Commit Graph

2741 Commits

Author SHA1 Message Date
Ed Maste
3d271aaab0 x86: Allow users to change PSL_RF via ptrace(PT_SETREGS...)
Debuggers may need to change PSL_RF.  Note that tf_eflags is already stored
in the signal context during signal handling and PSL_RF previously could be
modified via sigreturn, so this change should not provide any new ability
to userspace.

For background see the thread at:
http://lists.freebsd.org/pipermail/freebsd-i386/2007-September/005910.html

Reviewed by:	jhb, kib
Sponsored by:	DARPA, AFRL
2013-11-14 15:37:20 +00:00
Jung-uk Kim
c01bf4edad MFi386: r254619
Reimplement atomic_load_acq_64() and atomic_store_rel_64() for i386.

Noticed by:	tinderbox
2013-08-22 16:39:59 +00:00
Pawel Jakub Dawidek
417ffc66fa Add process descriptors support to the GENERIC kernel. It is already being
used by the tools in base systems and with sandboxing more and more tools
the usage should only increase.

Submitted by:	Mariusz Zaborski <oshogbo@FreeBSD.org>
Sponsored by:	Google Summer of Code 2013
MFC after:	1 month
2013-08-18 10:21:29 +00:00
Jeff Roberson
5df87b21d3 Replace kernel virtual address space allocation with vmem. This provides
transparent layering and better fragmentation.

 - Normalize functions that allocate memory to use kmem_*
 - Those that allocate address space are named kva_*
 - Those that operate on maps are named kmap_*
 - Implement recursive allocation handling for kmem_arena in vmem.

Reviewed by:	alc
Tested by:	pho
Sponsored by:	EMC / Isilon Storage Division
2013-08-07 06:21:20 +00:00
David E. O'Brien
0e6a0799a9 Back out r253779 & r253786. 2013-07-31 17:21:18 +00:00
David E. O'Brien
99ff83da74 Decouple yarrow from random(4) device.
* Make Yarrow an optional kernel component -- enabled by "YARROW_RNG" option.
  The files sha2.c, hash.c, randomdev_soft.c and yarrow.c comprise yarrow.

* random(4) device doesn't really depend on rijndael-*.  Yarrow, however, does.

* Add random_adaptors.[ch] which is basically a store of random_adaptor's.
  random_adaptor is basically an adapter that plugs in to random(4).
  random_adaptor can only be plugged in to random(4) very early in bootup.
  Unplugging random_adaptor from random(4) is not supported, and is probably a
  bad idea anyway, due to potential loss of entropy pools.
  We currently have 3 random_adaptors:
  + yarrow
  + rdrand (ivy.c)
  + nehemeiah

* Remove platform dependent logic from probe.c, and move it into
  corresponding registration routines of each random_adaptor provider.
  probe.c doesn't do anything other than picking a specific random_adaptor
  from a list of registered ones.

* If the kernel doesn't have any random_adaptor adapters present then the
  creation of /dev/random is postponed until next random_adaptor is kldload'ed.

* Fix randomdev_soft.c to refer to its own random_adaptor, instead of a
  system wide one.

Submitted by: arthurmesh@gmail.com, obrien
Obtained from: Juniper Networks
Reviewed by: obrien
2013-07-29 20:26:27 +00:00
Yoshihiro Takahashi
0ead4cbf9f MFi386: revision 251039
Use slightly more idiomatic expression to get the address of array.
2013-06-01 12:21:59 +00:00
Peter Wemm
dda759d344 Tidy up some CVS workarounds. 2013-05-12 01:53:47 +00:00
Gabor Kovesdan
b78540b1c7 - Correct mispellings of word resource
Submitted by:	Christoph Mallon <christoph.mallon@gmx.de>
2013-04-17 11:47:32 +00:00
Gleb Smirnoff
4e76af6a41 Merge from projects/counters: counter(9).
Introduce counter(9) API, that implements fast and raceless counters,
provided (but not limited to) for gathering of statistical data.

See http://lists.freebsd.org/pipermail/freebsd-arch/2013-April/014204.html
for more details.

In collaboration with:	kib
Reviewed by:		luigi
Tested by:		ae, ray
Sponsored by:		Nginx, Inc.
2013-04-08 19:40:53 +00:00
Alexander Motin
45f6d66569 Remove all legacy ATA code parts, not used since options ATA_CAM enabled in
most kernels before FreeBSD 9.0.  Remove such modules and respective kernel
options: atadisk, ataraid, atapicd, atapifd, atapist, atapicam.  Remove the
atacontrol utility and some man pages.  Remove useless now options ATA_CAM.

No objections:	current@, stable@
MFC after:	never
2013-04-04 07:12:24 +00:00
Attilio Rao
89f6b8632c Switch the vm_object mutex to be a rwlock. This will enable in the
future further optimizations where the vm_object lock will be held
in read mode most of the time the page cache resident pool of pages
are accessed for reading purposes.

