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331722 |
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29-Mar-2018 |
eadler |
Revert r330897:
This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code.
Revert with prejudice.
This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes.
Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes.
Requested by: gjb (re)
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#
330897 |
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14-Mar-2018 |
eadler |
Partial merge of the SPDX changes
These changes are incomplete but are making it difficult to determine what other changes can/should be merged.
No objections from: pfg
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302408 |
|
07-Jul-2016 |
gjb |
Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle. Prune svn:mergeinfo from the new branch, as nothing has been merged here.
Additional commits post-branch will follow.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
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301961 |
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16-Jun-2016 |
kib |
Update comments for the MD functions managing contexts for new threads, to make it less confusing and using modern kernel terms.
Rename the functions to reflect current use of the functions, instead of the historic KSE conventions: cpu_set_fork_handler -> cpu_fork_kthread_handler (for kthreads) cpu_set_upcall -> cpu_copy_thread (for forks) cpu_set_upcall_kse -> cpu_set_upcall (for new threads creation)
Reviewed by: jhb (previous version) Sponsored by: The FreeBSD Foundation MFC after: 1 week Approved by: re (hrs) Differential revision: https://reviews.freebsd.org/D6731
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291442 |
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29-Nov-2015 |
nwhitehorn |
Make ELFv2 powerpc64 kernels build and run. Loader support will come in a separate commit.
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#
277334 |
|
18-Jan-2015 |
nwhitehorn |
Refactor PowerPC (especially AIM) init sequence to be less baroque.
MFC after: 2 months
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269577 |
|
05-Aug-2014 |
glebius |
Merge all MD sf_buf allocators into one MI, residing in kern/subr_sfbuf.c The MD allocators were very common, however there were some minor differencies. These differencies were all consolidated in the MI allocator, under ifdefs. The defines from machine/vmparam.h turn on features required for a particular machine. For details look in the comment in sys/sf_buf.h.
As result no MD code left in sys/*/*/vm_machdep.c. Some arches still have machine/sf_buf.h, which is usually quite small.
Tested by: glebius (i386), tuexen (arm32), kevlo (arm32) Reviewed by: kib Sponsored by: Netflix Sponsored by: Nginx, Inc.
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256792 |
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20-Oct-2013 |
nwhitehorn |
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).
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255786 |
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22-Sep-2013 |
glebius |
- 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)
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255273 |
|
05-Sep-2013 |
nwhitehorn |
Align stacks of kernel threads correctly at 16-byte boundaries rather than making sure they are all misaligned at +8 bytes. This fixes clang builds of powerpc64 kernels (aside from a required increase in KSTACK_PAGES which will come later).
This commit from FreeBSD/powerpc64 with a clang-built kernel.
MFC after: 2 weeks
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254025 |
|
07-Aug-2013 |
jeff |
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
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253351 |
|
15-Jul-2013 |
ae |
Introduce new structure sfstat for collecting sendfile's statistics and remove corresponding fields from struct mbstat. Use PCPU counters and SFSTAT_INC() macro for update these statistics.
Discussed with: glebius
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217561 |
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18-Jan-2011 |
kib |
For architectures not using direct map , and requiring real KVA page for sf buf allocation, use wakeup() instead of wakeup_one() to notify sf buffer waiters about free buffer.
sf_buf_alloc() calls msleep(PCATCH) when SFB_CATCH flag was given, and for simultaneous wakeup and signal delivery, msleep() returns EINTR/ERESTART despite the thread was selected for wakeup_one(). As result, we loose a wakeup, and some other waiter will not be woken up.
Reported and tested by: az Reviewed by: alc, jhb MFC after: 1 week
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217065 |
|
06-Jan-2011 |
andreast |
Remove unused variables. Spotted by a cppcheck (devel/cppcheck, http://sourceforge.net/projects/cppcheck) run.
Approved by: nwhitehorn (mentor)
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214574 |
|
30-Oct-2010 |
nwhitehorn |
Restructure the way the copyin/copyout segment is stored to prevent a concurrency bug. Since all SLB/SR entries were invalidated during an exception, a decrementer exception could cause the user segment to be invalidated during a copyin()/copyout() without a thread switch that would cause it to be restored from the PCB, potentially causing the operation to continue on invalid memory. This is now handled by explicit restoration of segment 12 from the PCB on 32-bit systems and a check in the Data Segment Exception handler on 64-bit.
While here, cause copyin()/copyout() to check whether the requested user segment is already installed, saving some pipeline flushes, and fix the synchronization primitives around the mtsr and slbmte instructions to prevent accessing stale segments.
MFC after: 2 weeks
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212054 |
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31-Aug-2010 |
nwhitehorn |
Restructure how reset and poweroff are handled on PowerPC systems, since the existing code was very platform specific, and broken for SMP systems trying to reboot from KDB.
- Add a new PLATFORM_RESET() method to the platform KOBJ interface, and migrate existing reset functions into platform modules. - Modify the OF_reboot() routine to submit the request by hand to avoid the IPIs involved in the regular openfirmware() routine. This fixes reboot from KDB on SMP machines. - Move non-KDB reset and poweroff functions on the Powermac platform into the relevant power control drivers (cuda, pmu, smu), instead of using them through the Open Firmware backdoor. - Rename platform_chrp to platform_powermac since it has become increasingly Powermac specific. When we gain support for IBM systems, we will grow a new platform_chrp.
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209975 |
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13-Jul-2010 |
nwhitehorn |
MFppc64:
Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
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#
209950 |
|
12-Jul-2010 |
nwhitehorn |
Unify ABI-related bits of the Book-E and AIM machdep routines (exec_setregs, etc.) in order to simplify the addition of 64-bit support, and possible future extension of the Book-E code to handle hard floating point and Altivec.
MFC after: 1 month
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209812 |
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08-Jul-2010 |
nwhitehorn |
Replace the existing PowerPC busdma implementation with the one from amd64 (with slight modifications). This provides support for bounce buffers, which are required on systems with RAM above 4 GB.
