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* machine/stdarg.h -> sys/stdarg.hBrooks Davis2025-06-111-2/+1
| | | | | | | | | | | | | Switch to using sys/stdarg.h for va_list type and va_* builtins. Make an attempt to insert the include in a sensible place. Where style(9) was followed this is easy, where it was ignored, aim for the first block of sys/*.h headers and don't get too fussy or try to fix other style bugs. Reviewed by: imp Exp-run by: antoine (PR 286274) Pull Request: https://github.com/freebsd/freebsd-src/pull/1595
* x86/xen: introduce non-hypercall based emergency printRoger Pau Monné2024-02-221-5/+10
| | | | | | | | | | | | | | | | | | | | | The current xc_printf() function uses an hypercall in order to send character buffers to the hypervisor for it to print on the hypervisor console (if the hypervisor is configured to print such messages). This requires the hypercall page to be initialized, which is extra work and can go wrong. On x86 instead of using the console IO hypercall use the debug console IO port, also called "port E9 hack". This allows sending characters to Xen using an outb instruction, without any initialization required. Keep the previous hypervisor based implementation by using the weak attribute, which allows each architecture to provide an alternate (arch-specific) implementation. Sponsored by: Cloud Software Group Reviewed by: markj Differential revision: https://reviews.freebsd.org/D43929
* sys: Automated cleanup of cdefs and other formattingWarner Losh2023-11-271-1/+0
| | | | | | | | | | | | | | | | Apply the following automated changes to try to eliminate no-longer-needed sys/cdefs.h includes as well as now-empty blank lines in a row. Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/ Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/ Remove /\n+#if.*\n#endif.*\n+/ Remove /^#if.*\n#endif.*\n/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/ Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/ Sponsored by: Netflix
* sys: Remove $FreeBSD$: one-line .c patternWarner Losh2023-08-161-2/+0
| | | | Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
* xen: Remove unused devclass arguments to DRIVER_MODULE.John Baldwin2022-05-061-3/+1
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* xen: switch to use headers in contribElliott Mitchell2022-02-071-1/+1
| | | | | | | | | | These headers originate with the Xen project and shouldn't be mixed with the main portion of the FreeBSD kernel. Notably they shouldn't be the target of clean-up commits. Switch to use the headers in sys/contrib/xen. Reviewed by: royger
* xen: plug some of set-but-not-used varsMateusz Guzik2021-12-151-1/+1
| | | | Sponsored by: Rubicon Communications, LLC ("Netgate")
* xen: create VM_MEMATTR_XEN for Xen memory mappingsElliott Mitchell2021-07-281-1/+1
| | | | | | | | | | | | | | The requirements for pages shared with Xen/other VMs may vary from architecture to architecture. As such create a macro which various architectures can use. Remove a use of PAT_WRITE_BACK in xenstore.c. This is a x86-ism which shouldn't have been present in a common area. Original idea: Julien Grall <julien@xen.org>, 2014-01-14 06:44:08 Approach suggested by: royger Reviewed by: royger, mhorne Differential Revision: https://reviews.freebsd.org/D29351
* xen: remove x86-ism from Xen common codeElliott Mitchell2021-03-011-1/+1
| | | | | | | | PAT_WRITE_BACK is x86-only, whereas sys/dev/xen could be shared between multiple architectures. Reviewed by: royger Differential Revision: https://reviews.freebsd.org/D28831
* tty: convert tty_lock_assert to tty_assert_locked to hide lock typeKyle Evans2020-04-171-1/+1
| | | | | | | | | | | | | | | | | A later change, currently being iterated on in D24459, will in-fact change the lock type to an sx so that TTY drivers can sleep on it if they need to. Committing this ahead of time to make the review in question a little more palatable. tty_lock_assert() is unfortunately still needed for now in two places to make sure that the tty lock has not been recursed upon, for those scenarios where it's supplied by the TTY driver and possibly a mutex that is allowed to recurse. Suggested by: markj Notes: svn path=/head/; revision=360051
* xen/console: fix priority of Xen consoleRoger Pau Monné2020-02-061-1/+2
