Commit Graph

683 Commits

Author SHA1 Message Date
Andreas Tobler
179e996c9f Revert the _NOPROF entries on cpu_throw, cpu_switch and savectx. They can be
profiled too now.

MFC after:	2 weeks
2012-02-05 15:59:18 +00:00
Konstantin Belousov
75ce221fa1 Fix build for the case of powerpc64 kernel without COMPAT_FREEBSD32.
MFC after:	2 months
2012-01-30 19:31:17 +00:00
Konstantin Belousov
62c625fdd2 Finally, try to enable the nxstacks on amd64 and powerpc64 for both 64bit
and 32bit ABIs. Also try to enable nxstacks for PAE/i386 when supported,
and some variants of powerpc32.

MFC after:	2 months (if ever)
2012-01-30 07:56:00 +00:00
Andreas Tobler
9eab2f146a This commit adds profiling support for powerpc64. Now we can do application
profiling and kernel profiling. To enable kernel profiling one has to build
kgmon(8). I will enable the build once I managed to build and test powerpc
(32-bit) kernels with profiling support.

- add a powerpc64 PROF_PROLOGUE for _mcount.
- add macros to avoid adding the PROF_PROLOGUE in certain assembly entries.
- apply these macros where needed.
- add size information to the MCOUNT function.

MFC after:	3 weeks, together with r230291
2012-01-20 22:34:19 +00:00
Nathan Whitehorn
ae09ab8f63 Rework SLB trap handling so that double-faults into an SLB trap handler are
possible, and double faults within an SLB trap handler are not. The result
is that it possible to take an SLB fault at any time, on any address, for
any reason, at any point in the kernel.

This lets us do two important things. First, it removes the (soft) 16 GB RAM
ceiling on PPC64 as well as any architectural limitations on KVA space.
Second, it lets the kernel tolerate poorly designed hypervisors that
have a tendency to fail to restore the SLB properly after a hypervisor
context switch.

MFC after:	6 weeks
2012-01-15 00:08:14 +00:00
Justin Hibbits
7b25dcca76 Implement hwpmc counting PMC support for PowerPC G4+ (MPC745x/MPC744x).
Sampling is in progress.

Approved by:	nwhitehorn (mentor)
MFC after:	9.0-RELEASE
2011-12-24 19:34:52 +00:00
Nathan Whitehorn
e347e23bfe Allow this to work on embedded systems without Open Firmware by making
lack of a /chosen non-fatal, and manually removing memory in use by the
kernel from the physical memory map.

Submitted by:	rpaulo
2011-12-16 23:46:05 +00:00
Nathan Whitehorn
b059c637fb Zero BSS on start, in case the ELF loader that started the kernel did not
do this for us. This can happen on some embedded systems.

Submitted by:	rpaulo
2011-12-16 23:40:56 +00:00
Alan Cox
3b03ca3bbe Eliminate vestiges of page coloring. 2011-12-15 05:07:16 +00:00
Nathan Whitehorn
598d99ddee Keep track of PVO entries in each pmap, which allows much faster
pmap_remove() for large sparse requests. This can prevent pmap_remove()
operations on 64-bit process destruction or swapout that would take
several hundred times the lifetime of the universe to complete. This
behavior is largely indistinguishable from a hang.
2011-12-11 17:19:48 +00:00
Marius Strobl
4b7ec27007 - There's no need to overwrite the default device method with the default
one. Interestingly, these are actually the default for quite some time
  (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9)
  since r52045) but even recently added device drivers do this unnecessarily.
  Discussed with: jhb, marcel
- While at it, use DEVMETHOD_END.
  Discussed with: jhb
- Also while at it, use __FBSDID.
2011-11-22 21:28:20 +00:00
Nathan Whitehorn
a897298940 Use a global __pure2 function instead of a global register variable for
curthread, like on x86 and sparc64. This makes the kernel somewhat more
clang friendly, which doesn't support global register variables.
2011-11-17 15:49:42 +00:00
Nathan Whitehorn
46e93cbbc5 Add an extra invariant here which was useful on 64-bit CPUs. 2011-11-17 15:48:12 +00:00
Alan Cox
fbd80bd047 Refactor the code that performs physically contiguous memory allocation,
yielding a new public interface, vm_page_alloc_contig().  This new function
addresses some of the limitations of the current interfaces, contigmalloc()
and kmem_alloc_contig().  For example, the physically contiguous memory that
is allocated with those interfaces can only be allocated to the kernel vm
object and must be mapped into the kernel virtual address space.  It also
provides functionality that vm_phys_alloc_contig() doesn't, such as wiring
the returned pages.  Moreover, unlike that function, it respects the low
water marks on the paging queues and wakes up the page daemon when
necessary.  That said, at present, this new function can't be applied to all
types of vm objects.  However, that restriction will be eliminated in the
coming weeks.