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199135 |
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10-Nov-2009 |
kib |
Extract the code that records syscall results in the frame into MD function cpu_set_syscall_retval().
Suggested by: marcel Reviewed by: marcel, davidxu PowerPC, ARM, ia64 changes: marcel Sparc64 tested and reviewed by: marius, also sunv reviewed MIPS tested by: gonzo MFC after: 1 month
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192067 |
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13-May-2009 |
nwhitehorn |
Factor out platform dependent things unrelated to device drivers into a new platform module. These are probed in early boot, and have the responsibility of determining the layout of physical memory, determining the CPU timebase frequency, and handling the zoo of SMP mechanisms found on PowerPC.
Reviewed by: marcel, raj Book-E parts by: raj
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190681 |
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03-Apr-2009 |
nwhitehorn |
Add support for 64-bit PowerPC CPUs operating in the 64-bit bridge mode provided, for example, on the PowerPC 970 (G5), as well as on related CPUs like the POWER3 and POWER4.
This also adds support for various built-in hardware found on Apple G5 hardware (e.g. the IBM CPC925 northbridge).
Reviewed by: grehan
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#
182486 |
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30-Aug-2008 |
marcel |
Whitespace fixes.
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#
178628 |
|
27-Apr-2008 |
marcel |
MFp4: SMP support
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#
177091 |
|
12-Mar-2008 |
jeff |
Remove kernel support for M:N threading.
While the KSE project was quite successful in bringing threading to FreeBSD, the M:N approach taken by the kse library was never developed to its full potential. Backwards compatibility will be provided via libmap.conf for dynamically linked binaries and static binaries will be broken.
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176742 |
|
02-Mar-2008 |
raj |
Unify and generalize PowerPC headers, adjust AIM code accordingly.
Rework of this area is a pre-requirement for importing e500 support (and other PowerPC core variations in the future). Mainly the following headers are refactored so that we can cover for low-level differences between various machines within PowerPC architecture:
<machine/pcpu.h> <machine/pcb.h> <machine/kdb.h> <machine/hid.h> <machine/frame.h>
Areas which use the above are adjusted and cleaned up.
Credits for this rework go to marcel@
Approved by: cognet (mentor) MFp4: e500
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174599 |
|
14-Dec-2007 |
marcel |
Forced commit to record that this file was repocopied from src/sys/powerpc/powerpc and modified for its new location.
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173615 |
|
14-Nov-2007 |
marcel |
o Rename cpu_thread_setup() to cpu_thread_alloc() to better communicate that it relates to (is called by) thread_alloc() o Add cpu_thread_free() which is called from thread_free() to counter-act cpu_thread_alloc().
i386: Have cpu_thread_free() call cpu_thread_clean() to preserve behaviour. ia64: Have cpu_thread_free() call mtx_destroy() for the mutex initialized in cpu_thread_alloc().
PR: ia64/118024
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172887 |
|
22-Oct-2007 |
grehan |
Cut over to ULE on PowerPC
kern/sched_ule.c - Add __powerpc__ to the list of supported architectures
powerpc/conf/GENERIC - Swap SCHED_4BSD with SCHED_ULE
powerpc/powerpc/genassym.c - Export TD_LOCK field of thread struct
powerpc/powerpc/swtch.S - Handle new 3rd parameter to cpu_switch() by updating the old thread's lock. Note: uniprocessor-only, will require modification for MP support.
powerpc/powerpc/vm_machdep.c - Set 3rd param of cpu_switch to mutex of old thread's lock, making the call a no-op.
Reviewed by: marcel, jeffr (slightly older version)
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170363 |
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06-Jun-2007 |
grehan |
Fix the compile. Band-aid until it is worked out how to use the context switch api on ppc.
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#
170305 |
|
04-Jun-2007 |
jeff |
- 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)
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#
165608 |
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28-Dec-2006 |
marcel |
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.
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#
161797 |
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01-Sep-2006 |
marcel |
In cpu_set_user_tls(), properly set the thread pointer. It is 0x7000 bytes after the end of the TCB, which is itself 8 bytes.
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#
158651 |
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16-May-2006 |
phk |
Since DELAY() was moved, most <machine/clock.h> #includes have been unnecessary.
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#
147889 |
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10-Jul-2005 |
davidxu |
Validate if the value written into {FS,GS}.base is a canonical address, writting non-canonical address can cause kernel a panic, by restricting base values to 0..VM_MAXUSER_ADDRESS, ensuring only canonical values get written to the registers.
Reviewed by: peter, Josepha Koshy < joseph.koshy at gmail dot com > Approved by: re (scottl)
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#
145433 |
|
23-Apr-2005 |
davidxu |
Change cpu_set_kse_upcall to more generic style, so we can reuse it in other codes. Add cpu_set_user_tls, use it to tweak user register and setup user TLS. I ever wanted to merge it into cpu_set_kse_upcall, but since cpu_set_kse_upcall is also used by M:N threads which may not need this feature, so I wrote a separated cpu_set_user_tls.
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#
144637 |
|
04-Apr-2005 |
jhb |
Divorce critical sections from spinlocks. Critical sections as denoted by critical_enter() and critical_exit() are now solely a mechanism for deferring kernel preemptions. They no longer have any affect on interrupts. This means that standalone critical sections are now very cheap as they are simply unlocked integer increments and decrements for the common case.
Spin mutexes now use a separate KPI implemented in MD code: spinlock_enter() and spinlock_exit(). This KPI is responsible for providing whatever MD guarantees are needed to ensure that a thread holding a spin lock won't be preempted by any other code that will try to lock the same lock. For now all archs continue to block interrupts in a "spinlock section" as they did formerly in all critical sections. Note that I've also taken this opportunity to push a few things into MD code rather than MI. For example, critical_fork_exit() no longer exists. Instead, MD code ensures that new threads have the correct state when they are created. Also, we no longer try to fixup the idlethreads for APs in MI code. Instead, each arch sets the initial curthread and adjusts the state of the idle thread it borrows in order to perform the initial context switch.
