Commit Graph

794 Commits

Author SHA1 Message Date
royger
494dc32ba6 ddb: allow specifying the exact address of the symtab and strtab
When the FreeBSD kernel is loaded from Xen the symtab and strtab are
not loaded the same way as the native boot loader. This patch adds
three new global variables to ddb that can be used to specify the
exact position and size of those tables, so they can be directly used
as parameters to db_add_symbol_table. A new helper is introduced, so callers
that used to set ksym_start and ksym_end can use this helper to set the new
variables.

It also adds support for loading them from the Xen PVH port, that was
previously missing those tables.

Sponsored by: Citrix Systems R&D
Reviewed by:	kib

ddb/db_main.c:
 - Add three new global variables: ksymtab, kstrtab, ksymtab_size that
   can be used to specify the position and size of the symtab and
   strtab.
 - Use those new variables in db_init in order to call db_add_symbol_table.
 - Move the logic in db_init to db_fetch_symtab in order to set ksymtab,
   kstrtab, ksymtab_size from ksym_start and ksym_end.

ddb/ddb.h:
 - Add prototype for db_fetch_ksymtab.
 - Declate the extern variables ksymtab, kstrtab and ksymtab_size.

x86/xen/pv.c:
 - Add support for finding the symtab and strtab when booted as a Xen
   PVH guest. Since Xen loads the symtab and strtab as NetBSD expects
   to find them we have to adapt and use the same method.

amd64/amd64/machdep.c:
arm/arm/machdep.c:
i386/i386/machdep.c:
mips/mips/machdep.c:
pc98/pc98/machdep.c:
powerpc/aim/machdep.c:
powerpc/booke/machdep.c:
sparc64/sparc64/machdep.c:
 - Use the newly introduced db_fetch_ksymtab in order to set ksymtab,
   kstrtab and ksymtab_size.
2014-09-25 08:28:10 +00:00
nwhitehorn
fa7d47bc3e We should have an isync after switching MSR[SF] in bootstrap.
Submitted by:	Mark Millard
MFC after:	3 days
2014-09-23 04:13:21 +00:00
kib
094158b3f2 Change pmap_enter(9) interface to take flags parameter and superpage
mapping size (currently unused).  The flags includes the fault access
bits, wired flag as PMAP_ENTER_WIRED, and a new flag
PMAP_ENTER_NOSLEEP to indicate that pmap should not sleep.

For powerpc aim both 32 and 64 bit, fix implementation to ensure that
the requested mapping is created when PMAP_ENTER_NOSLEEP is not
specified, in particular, wait for the available memory required to
proceed.

In collaboration with:	alc
Tested by:	nwhitehorn (ppc aim32 and booke)
Sponsored by:	The FreeBSD Foundation and EMC / Isilon Storage Division
MFC after:	2 weeks
2014-08-08 17:12:03 +00:00
jhibbits
02be90fac3 Set the si_code appropriately for exception-caused signals.
LLDB checks the si_code, and aborts if a code isn't known.

MFC after:	2 weeks
Relnotes:	yes
2014-08-08 06:22:32 +00:00
alc
38b6c535da Retire pmap_change_wiring(). We have never used it to wire virtual pages.
We continue to use pmap_enter() for that.  For unwiring virtual pages, we
now use pmap_unwire(), which unwires a range of virtual addresses instead
of a single virtual page.

Sponsored by:	EMC / Isilon Storage Division
2014-08-03 20:40:51 +00:00
alc
741bd8905a Simplify the selection of the pvo_head and pvo allocation zone in
moea_enter_locked() and moea64_enter().

Eliminate an unused variable from moea64_enter().
2014-08-01 17:09:50 +00:00
alc
0fddfcfca3 Retire PVO_EXECUTABLE. It's neither used nor set correctly. 2014-08-01 04:53:35 +00:00
alc
2672e2483d Correct a long-standing problem in moea{,64}_pvo_enter() that was revealed
by the combination of r268591 and r269134: When we attempt to add the
wired attribute to an existing mapping, moea{,64}_pvo_enter() do nothing.
(They only set the wired attribute on newly created mappings.)