From a design standpoint, this change also addresses an inconsistency
between vm_phys_alloc_contig() and the other vm_phys_alloc*() functions.
Specifically, vm_phys_alloc_contig() manipulated vm_page fields that other
functions in vm/vm_phys.c didn't.  Moreover, vm_phys_alloc_contig() knew
about vnodes and reservations.  Now, vm_page_alloc_contig() is responsible
for these things.

Reviewed by:	kib
Discussed with:	jhb
2011-11-16 16:46:09 +00:00
Nathan Whitehorn
8a4cf006f4 Fix a bug where the pmap_cpu_bootstrap() ap argument could be clobbered.
Luckily, it mostly wasn't important, so this didn't cause major problems.
Also improve register reuse when setting up trap frames very slightly.

Submitted by:	Justin Hibbits <chmeeedalf at gmail dot com>
MFC after:	5 days
2011-11-09 13:48:23 +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
Andreas Tobler
42f2270475 This a follow up commit from r224216 for powerpc 32-bit. Increase
the storage size for sintrcnt/sintrnames to .long.

Reviewed by: nwhitehorn
Approved by: re (kib)
2011-07-25 20:10:01 +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
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
Attilio Rao
cfdfd32d34 MFC 2011-06-26 17:30:46 +00:00
Nathan Whitehorn
1b17fa33dc Revert r223479. It is unnecessary and served only to slightly ameliorate
some manifestations of the bug actually fixed in r223485.
2011-06-26 15:08:14 +00:00
Attilio Rao
de138ec703 MFC 2011-06-24 16:35:40 +00:00
Nathan Whitehorn
e69dff491d Use the ABI-mandated thread pointer register (r2 for ppc32, r13 for ppc64)
instead of a PCPU field for curthread. This averts a race on SMP systems
with a high interrupt rate where the thread looking up the value of
curthread could be preempted and migrated between obtaining the PCPU
pointer and reading the value of pc_curthread, resulting in curthread being
observed to be the current thread on the thread's original CPU. This played
merry havoc with the system, in particular with mutexes. Many thanks to
jhb for helping me work this one out.

Note that Book-E is in principle susceptible to the same problem, but has
not been modified yet due to lack of Book-E hardware.

MFC after:	2 weeks
2011-06-23 22:21:28 +00:00
Nathan Whitehorn
045aee08f3 Clear any outstanding atomic reservations when traps are taken. This fixes
some interesting bugs (mostly on SMP systems) with atomic operations
silently failing in interrupt heavy situations, especially when using
overflow pages.
2011-06-23 16:34:41 +00:00
Andreas Tobler
dcf496e844 Fix merge typo. 2011-06-23 09:46:12 +00:00
Attilio Rao
c7c2767e33 Remove pc_other_cpus and pc_cpumask usage from powerpc support.
Tested and reviewed by:	andreast
2011-06-16 07:27:13 +00:00
Attilio Rao
3bce356ea4 MFC 2011-06-04 22:05:20 +00:00
Nathan Whitehorn
4770f5380e Fix a typo derived from a mismerge from mmu_oea that would cause
pmap_sync_icache() to sync random (possibly uncached or nonexisting!)
memory, causing kernel page faults or machine checks, most easily
triggered by using GDB. While here, add an additional safeguard to only
sync cacheable memory.

