Commit Graph

1069 Commits

Author SHA1 Message Date
Marcel Moolenaar
01bd17cc99 Add kdb_cpu_sync_icache(), intended to synchronize instruction
caches with data caches after writing to memory. This typically
is required to make breakpoints work on ia64 and powerpc. For
those architectures the function is implemented.
2007-06-09 21:55:17 +00:00
Robert Watson
68d4cc614a Enable AUDIT by default in the GENERIC kernel, allowing security event
auditing to be turned on without a kernel recompile, just an rc.conf
option.

Approved by:	re (kensmith)
Obtained from:	TrustedBSD Project
2007-06-08 20:29:07 +00:00
Marcel Moolenaar
ba49b9f773 Sync with other platforms: add kluge to use contigmalloc when the
alignment is larger than the size and print a diagnostic when we
didn't satisfy the alignment.
2007-06-08 04:46:50 +00:00
Peter Grehan
921c1d50f0 Fix the compile. Band-aid until it is worked out how to use the context
switch api on ppc.
2007-06-06 06:01:56 +00:00
Jeff Roberson
1b1618fb12 - Change comments and asserts to reflect the removal of the global
scheduler lock.

Tested by:      kris, current@
Tested on:      i386, amd64, ULE, 4BSD, libthr, libkse, PREEMPTION, etc.
Discussed with: kris, attilio, kmacy, jhb, julian, bde (small parts each)
2007-06-04 23:57:32 +00:00
Attilio Rao
6759608248 Rework the PCPU_* (MD) interface:
- Rename PCPU_LAZY_INC into PCPU_INC
- Add the PCPU_ADD interface which just does an add on the pcpu member
  given a specific value.

Note that for most architectures PCPU_INC and PCPU_ADD are not safe.
This is a point that needs some discussions/work in the next days.

Reviewed by: alc, bde
Approved by: jeff (mentor)
2007-06-04 21:38:48 +00:00
Attilio Rao
2feb50bf7d Revert VMCNT_* operations introduction.
Probabilly, a general approach is not the better solution here, so we should
solve the sched_lock protection problems separately.

Requested by: alc
Approved by: jeff (mentor)
2007-05-31 22:52:15 +00:00
Paolo Pisati
3401f2c1df In some particular cases (like in pccard and pccbb), the real device
handler is wrapped in a couple of functions - a filter wrapper and an
ithread wrapper. In this case (and just in this case), the filter
wrapper could ask the system to schedule the ithread and mask the
interrupt source if the wrapped handler is composed of just an ithread
handler: modify the "old" interrupt code to make it support
this situation, while the "new" interrupt code is already ok.

Discussed with: jhb
2007-05-31 19:25:35 +00:00
Alan Cox
66ab556097 Eliminate some unused definitions that came from NetBSD. 2007-05-28 21:04:22 +00:00
Marcel Moolenaar
82c663b4fe Don't initialize the decrementer before initclocks() is called.
Use cpu_initclocks() for that as it assures that relevant locks
have been initialized.
2007-05-27 21:05:35 +00:00
Alan Cox
c155d5d059 Eliminate an unused definition. 2007-05-27 20:34:26 +00:00
Alexander Kabaev
23a29e45cd Allow FreeBSD's native ELF image activators to execute shared libraries the
same way it was enabled for Linux binares in linuxulator.

This allows binaries built with -pie. Many ports auto-detect -fPIE support
in GCC 4.2 and build binaries FreeBSD was unable to run.
2007-05-22 02:22:58 +00:00
Jeff Roberson
222d01951f - define and use VMCNT_{GET,SET,ADD,SUB,PTR} macros for manipulating
vmcnts.  This can be used to abstract away pcpu details but also changes
   to use atomics for all counters now.  This means sched lock is no longer
   responsible for protecting counts in the switch routines.

Contributed by:		Attilio Rao <attilio@FreeBSD.org>
2007-05-18 07:10:50 +00:00
Alan Cox
04a18977c8 Define every architecture as either VM_PHYSSEG_DENSE or
VM_PHYSSEG_SPARSE depending on whether the physical address space is
densely or sparsely populated with memory.  The effect of this
definition is to determine which of two implementations of
vm_page_array and PHYS_TO_VM_PAGE() is used.  The legacy
implementation is obtained by defining VM_PHYSSEG_DENSE, and a new
implementation that trades off time for space is obtained by defining
VM_PHYSSEG_SPARSE.  For now, all architectures except for ia64 and
sparc64 define VM_PHYSSEG_DENSE.  Defining VM_PHYSSEG_SPARSE on ia64
allows the entirety of my Itanium 2's memory to be used.  Previously,
only the first 1 GB could be used.  Defining VM_PHYSSEG_SPARSE on
sparc64 allows USIIIi-based systems to boot without crashing.