Tested by:	andreast
2014-08-01 01:48:41 +00:00
alc
64de6aa22c Correct a defect in r268591. In the implementation of the new function
pmap_unwire(), the call to MOEA64_PVO_TO_PTE() must be performed before
any changes are made to the PVO.  Otherwise, MOEA64_PVO_TO_PTE() will
panic.

Reported by:	andreast
2014-07-31 16:17:30 +00:00
nwhitehorn
afb6ef5a71 Allow mappings of memory not previously direct-mapped by the kernel when
calling mmap on /dev/mem and add a handler for the possible userland
machine checks that may result. Remove some pointless and wrong copy/paste
that has been in here for a decade as well.

This results in a /dev/mem with identical semantics to the x86 version.

MFC after:	1 week
2014-07-19 15:11:58 +00:00
markj
880dd1a983 Invoke the DTrace trap handler before calling trap() on amd64. This matches
the upstream implementation and helps ensure that a trap induced by tracing
fbt::trap:entry is handled without recursively generating another trap.

This makes it possible to run most (but not all) of the DTrace tests under
common/safety/ without triggering a kernel panic.

Submitted by:	Anton Rang <anton.rang@isilon.com> (original version)
Phabric:	D95
2014-07-14 04:38:17 +00:00
alc
c6e2079985 Eliminate an unused variable. Refresh two comments. 2014-07-13 17:52:07 +00:00
alc
1c51afe84c Implement pmap_unwire(). See r268327 for the motivation behind this change. 2014-07-13 16:27:57 +00:00
alc
a8e6c0a707 Correct the accounting code for wired mappings. The wrong field of the PVO
entry was being tested.  We were incrementing and decrementing the pmap's
wired mapping count based on whether the physical page being mapped or
unmapped was cache coherent, not whether it was a wired mapping.

Reviewed by:	nwhitehorn
2014-07-10 20:55:38 +00:00
markj
4c818572b7 Commit the rest of the changes that were intended to be part of r266826.
X-MFC-with:	r266826
2014-05-29 01:42:22 +00:00
jhibbits
c6555fad83 oea64 uses 4k pages, too.
MFC after:	1 week
X-MFC-with:	r266116
2014-05-15 15:17:44 +00:00
jhibbits
214a5da32e A page mask size is 12-bits, not 11.
MFC after:	1 week
2014-05-15 04:18:06 +00:00
bdrewery
6fcf6199a4 Rename global cnt to vm_cnt to avoid shadowing.
To reduce the diff struct pcu.cnt field was not renamed, so
PCPU_OP(cnt.field) is still used. pc_cnt and pcpu are also used in
kvm(3) and vmstat(8). The goal was to not affect externally used KPI.

Bump __FreeBSD_version_ in case some out-of-tree module/code relies on the
the global cnt variable.

Exp-run revealed no ports using it directly.

No objection from:	arch@
Sponsored by:	EMC / Isilon Storage Division
2014-03-22 10:26:09 +00:00
emaste
dfd2dcdc01 Update NetBSD Foundation copyrights to 2-clause BSD
The NetBSD Foundation states "Third parties are encouraged to change the
license on any files which have a 4-clause license contributed to the
NetBSD Foundation to a 2-clause license."

This change removes clauses 3 and 4 from copyright / license blocks that
list The NetBSD Foundation as the only copyright holder.

Sponsored by:	The FreeBSD Foundation
2014-03-18 01:40:25 +00:00
jhibbits
b57e260317 Unbreak non-SMP builds. This was broken by r259284. Also, reorganize the
code introduced in that revision a bit.

Reviewed by:	nwhitehorn
MFC after:	3 weeks
2014-01-31 03:55:34 +00:00
jhibbits
d106d865ac Use a loop of dcbz, instead of calling bzero() to zero a page. This matches
what is done in mmu_oea64.c.

MFC after:	1 month
2014-01-29 05:58:08 +00:00
jhibbits
72b0bd154f Save r3 before using it for the trap check, else we end up saving the new r3,
containing the trap instruction encoding (0x7c810808), and restoring it back
with the frame on return.  This caused it to panic on my ppc32 machine, but
somehow my ppc64 machine overlooked it, because I was using such a simple
dtrace probe.

X-MFC-with:	r259245
MFC after:	2 weeks
2013-12-15 18:07:25 +00:00
jhibbits
7a0c976f7e Add PMU-based CPU frequency scaling. This method is used on most Titanium
PowerBooks.