The change is mostly mechanical but few notes are reported:
* The KPI changes as follow:
  - VM_OBJECT_LOCK() -> VM_OBJECT_WLOCK()
  - VM_OBJECT_TRYLOCK() -> VM_OBJECT_TRYWLOCK()
  - VM_OBJECT_UNLOCK() -> VM_OBJECT_WUNLOCK()
  - VM_OBJECT_LOCK_ASSERT(MA_OWNED) -> VM_OBJECT_ASSERT_WLOCKED()
    (in order to avoid visibility of implementation details)
  - The read-mode operations are added:
    VM_OBJECT_RLOCK(), VM_OBJECT_TRYRLOCK(), VM_OBJECT_RUNLOCK(),
    VM_OBJECT_ASSERT_RLOCKED(), VM_OBJECT_ASSERT_LOCKED()
* The vm/vm_pager.h namespace pollution avoidance (forcing requiring
  sys/mutex.h in consumers directly to cater its inlining functions
  using VM_OBJECT_LOCK()) imposes that all the vm/vm_pager.h
  consumers now must include also sys/rwlock.h.
* zfs requires a quite convoluted fix to include FreeBSD rwlocks into
  the compat layer because the name clash between FreeBSD and solaris
  versions must be avoided.
  At this purpose zfs redefines the vm_object locking functions
  directly, isolating the FreeBSD components in specific compat stubs.

The KPI results heavilly broken by this commit.  Thirdy part ports must
be updated accordingly (I can think off-hand of VirtualBox, for example).

Sponsored by:	EMC / Isilon storage division
Reviewed by:	jeff
Reviewed by:	pjd (ZFS specific review)
Discussed with:	alc
Tested by:	pho
2013-03-09 02:32:23 +00:00
Davide Italiano
acccf7d8b4 MFcalloutng:
When CPU becomes idle, cpu_idleclock() calculates time to the next timer
event in order to reprogram hw timer. Return that time in sbintime_t to
the caller and pass it to acpi_cpu_idle(), where it can be used as one
more factor (quite precise) to extimate furter sleep time and choose
optimal sleep state. This is a preparatory change for further callout
improvements will be committed in the next days.

The commmit is not targeted for MFC.
2013-02-28 10:46:54 +00:00
Eitan Adler
4752ed3d7f Remove support for plip from the GENERIC kernel as no systems in the
last 10 years require this support.

Discussed with:	db
Discussed with:	kib
Reviewed by:	imp
Reviewed by:	jhb
Reviewed by:	-hackers
Approved by:	cperciva (mentor)
2013-02-01 20:17:11 +00:00
Warner Losh
f30498a04b MFi386: Make similar changes that were made to atkbdc in r245315. 2013-01-11 23:42:24 +00:00
Yoshihiro Takahashi
bf5c6315c6 MFi386: r232521
Exclude USB drivers (except umass and ukbd) from main kernel image.
2013-01-04 09:52:09 +00:00
Dag-Erling Smørgrav
36fca20f10 As discussed on -current last October, remove the firewire drivers from
GENERIC.
2013-01-03 14:30:24 +00:00
Yoshihiro Takahashi
34d4770b5e Reduce diffs against i386. 2012-11-10 13:48:41 +00:00
Yoshihiro Takahashi
54336243a4 Fix some KASSERTs.
They are missing changes from r208833, r227394 and r227442.
2012-11-10 13:41:25 +00:00
Yoshihiro Takahashi
f6df06f1a9 MFi386: r211924
Register an interrupt vector for DTrace return probes.
2012-11-10 13:25:46 +00:00
Yoshihiro Takahashi
662df24813 Use ANSI prototype to fix build with clang.
MFC after:	1 week
2012-11-10 13:24:33 +00:00
Eitan Adler
1611e2c0d1 The 'testing memory' patch gets printed too many times
Approved by: cperciva (implicit)
2012-10-22 11:57:26 +00:00
Eitan Adler
267cc84937 Explain the upcoming delay by printing a message when the kernel
is about to begin testing memory.

Reviewed by:	dteske, adri
Approved by:	cperciva
MFC after:	1 week
2012-10-22 03:16:39 +00:00
Attilio Rao
3a4730256a Add an unified macro to deny ability from the compiler to reorder
instruction loads/stores at its will.
The macro __compiler_membar() is currently supported for both gcc and
clang, but kernel compilation will fail otherwise.

Reviewed by:	bde, kib
Discussed with:	dim, theraven
MFC after:	2 weeks
2012-10-09 14:32:30 +00:00
Attilio Rao
af2bdacafb Reverts r234074,234105,234564,234723,234989,235231-235232 and part of
r234247.
Use, instead, the static intializer introduced in r239923 for x86 and
sparc64 intr_cpus, unwinding the code to the initial version.