This change is largely a big NOP, but the cleaner separation it provides will allow for more efficient alternative locking schemes in other parts of the kernel (bare critical sections rather than per-CPU spin mutexes for per-CPU data for example).
Reviewed by: grehan, cognet, arch@, others Tested on: i386, alpha, sparc64, powerpc, arm, possibly more
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#
140256 |
|
14-Jan-2005 |
jhb |
- Remove some OBE comments regarding cpu_exit(). cpu_exit() is no longer the last action of kern_exit(). Instead, it is a MD callout to cleanup per-process state during exit. - Add notes of concern to Alpha and ia64 about the possible need to drop fp state in cpu_thread_exit() rather than in cpu_exit() since it is per-thread state rather than per-process.
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#
139825 |
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07-Jan-2005 |
imp |
/* -> /*- for license, minor formatting changes
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138129 |
|
27-Nov-2004 |
das |
Don't include sys/user.h merely for its side-effect of recursively including other headers.
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132520 |
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21-Jul-2004 |
grehan |
Update the callframe structure to leave space for the frame pointer and saved link register as per the ABI call sequence. Update code that uses this (fork_trampoline etc) to use the correct genassym'd offsets.
This fixes the 'invalid LR' message when backtracing kernel threads in DDB.
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129750 |
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26-May-2004 |
tmm |
Retire cpu_sched_exit(); it is not used any more.
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#
128395 |
|
18-Apr-2004 |
alc |
MFamd64 Simplify the sf_buf implementation. In short, make it a veneer over the direct virtual-to-physical mapping.
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#
127788 |
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03-Apr-2004 |
alc |
In some cases, sf_buf_alloc() should sleep with pri PCATCH; in others, it should not. Add a new parameter so that the caller can specify which is the case.
Reported by: dillon
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127618 |
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30-Mar-2004 |
benno |
Replace td2 with td on the assumption that this was a typo. This should at least unbreak the build.
Pointy hat to: peter Not tested either by: benno
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127582 |
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29-Mar-2004 |
peter |
Finish tidying up a couple of leftovers from the KSTACK_PAGES stuff. Some files still #included the opt_ file. powerpc hadn't been updated yet.
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127086 |
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16-Mar-2004 |
alc |
Refactor the existing machine-dependent sf_buf_free() into a machine- dependent function by the same name and a machine-independent function, sf_buf_mext(). Aside from the virtue of making more of the code machine- independent, this change also makes the interface more logical. Before, sf_buf_free() did more than simply undo an sf_buf_alloc(); it also unwired and if necessary freed the page. That is now the purpose of sf_buf_mext(). Thus, sf_buf_alloc() and sf_buf_free() can now be used as a general-purpose emphemeral map cache.
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126474 |
|
02-Mar-2004 |
grehan |
Kernel changes for libthr (and probably libpthread).
include/ucontext.h - remove trapframe and switch over to 'generic' description of machine state. Include version field to help with future modifications. Include floating point and altivec state, and hopefully align correctly
powerpc/copyinout.c - fill out casuptr() sync primitive, required by kern_umtx.c
powerpc/machdep.c - shifted proc0/thread0/pcpu setup to before cninit, since syscons -> make_dev -> devlock requires a valid curthread - implemented get_mcontext/set_mcontext - recast sendsig/sigreturn to use get/set_mcontext and new ucontext struct. floating point now saved - TODO: save/restore altivec state
powerpc/vm_machdep.c - implemented cpu_thread_setup/cpu_set_upcall/cpu_set_upcall_kse - eliminated trailing whitespace
Submitted by: Suleiman Souhlal <refugee@segfaulted.com>, ucontext by grehan
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123929 |
|
28-Dec-2003 |
silby |
Track three new sendfile-related statistics: - The number of times sendfile had to do disk I/O - The number of times sfbuf allocation failed - The number of times sfbuf allocation had to wait
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123920 |
|
27-Dec-2003 |
silby |
Move the declaration of sfbufspeak and sfbufsused to mbuf.h, and use imax instead of max, as sfbufspeak and sfbufsused are signed.
Submitted by: bde
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123884 |
|
27-Dec-2003 |
silby |
Track current and peak sfbuf usage, export the values via sysctl.
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#
122821 |
|
16-Nov-2003 |
alc |
- Remove unnecessary synchronization from sf_buf_init(). (There is only one active CPU when sf_buf_init() is performed.)
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122780 |
|
16-Nov-2003 |
alc |
- Modify alpha's sf_buf implementation to use the direct virtual-to- physical mapping. - Move the sf_buf API to its own header file; make struct sf_buf's definition machine dependent. In this commit, we remove an unnecessary field from struct sf_buf on the alpha, amd64, and ia64. Ultimately, we may eliminate struct sf_buf on those architecures except as an opaque pointer that references a vm page.
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#
119563 |
|
29-Aug-2003 |
alc |
Migrate the sf_buf allocator that is used by sendfile(2) and zero-copy sockets into machine-dependent files. The rationale for this migration is illustrated by the modified amd64 allocator. It uses the amd64's direct map to avoid emphemeral mappings in the kernel's address space. On an SMP, the emphemeral mappings result in an IPI for TLB shootdown for each transmitted page. Yuck.
Maintainers of other 64-bit platforms with direct maps should be able to use the amd64 allocator as a reference implementation.
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#
119004 |
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16-Aug-2003 |
marcel |
In vm_thread_swap{in|out}(), remove the alpha specific conditional compilation and replace it with a call to cpu_thread_swap{in|out}(). This allows us to add similar code on ia64 without cluttering the code even more.
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#
118893 |
|
14-Aug-2003 |
grehan |
Update powerpc to use the (old thread,new thread) calling convention for cpu_throw() and cpu_switch().