MFC after:	1 month
2013-12-13 02:37:35 +00:00
jhibbits
2ff1272b66 FBT now does work fully on PowerPC.
MFC after:	2 weeks
2013-12-12 04:12:19 +00:00
nwhitehorn
95789e5736 The kernel stack guard pages are only below the stack pointer, not above.
Prevent erroneous detection of stack overflows on legitimate faults on the
page after this thread's stack.

MFC after:	3 days
2013-12-01 17:28:28 +00:00
nwhitehorn
b777ab82ba badaddr() is used only in the grackle PCI driver, so move its definition
there. Clean up a spurious setfault() declaration as well.
2013-11-27 22:01:09 +00:00
attilio
7ee4e910ce - For kernel compiled only with KDTRACE_HOOKS and not any lock debugging
option, unbreak the lock tracing release semantic by embedding
  calls to LOCKSTAT_PROFILE_RELEASE_LOCK() direclty in the inlined
  version of the releasing functions for mutex, rwlock and sxlock.
  Failing to do so skips the lockstat_probe_func invokation for
  unlocking.
- As part of the LOCKSTAT support is inlined in mutex operation, for
  kernel compiled without lock debugging options, potentially every
  consumer must be compiled including opt_kdtrace.h.
  Fix this by moving KDTRACE_HOOKS into opt_global.h and remove the
  dependency by opt_kdtrace.h for all files, as now only KDTRACE_FRAMES
  is linked there and it is only used as a compile-time stub [0].

[0] immediately shows some new bug as DTRACE-derived support for debug
in sfxge is broken and it was never really tested.  As it was not
including correctly opt_kdtrace.h before it was never enabled so it
was kept broken for a while.  Fix this by using a protection stub,
leaving sfxge driver authors the responsibility for fixing it
appropriately [1].

Sponsored by:	EMC / Isilon storage division
Discussed with:	rstone
[0] Reported by:	rstone
[1] Discussed with:	philip
2013-11-25 07:38:45 +00:00
andreast
c2f1851691 Save and restore the trap vectors when doing OF calls on pSeries machines.
It turned out that on pSeries machines the call into OF modified the trap
vectors and this made further behaviour unpredictable.

With this commit I'm now able to boot multi user on a network booted
environment on my IntelliStation 285. This is a POWER5+ machine.

Discussed with:		nwhitehorn
MFC after:	1 week
2013-11-23 18:58:17 +00:00
jhibbits
bb668ab52a Remove stale comment. The PID provider is handled elsewhere already. 2013-11-21 06:54:28 +00:00
nwhitehorn
4db5557688 Do not assume a value for #address-cells when parsing the OF translations
map. This allows the kernel to get farther with OpenBIOS on 64-bit CPUs.
2013-11-17 18:03:03 +00:00
nwhitehorn
f754a8eebe Unify handling of illegal instruction faults between AIM and Book-E. This
allows FPU emulation on AIM as well as providing support for the mfpvr
and lwsync instructions from userland on e500 cores. lwsync, in particular,
is required for many C++ programs to work correctly.

MFC after:	1 week
2013-11-17 15:12:03 +00:00
jhibbits
874c517764 Fix copy+paste-o, OEA64 uses LPTE, not PTE.
X-MFC with:	r257941
2013-11-14 07:41:52 +00:00
nwhitehorn
b136bd67d8 Use the same implementation of copyinout.c for both AIM and Book-E. This
fixes some bugs in both implementations related to validity checks on
mapping bounds.
2013-11-11 23:37:16 +00:00
nwhitehorn
a1b4155638 Follow up r223485, which made AIM use the ABI thread pointer instead of
PCPU fields for curthread, by doing the same to Book-E. This closes
some potential races switching between CPUs. As a side effect, it turns out
the AIM and Book-E swtch.S implementations were the same to within a few
registers, so move that to powerpc/powerpc.

MFC after: 3 months
2013-11-11 17:37:50 +00:00
jhibbits
95e5132b64 Add the necessary bits for dumps on ppc64.
MFC after:	2 weeks
2013-11-11 03:17:38 +00:00
markj
a5fb1fbfd8 Remove references to an unused fasttrap probe hook, and remove the
corresponding x86 trap type. Userland DTrace probes are currently handled
by the other fasttrap hooks (dtrace_pid_probe_ptr and
dtrace_return_probe_ptr).