This change is a combination of Nathan Whitehorn's patch and my own
work in perforce.

Discussed with: kmacy, marius, Nathan Whitehorn
PR:		112194
2007-05-05 19:50:28 +00:00
Peter Grehan
90bf3dc7cb Add ofw bus methods to the ppc nexus driver. This will be used in future
EFIKA platform support.

PR:	111522
Submitted by:	Andrew Turner, andrew at fubar geek nz
2007-04-20 03:24:59 +00:00
Pawel Jakub Dawidek
fef2a25971 Remove trailing '.' for consistency! 2007-04-10 21:40:13 +00:00
Pawel Jakub Dawidek
57bcf75fd2 Add UFS_GJOURNAL options to the GENERIC kernel.
Approved by:	re (kensmith)
2007-04-10 16:49:41 +00:00
Robert Watson
af940ed8c0 If nooption SMP on powerpc, also nooption ADAPTIVE_SX, which depends on
SMP and is now in the global NOTES.
2007-04-01 11:10:16 +00:00
Marcel Moolenaar
d71cc3c89d Add bge(4).
Fix a white-space nit while I'm here.
2007-04-01 06:24:19 +00:00
Marcel Moolenaar
37402373e9 When writing to PCI configuration registers, don't immediately
read the same register back. It can cause hangs or machine
checks in certain cases. One particular case is with bge(4)
when a reset is initiated for the controller.

MFC after: 1 month
2007-04-01 06:15:53 +00:00
Marcel Moolenaar
447e3a84cc Remove unused file. 2007-04-01 00:41:01 +00:00
Alan Cox
c640357f04 Push down the implementation of PCPU_LAZY_INC() into the machine-dependent
header file.  Reimplement PCPU_LAZY_INC() on amd64 and i386 making it
atomic with respect to interrupts.

Reviewed by: bde, jhb
2007-03-11 05:54:29 +00:00
Mohan Srinivasan
f9bb753844 Over NFS, an open() call could result in multiple over-the-wire
GETATTRs being generated - one from lookup()/namei() and the other
from nfs_open() (for cto consistency). This change eliminates the
GETATTR in nfs_open() if an otw GETATTR was done from the namei()
path. Instead of extending the vop interface, we timestamp each attr
load, and use this to detect whether a GETATTR was done from namei()
for this syscall. Introduces a thread-local variable that counts the
syscalls made by the thread and uses <pid, tid, thread syscalls> as
the attrload timestamp. Thanks to jhb@ and peter@ for a discussion on
thread state that could be used as the timestamp with minimal overhead.
2007-03-09 04:02:38 +00:00
Paolo Pisati
babacef4ef Update openpic to support the new bus_setup_intr() syntax.
Reviewed by: marcel
2007-03-07 11:42:14 +00:00
Paolo Pisati
fab48452ae Make pswitch_intr() returns interrupt handling status. 2007-03-02 15:13:17 +00:00
Paolo Pisati
83496acdc6 Catch up with bus_setup_intr() modification and garbage collect a
reference to INTR_FAST.
2007-02-25 15:04:08 +00:00
Paolo Pisati
ef544f6312 o break newbus api: add a new argument of type driver_filter_t to
bus_setup_intr()

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current

Reviewed by: many
Approved by: re@
2007-02-23 12:19:07 +00:00
Marcel Moolenaar
9bc4cd63f3 The table of known CPU models ends with an entry that has a version
of 0, not with an entry that has an empty CPU name.

Submitted by: Andrew Turner (andrew@fubar.geek.nz)
2007-02-18 17:40:09 +00:00
Kevin Lo
e82e4cb1b8 Remove the cast to caddr_t for sfp, they're not needed.
Reviewed by: marcel
2007-02-12 08:59:33 +00:00
Brooks Davis
983f970981 Include GEOM_LABEL in GENERIC. It's very useful and not well publicized
enough.