| | | | | | | | | | | | | | | | | | Currently the Xen console is always attached with priority CN_REMOTE (highest), which means that when booting with a single console the Xen console will take preference over the VGA for example, and that's not intended unless the user has also selected to use a serial console. Fix this by lowering the priority of the Xen console to NORMAL unless the user has selected to use a serial console. This keeps the usual FreeBSD behavior of outputting to the internal consoles (ie: VGA) when booted as a Xen dom0. MFC after: 3 days Sponsored by: Citrix Systems R&D Notes: svn path=/head/; revision=357616
* Add KERNEL_PANICKED macro for use in place of direct panicstr testsMateusz Guzik2020-01-121-2/+2
| | | | Notes: svn path=/head/; revision=356655
* Extract eventfilter declarations to sys/_eventfilter.hConrad Meyer2019-05-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | This allows replacing "sys/eventfilter.h" includes with "sys/_eventfilter.h" in other header files (e.g., sys/{bus,conf,cpu}.h) and reduces header pollution substantially. EVENTHANDLER_DECLARE and EVENTHANDLER_LIST_DECLAREs were moved out of .c files into appropriate headers (e.g., sys/proc.h, powernv/opal.h). As a side effect of reduced header pollution, many .c files and headers no longer contain needed definitions. The remainder of the patch addresses adding appropriate includes to fix those files. LOCK_DEBUG and LOCK_FILE_LINE_ARG are moved to sys/_lock.h, as required by sys/mutex.h since r326106 (but silently protected by header pollution prior to this change). No functional change (intended). Of course, any out of tree modules that relied on header pollution for sys/eventhandler.h, sys/lock.h, or sys/mutex.h inclusion need to be fixed. __FreeBSD_version has been bumped. Notes: svn path=/head/; revision=347984
* xen: do not limit PV console usage to PV guestsRoger Pau Monné2018-07-191-8/+3
| | | | | | | | | | The Xen PV console is also available to HVM and PVHv2 guests, so don't limit the console usage to PV guests only. Sponsored by: Citrix Systems R&D Notes: svn path=/head/; revision=336471
* xen: remove direct usage of HYPERVISOR_start_infoRoger Pau Monné2018-07-191-9/+6
| | | | | | | | | | | | | | | | | | | HYPERVISOR_start_info is only available to PV and PVHv1 guests, HVM and PVHv2 guests get this data from HVM parameters that are fetched using a hypercall. Instead provide a set of helper functions that should be used to fetch this data. The helper functions have different implementations depending on whether FreeBSD is running as PVHv1 or HVM/PVHv2 guest type. This helps to cleanup generic Xen code by removing quite a lot of xen_pv_domain and xen_hvm_domain macro usages. Sponsored by: Citrix Systems R&D Notes: svn path=/head/; revision=336470
* xen/console: Introduce a new console driver for Xen guestRoger Pau Monné2015-10-084-744/+797
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current Xen console driver is crashing very quickly when using it on an ARM guest. This is because the console lock is recursive and it may lead to recursion on the tty lock and/or corrupt the ring pointer. Furthermore, the console lock is not always taken where it should be and has to be released too early because of the way the console has been designed. Over the years, code has been modified to support various new features but the driver has not been reworked. This new driver has been rewritten with the idea of only having a small set of specific function to write either via the shared ring or the hypercall interface. Note that HVM support has been left aside for now because it requires additional features which are not yet supported. A follow-up patch will be sent with HVM guest support. List of items that may be good to have but not mandatory: - Avoid to flush for each character written when using the tty - Support multiple consoles Submitted by: Julien Grall <julien.grall@citrix.com> Reviewed by: royger Differential Revision: https://reviews.freebsd.org/D3698 Sponsored by: Citrix Systems R&D Notes: svn path=/head/; revision=289033
* xen: Dom0 console fixesRoger Pau Monné2014-08-041-0/+26
| | | | | | | | | | | | | | | | | Minor fixes to make the Xen Dom0 console work. This includes always returning there's pending input in xencons_has_input, because on Dom0 there's no shared ring and we cannot test the indexes. The second fix is to use the CONSOLEIO_read hypercall in order to read input data from the Xen console. Sponsored by: Citrix Systems R&D dev/xen/console/xencons_ring.c: - Always return true in xencons_has_input for Dom0. - Implement Dom0 console support for xencons_handle_input. Notes: svn path=/head/; revision=269514
