- fix bugs where we would:
- try to map the hypervisors address space
- accidentally kick out an existing kernel mapping for some domain creation memory allocation sizes
- accidentally skip a 2MB kernel mapping for some domain creation memory allocation sizes
- don't rely on trapping in to xen to read rcr2, reference through vcpu
- whitespace cleanups
user-mode pointers. Change types used in the structures definitions to
properly-sized architecture-specific types.
Submitted by: dchagin
MFC after: 1 week
This was located in the ubsa driver, but should be moved into a separate
driver:
- 3G modems provide multiple serial ports to allow AT commands while the PPP
connection is up.
- 3G modems do not provide baud rate or other serial port settings.
- Huawei cards need specific initialisation.
- ubsa is for Belkin adapters, an Linuxy choice for another device like 3G.
Speeds achieved here with a weak signal at best is ~40kb/s (UMTS). No spooky
STALLED messages as well.
Next: Move over all entries for Sierra and Novatel cards once I have found
testers, and implemented serial port enumeration for Sierra (or rather have
Andrea Guzzo do it). They list all endpoints in 1 iface instead of 4 ifaces.
Submitted by: aguzzo@anywi.com
MFC after: 3 weeks
single stepped the process to the system call), we need to clear
the trap flag from the new frame. Otherwise, the new thread will
receive a (likely unexpected) SIGTRAP when it executes the first
instruction after returning to userland.
all to date and the latter also is only used in ia64 and powerpc
code which no longer serves a real purpose after bring-up and just
can be removed as well. Note that architectures like sun4u also
provide no means of implementing IPI'ing a CPU itself natively
in the first place.
Suggested by: jhb
Reviewed by: arch, grehan, jhb
and Xlazypmap differ from the frame for Xtimerint. The Xtimerint puts
pointer to the frame between return address and frame body, while rest
of the functions listed above do not. Correct offset calculation to
allow the ddb backtrace to step over such frames.
Noted and reviewed by: tegge
Tested by: pho
MFC after: 1 week
After I removed all the unit2minor()/minor2unit() calls from the kernel
yesterday, I realised calling minor() everywhere is quite confusing.
Character devices now only have the ability to store a unit number, not
a minor number. Remove the confusion by using dev2unit() everywhere.
This commit could also be considered as a bug fix. A lot of drivers call
minor(), while they should actually be calling dev2unit(). In -CURRENT
this isn't a problem, but it turns out we never had any problem reports
related to that issue in the past. I suspect not many people connect
more than 256 pieces of the same hardware.
Reviewed by: kib
When I changed kern_conf.c three months ago I made device unit numbers
equal to (unneeded) device minor numbers. We used to require
bitshifting, because there were eight bits in the middle that were
reserved for a device major number. Not very long after I turned
dev2unit(), minor(), unit2minor() and minor2unit() into macro's.
The unit2minor() and minor2unit() macro's were no-ops.
We'd better not remove these four macro's from the kernel, because there
is a lot of (external) code that may still depend on them. For now it's
harmless to remove all invocations of unit2minor() and minor2unit().
Reviewed by: kib
to the C99 style. At least, it is easier to read sysent definitions
that way, and search for the actual instances of sigcode etc.
Explicitely initialize sysentvec.sv_maxssiz that was missed in most
sysvecs.
No objection from: jhb
MFC after: 1 month
and bcmp are not the same thing. 'man bcmp' states that the return is
"non-zero" if the two byte strings are not identical. Where as,
'man memcmp' states that the return is the "difference between the
first two differing bytes (treated as unsigned char values" if the
two byte strings are not identical.
So provide a proper memcmp(9), but it is a C implementation not a tuned
assembly implementation. Therefore bcmp(9) should be preferred over memcmp(9).
Reverse the direction of pmap_promote_pde()'s traversal over the specified
page table page. The direction of the traversal can matter if
pmap_promote_pde() has to remove write access (PG_RW) from a PTE that
hasn't been modified (PG_M). In general, if there are two or more such
PTEs to choose among, it is better to write protect the one nearer the
high end of the page table page rather than the low end. This is because
most programs access memory in an ascending direction. The net result of
this change is a sometimes significant reduction in the number of failed
promotion attempts and the number of pages that are write protected by
pmap_promote_pde().
MFamd64 SVN rev 179777 CVS rev 1.621
Tweak the promotion test in pmap_promote_pde(). Specifically, test PG_A
before PG_M. This sometimes prevents unnecessary removal of write access
from a PTE. Overall, the net result is fewer demotions and promotion
failures.
core of this change generalizes the initial page directory setup so that
the kernel can be given arbitrarily large or small.
- small formatting fixes
- update copyright
MFC after: 1 month
so the benefit of having acpi.ko as a standalone module is outweighed by
the complications of drivers compiled into the kernel not including ACPI
attachments by default.
Discussed on: current
On the i386 architecture, the processor only saves the current value
of `%esp' on stack if a privilege switch is necessary when entering
the interrupt handler. Thus, `frame->tf_esp' is only valid for
an entry from user mode. For interrupts taken in kernel mode, we
need to determine the top-of-stack for the interrupted kernel
procedure by adding the appropriate offset to the current frame
pointer.
Reported by: kris, Fabien Thomas
Tested by: Fabien Thomas <fabien.thomas at netasq dot com>
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
The user_ldt_free() function shall return with dt_lock unlocked.
Error handling code in both functions do not handle this, fix it by
doing necessary lock/unlock.
While there, fix minor style nits.
MFC after: 1 week
code. We only attempt a single reset using this method (a "hard" reset),
and we use two writes to ensure there is a 0 -> 1 transition in bit 2 to
force a reset.
MFC after: 1 week
memory-mapped config access. Add a workaround for these systems by
checking the first function of each slot on bus 0 using both the
memory-mapped config access and the older type 1 I/O port config access.
If we find a slot that is only visible via the type 1 I/O port config
access, we flag that slot. Future PCI config transactions to flagged
slots on bus 0 use type 1 I/O port config access rather than memory mapped
config access.
l_ucontext. To restore the registers content, trampoline needs to
dereference uc_mcontext instead of taking some undefined values from
l_ucontext.
Submitted by: Dmitry Chagin <dchagin@>
MFC after: 1 week
at least pass muster with the loader on 3.0.3
Note that this doesn't actually make it work as Xen 3.0.3
appears to disallow recursive mappings on the page directory