Approved by:	pjd
2007-02-09 19:03:18 +00:00
Marcel Moolenaar
1d3aed33e8 Evolve the ctlreq interface added to geom_gpt into a generic
partitioning class that supports multiple schemes. Current
schemes supported are APM (Apple Partition Map) and GPT.
Change all GEOM_APPLE anf GEOM_GPT options into GEOM_PART_APM
and GEOM_PART_GPT (resp).

The ctlreq interface supports verbs to create and destroy
partitioning schemes on a disk; to add, delete and modify
partitions; and to commit or undo changes made.
2007-02-07 18:55:31 +00:00
Marcel Moolenaar
500a5696d4 Remove stale header.
MFC after: 3 days
2007-01-26 04:58:31 +00:00
Marcel Moolenaar
e4da8bea2c Propagate the CPU model to the hw.model sysctl. 2007-01-14 21:45:05 +00:00
Warner Losh
fed32d7544 Remove 3rd clause, renumber, ok per email 2007-01-12 07:26:21 +00:00
Marius Strobl
6e62b06982 Add missing SC_NO_MODE_CHANGE option. Disable it in the powerpc
NOTES though, as ofw_syscons(4) doesn't properly interface with
syscons(4) regarding loading the font specified with SC_DFLT_FONT,
causing a kernel with both options SC_OFWFB and SC_NO_MODE_CHANGE
to not link.
2007-01-10 18:45:18 +00:00
Marcel Moolenaar
b92167c505 In cpu_reset(), call OF_reboot() instead of OF_exit(). The latter
doesn't do a reboot and has been observed to reset the NVRAM to its
default values.
2006-12-28 23:56:50 +00:00
Peter Grehan
bd8e6f87c8 Remove bogus increment of re-hashed PTEG index. This snuck in with r1.12 of
pmap.c, and is potentially the cause of hangs reported on machines with a
small amount of memory. On machines with sufficient RAM, and without a lot
of processes running, this situation would probably never occur.

Testing is still incomplete, but it is obviously wrong so remove the
offending code now.

The issue of what to do when both the primary and secondary hash overflow
is still open.

Reported by:	Dan Kresja at windriver dot com, via alc
2006-12-20 01:10:21 +00:00
Marcel Moolenaar
812403402e Implement OF_decode_addr(). This makes uart(4) work as a serial
console on a Xserve G4.
2006-12-13 06:11:22 +00:00
Marcel Moolenaar
270c77f7f7 Implement bus_space_map(). 2006-12-13 03:25:31 +00:00
Marcel Moolenaar
d2a2b3293e Add support for multiple FAST handlers.
Reviewed & tested by: grehan@
2006-12-07 17:08:16 +00:00
Julian Elischer
ad1e7d285a Threading cleanup.. part 2 of several.
Make part of John Birrell's KSE patch permanent..
Specifically, remove:
Any reference of the ksegrp structure. This feature was
never fully utilised and made things overly complicated.
All code in the scheduler that tried to make threaded programs
fair to unthreaded programs.  Libpthread processes will already
do this to some extent and libthr processes already disable it.

Also:
Since this makes such a big change to the scheduler(s), take the opportunity
to rename some structures and elements that had to be moved anyhow.
This makes the code a lot more readable.

The ULE scheduler compiles again but I have no idea if it works.

The 4bsd scheduler still reqires a little cleaning and some functions that now do
ALMOST nothing will go away, but I thought I'd do that as a separate commit.

Tested by David Xu, and Dan Eischen using libthr and libpthread.
2006-12-06 06:34:57 +00:00
Peter Grehan
6e4f008cbb Fix gdb issue where the i-cache was not being updated when a breakpoint
was written into a user's address space. The fix is to modify uiomove_fromphys
to sync the icache when an executable user-space page is written into.

Alan Cox suggested that there should probably be a higher-level interface
to this in the ptrace code, but agreed that this is an OK short-term solution.

Files changed:

pmap.h - declaration of pmap_page_executable()
pmap_dispatch.c - pass through the page_executable call to the mmu object
mmu_oea.c - implement the page_executable method by examining the PTE_EXEC
 field in the vm_page_t
uio_machdep.c - in uiomove_fromphys(), if the op was a UIO_WRITE to user-space,
 and if the page is executable, sync the icache since this is at the least
 a breakpoint-write from gdb.