Discussed with:	rpaulo
2013-10-31 02:35:00 +00:00
nwhitehorn
00c1fadd81 Add some extra sanity checking and checks to printf format specifiers. 2013-10-26 18:19:36 +00:00
nwhitehorn
26c2b7ea5e Interrelated improvements to early boot mappings:
- Remove explicit requirement that the SOC registers be found except as an
  optimization (although the MPC85XX LAW drivers still require they be found
  externally, which should change).
- Remove magic CCSRBAR_VA value.
- Allow bus_machdep.c's early-boot code to handle non 1:1 mappings and
  systems not in real-mode or global 1:1 maps in early boot.
- Allow pmap_mapdev() on Book-E to reissue previous addresses if the
  area is already mapped. Additionally have it check all mappings, not
  just the CCSR area.

This allows the console on e500 systems to actually work on systems where
the boot loader was not kind enough to set up a 1:1 mapping before starting
the kernel.
2013-10-26 18:18:14 +00:00
nwhitehorn
285be8a709 Clean up missed header references. 2013-10-26 17:54:31 +00:00
nwhitehorn
d0ef44bd3a Since the PS3 port was committed, the AIM nexus device works perfectly fine
on all PowerPC platforms, whether or not they have Open Firmware. Remove
some more duplication and have there be only one nexus driver.
2013-10-20 18:40:55 +00:00
nwhitehorn
abd243270e Replace the two almost-exactly-identical AIM and Book-E clock.c
implementations with a single one after the application of a very small
amount of #ifdef.
2013-10-20 16:37:03 +00:00
nwhitehorn
41c4967a72 Unify the AIM and Book-E vm_machdep.c implementations, which previously
differed only with respect to the AIM version not following style(9) and
some additional features for 64-bit systems and machines with direct maps
in the AIM implementation that are no-ops on Book-E (at least for now).
2013-10-20 16:14:03 +00:00
jhibbits
99ca70f361 Fix the Wii build, and remove an extraneous critical_enter(). 2013-10-16 04:11:42 +00:00
jhibbits
0b9629ab6a Add fasttrap for PowerPC. This is the last piece of the dtrace/ppc puzzle.
It's incomplete, it doesn't contain full instruction emulation, but it should be
sufficient for most cases.

MFC after:	1 month
2013-10-15 15:00:29 +00:00
jhibbits
3b8af4143e Move the PMC handling to the first level interrupt handler where it belongs.
Also add the pmc_hook use, to handle callchain tracing.

MFC after:	1 week
2013-10-15 14:52:44 +00:00
glebius
12fb397079 - Create kern.ipc.sendfile namespace, and put the new "readhead" OID
there as "kern.ipc.sendfile.readahead".
- Push all nsfbuf related tunables into MD code. Don't move them
  to new namespace in favor of POLA.

Reviewed by:	scottl
Approved by:	re (gjb)
2013-09-22 13:36:52 +00:00
alc
88a4d0f31a The pmap function pmap_clear_reference() is no longer used. Remove it.
pmap_clear_reference() has had exactly one caller in the kernel for
several years, more precisely, since FreeBSD 8.  Now, that call no
longer exists.

Approved by:	re (kib)
Sponsored by:	EMC / Isilon Storage Division
2013-09-20 04:30:18 +00:00
nwhitehorn
a19fbd832b Change VM object lock assertion to match locking higher in the call
chain. This repairs a panic observed during pageout on some 64-bit
PowerPC systems.

Submitted by:	grehan
Approved by:	re (kib)
MFC after:	2 weeks
Revisit after:	10.0
2013-09-13 01:12:45 +00:00
nwhitehorn
b2fa807b0e Raise artificial limits on number of CPUs and number of interrupts.
Approved by:	re (kib)
2013-09-09 12:52:34 +00:00
nwhitehorn
d54687609c Add POWER CPUs to the kernel's knowledge. This does not imply we currently
actually run on any machines with POWER CPUs but avoids closing that door
unnecessarily.

Approved by:	re (kib)
2013-09-09 12:51:24 +00:00