- 06 Sep, 2005 6 commits
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Milton Miller authored
Split scc and 15550 functions from udbg each into their own file. This makes them more symetric with the lpar and btext code. Signed-off-by:
Milton Miller <miltonm@bga.com> Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Milton Miller authored
make udbg_init_uart set the ppc_md udbg methods. Signed-off-by:
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Milton Miller authored
Make the 16550 and real mode 16550 use tail recursion like the scc code instead of repeating the routine except for the character sent. Gcc recoginizes the tail recursion and handles it efficently without stack allocations. The maple real putc shrinks from 188 to 104 bytes of instructions. udbg_putc drops from 188 to 140 bytes. Signed-off-by:
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Milton Miller authored
Now that xmon is fixed we should not need the dummy getc routines. Signed-off-by:
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Milton Miller authored
udbg_getc_poll is a ppc_md function. don't call directly into udbg.c Signed-off-by:
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Milton Miller authored
inline pmac_call_feature references ppc_md so include asm/machdep.h in asm/pmac_feature.h Signed-off-by:
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- 05 Sep, 2005 34 commits
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Linus Torvalds authored
Automated merge from master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog failed due to duplicate different changes to Kconfig file. Manually fixed up. Hopefully.
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Linus Torvalds authored
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Jeff Garzik authored
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Jeff Garzik authored
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Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Martin Schwidefsky authored
Fix reboot with a disconnected 3270 console. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Heiko Carstens authored
On s390 the lock value used for spinlocks consists of the lower 32 bits of the PSW that holds the lock. If this address happens to be on a four gigabyte boundary the lock is left unlocked. This allows other cpus to grab the same lock and enter a lock protected code path concurrently. In theory this can happen if the vmalloc area for the code of a module crosses a 4 GB boundary. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Use TIF bit to tell if a process is running in 31 bit mode instead of checking the addressing mode bits of the PSW. Signed-off-by:
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Eric Rossman authored
crypto device driver update: - Suppress syslog messages for some return codes. - Fix incorrect bounds checking in /proc interface. - Remove hotplug calls. - Remove linux version checks. - Remove device workqueue on module unload. Signed-off-by:
Eric Rossman <edrossma@us.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
There is a race in pfault_interrupt. That function gets called two times for each pfault notification. Once with a subcode of 0 to indicate that a real page is not available and once with a subcode of 0x80 to indicate that the page is present again. Since the two external interrupts can be delivered on two different cpus the order in which the two calls are made is unpredictable. It is possible that the subcode 0x80 interrupt is completed before the subcode 0x00 interrupt has done the wake_up() call. To avoid calling wake_up() on an already removed task structure proper task structure reference counting is needed. Increase the reference counter in the subcode 0x00 interrupt before setting pfault_wait to zero and return the reference after the wake_up call. Signed-off-by:
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Cornelia Huck authored
Common i/o layer changes: - Collect the irb at the correct subchannel when waiting for the clear interrupt during subchannel cleaning befor reIPL - don't stop at the first interrupt that comes in. - Change "extern __inline__" to "static inline". - Remove unneeded qdio includes. Signed-off-by:
Cornelia Huck <cohuck@de.ibm.com> Signed-off-by:
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Horst Hummel authored
Add support for diag 250 access to dasd devices for 64 bit kernels. In addition fix detach/attach for diag disks. The VM control block needs to get recreated by a call to mdsk_init_io. Signed-off-by:
Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by:
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Horst Hummel authored
Reintroduce a read-only copy of the devmap features in the device struct. This is necessary to solve a deadlock on the dasd_devmap_lock which is acquired by dasd_get_features called from the dasd tasklet. The current implementation of devmap doesn't allow to call any devmap function from interrupt or softirq context. Signed-off-by:
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Michael Holzheu authored
debug feature changes/bug fixes: - Use get_clock() function instead of private inline assembly. - Use 'struct timeval' instead of 'struct timespec' for call to tod_to_timeval(). Now the microsecond part of the timestamp is correct again. - Fix a locking problem: when creating a snapshot of the current content of the debug areas, lock the entire debug_info object. Signed-off-by:
Michael Holzheu <holzheu@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