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#
118239 |
|
30-Jul-2003 |
peter |
Deal with 'options KSTACK_PAGES' being a global option.
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#
116188 |
|
11-Jun-2003 |
peter |
GC unused cpu_wait() function
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#
115858 |
|
04-Jun-2003 |
marcel |
Change the second (and last) argument of cpu_set_upcall(). Previously we were passing in a void* representing the PCB of the parent thread. Now we pass a pointer to the parent thread itself. The prime reason for this change is to allow cpu_set_upcall() to copy (parts of) the trapframe instead of having it done in MI code in each caller of cpu_set_upcall(). Copying the trapframe cannot always be done with a simply bcopy() or may not always be optimal that way. On ia64 specifically the trapframe contains information that is specific to an entry into the kernel and can only be used by the corresponding exit from the kernel. A trapframe copied verbatim from another frame is in most cases useless without some additional normalization.
Note that this change removes the assignment to td->td_frame in some implementations of cpu_set_upcall(). The assignment is redundant. A previous call to cpu_thread_setup() already did the exact same assignment. An added benefit of removing the redundant assignment is that we can now change td_pcb without nasty side-effects.
This change officially marks the ability on ia64 for 1:1 threading.
Not tested on: amd64, powerpc Compile & boot tested on: alpha, sparc64 Functionally tested on: i386, ia64
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#
111028 |
|
17-Feb-2003 |
jeff |
- Split the struct kse into struct upcall and struct kse. struct kse will soon be visible only to schedulers. This greatly simplifies much the KSE code.
Submitted by: davidxu
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#
110190 |
|
01-Feb-2003 |
julian |
Reversion of commit by Davidxu plus fixes since applied.
I'm not convinced there is anything major wrong with the patch but them's the rules..
I am using my "David's mentor" hat to revert this as he's offline for a while.
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#
109877 |
|
26-Jan-2003 |
davidxu |
Move UPCALL related data structure out of kse, introduce a new data structure called kse_upcall to manage UPCALL. All KSE binding and loaning code are gone.
A thread owns an upcall can collect all completed syscall contexts in its ksegrp, turn itself into UPCALL mode, and takes those contexts back to userland. Any thread without upcall structure has to export their contexts and exit at user boundary.
Any thread running in user mode owns an upcall structure, when it enters kernel, if the kse mailbox's current thread pointer is not NULL, then when the thread is blocked in kernel, a new UPCALL thread is created and the upcall structure is transfered to the new UPCALL thread. if the kse mailbox's current thread pointer is NULL, then when a thread is blocked in kernel, no UPCALL thread will be created.
Each upcall always has an owner thread. Userland can remove an upcall by calling kse_exit, when all upcalls in ksegrp are removed, the group is atomatically shutdown. An upcall owner thread also exits when process is in exiting state. when an owner thread exits, the upcall it owns is also removed.
KSE is a pure scheduler entity. it represents a virtual cpu. when a thread is running, it always has a KSE associated with it. scheduler is free to assign a KSE to thread according thread priority, if thread priority is changed, KSE can be moved from one thread to another.
When a ksegrp is created, there is always N KSEs created in the group. the N is the number of physical cpu in the current system. This makes it is possible that even an userland UTS is single CPU safe, threads in kernel still can execute on different cpu in parallel. Userland calls kse_create to add more upcall structures into ksegrp to increase concurrent in userland itself, kernel is not restricted by number of upcalls userland provides.
The code hasn't been tested under SMP by author due to lack of hardware.
Reviewed by: julian
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#
109342 |
|
15-Jan-2003 |
dillon |
Merge all the various copies of vm_fault_quick() into a single portable copy.
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#
109340 |
|
15-Jan-2003 |
dillon |
Merge all the various copies of vmapbuf() and vunmapbuf() into a single portable copy. Note that pmap_extract() must be used instead of pmap_kextract().
This is precursor work to a reorganization of vmapbuf() to close remaining user/kernel races (which can lead to a panic).
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#
108945 |
|
08-Jan-2003 |
grehan |
Add page queues locking to vunmapbuf().
Obtained from: sparc64 Approved by: benno
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#
107719 |
|
10-Dec-2002 |
julian |
Unbreak the KSE code. Keep track of zobie threads using the Per-CPU storage during the context switch. Rearrange thread cleanups to avoid problems with Giant. Clean threads when freed or when recycled.
Approved by: re (jhb)
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#
107180 |
|
22-Nov-2002 |
mux |
Under certain circumstances, we were calling kmem_free() from i386 cpu_thread_exit(). This resulted in a panic with WITNESS since we need to hold Giant to call kmem_free(), and we weren't helding it anymore in cpu_thread_exit(). We now do this from a new MD function, cpu_thread_dtor(), called by thread_dtor().
Approved by: re@ Suggested by: jhb
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#
105611 |
|
21-Oct-2002 |
grehan |
Add the USER_SR segment register to pcb state. Initialize correctly, and save/restore during a context switch.
The USER_SR could be overwritten when the current thread was switched out with a faulting copyin/copyout.
Approved by: Benno
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#
103609 |
|
19-Sep-2002 |
grehan |
- bring vm_mapbuf/unmapbuf in line with other archs - update for recent KSE changes
Approved by: benno
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#
103049 |
|
06-Sep-2002 |
peter |
Zap the implementations of the i386-aout specific cpu_coredump function. Most of the non-i386 platforms had rather broken implementations anyway.
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#
101941 |
|
15-Aug-2002 |
rwatson |
In order to better support flexible and extensible access control, make a series of modifications to the credential arguments relating to file read and write operations to cliarfy which credential is used for what:
- Change fo_read() and fo_write() to accept "active_cred" instead of "cred", and change the semantics of consumers of fo_read() and fo_write() to pass the active credential of the thread requesting an operation rather than the cached file cred. The cached file cred is still available in fo_read() and fo_write() consumers via fp->f_cred. These changes largely in sys_generic.c.
