Commit Graph

1916 Commits

Author SHA1 Message Date
Robert Watson
009d2032af Add "options CAPABILITY_MODE" and "options CAPABILITIES" to GENERIC kernel
configurations for various architectures in FreeBSD 10.x.  This allows
basic Capsicum functionality to be used in the default FreeBSD
configuration on non-embedded architectures; process descriptors are not
yet enabled by default.

MFC after:	3 months
Sponsored by:	Google, Inc
2011-12-29 22:48:36 +00:00
Andriy Gapon
9976156f12 kern cons: introduce infrastructure for console grabbing by kernel
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
2011-12-17 15:08:43 +00:00
Alan Cox
3b03ca3bbe Eliminate vestiges of page coloring. 2011-12-15 05:07:16 +00:00
Ed Schouten
53627e400f Replace __signed by signed.
The signed keyword is an integral part of the C syntax. There's no need
to use __signed.
2011-12-13 13:38:03 +00:00
Attilio Rao
ed1f6dc235 Introduce the option VFS_ALLOW_NONMPSAFE and turn it on by default on
all the architectures.
The option allows to mount non-MPSAFE filesystem. Without it, the
kernel will refuse to mount a non-MPSAFE filesytem.

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

No MFC is expected for this patch.

Tested by:	gianni
Reviewed by:	kib
2011-11-08 10:18:07 +00:00
Ed Schouten
6472ac3d8a Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.
The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.
2011-11-07 15:43:11 +00:00
Ed Schouten
d745c852be Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.
This means that their use is restricted to a single C file.
2011-11-07 06:44:47 +00:00
Ken Smith
6168545a11 Adjust the debugger options slightly. This should help me do the right
thing when changing the debugging options as part of head becoming a new
stable branch.  It may also help people who for one reason or another want
to run head but don't want it slowed down by the debugging support.

Reviewed by:	kib
2011-10-27 13:07:49 +00:00
Ken Smith
36d7cf2f1c Move the debugging support to its own section. This matches what is
in the other architectures' GENERIC and makes removing it at the point
we're creating a new stable branch a bit easier.

Discussed with:	marcel
2011-10-26 22:28:28 +00:00
David Schultz
a50079b7ff People porting FreeBSD to new architectures ought not have to
implement a deprecated FPU control interface in addition to the
standard one.  To make this clearer, further deprecate ieeefp.h
by not declaring the function prototypes except on architectures
that implement them already.

Currently i386 and amd64 implement the ieeefp.h interface for
compatibility, and for fp[gs]etprec(), which doesn't exist on
most other hardware.  Powerpc, sparc64, and ia64 partially implement
it and probably shouldn't, and other architectures don't implement it
at all.
2011-10-21 06:41:46 +00:00
Ken Smith
7042aba738 Add a warning about why sbp(4) is commented out so that curious folks
are forewarned they might wind up with a hole in their foot if they
decide to give it a try.

Suggested by:	dougb
2011-10-19 21:55:20 +00:00
Ken Smith
4c0ba9b742 Comment out the sbp(4) driver for architectures that support it.
As part of the 8.0-RELEASE cycle this was done in stable/8 (r199112)
but was left alone in head so people could work on fixing an issue that
caused boot failure on some motherboards.  Apparently nobody has worked
on it and we are getting reports of boot failure with the 9.0 test builds.
So this time I'll comment out the driver in head (still hoping someone
will work on it) and MFC to stable/9.

Submitted by:	Alberto Villa <avilla at FreeBSD dot org>
2011-10-18 13:45:16 +00:00
Konstantin Belousov
6bfe4c78c8 Remove unused define.
MFC after:	1 month
2011-10-07 16:09:44 +00:00
Konstantin Belousov
578113aaa3 Remove locking of the vm page queues from several pmaps, which only
protected the dirty mask updates. The dirty mask updates are handled
by atomics after the r225840.

Submitted by:	alc
Tested by:	flo (sparc64)
MFC after:	2 weeks
2011-09-28 15:01:20 +00:00
Kip Macy
8451d0dd78 In order to maximize the re-usability of kernel code in user space this
patch modifies makesyscalls.sh to prefix all of the non-compatibility
calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel
entry points and all places in the code that use them. It also
fixes an additional name space collision between the kernel function
psignal and the libc function of the same name by renaming the kernel
psignal kern_psignal(). By introducing this change now we will ease future
MFCs that change syscalls.

Reviewed by:	rwatson
Approved by:	re (bz)
2011-09-16 13:58:51 +00:00
Konstantin Belousov
26ccf4f10f Inline the syscallenter() and syscallret(). This reduces the time measured
by the syscall entry speed microbenchmarks by ~10% on amd64.

