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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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321324 |
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21-Jul-2017 |
kib |
MFC r319871: Make struct syscall_args visible to userspace compilation environment from machine/proc.h, consistently on all architectures.
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302408 |
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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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233291 |
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22-Mar-2012 |
alc |
Handle spurious page faults that may occur in no-fault sections of the kernel.
When access restrictions are added to a page table entry, we flush the corresponding virtual address mapping from the TLB. In contrast, when access restrictions are removed from a page table entry, we do not flush the virtual address mapping from the TLB. This is exactly as recommended in AMD's documentation. In effect, when access restrictions are removed from a page table entry, AMD's MMUs will transparently refresh a stale TLB entry. In short, this saves us from having to perform potentially costly TLB flushes. In contrast, Intel's MMUs are allowed to generate a spurious page fault based upon the stale TLB entry. Usually, such spurious page faults are handled by vm_fault() without incident. However, when we are executing no-fault sections of the kernel, we are not allowed to execute vm_fault(). This change introduces special-case handling for spurious page faults that occur in no-fault sections of the kernel.
In collaboration with: kib Tested by: gibbs (an earlier version)
I would also like to acknowledge Hiroki Sato's assistance in diagnosing this problem.
MFC after: 1 week
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226112 |
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07-Oct-2011 |
kib |
Remove unused define.
MFC after: 1 month
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208453 |
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23-May-2010 |
kib |
Reorganize syscall entry and leave handling.
Extend struct sysvec with three new elements: sv_fetch_syscall_args - the method to fetch syscall arguments from usermode into struct syscall_args. The structure is machine-depended (this might be reconsidered after all architectures are converted). sv_set_syscall_retval - the method to set a return value for usermode from the syscall. It is a generalization of cpu_set_syscall_retval(9) to allow ABIs to override the way to set a return value. sv_syscallnames - the table of syscall names.
Use sv_set_syscall_retval in kern_sigsuspend() instead of hardcoding the call to cpu_set_syscall_retval().
The new functions syscallenter(9) and syscallret(9) are provided that use sv_*syscall* pointers and contain the common repeated code from the syscall() implementations for the architecture-specific syscall trap handlers.
Syscallenter() fetches arguments, calls syscall implementation from ABI sysent table, and set up return frame. The end of syscall bookkeeping is done by syscallret().
Take advantage of single place for MI syscall handling code and implement ptrace_lwpinfo pl_flags PL_FLAG_SCE, PL_FLAG_SCX and PL_FLAG_EXEC. The SCE and SCX flags notify the debugger that the thread is stopped at syscall entry or return point respectively. The EXEC flag augments SCX and notifies debugger that the process address space was changed by one of exec(2)-family syscalls.
The i386, amd64, sparc64, sun4v, powerpc and ia64 syscall()s are changed to use syscallenter()/syscallret(). MIPS and arm are not converted and use the mostly unchanged syscall() implementation.
Reviewed by: jhb, marcel, marius, nwhitehorn, stas Tested by: marcel (ia64), marius (sparc64), nwhitehorn (powerpc), stas (mips) MFC after: 1 month
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207269 |
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27-Apr-2010 |
kib |
Style: use #define<TAB> instead of #define<SPACE>.
Noted by: bde, pluknet gmail com MFC after: 11 days
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207152 |
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24-Apr-2010 |
kib |
Move the constants specifying the size of struct kinfo_proc into machine-specific header files. Add KINFO_PROC32_SIZE for struct kinfo_proc32 for architectures providing COMPAT_FREEBSD32. Add CTASSERT for the size of struct kinfo_proc32.
Submitted by: pluknet Reviewed by: imp, jhb, nwhitehorn MFC after: 2 weeks
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182961 |
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12-Sep-2008 |
kib |
When doing rfork(0), i.e. separating curproc VM from any other user of the same vmspace, decrement the reference count of the shared LDT instead of a newly-made copy. Code factually removed LDT from the process that did rfork(0).
Introduce user_ldt_deref() function that does decrement of refcount for the struct proc_ldt, and call it in the rfork(0) case on the shared LDT.
Reviewed by: jhb MFC after: 1 week
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175846 |
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31-Jan-2008 |
mav |
Move GET_STACK_USAGE from MI header to i386/amd64 MD ones. Somebody who can, please feel free to implement it for other archs or copy this one if it suits.
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169802 |
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20-May-2007 |
jeff |
- Move GDT/LDT locking into a seperate spinlock, removing the global scheduler lock from this responsibility.
Contributed by: Attilio Rao <attilio@FreeBSD.org> Tested by: jeff, kkenn
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144637 |
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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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139790 |
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06-Jan-2005 |
imp |
/* -> /*- for copyright notices, minor format tweaks as necessary
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131225 |
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28-Jun-2004 |
imp |
bde points out that this can't do anything useful. The full patch has other parts that I can't locat at the moment, so back it out until I can.
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131220 |
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28-Jun-2004 |
imp |
When opening /dev/io, preserve iopl properly. Otherwise, if you open /dev/io multiple times, the first close remove the privs.
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128019 |
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07-Apr-2004 |
imp |
Remove advertising clause from University of California Regent's license, per letter dated July 22, 1999 and email from Peter Wemm, Alan Cox and Robert Watson.