Reported by:	marcel
Tested by:	marcel, grehan on g3+g4
Discussed with:	alc
MFC after:	2 weeks
2006-12-05 04:01:52 +00:00
Peter Grehan
9955cf96f6 Don't use vm_page_flag_set() if installing bootstrap page-table entries
since the vm page mutex's aren't yet initialized. Fixes boot-time panic.

Reported by:	Dario Freni  saturnero at freesbie dot org
2006-11-30 08:13:06 +00:00
John Birrell
e0b651251d Turn console printf buffering into a kernel option and only on
by default for sun4v where it is absolutely required.

This change moves the buffer from struct pcpu to the stack to avoid
using the critical section which created a LOR in a couple of cases
due to interaction with the tty code and kqueue. The LOR can't be
fixed with the critical section and the pcpu buffer can't be used
without the critical section.

Putting the buffer on the stack was my initial solution, but it was
pointed out that the stress on the stack might cause problems
depending on the call path. We don't have a way of creating tests
for those possible cases, so it's best to leave this as an option
for the time being. In time we may get enough data to enable this
option more generally.
2006-11-30 04:17:05 +00:00
Alan Cox
44b8bd66f9 Make pmap_enter() responsible for setting PG_WRITEABLE instead
of its caller.  (As a beneficial side-effect, a high-contention
acquisition of the page queues lock in vm_fault() is eliminated.)
2006-11-12 21:48:34 +00:00
Alan Cox
cc0d48ffb6 Eliminate unused global variables. 2006-11-11 20:57:52 +00:00
John Birrell
8391a99bf7 Remove the KDTRACE option again because of the complaints about having
it as a default.

For the record, the KDTRACE option caused _no_ additional source files
to be compiled in; certainly no CDDL source files. All it did was to
allow existing BSD licensed kernel files to include one or more CDDL
header files.

By removing this from DEFAULTS, the onus is on a kernel builder to add
the option to the kernel config, possibly by including GENERIC and
customising from there. It means that DTrace won't be a feature
available in FreeBSD by default, which is the way I intended it to be.

Without this option, you can't load the dtrace module (which contains
the dtrace device and the DTrace framework). This is equivalent to
requiring an option in a kernel config before you can load the linux
emulation module, for example.

I think it is a mistake to have DTrace ported to FreeBSD, but not
to have it available to everyone, all the time. The only exception
to this is the companies which distribute systems with FreeBSD embedded.
Those companies will customise their systems anyway. The KDTRACE
option was intended for them, and only them.
2006-11-04 23:50:12 +00:00
John Birrell
1f80cd9398 Build in kernel support for loading DTrace modules by default. This
adds the hooks that DTrace modules register with, and adds a few functions
which have the dtrace_ prefix to allow the DTrace FBT (function boundary
trace) provider to avoid tracing because they are called from the DTtrace
probe context.

Unlike other forms of tracing and debug, DTrace support in the kernel
incurs negligible run-time cost.

I think the only reason why anyone wouldn't want to have kernel support
enabled for DTrace would be due to the license (CDDL) under which DTrace
is released.
2006-11-04 04:58:10 +00:00
John Birrell
3d068827c2 Add a cnputs() function to write a string to the console with
a lock to prevent interspersed strings written from different CPUs
at the same time.

To avoid putting a buffer on the stack or having to malloc one,
space is incorporated in the per-cpu structure. The buffer
size if 128 bytes; chosen because it's the next power of 2 size
up from 80 characters.

String writes to the console are buffered up the end of the line
or until the buffer fills. Then the buffer is flushed to all
console devices.

Existing low level console output via cnputc() is unaffected by
this change. ithread calls to log() are also unaffected to avoid
blocking those threads.

A minor change to the behaviour in a panic situation is that
console output will still be buffered, but won't be written to
a tty as before. This should prevent interspersed panic output
as a number of CPUs panic before we end up single threaded
running ddb.

Reviewed by:	scottl, jhb
MFC after:	2 weeks
2006-11-01 04:54:51 +00:00
John Birrell
3750d1ecad Remove the KSE option now that it's in DEFAULTS on these arches/machines.
The 'nooption' kernel config entry has to be used to turn KSE off now.
This isn't my preferred way of dealing with this, but I'll defer to
scottl's experience with the io/mem kernel option change and the grief
experienced over that.

Submitted by:	scottl@
2006-10-26 22:11:35 +00:00