Submitted by:	jhb
Approved by:	re (bz)
MFC after:	2 weeks
2011-09-11 16:05:09 +00:00
Konstantin Belousov
3407fefef6 Split the vm_page flags PG_WRITEABLE and PG_REFERENCED into atomic
flags field. Updates to the atomic flags are performed using the atomic
ops on the containing word, do not require any vm lock to be held, and
are non-blocking. The vm_page_aflag_set(9) and vm_page_aflag_clear(9)
functions are provided to modify afalgs.

Document the changes to flags field to only require the page lock.

Introduce vm_page_reference(9) function to provide a stable KPI and
KBI for filesystems like tmpfs and zfs which need to mark a page as
referenced.

Reviewed by:    alc, attilio
Tested by:      marius, flo (sparc64); andreast (powerpc, powerpc64)
Approved by:	re (bz)
2011-09-06 10:30:11 +00:00
Konstantin Belousov
d98d0ce27a - Move the PG_UNMANAGED flag from m->flags to m->oflags, renaming the flag
to VPO_UNMANAGED (and also making the flag protected by the vm object
  lock, instead of vm page queue lock).
- Mark the fake pages with both PG_FICTITIOUS (as it is now) and
  VPO_UNMANAGED. As a consequence, pmap code now can use use just
  VPO_UNMANAGED to decide whether the page is unmanaged.

Reviewed by:	alc
Tested by:	pho (x86, previous version), marius (sparc64),
    marcel (arm, ia64, powerpc), ray (mips)
Sponsored by:	The FreeBSD Foundation
Approved by:	re (bz)
2011-08-09 21:01:36 +00:00
Marcel Moolenaar
3b6ecbbdf1 Fix kernel core dumps now that the kernel is using PBVM. The basic
problem to solve is that we don't have a fixed mapping from kernel
text to physical address so that libkvm can bootstrap itself. We
solve this by passing the physical address of the bootinfo structure
to the consumer as the entry point of the core file. This way,
libkvm can extract the PBVM page table information and locate the
kernel in the core file.
We also need to dump memory chunks of type loader data, because
those hold the kernel and the PBVM page table (among other things).

Approved by:	re (blanket)
2011-08-06 03:40:33 +00:00
Marcel Moolenaar
1af1866850 Follow-up commit: refactor pmap_kextract() to make it easier to
catch and debug issues like the one fixed in the previous commit:
Replace all return statements with goto statements so that we end
up at a single place with a value for the physical address.
Print a message for all unknown KVA addresses.

Approved by:	re (blanket)
2011-08-05 23:10:47 +00:00
Marcel Moolenaar
444b037cd2 Remove stray semicolon in pmap_kextract() that turned the conditional
"return (0)" into an unconditional one and as such broke PBVM address
queries -- such as during kernel core dumps.

Approved by:	re (blanket)
2011-08-05 23:05:46 +00:00
Attilio Rao
786ef92b7b Bump MAXCPU for amd64, ia64 and XLP mips appropriately.
From now on, default values for FreeBSD will be 64 maxiumum supported
CPUs on amd64 and ia64 and 128 for XLP. All the other architectures
seem already capped appropriately (with the exception of sparc64 which
needs further support on jalapeno flavour).

Bump __FreeBSD_version in order to reflect KBI/KPI brekage introduced
during the infrastructure cleanup for supporting MAXCPU > 32. This
covers cpumask_t retiral too.

The switch is considered completed at the present time, so for whatever
bug you may experience that is reconducible to that area, please report
immediately.

Requested by:	marcel, jchandra
Tested by:	pluknet, sbruno
Approved by:	re (kib)
2011-07-19 13:00:30 +00:00
Attilio Rao
732772c701 On 64 bit architectures size_t is 8 bytes, thus it should use an 8 bytes
storage.
Fix the sintrcnt/sintrnames specification.

No MFC is previewed for this patch.

Reported, reviewed and tested by:	marcel
Approved by:	re (kib)
2011-07-19 12:41:57 +00:00
Attilio Rao
68b739cd6f Add the possibility to specify from kernel configs MAXCPU value.
This patch is going to help in cases like mips flavours where you
want a more granular support on MAXCPU.

No MFC is previewed for this patch.

Tested by:	pluknet
Approved by:	re (kib)
2011-07-19 00:37:24 +00:00
Attilio Rao
521ea19d1c - Remove the eintrcnt/eintrnames usage and introduce the concept of
sintrcnt/sintrnames which are symbols containing the size of the 2
  tables.
- For amd64/i386 remove the storage of intr* stuff from assembly files.
  This area can be widely improved by applying the same to other
  architectures and likely finding an unified approach among them and
  move the whole code to be MI. More work in this area is expected to
  happen fairly soon.

No MFC is previewed for this patch.