Reviewed by:	marius
2012-10-09 12:22:43 +00:00
Yoshihiro Takahashi
47c6c015ff MFi386: revision 237445
Commit changes missed from r237435.  Properly calculate the signal
  trampoline addresses after the shared page is enabled.  Handle FreeBSD
  ABIs without shared page support too.

MFi386: revision 238792

  Introduce curpcb magic variable.
2012-09-23 09:13:57 +00:00
Glen Barber
67944c4572 Grammar fix: s/NIC's/NICs/
MFC after:	3 days
2012-08-26 01:21:02 +00:00
John Baldwin
5355f65974 Partially revert r217515 so that the mem_range_softc variable is always
present on x86 kernels.  This fixes the build of kernels that include
'device acpi' but do not include 'device mem'.

MFC after:	1 month
2012-07-09 20:42:08 +00:00
Konstantin Belousov
aea810386d Implement mechanism to export some kernel timekeeping data to
usermode, using shared page.  The structures and functions have vdso
prefix, to indicate the intended location of the code in some future.

The versioned per-algorithm data is exported in the format of struct
vdso_timehands, which mostly repeats the content of in-kernel struct
timehands. Usermode reading of the structure can be lockless.
Compatibility export for 32bit processes on 64bit host is also
provided. Kernel also provides usermode with indication about
currently used timecounter, so that libc can fall back to syscall if
configured timecounter is unknown to usermode code.

The shared data updates are initiated both from the tc_windup(), where
a fast task is queued to do the update, and from sysctl handlers which
change timecounter. A manual override switch
kern.timecounter.fast_gettime allows to turn off the mechanism.

Only x86 architectures export the real algorithm data, and there, only
for tsc timecounter. HPET counters page could be exported as well, but
I prefer to not further glue the kernel and libc ABI there until
proper vdso-based solution is developed.

Minimal stubs neccessary for non-x86 architectures to still compile
are provided.

Discussed with:	bde
Reviewed by:	jhb
Tested by:	flo
MFC after:	1 month
2012-06-22 07:06:40 +00:00
Alexander Motin
dc0aa406db MFprojects/zfsd:
Generalize and unify ses device description.
2012-05-24 11:20:51 +00:00
Mitsuru IWASAKI
e3fd0bc1b2 Add SMP/i386 suspend/resume support.
Most part is merged from amd64.

- i386/acpica/acpi_wakecode.S
Replaced with amd64 code (from realmode to paging enabling code).

- i386/acpica/acpi_wakeup.c
Replaced with amd64 code (except for wakeup_pagetables stuff).

- i386/include/pcb.h
- i386/i386/genassym.c
Added PCB new members (CR0, CR2, CR4, DS, ED, FS, SS, GDT, IDT, LDT
and TR) needed for suspend/resume, not for context switch.

- i386/i386/swtch.s
Added suspendctx() and resumectx().
Note that savectx() was not changed and used for suspending (while
amd64 code uses it).
BSP and AP execute the same sequence, suspendctx(), acpi_wakecode()
and resumectx() for suspend/resume (in case of UP system also).

- i386/i386/apic_vector.s
Added cpususpend().

- i386/i386/mp_machdep.c
- i386/include/smp.h
Added cpususpend_handler().

- i386/include/apicvar.h
- kern/subr_smp.c
- sys/smp.h
Added IPI_SUSPEND and suspend_cpus().

- i386/i386/initcpu.c
- i386/i386/machdep.c
- i386/include/md_var.h
- pc98/pc98/machdep.c
Moved initializecpu() declarations to md_var.h.

MFC after:	3 days
2012-05-18 18:55:58 +00:00
Attilio Rao
70dbd1604c Clean up the intr* MD KPI from the SMP dependency, removing a cause of
discrepancy between modules and kernel, but deal with SMP differences
within the functions themselves.

As an added bonus this also helps in terms of code readability.

Requested by:	gibbs
Reviewed by:	jhb, marius
MFC after:	1 week
2012-04-26 20:24:25 +00:00
Yoshihiro Takahashi
42f4a70cbb MFi386: revisions 234074 and 234105
- Adding the BSP as an interrupt target directly in cpu_startup().
2012-04-22 04:36:25 +00:00
John Baldwin
435803f3c7 Move the legacy(4) driver to x86. 2012-03-30 19:10:14 +00:00
Ed Schouten
92396a3174 Remove pty(4) from our kernel configurations.
As of FreeBSD 8, this driver should not be used. Applications that use
posix_openpt(2) and openpty(3) use the pts(4) that is built into the
kernel unconditionally. If it turns out high profile depend on the
pty(4) module anyway, I'd rather get those fixed. So please report any
issues to me.