MFC after:	2 days
2011-06-04 03:22:16 +00:00
Attilio Rao
d7073a2b3b MFC 2011-06-03 17:09:15 +00:00
Nathan Whitehorn
cd507188bc Quantities stored on the stack on ppc64 tend to be twice as large as on
ppc32, so make the early stack correspondingly twice as big.
2011-06-03 00:11:13 +00:00
Nathan Whitehorn
17763042e4 The POWER7 has only 32 SLB slots instead of 64, like other supported
64-bit PowerPC CPUs. Add infrastructure to support variable numbers of
SLB slots and move the user slot from 63 to 0, so that it is always
available.
2011-06-02 14:25:52 +00:00
Nathan Whitehorn
1dff98d9bb If running under a hypervisor, don't yell at the user about starting
unknown CPU types, instead relying on the hypervisor to have given us a
reasonable environment.
2011-06-02 14:23:36 +00:00
Nathan Whitehorn
20ae1015b9 Explicitly initialize the first thread's MSR to PSL_KERNSET. 2011-06-02 14:21:20 +00:00
Nathan Whitehorn
6dd24ab3f1 Include the modules area in the mapped kernel code. This fixes the kernel's
access to modules and loader metadata when started from real mode, but
without a direct map.
2011-06-02 14:19:18 +00:00
Nathan Whitehorn
97f7cde42c Remove some dead code: unnecessary isyncs and memory sorting, which are
handled in mtmsr() and mem_regions(), respectively.
2011-06-02 14:15:44 +00:00
Nathan Whitehorn
1787909001 MFpseries:
Renovate and improve the AIM Open Firmware support:
- Add RTAS (Run-Time Abstraction Services) support, found on all IBM systems
  and some Apple ones
- Improve support for 32-bit real mode Open Firmware systems
- Pull some more OF bits over from the AIM directory
- Fix memory detection on IBM LPARs and systems with more than one /memory
  node (by andreast@)
2011-06-02 14:12:37 +00:00
Attilio Rao
7fcdc9a26f MFC 2011-05-26 17:38:00 +00:00
Nathan Whitehorn
2ec6a5984c Add a missing isync. 2011-05-26 14:34:22 +00:00
Attilio Rao
7e7a34e520 MFC 2011-05-16 16:34:03 +00:00
Nathan Whitehorn
43db7b0eab Remove a useless check that served only to make 64-bit PPC systems
unbootable after r221855.

Submitted by:	andreast
MFC after:	1 week
2011-05-16 03:32:40 +00:00
Attilio Rao
c47dd3db8c Add the powerpc support.
Note that there is a dirty hack for calling openpic_write(), but
nwhitehorn approved it.

Discussed with:	nwhitehorn
2011-05-09 16:16:15 +00:00
Andreas Tobler
c819dfaeba Add leading zeros when printing the physical memory chunks on __powerpc64__.
Approved by:	nwhitehorn (mentor)
2011-04-19 07:49:58 +00:00
Andreas Tobler
415a54c8c5 Adjust debugging string to match the actual function.
Approved by: nwhitehorn (mentor)
2011-04-14 19:37:31 +00:00
Andreas Tobler
8fd7d65779 The macro MOEA_PVO_CHECK is empty and not used. It is a left over from the
NetBSD import. Remove the definition and all its occurrences.

Approved by: nwhitehorn (mentor)
2011-04-14 18:26:50 +00:00
Matthew D Fleming
c77715ef6c Mostly revert r219468, as I had misremembered the C standard regarding
the size of an extern array.

Keep one change from strncpy to strlcpy.
2011-03-11 18:56:55 +00:00
Matthew D Fleming
cd67ac41ae Use MAXPATHLEN rather than the size of an extern array when copying the
kernel name.  Also consistenly use strlcpy().

Suggested by:	Warner Losh
2011-03-10 22:56:00 +00:00
Nathan Whitehorn
79c77d726e Turn off default generation of userland dot symbols on powerpc64 now that
we have a binutils that supports it. Kernel dot symbols remain on to assist
DDB.
2011-02-18 21:44:53 +00:00
Dmitry Chagin
a5c1afadeb Add macro to test the sv_flags of any process. Change some places to test
the flags instead of explicit comparing with address of known sysentvec
structures.

MFC after:	1 month
2011-01-26 20:03:58 +00:00