Tested by:	pluknet
Reviewed by:	jhb
Approved by:	re (kib)
2011-07-18 15:19:40 +00:00
John Baldwin
9c931b6fdc Enable NEW_PCIB by default on ia64.
Approved by:	re (kib), marcel
2011-07-18 14:05:14 +00:00
John Baldwin
fbd3fc8fc7 Implement bus_adjust_resource() for the ia64 nexus driver.
Reviewed by:	marcel
Approved by:	re (kib)
2011-07-18 14:04:37 +00:00
Marcel Moolenaar
08f72ab5dc Don't assume pmap_mapdev() gets called only for memory mapped I/O
addresses (i.e. uncacheable). ACPI in particular uses pmap_mapdev()
rather excessively (number of calls) just to get a valid KVA. To
that end, have pmap_mapdev():
1.  cache the last result so that we don't waste time for multiple
    consecutive invocations with the same PA/SZ.
2.  find the memory descriptor that covers the PA and return NULL
    if none was found or when the PA is for a common DRAM address.
3.  Use either a region 6 or region 7 KVA, in accordance with the
    memory attribute.
2011-07-16 20:34:02 +00:00
Marcel Moolenaar
5b927e4ea9 Don't send EOI to the CPU before we handled the interrupt. This could
potentially trigger multiple pending interrupts for level-sensitive
interrupts.  However, the event timer interrupt does need EOI before
being handled to avoid missing clock events.

These conflicting requirements are handled by having the XIV handler
inform the dispatch code whether or not it send EOI to the CPU. If not,
the dispatch code will do it. This allows handlers to send EOI before
doing potentially long-running activities, while still have a sensible
default behaviour.
2011-07-16 20:16:49 +00:00
Marcel Moolenaar
303c22c53b Add a few more helper functions for working with memory descriptors:
o   efi_md_find() - returns the md that covers the given address
o   efi_md_last() - returns the last md in the list
o   efi_md_prev() - returns the md that preceeds the given md.
2011-07-16 19:56:07 +00:00
Marcel Moolenaar
0eb8c1410a Implement basic support for memory attributes. At this time we only
distinguish between UC and WB memory so that we can map the page to
either a region 6 address (for UC) or a region 7 address (for WB).

This change is only now possible, because previously we would map
regions 6 and 7 with 256MB translations and on top of that had the
kernel mapped in region 7 using a wired translation. The introduction
of the PBVM moved the kernel into its own region and freed up region
7 and allowed us to revert to standard page-sized translations.

This commit inroduces pmap_page_to_va() that respects the attribute.
2011-07-08 16:30:54 +00:00
Marcel Moolenaar
6359509327 Disable PREEMPTION for now. See also PR ia64/147501. 2011-07-04 16:59:26 +00:00
Attilio Rao
470107b2f1 MFC 2011-07-04 11:13:00 +00:00
Alan Cox
80788b2a27 When iterating over a paging queue, explicitly check for PG_MARKER, instead
of relying on zeroed memory being interpreted as an empty PV list.

Reviewed by:	kib
2011-07-02 23:42:04 +00:00
Marcel Moolenaar
c412551667 Change the management of nested faults by switching to physical
addressing while reading or writing the trap frame. It's not
possible to guarantee that the one translation cache entry that
we depend on is not going to get purged by the CPU. We already
know that global shootdowns (ptc.g and/or ptc.ga) can (and will)
cause multiple TC entries to get purged and we initialize tried
to handle that by serializing kernel entry with these operations.
However, we need to serialize kernel exit as well.

But even if we can serialize, it appears that CPU threads within
a core can affect each other's TC entries beyond the global
shootdown. This would mean serializing any and all translatation
cache updates with the threads in a core with the kernel entry
and exit of any thread in that core. This is just too painful
and complicated.

Since we already properly coded for the 2 nested faults that we
can get, all we need to do is use those to obtain the physical
address of the trap frame, switch to physical mode and in that
way eliminate any further faults. The trap frame is already
aligned to 1KB boundaries to make sure we don't cross the page
boundary, this is safe to do.

We still need to serialize ptc.g or ptc.ga across CPUs because
the platform can only have 1 such operation outstanding at the
same time. We can now use a regular (spin) lock for this.

Also, it has been observed that we can get a nested TLB faults
for region 7 virtual addresses. This was unexpected. For now,
we enhance the nested TLB fault handler to deal with those as
well, but it needs to be understood.
2011-06-30 20:34:55 +00:00
Attilio Rao
7b744f6b01 MFC 2011-06-30 10:19:43 +00:00
Alan Cox
6bbee8e28a Add a new option, OBJPR_NOTMAPPED, to vm_object_page_remove(). Passing this
option to vm_object_page_remove() asserts that the specified range of pages
is not mapped, or more precisely that none of these pages have any managed
mappings.  Thus, vm_object_page_remove() need not call pmap_remove_all() on
the pages.