* xen: introduce xenpv busRoger Pau Monné2014-06-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a dummy bus so top level Xen devices can attach to it (instead of attaching directly to the nexus). This allows to have all the Xen related devices grouped under a single bus. Sponsored by: Citrix Systems R&D Approved by: gibbs x86/xen/xenpv.c: - Attach the xenpv bus when running as a Xen guest. - Attach the ISA bus if needed, in order to attach syscons. conf/files.amd6: conf/files.i386: - Include the xenpv.c file in the build of i386/amd64 kernels using XENHVM. dev/xen/console/console.c: dev/xen/timer/timer.c: xen/xenstore/xenstore.c: - Attach to the xenpv bus instead of the Nexus. dev/xen/xenpci/xenpci.c: - Xen specific devices on PVHVM guests are no longer attached to the xenpci device, they are instead attached to the xenpv bus, remove the now unused methods. Notes: svn path=/head/; revision=267528
* xen: fix usage of db_active in xen consoleRoger Pau Monné2014-03-171-2/+1
| | | | | | | | | | | Replace usage of db_active in Xen console with kdb_active. Reported by: Andrzej Tobola <ato@iem.pw.edu.pl> Approved by: gibbs Sponsored by: Citrix Systems R&D Notes: svn path=/head/; revision=263268
* xen: add and enable Xen console for PVH guestsRoger Pau Monné2014-03-112-13/+88
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds and enables the PV console used on XEN kernels to GENERIC/XENHVM kernels in order for it to be used on PVH. Approved by: gibbs Sponsored by: Citrix Systems R&D dev/xen/console/console.c: - Define console_page. - Move xc_printf debug function from i386 XEN code to generic console code. - Rework xc_printf. - Use xen_initial_domain instead of open-coded checks for Dom0. - Gate the attach of the PV console to PV(H) guests. dev/xen/console/xencons_ring.c: - Allow the PV Xen console to output earlier by directly signaling the event channel in start_info if the event channel is not yet initialized. - Use HYPERVISOR_start_info instead of xen_start_info. i386/include/xen/xen-os.h: - Remove prototype for xc_printf since it's now declared in global xen-os.h i386/xen/xen_machdep.c: - Remove previous version of xc_printf. - Remove definition of console_page (now it's defined in the console itself). - Fix some printf formatting errors. x86/xen/pv.c: - Add some early boot debug messages using xc_printf. - Set console_page based on the value passed in start_info. xen/xen-os.h: - Declare console_page and add prototype for xc_printf. Notes: svn path=/head/; revision=263004
* In sys/dev/xen/console/console.c, #if 0 an unused static function.Dimitry Andric2014-02-151-0/+2
| | | | | | | MFC after: 3 days Notes: svn path=/head/; revision=261916
* More BUS_PROBE_NOWILDCARD sweeping. Some devices here (if_ath_ahb and siba)Nathan Whitehorn2013-10-291-1/+1
| | | | | | | | | resist easy conversion since they implement a great deal of their attach logic inside probe(). Some of this could be fixed by moving it to attach(), but some requires something more subtle than BUS_PROBE_NOWILDCARD. Notes: svn path=/head/; revision=257341
* Implement vector callback for PVHVM and unify event channel implementationsJustin T. Gibbs2013-08-292-18/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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. Notes: svn path=/head/; revision=255040
* Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on ↵Sofian Brabez2013-01-301-1/+2
| | | | | | | | | | device_method_t arrays Reviewed by: cognet Approved by: cognet Notes: svn path=/head/; revision=246128
* kern cons: introduce infrastructure for console grabbing by kernelAndriy Gapon2011-12-171-0/+12
| | | | | | | | | | | | | | | At the moment grab and ungrab methods of all console drivers are no-ops. Current intended meaning of the calls is that the kernel takes control of console input. In the future the semantics may be extended to mean that the calling thread takes full ownership of the console (e.g. console output from other threads could be suspended). Inspired by: bde MFC after: 2 months Notes: svn path=/head/; revision=228631
* Add support for alternative break-to-debugger support on the Xen console.Robert Watson2011-09-021-1/+9
| | | | | | | | | | | This should help debug boot-time hangs experienced in 9.0-BETA. MFC after: 3 weeks Tested by: sbruno Approved by: re (kib) Notes: svn path=/head/; revision=225343
* A lack of console input is not the same thing as a byte of \0 input.Colin Percival2010-12-291-3/+4