The pty(4) module is still available as a kernel module of course, so a
simple `kldload pty' can be used to run old-style pseudo-terminals.
2012-03-21 08:38:42 +00:00
Tijl Coosemans
dfb1c11345 Copy amd64 sysarch.h to x86 and merge with i386 sysarch.h. Replace
amd64/i386/pc98 sysarch.h with stubs.
2012-03-19 21:57:31 +00:00
Tijl Coosemans
2c7879ea84 Copy i386 specialreg.h to x86 and merge with amd64 specialreg.h. Replace
amd64/i386/pc98 specialreg.h with stubs.
2012-03-19 21:34:11 +00:00
Tijl Coosemans
68156ad982 Copy i386 psl.h to x86 and replace amd64/i386/pc98 psl.h with stubs. 2012-03-19 21:29:57 +00:00
Tijl Coosemans
01cd19680d Copy i386 reg.h to x86 and merge with amd64 reg.h. Replace i386/amd64/pc98
reg.h with stubs.

The tREGISTER macros are only made visible on i386. These macros are
deprecated and should not be available on amd64.

The i386 and amd64 versions of struct reg have been renamed to struct
__reg32 and struct __reg64. During compilation either __reg32 or __reg64
is defined as reg depending on the machine architecture. On amd64 the i386
struct is also available as struct reg32 which is used in COMPAT_FREEBSD32
code.

Most of compat/ia32/ia32_reg.h is now IA64 only.

Reviewed by:	kib (previous version)
2012-03-18 19:06:38 +00:00
Yoshihiro Takahashi
dff207f860 - Fix to build a native i386 kernel without the SMP and atpic.
- Merge r232744 changes to pc98.
  (Allow a kernel to be built with 'nodevice atpic'.)
- Move ICU related defines from x86/isa/atpic.c to x86/isa/icu.h and
  use them in x86/x86/intr_machdep.c.

Reviewed by:	jhb
2012-03-16 12:13:44 +00:00
Attilio Rao
9c170fd168 Disable the option VFS_ALLOW_NONMPSAFE by default on all the supported
platforms.
This will make every attempt to mount a non-mpsafe filesystem to the
kernel forbidden, unless it is expressely compiled with
VFS_ALLOW_NONMPSAFE option.

This patch is part of the effort of killing non-MPSAFE filesystems
from the tree.

No MFC is expected for this patch.
2012-03-06 20:01:25 +00:00
Tijl Coosemans
d8a023328d Copy amd64 ptrace.h to x86 and merge with i386 ptrace.h. Replace
amd64/i386/pc98 ptrace.h with stubs.

For amd64 PT_GETXSTATE and PT_SETXSTATE have been redefined to match the
i386 values. The old values are still supported but should no longer be
used.

Reviewed by:	kib
2012-03-04 20:24:28 +00:00
Tijl Coosemans
8b4a1ed0de Copy amd64 trap.h to x86 and replace amd64/i386/pc98 trap.h with stubs. 2012-03-04 14:12:57 +00:00
Tijl Coosemans
ee0d5ab989 Copy amd64 float.h to x86 and merge with i386 float.h. Replace
amd64/i386/pc98 float.h with stubs.
2012-03-04 14:00:32 +00:00
Tijl Coosemans
5b2a5decd1 Copy amd64 stdarg.h to x86 and replace amd64/i386/pc98 stdarg.h with stubs. 2012-02-28 22:30:58 +00:00
Tijl Coosemans
f85ac30a3d Copy amd64 setjmp.h to x86 and replace amd64/i386/pc98 setjmp.h with stubs. 2012-02-28 22:17:52 +00:00
Tijl Coosemans
95b1d16df5 Copy amd64 endian.h to x86 and merge with i386 endian.h. Replace
amd64/i386/pc98 endian.h with stubs.

In __bswap64_const(x) the conflict between 0xffUL and 0xffULL has been
resolved by reimplementing the macro in terms of __bswap32(x). As a side
effect __bswap64_var(x) is now implemented using two bswap instructions on
i386 and should be much faster. __bswap32_const(x) has been reimplemented
in terms of __bswap16(x) for consistency.
2012-02-28 19:39:54 +00:00
Tijl Coosemans
8770e9db97 Copy amd64 _stdint.h to x86 and merge with i386 _stdint.h. Replace
amd64/i386/pc98 _stdint.h with stubs.
2012-02-28 18:38:33 +00:00
Tijl Coosemans
8cfa93e4be Copy amd64 _limits.h to x86 and merge with i386 _limits.h. Replace
amd64/i386/pc98 _limits.h with stubs.
2012-02-28 18:24:28 +00:00
Tijl Coosemans
8f77be2b4c Copy amd64 _types.h to x86 and merge with i386 _types.h. Replace existing
amd64/i386/pc98 _types.h with stubs.
2012-02-28 18:15:28 +00:00