For each implementation of fo_read() and fo_write(), update cred usage to reflect this change and maintain current semantics:
- badfo_readwrite() unchanged - kqueue_read/write() unchanged pipe_read/write() now authorize MAC using active_cred rather than td->td_ucred - soo_read/write() unchanged - vn_read/write() now authorize MAC using active_cred but VOP_READ/WRITE() with fp->f_cred
Modify vn_rdwr() to accept two credential arguments instead of a single credential: active_cred and file_cred. Use active_cred for MAC authorization, and select a credential for use in VOP_READ/WRITE() based on whether file_cred is NULL or not. If file_cred is provided, authorize the VOP using that cred, otherwise the active credential, matching current semantics.
Modify current vn_rdwr() consumers to pass a file_cred if used in the context of a struct file, and to always pass active_cred. When vn_rdwr() is used without a file_cred, pass NOCRED.
These changes should maintain current semantics for read/write, but avoid a redundant passing of fp->f_cred, as well as making it more clear what the origin of each credential is in file descriptor read/write operations.
Follow-up commits will make similar changes to other file descriptor operations, and modify the MAC framework to pass both credentials to MAC policy modules so they can implement either semantic for revocation.
Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
|
#
99659 |
|
09-Jul-2002 |
benno |
Changes for KSE3.
Submitted by: Peter Grehan <peterg@ptree32.com.au>
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#
98765 |
|
24-Jun-2002 |
jake |
Add an MD callout like cpu_exit, but which is called after sched_lock is obtained, when all other scheduling activity is suspended. This is needed on sparc64 to deactivate the vmspace of the exiting process on all cpus. Otherwise if another unrelated process gets the exact same vmspace structure allocated to it (same address), its address space will not be activated properly. This seems to fix some spontaneous signal 11 problems with smp on sparc64.
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#
97397 |
|
28-May-2002 |
benno |
- Move macros that represent where syscall args are kept in a trapframe from trap.c to frame.h - Use the macros in vm_machdep.c:cpu_fork() to set up the trap frame of the new thread.
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#
93452 |
|
30-Mar-2002 |
alc |
Use the MI vm_map_growstack() instead of the MD grow_stack() in trap(). Remove the MD grow_stack().
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#
92842 |
|
20-Mar-2002 |
alfred |
Remove __P.
Reveiwed by: benno
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#
91477 |
|
28-Feb-2002 |
benno |
GC an unused variable in cpu_fork().
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#
91467 |
|
28-Feb-2002 |
benno |
Make fork work, at least for kthreads. Switching still has some issues.
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#
90643 |
|
13-Feb-2002 |
benno |
Complete rework of the PowerPC pmap and a number of other bits in the early boot sequence.
The new pmap.c is based on NetBSD's newer pmap.c (for the mpc6xx processors) which is 70% faster than the older code that the original pmap.c was based on. It has also been based on the framework established by jake's initial sparc64 pmap.c.
There is no change to how far the kernel gets (it makes it to the mountroot prompt in psim) but the new pmap code is a lot cleaner.
Obtained from: NetBSD (pmap code)
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#
90361 |
|
07-Feb-2002 |
julian |
Pre-KSE/M3 commit. this is a low-functionality change that changes the kernel to access the main thread of a process via the linked list of threads rather than assuming that it is embedded in the process. It IS still embeded there but remove all teh code that assumes that in preparation for the next commit which will actually move it out.
Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
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#
85201 |
|
19-Oct-2001 |
mp |
Fix includes based on recent changes to lock.h, mutex.h and ktr.h.
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#
84977 |
|
15-Oct-2001 |
benno |
Flesh out cpu_fork() and cpu_set_fork_handler(). This is a work in progress.
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#
84381 |
|
02-Oct-2001 |
mjacob |
Fix problem where a user buffer outside of the area being tested will be corrupted.
PR: 29194 Obtained from: Tor.Egge@fast.no MFC after: 2 weeks
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#
83682 |
|
19-Sep-2001 |
mp |
Update PowerPC MD code to compile and do initial bootstrap based on recent changes (KSE and VM requiring physmem to be setup).
Reviewed by: benno, jhb, julian
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#
83276 |
|
10-Sep-2001 |
peter |
Rip some well duplicated code out of cpu_wait() and cpu_exit() and move it to the MI area. KSE touched cpu_wait() which had the same change replicated five ways for each platform. Now it can just do it once. The only MD parts seemed to be dealing with fpu state cleanup and things like vm86 cleanup on x86. The rest was identical.
XXX: ia64 and powerpc did not have cpu_throw(), so I've put a functional stub in place.
Reviewed by: jake, tmm, dillon
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#
83223 |
|
08-Sep-2001 |
peter |
Missing part of dillon's coredump commit. cpu_coredump() was still passing IO_NODELOCKED to vn_rdwr(), this would cause operations on the unlocked core vnode and softupdates nastiness if an a.out binary cored.
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#
82938 |
|
04-Sep-2001 |
peter |
Nuke #if 0'ed "setredzone()" stub. We never used it, and probably never will. I've implemented an optional redzone as part of the KSE upage breakup.
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#
82708 |
|
31-Aug-2001 |
jhb |
Axe stale mp_fixme().
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#
79265 |
|
04-Jul-2001 |
dillon |
Move vm_page_zero_idle() from machine-dependant sections to a machine-independant source file, vm/vm_zeroidle.c. It was exactly the same for all platforms and updating them all was getting annoying.