Approved by: core, peter, alc, rwatson
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121984 |
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03-Nov-2003 |
jhb |
Add a per-thread variable for saving the state of eflags to support the critical section code.
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105955 |
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25-Oct-2002 |
jhb |
Note that the sched_lock protects md_ldt of struct mdproc.
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104294 |
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01-Oct-2002 |
phk |
It is too much work convincing lint why we would want empty structures, so make the non-empty #ifdef lint.
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99742 |
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10-Jul-2002 |
dillon |
Remove the critmode sysctl - the new method for critical_enter/exit (already the default) is now the only method for i386.
Remove the paraphanalia that supported critmode. Remove td_critnest, clean up the assembly, and clean up (mostly remove) the old junk from cpu_critical_enter() and cpu_critical_exit().
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93264 |
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27-Mar-2002 |
dillon |
Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt disablement assumptions in kern_fork.c by adding another API call, cpu_critical_fork_exit(). Cleanup the td_savecrit field by moving it from MI to MD. Temporarily move cpu_critical*() from <arch>/include/cpufunc.h to <arch>/<arch>/critical.c (stage-2 will clean this up).
Implement interrupt deferral for i386 that allows interrupts to remain enabled inside critical sections. This also fixes an IPI interlock bug, and requires uses of icu_lock to be enclosed in a true interrupt disablement.
This is the stage-1 commit. Stage-2 will occur after stage-1 has stabilized, and will move cpu_critical*() into its own header file(s) + other things. This commit may break non-i386 architectures in trivial ways. This should be temporary.
Reviewed by: core Approved by: core
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92761 |
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20-Mar-2002 |
alfred |
Remove __P.
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87702 |
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11-Dec-2001 |
jhb |
Overhaul the per-CPU support a bit:
- The MI portions of struct globaldata have been consolidated into a MI struct pcpu. The MD per-CPU data are specified via a macro defined in machine/pcpu.h. A macro was chosen over a struct mdpcpu so that the interface would be cleaner (PCPU_GET(my_md_field) vs. PCPU_GET(md.md_my_md_field)). - All references to globaldata are changed to pcpu instead. In a UP kernel, this data was stored as global variables which is where the original name came from. In an SMP world this data is per-CPU and ideally private to each CPU outside of the context of debuggers. This also included combining machine/globaldata.h and machine/globals.h into machine/pcpu.h. - The pointer to the thread using the FPU on i386 was renamed from npxthread to fpcurthread to be identical with other architectures. - Make the show pcpu ddb command MI with a MD callout to display MD fields. - The globaldata_register() function was renamed to pcpu_init() and now init's MI fields of a struct pcpu in addition to registering it with the internal array and list. - A pcpu_destroy() function was added to remove a struct pcpu from the internal array and list.
Tested on: alpha, i386 Reviewed by: peter, jake
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85449 |
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24-Oct-2001 |
jhb |
Split the per-process Local Descriptor Table out of the PCB and into struct mdproc.
Submitted by: Andrew R. Reiter <arr@watson.org> Silence on: -current
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83366 |
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12-Sep-2001 |
julian |
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process.
Sorry john! (your next MFC will be a doosie!)
Reviewed by: peter@freebsd.org, dillon@freebsd.org
X-MFC after: ha ha ha ha
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78962 |
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29-Jun-2001 |
jhb |
Add a new MI pointer to the process' trapframe p_frame instead of using various differently named pointers buried under p_md.
Reviewed by: jake (in principle)
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50477 |
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27-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
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46129 |
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27-Apr-1999 |
luoqi |
Enable vmspace sharing on SMP. Major changes are, - %fs register is added to trapframe and saved/restored upon kernel entry/exit. - Per-cpu pages are no longer mapped at the same virtual address. - Each cpu now has a separate gdt selector table. A new segment selector is added to point to per-cpu pages, per-cpu global variables are now accessed through this new selector (%fs). The selectors in gdt table are rearranged for cache line optimization. - fask_vfork is now on as default for both UP and SMP. - Some aio code cleanup.
Reviewed by: Alan Cox <alc@cs.rice.edu> John Dyson <dyson@iquest.net> Julian Elischer <julian@whistel.com> Bruce Evans <bde@zeta.org.au> David Greenman <dg@root.com>
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25549 |
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07-May-1997 |
peter |
Convert md_regs from an int[] to a struct trapframe *. It simplifies some code.
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22975 |
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22-Feb-1997 |
peter |
Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not ready for it yet.
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21673 |
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14-Jan-1997 |
jkh |
Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
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15174 |
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10-Apr-1996 |
nate |
hp300 -> i386
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1549 |
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25-May-1994 |
rgrimes |
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch.
Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
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719 |
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07-Nov-1993 |
wollman |
Made all header files idempotent and moved incorrect common data from headers into a related source file. Added cons.h as first step towards moving i386/i386/cons.h to machine/cons.h where it belongs.
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621 |
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16-Oct-1993 |
rgrimes |
Removed all patch kit headers, sccsid and rcsid strings, put $Id$ in, some minor cleanup. Added $Id$ to files that did not have any version info, etc
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5 |
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12-Jun-1993 |
rgrimes |
This commit was generated by cvs2svn to compensate for changes in r4, which included commits to RCS files with non-trunk default branches.
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4 |
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12-Jun-1993 |
rgrimes |
Initial import, 0.1 + pk 0.2.4-B1
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