fake preload structure to let userland tools like pmc(3) know 2012-03-15 05:29:51 +00:00
Makefile.pc98 MFi386: r232263 2012-11-10 14:56:35 +00:00
Makefile.powerpc Remove duplication and centralize testing of various config(8)ed features. 2012-09-12 14:19:40 +00:00
Makefile.sparc64
makeLINT.mk Generate a LINT for powerpc and for powerpc64. 2013-04-11 22:18:20 +00:00
makeLINT.sed
newvers.sh Use realpath(1) to determine the location of the newvers.sh script, 2013-08-11 13:57:14 +00:00
NOTES Allow UART_POLL_FREQ to be set as a kernel option as well as via tunable 2013-08-19 15:51:30 +00:00
options Allow UART_POLL_FREQ to be set as a kernel option as well as via tunable 2013-08-19 15:51:30 +00:00
options.amd64 The PADLOCK_RNG and RDRAND_RNG kernel options are now devices. 2013-08-21 22:43:29 +00:00
options.arm Rename device vfp to option VFP and retire the ARM_VFP_SUPPORT option. This 2013-08-17 18:51:38 +00:00
options.i386 The PADLOCK_RNG and RDRAND_RNG kernel options are now devices. 2013-08-21 22:43:29 +00:00
options.ia64 Port the new PV entry allocator from amd64/i386. This allocator has two 2012-10-26 03:02:39 +00:00
options.mips Add an option for the GE FES based packet engines. Its board IDs 2013-04-23 09:40:42 +00:00
options.pc98
options.powerpc Initial support for running FreeBSD on the Nintendo Wii. We're able to 2012-08-21 06:31:26 +00:00
options.sparc64 - While Netra X1 generally show no ill effects when registering a power 2013-03-02 00:37:31 +00:00
systags.sh
WITHOUT_SOURCELESS Move WITHOUT_SOURCELESS_* files to sys/conf/ in order to avoid "universe" 2012-02-12 14:55:27 +00:00
WITHOUT_SOURCELESS_HOST Import HighPoint DC Series Data Center HBA (DC7280 and R750) driver. 2013-07-06 07:49:41 +00:00
WITHOUT_SOURCELESS_UCODE Import OpenBSD's rsu(4) WLAN driver. 2013-07-30 02:07:57 +00:00