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#
79263 |
|
04-Jul-2001 |
dillon |
Reorg vm_page.c into vm_page.c, vm_pageq.c, and vm_contig.c (for contigmalloc). Also removed some spl's and added some VM mutexes, but they are not actually used yet, so this commit does not really make any operational changes to the system.
vm_page.c relates to vm_page_t manipulation, including high level deactivation, activation, etc... vm_pageq.c relates to finding free pages and aquiring exclusive access to a page queue (exclusivity part not yet implemented). And the world still builds... :-)
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#
79224 |
|
04-Jul-2001 |
dillon |
With Alfred's permission, remove vm_mtx in favor of a fine-grained approach (this commit is just the first stage). Also add various GIANT_ macros to formalize the removal of Giant, making it easy to test in a more piecemeal fashion. These macros will allow us to test fine-grained locks to a degree before removing Giant, and also after, and to remove Giant in a piecemeal fashion via sysctl's on those subsystems which the authors believe can operate without Giant.
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#
79123 |
|
03-Jul-2001 |
jhb |
Allow Giant to be recursed when a process terminates.
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#
78342 |
|
16-Jun-2001 |
benno |
This commit (along with one pending in sys/dev/ofw and one in sys/conf) give us our first minimal glimpse of PowerPC support.
With this code we can get to the "mountroot>" prompt on my Apple iMac. We can't get any further due to lack of clock and interrupt handling, among other things. This does however mean that pmap and VM are initialising.
We're fairly dependant on OpenFirmware at this point, but I hope to add support for other classes of firmware at a later stage.
Reviewed by: obrien, dfr
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#
78307 |
|
15-Jun-2001 |
obrien |
These were repo copied from their /sys/alpha/alpha counter parts.
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#
77442 |
|
29-May-2001 |
jhb |
GC #if 0'd calls to releasing and acquiring the old style giant kernel lock.
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#
76932 |
|
21-May-2001 |
gallatin |
catch these files up to their i386 neighbors to make alpha boot prior to the vm_mtx
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#
76056 |
|
26-Apr-2001 |
jhb |
Initialize p_md.md_kernnest to 1 for newly fork'd processes since they start off in the kernel.
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#
74271 |
|
15-Mar-2001 |
gallatin |
remove bogus check -- for kernel threads we fork off of proc0, not curproc This was causing panics when modules which create kthreads were loaded after boot.
pointed out by: jake, jhb
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#
73922 |
|
07-Mar-2001 |
jhb |
Use the proc lock to protect p_pptr when waking up our parent in cpu_exit() and remove the mpfixme() message that is now fixed.
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#
72906 |
|
22-Feb-2001 |
jhb |
Rename switch_trampoline() to fork_trampoline() on the alpha and ia64.
Suggested by: dfr
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#
72746 |
|
20-Feb-2001 |
jhb |
- Don't call clear_resched() in userret(), instead, clear the resched flag in mi_switch() just before calling cpu_switch() so that the first switch after a resched request will satisfy the request. - While I'm at it, move a few things into mi_switch() and out of cpu_switch(), specifically set the p_oncpu and p_lastcpu members of proc in mi_switch(), and handle the sched_lock state change across a context switch in mi_switch(). - Since cpu_switch() no longer handles the sched_lock state change, we have to setup an initial state for sched_lock in fork_exit() before we release it.
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#
72200 |
|
09-Feb-2001 |
bmilekic |
Change and clean the mutex lock interface.
mtx_enter(lock, type) becomes:
mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized)
similarily, for releasing a lock, we now have:
mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument.
The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind.
Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two:
MTX_QUIET and MTX_NOSWITCH
The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers:
mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively.
Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case.
Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled.
Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those.
Finally, caught up to the interface changes in all sys code.
Contributors: jake, jhb, jasone (in no particular order)
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71694 |
|
26-Jan-2001 |
jhb |
Update some comments, s0 in the pcb of a child returning from fork1() is now passed in as a0 to fork_exit() and and s2 is passed in as a1.
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#
71604 |
|
24-Jan-2001 |
jhb |
- Change fork_exit() to take a pointer to a trapframe as its 3rd argument instead of a trapframe directly. (Requested by bde.) - Convert the alpha switch_trampoline to call fork_exit() and use the MI fork_return() instead of child_return(). - Axe child_return().
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#
70317 |
|
23-Dec-2000 |
jake |
Protect proc.p_pptr and proc.p_children/p_sibling with the proctree_lock.
linprocfs not locked pending response from informal maintainer.
Reviewed by: jhb, -smp@
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#
69488 |
|
01-Dec-2000 |
gallatin |
acquire/release Giant in vm_page_zero_idle(), like on i386
Discused with: jhb
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#
68900 |
|
19-Nov-2000 |
dfr |
Convert various calls to splhigh() to disable_intr() since splhigh() is now a no-op.
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#
68762 |
|
15-Nov-2000 |
jhb |
Don't perform an mi_switch() when we release Giant during cpu_exit(). We are about to call cpu_switch() anyways.
Found by: witness
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#
67551 |
|
25-Oct-2000 |
jhb |
- Overhaul the software interrupt code to use interrupt threads for each type of software interrupt. Roughly, what used to be a bit in spending now maps to a swi thread. Each thread can have multiple handlers, just like a hardware interrupt thread. - Instead of using a bitmask of pending interrupts, we schedule the specific software interrupt thread to run, so spending, NSWI, and the shandlers array are no longer needed. We can now have an arbitrary number of software interrupt threads. When you register a software interrupt thread via sinthand_add(), you get back a struct intrhand that you pass to sched_swi() when you wish to schedule your swi thread to run. - Convert the name of 'struct intrec' to 'struct intrhand' as it is a bit more intuitive. Also, prefix all the members of struct intrhand with 'ih_'. - Make swi_net() a MI function since there is now no point in it being MD.
Submitted by: cp
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#
67365 |
|
20-Oct-2000 |
jhb |
Catch up to moving headers: - machine/ipl.h -> sys/ipl.h - machine/mutex.h -> sys/mutex.h
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#
66573 |
|
03-Oct-2000 |
dfr |
Clear pcb_schednest in cpu_fork() for the child process. This is is necessary since the child's call stack only includes one recursive hold of sched_lock.