The new machine check handler still has a few bugs. 1) The system entry time has to be stored in the machine check handler, 2) the machine check return psw may not be stored at the usual place because it might overwrite the return psw of the interrupted context, 3) the return address for the call to s390_handle_mcck in the i/o interrupt handler is not correct, 4) the system call cleanup has to take the different save area of the machine check handler into account, 5) the machine check handler may not call UPDATE_VTIME before CREATE_STACK_FRAME, and 6) the io leave path needs a critical section cleanup to make sure that the TIF_MCCK_PENDING bit is really checked before switching back to user space. Signed-off-by:
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Adrian Bunk authored
This file seems to be an accident. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
Chris Zankel <chris@zankel.net> Signed-off-by:
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Adrian Bunk authored
"extern inline" doesn't make sense. Signed-off-by:
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Jeff Dike authored
We were leaking pmd pages when 3_LEVEL_PGTABLES was enabled. This fixes that. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Signed-off-by:
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Bodo Stroesser authored
cleanup and fix the check for advanced sysemu (PTRACE_SYSEMU_SINGLESTEP option) Signed-off-by:
Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by:
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Bodo Stroesser authored
Add new cmdline setups: - noprocmm - noptracefaultinfo In case of testing, they can be used to switch off usage of /proc/mm and PTRACE_FAULTINFO independently. Signed-off-by:
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Bodo Stroesser authored
Change syscall-stub's data to include a "expected retval". Stub now checks syscalls retval and aborts execution of syscall list, if retval != expected retval. run_syscall_stub prints the data of the failed syscall, using the data pointer and retval written by the stub to the beginning of the stack. one_syscall_stub is removed, to simplify code, because only some instructions are saved by one_syscall_stub, no host-syscall. Using the stub with additional data (modify_ldt via stub) is prepared also. Signed-off-by:
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Bodo Stroesser authored
This change enables SKAS0/SKAS3 to work with all combinations of /proc/mm and PTRACE_FAULTINFO being available or not. Also it changes the initialization of proc_mm and ptrace_faultinfo slightly, to ease forcing SKAS0 on a patched host. Forcing UML to run without /proc/mm or PTRACE_FAULTINFO by cmdline parameter can be implemented with a setup resetting the related variable. Signed-off-by:
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Gennady Sharapov authored
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from process.c file under os-Linux dir and join process.c and process_kern.c files. Signed-off-by:
Gennady Sharapov <gennady.v.sharapov@intel.com> Signed-off-by:
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Jeff Dike authored
This adds AIO support to the ubd driver. The driver breaks a struct request into IO requests to the host, based on the hardware segments in the request and on any COW blocks covered by the request. The ubd IO thread is gone, since there is now an equivalent thread in the AIO module. There is provision for multiple outstanding requests now. Requests aren't retired until all pieces of it have been completed. The AIO requests have a shared count, which is decremented as IO operations come in until it reaches 0. This can be possibly moved to the request struct - haven't looked at this yet. Signed-off-by:
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Jeff Dike authored
This patch makes UML use host AIO support when it (and /usr/include/linux/aio_abi.h) are present. This is only the support, with no consumers - a consumer is coming in the next patch. Signed-off-by:
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Al Viro authored
Added missing include list to uml AFLAGS Killed magic for stubs. [So] - it was needed only because of messed AFLAGS Switched segv_stubs.c to kernel CFLAGS sans profile, instead of user ones Killed STUBS_CFLAGS - it's not needed and the only remaining use had been gratitious - it only polluted CFLAGS Signed-off-by:
Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by:
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Jeff Dike authored
This merges two sets of files which had no business being split apart in the first place. Signed-off-by:
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Jeff Dike authored
There is a lot of code which is duplicated between the 2 and 3 level implementation, with the only difference that the 3-level implementation is a bit more generalized (instead of accessing directly pte_t.pte, it uses the appropriate access macros). So this code is joined together. As obvious, a "core code nice cleanup" is not a "stability-friendly patch" so usual care applies. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
This adds VM op batching to skas0. Rather than having a context switch to and from the userspace stub for each address space change, we write a number of operations to the stub data page and invoke a different stub which loops over them and executes them all in one go. The operations are stored as [ system call number, arg1, arg2, ... ] tuples. The set is terminated by a system call number of 0. Single operations, i.e. page faults, are handled in the old way, since that is slightly more efficient. For a kernel build, a minority (~1/4) of the operations are part of a set. These sets averaged ~100 in length, so for this quarter, the context switching overhead is greatly reduced. Signed-off-by:
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Jeff Dike authored
Al Viro <viro@parcelfarce.linux.theplanet.co.uk> spotted a bunch of duplicated exports - this removes them. Signed-off-by:
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