This change not only saves time by eliminating pointless calls to
pmap_remove_all(), but it also eliminates an inconsistency in the use of
pmap_remove_all() versus related functions, like pmap_remove_write().  It
eliminates harmless but pointless calls to pmap_remove_all() that were being
performed on PG_UNMANAGED pages.

Update all of the existing assertions on pmap_remove_all() to reflect this
change.

Reviewed by:	kib
2011-06-29 16:40:41 +00:00
Attilio Rao
cfdfd32d34 MFC 2011-06-26 17:30:46 +00:00
Marcel Moolenaar
191eae8259 Oops. The sec field of struct bintime is *not* a 32-bit type.
It's time_t, which is 64 bits on ia64.
2011-06-25 17:58:35 +00:00
Marcel Moolenaar
3ebd36e3d0 Define the minimum fractional period in terms of hz. We know hz is
a magnitude smaller than itc_freq. A minimum period of 10*hz is
sufficient precision. As a side-effect, the number of clocks per
second, when the machine is idle, dropped by more than 50%.
Be anal and define the maximum period to be at least 4G seconds.
With a 64-bit counter and an ITC frequency that's expected to be
always less than 4Ghz, it takes longer than that to wrap around.
2011-06-25 16:35:43 +00:00
Marcel Moolenaar
dbd57cbf8f Replace the original copyright notice with my own. Everything in
this file is written by me and has no bearing on the initial or
original version.
2011-06-25 03:43:58 +00:00
Marcel Moolenaar
3f5deb80b7 Update copyright. 2011-06-25 03:37:40 +00:00
Marcel Moolenaar
e920e3978e Switch to the event timers infrastructure. This includes:
o   Setting td_intr_frame to the XIVs trap frame because it's referenced
    by the ET event handler.
o   Signal EOI to the CPU before calling the registered XIV handlers.
    This prevents lost ITC interrupts, which cause starvation in one-shot
    mode.
o   Adding support for IPI_HARDCLOCK with corresponding per-CPU counters.
o   Have the APs call cpu_initclocks() so as to limited the scattering of
    clock related initialization. cpu_initclocks() calls the <self>_bsp()
    or <self>_ap() version accordingly.
o   Uncomment the ET clock handling in cpu_idle().
o   Update the DDB 'show pcpu' output for the new MD fields.
o   Entirely rewritten ia64_ih_clock(). Note that we don't create as many
    clock XIVs as we have CPUs, as is done on PowerPC. It doesn't scale.
    We can only have 240 XIVs and we can have more CPUs than that. There's
    a single intrcnt index for the cumulative clock ticks and we keep per
    CPU counts in the PCPU stats structure.
o   Register the ITC by hooking SI_SUB_CONFIGURE (2nd order).

Open issues:
o   Clock interrupts can still be lost. Some tweaking is still necessary.

Thanks to: mav@ for his support, feedback and explanations.

ET stats while committing:
eris% sysctl machdep.cpu | grep nclks

machdep.cpu.0.nclks: 24007
machdep.cpu.1.nclks: 22895
machdep.cpu.2.nclks: 13523
machdep.cpu.3.nclks: 9342
machdep.cpu.4.nclks: 9103
machdep.cpu.5.nclks: 9298
machdep.cpu.6.nclks: 10039
machdep.cpu.7.nclks: 9479
eris% vmstat -i | grep clock
clock                      108599         50
2011-06-25 02:15:14 +00:00
Attilio Rao
de138ec703 MFC 2011-06-24 16:35:40 +00:00
Marcel Moolenaar
ded49c2eae Unblock the outgoing thread after we performed pmap_switch() to
switch the region registers. pmap_switch() returns the pmap for
which the region register are currently programmed, which needs
to be re-programmed on the CPU the ougoing thread gets switched
in.  This change does not noticibly change anything or fix known
bugs, but does give me a warm fuzzy feeling by being more
correct.
2011-06-23 16:21:43 +00:00
Attilio Rao
9b571ec6b3 MFC 2011-06-22 19:42:32 +00:00
Alan Cox
9ed9322551 Use a non-standard page size that is supported. 2011-06-21 12:38:40 +00:00
Attilio Rao
5519971c21 MFC 2011-06-19 14:22:35 +00:00
Marcel Moolenaar
218b719b74 Improve on style(9) 2011-06-17 05:30:12 +00:00
Marcel Moolenaar
acd1d4d28e Properly serialize the global shootdown with the instruction
stream of the local processor. Also explicitly invalidate
the ALAT. This is done on the other CPUs in the coherence
domain by virtue of the ptc.ga instruction, but does not
apply to the local CPU.
2011-06-17 04:26:03 +00:00