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#
65557 |
|
06-Sep-2000 |
jasone |
Major update to the way synchronization is done in the kernel. Highlights include:
* Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.)
* Per-CPU idle processes.
* Interrupts are run in their own separate kernel threads and can be preempted (i386 only).
Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
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#
61825 |
|
19-Jun-2000 |
gallatin |
Support bounce buffers for ISA DMA on the alpha. This is required for the irongate chipset (used in the UP1000) which does not support scatter/gather DMA. We'll still use scatter gather if the core logic chipset supports it.
Reviewed by: dfr
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#
61540 |
|
11-Jun-2000 |
alc |
cpu_fork(): Check "flags" before dereferencing "p2". Otherwise, the call "vm_fork(p1, 0, flags);" early in fork1 can cause a kernel panic.
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#
60041 |
|
05-May-2000 |
phk |
Separate the struct bio related stuff out of <sys/buf.h> into <sys/bio.h>.
<sys/bio.h> is now a prerequisite for <sys/buf.h> but it shall not be made a nested include according to bdes teachings on the subject of nested includes.
Diskdrivers and similar stuff below specfs::strategy() should no longer need to include <sys/buf.> unless they need caching of data.
Still a few bogus uses of struct buf to track down.
Repocopy by: peter
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#
58345 |
|
20-Mar-2000 |
phk |
Remove B_READ, B_WRITE and B_FREEBUF and replace them with a new field in struct buf: b_iocmd. The b_iocmd is enforced to have exactly one bit set.
B_WRITE was bogusly defined as zero giving rise to obvious coding mistakes.
Also eliminate the redundant struct buf flag B_CALL, it can just as efficiently be done by comparing b_iodone to NULL.
Should you get a panic or drop into the debugger, complaining about "b_iocmd", don't continue. It is likely to write on your disk where it should have been reading.
This change is a step in the direction towards a stackable BIO capability.
A lot of this patch were machine generated (Thanks to style(9) compliance!)
Vinum users: Greg has not had time to test this yet, be careful.
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#
56096 |
|
16-Jan-2000 |
gallatin |
The kernel side of per-process unaligned access control (printing, fixing & delivering SIGBUS). This will allow a non-superuser to control unaligned access behaviour on a per-process basis once a userland control program (uac) is written.
Reviewed by: obrien Tested by: obrien
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#
54207 |
|
06-Dec-1999 |
peter |
Make this compile again. (missing #include for RFPROC)
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#
54188 |
|
06-Dec-1999 |
luoqi |
User ldt sharing.
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#
53086 |
|
10-Nov-1999 |
dfr |
Re-organise the code which manages the owner of the FP state (fpcurproc). The old code was spread out through the machdep code and was sloppy about enabling and disabling the FEN bit (which controls access to the FP register set). This caused a DIAGNOSTIC warning "DANGER WILL ROBINSON: FEN SET IN cpu_fork!" sometimes when operating under high loads and could conceivably lead to processes getting incorrect FP results.
The new code is much more strict about the FEN bit and makes sure that *only* fpcurproc ever has it enabled. This also allows us to remove a section of code from the exception_return path which might improve performance marginally.
Reviewed by: gallatin
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#
52647 |
|
30-Oct-1999 |
alc |
The core of this patch is to vm/vm_page.h. The effects are two-fold: (1) to eliminate an extra (useless) level of indirection in half of the page queue accesses and (2) to use a single name for each queue throughout, instead of, e.g., "vm_page_queue_active" in some places and "vm_page_queues[PQ_ACTIVE]" in others.
Reviewed by: dillon
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#
52635 |
|
29-Oct-1999 |
phk |
useracc() the prequel:
Merge the contents (less some trivial bordering the silly comments) of <vm/vm_prot.h> and <vm/vm_inherit.h> into <vm/vm.h>. This puts the #defines for the vm_inherit_t and vm_prot_t types next to their typedefs.
This paves the road for the commit to follow shortly: change useracc() to use VM_PROT_{READ|WRITE} rather than B_{READ|WRITE} as argument.
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#
51474 |
|
20-Sep-1999 |
dillon |
Fix bug in pipe code relating to writes of mmap'd but illegal address spaces which cross a segment boundry in the page table. pmap_kextract() is not designed for access to the user space portion of the page table and cannot handle the null-page-directory-entry case.
The fix is to have vm_fault_quick() return a success or failure which is then used to avoid calling pmap_kextract().
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#
50477 |
|
27-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
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#
50458 |
|
27-Aug-1999 |
gallatin |
Fix the child's return path from fork so that fork will return 0 in the child. This corrects a problem where linux/alpha binaries see the child's return value of fork as the parent's pid. This happens because linux/alpha binaries apparently check the return value directly, rather than looking for a non-zero value in a4, as *BSD & OSF/1 do.
Reviewed by:dfr@nlsystems.com
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#
49444 |
|
05-Aug-1999 |
jdp |
Sync with alc's revision 1.125 of i386/i386/vm_machdep.c. This fixes the kernel build breakage.
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#
48974 |
|
22-Jul-1999 |
alc |
Reduce the number of "magic constants" used for page coloring by one: PQ_PRIME2 and PQ_PRIME3 are used to accomplish the same thing at different places in the kernel. Drop PQ_PRIME3.
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#
48391 |
|
01-Jul-1999 |
peter |
Slight reorganization of kernel thread/process creation. Instead of using SYSINIT_KT() etc (which is a static, compile-time procedure), use a NetBSD-style kthread_create() interface. kproc_start is still available as a SYSINIT() hook. This allowed simplification of chunks of the sysinit code in the process. This kthread_create() is our old kproc_start internals, with the SYSINIT_KT fork hooks grafted in and tweaked to work the same as the NetBSD one.
One thing I'd like to do shortly is get rid of nfsiod as a user initiated process. It makes sense for the nfs client code to create them on the fly as needed up to a user settable limit. This means that nfsiod doesn't need to be in /sbin and is always "available". This is a fair bit easier to do outside of the SYSINIT_KT() framework.