| | | | | | | | | | | Correctly return -1 from cngetc when no input is available to be read. This fixes the '(CTRL-C to abort)' spam while dumping. MFC after: 3 days Notes: svn path=/head/; revision=216790
* remove annoying printf that cripples kdb on PV guestsKip Macy2009-11-241-1/+0
| | | | Notes: svn path=/head/; revision=199735
* Cleanups to the Xen console driver:Ed Schouten2009-08-241-41/+27
| | | | | | | | | | | | | | | | | - Use CONSOLE_DRIVER() instead of the deprecated CONS_DRIVER() declaration. - This means we cannot use cn_checkc anymore, which is supposed to do the same as cn_getc nowadays. Remove the cn_getc implementation (that was never being called) and rename cn_checkc to cn_getc. - Don't run-time patch cn_putc, but add the logic to xc_cnputc(). This means I could do some cleanups to our console code... Tested by: nobody on hackers@ Notes: svn path=/head/; revision=196499
* Last minute TTY API change: remove mutex argument from tty_alloc().Ed Schouten2009-05-291-1/+1
| | | | | | | | | | | | | I don't want people to override the mutex when allocating a TTY. It has to be there, to keep drivers like syscons happy. So I'm creating a tty_alloc_mutex() which can be used in those cases. tty_alloc_mutex() should eventually be removed. The advantage of this approach, is that we can just remove a function, without breaking the regular API in the future. Notes: svn path=/head/; revision=193018
* Disable some un-needed console debugging.Adrian Chadd2009-05-181-1/+1
| | | | Notes: svn path=/head/; revision=192285
* don't acquire tty lock with console lock heldKip Macy2009-05-112-1/+5
| | | | Notes: svn path=/head/; revision=192004
* xen console lock needs to be a spin lock in case it is acquired from an ↵Kip Macy2009-05-113-5/+16
| | | | | | | interrupt context Notes: svn path=/head/; revision=192003
* Fix the Xen build for i386 PV mode.Doug Rabson2009-04-011-2/+1
| | | | Notes: svn path=/head/; revision=190627
* Merge in support for Xen HVM on amd64 architecture.Doug Rabson2009-03-112-33/+44
| | | | Notes: svn path=/head/; revision=189699
* merge 186535, 186537, and 186538 from releng_7_xenKip Macy2008-12-292-16/+22
| | | | | | | | | | | | | | | | Log: - merge in latest xenbus from dfr's xenhvm - fix race condition in xs_read_reply by converting tsleep to mtx_sleep Log: unmask evtchn in bind_{virq, ipi}_to_irq Log: - remove code for handling case of not being able to sleep - eliminate tsleep - make sleeps atomic Notes: svn path=/head/; revision=186557
* Remove unused consdev structure fields.Ed Schouten2008-10-271-1/+0
| | | | | | | | | The cn_unit and cn_tp fields don't seem to be used anywhere. Some drivers set them, while others don't. Just remove them, in an attempt to make our consdev code a little easier to understand. Notes: svn path=/head/; revision=184329
* Replace all calls to minor() with dev2unit().Ed Schouten2008-09-271-1/+1
| | | | | | | | | | | | | | | | | | After I removed all the unit2minor()/minor2unit() calls from the kernel yesterday, I realised calling minor() everywhere is quite confusing. Character devices now only have the ability to store a unit number, not a minor number. Remove the confusion by using dev2unit() everywhere. This commit could also be considered as a bug fix. A lot of drivers call minor(), while they should actually be calling dev2unit(). In -CURRENT this isn't a problem, but it turns out we never had any problem reports related to that issue in the past. I suspect not many people connect more than 256 pieces of the same hardware. Reviewed by: kib Notes: svn path=/head/; revision=183397
* change netfront to match xen31_6Kip Macy2008-08-201-1/+1
| | | | | | | fix console locking Notes: svn path=/head/; revision=181916
* Integrate the Xen console driver.Ed Schouten2008-08-201-165/+36
| | | | | | | | | | | | I initially didn't want to integrate the Xen console driver, because it did not receive any testing. Kip Macy suggested that I'd better check it in right now, because this is the easiest way for him to test it while he is working on the Xen import. Requested by: kmacy Notes: svn path=/head/; revision=181908
* Compile fixes for xen build.Kip Macy2008-08-152-4/+0
| | | | | | | MFC after: 1 month. Notes: svn path=/head/; revision=181747
* Import Xen paravirtual drivers.Kip Macy2008-08-123-0/+738
MFC after: 2 weeks Notes: svn path=/head/; revision=181643
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