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#
47869 |
|
10-Jun-1999 |
dt |
Replace my previous fix of saving the FP state with a much simpler one: when we swap out fpcurproc, save its FP state.
Suggested by: bde
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#
47840 |
|
08-Jun-1999 |
dt |
Keep fpcurproc locked in memory, so that we always can save the FP state correctly.
This should fix the "pmap_changebit didn't" panic that some people see.
Reviewed by: dfr
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#
45958 |
|
23-Apr-1999 |
dt |
Fixed several (not all) warnings.
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#
45889 |
|
20-Apr-1999 |
dt |
Added consts to cpu_set_fork_handler prototype. (Follow i386 version.)
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#
45821 |
|
19-Apr-1999 |
peter |
unifdef -DVM_STACK - it's been on for a while for x86 and was checked and appeared to be working for the Alpha some time ago.
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#
43758 |
|
08-Feb-1999 |
dillon |
Adjust idle zero-page fill hysteresis based on tests. Use 2/3 and 4/5 zero-fill levels.
Adjust comment for ozfod in vmmeter.h - this counter represents non-optimal ( on the fly ) zero fills, not prefills.
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#
43753 |
|
07-Feb-1999 |
dillon |
Add hysteresis to alpha version of vm_page_zero_idle().
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#
43752 |
|
07-Feb-1999 |
dillon |
Rip out PQ_ZERO queue. PQ_ZERO functionality is now combined in with PQ_FREE. There is little operational difference other then the kernel being a few kilobytes smaller and the code being more readable.
* vm_page_select_free() has been *greatly* simplified. * The PQ_ZERO page queue and supporting structures have been removed * vm_page_zero_idle() revamped (see below)
PG_ZERO setting and clearing has been migrated from vm_page_alloc() to vm_page_free[_zero]() and will eventually be guarenteed to remain tracked throughout a page's life ( if it isn't already ).
When a page is freed, PG_ZERO pages are appended to the appropriate tailq in the PQ_FREE queue while non-PG_ZERO pages are prepended. When locating a new free page, PG_ZERO selection operates from within vm_page_list_find() ( get page from end of queue instead of beginning of queue ) and then only occurs in the nominal critical path case. If the nominal case misses, both normal and zero-page allocation devolves into the same _vm_page_list_find() select code without any specific zero-page optimizations.
Additionally, vm_page_zero_idle() has been revamped. Hysteresis has been added and zero-page tracking adjusted to conform with the other changes. Currently hysteresis is set at 1/3 (lo) and 1/2 (hi) the number of free pages. We may wish to increase both parameters as time permits. The hysteresis is designed to avoid silly zeroing in borderline allocation/free situations.
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#
43209 |
|
26-Jan-1999 |
julian |
Mostly remove the VM_STACK OPTION. This changes the definitions of a few items so that structures are the same whether or not the option itself is enabled. This allows people to enable and disable the option without recompilng the world.
As the author says:
|I ran into a problem pulling out the VM_STACK option. I was aware of this |when I first did the work, but then forgot about it. The VM_STACK stuff |has some code changes in the i386 branch. There need to be corresponding |changes in the alpha branch before it can come out completely.
what is done: | |1) Pull the VM_STACK option out of the header files it appears in. This |really shouldn't affect anything that executes with or without the rest |of the VM_STACK patches. The vm_map_entry will then always have one |extra element (avail_ssize). It just won't be used if the VM_STACK |option is not turned on. | |I've also pulled the option out of vm_map.c. This shouldn't harm anything, |since the routines that are enabled as a result are not called unless |the VM_STACK option is enabled elsewhere. | |2) Add what appears to be appropriate code the the alpha branch, still |protected behind the VM_STACK switch. I don't have an alpha machine, |so we would need to get some testers with alpha machines to try it out. | |Once there is some testing, we can consider making the change permanent |for both i386 and alpha. | [..] | |Once the alpha code is adequately tested, we can pull VM_STACK out |everywhere. |
Submitted by: "Richard Seaman, Jr." <dick@tar.com>
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#
42175 |
|
30-Dec-1998 |
dfr |
Various changes to support OSF1 emulation:
* Move the user stack from VM_MAXUSER_ADDRESS to a place below the 32bit boundary (needed to support 32bit OSF programs). This should also save one pagetable per process. * Add cvtqlsv to the set of instructions handled by the floating point software completion code. * Disable all floating point exceptions by default. * A minor change to execve to allow the OSF1 image activator to support dynamic loading.
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#
41868 |
|
16-Dec-1998 |
bde |
Removed bogus casts of USRSTACK and/or the other operand in binary expressions involving USRSTACK.
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#
41499 |
|
04-Dec-1998 |
dfr |
Implement 'software completion' for floating point arithmetic. On the alpha, operations involving non-finite numbers or denormalised numbers or operations which should generate such numbers will cause an arithmetic exception. For programs which follow some strict code generation rules, the kernel trap handler can then 'complete' the operation by emulating the faulting instruction.
To use software completion, a program must be compiled with the arguments '-mtrap-precision=i' and '-mfp-trap-mode=su' or '-mfp-trap-mode=sui'. Programs compiled in this way can use non-finite and denormalised numbers at the expense of slightly less efficient code generation of floating point instructions. Programs not compiled with these options will receive a SIGFPE signal when non-finite or denormalised numbers are used or generated.
Reviewed by: John Polstra <jdp@polstra.com>
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#
40377 |
|
15-Oct-1998 |
dfr |
Change a bogus cast to the correct one.
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#
37597 |
|
12-Jul-1998 |
dfr |
Don't bother calling pmap_emulate_reference() from cpu_fork(). It isn't needed and it panics a DIAGNOSTIC kernel.
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#
36865 |
|
10-Jun-1998 |
dfr |
Add missing copyrights. Thanks to Jason Thorpe for politely noting the mistake...
|