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* [PATCH] uml: capture printk output for mconsole sysrqJeff Dike2006-01-061-18/+30
| | | | | | | | | | Pass sysrq output back to the mconsole client using the mechanism introduced for stack output. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: capture printk output for mconsole stackJeff Dike2006-01-061-6/+81
| | | | | | | | | | | | | | | The stack command now sends the printk output back to the mconsole client. This is done by registering a special console for the mconsole driver. This receives all printk output. Normally, it is ignored, but when a stack command is issued, any printk output will be sent back to the client. This will capture any printk output, whether it is stack output or not, since we can't tell the difference. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: add mconsole_reply variant with length paramJeff Dike2006-01-062-6/+14
| | | | | | | | | | | | | | This is needed for the console output patch, since we have a possibly non-NULL-terminated string there. So, the new interface takes a string and a length, and the old interface calls strlen on its string and calls the new interface with the length. There's also a bit of whitespace cleanup. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: better diagnostics for broken configsJeff Dike2006-01-061-0/+3
| | | | | | | | | Produce a compile-time error if both MODE_SKAS and MODE_TT are disabled. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: SIGWINCH handling cleanupJeff Dike2006-01-061-30/+24
| | | | | | | | | | Code cleanup - unregister_winch and winch_cleanup had some duplicate code. This is now abstracted out into free_winch. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: umid cleanupJeff Dike2006-01-066-126/+164
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch cleans up the umid code: - The only_if_set argument to get_umid is gone. - get_umid returns an empty string rather than NULL if there is no umid. - umid_is_random is gone since its users went away. - Some printfs were turned into printks because the code runs late enough that printk is working. - Error paths were cleaned up. - Some functions now return an error and let the caller print the error message rather than printing it themselves. This eliminates the practice of passing a pointer to printf or printk in, depending on where in the boot process we are. - Major tidying of not_dead_yet - mostly error path cleanup, plus a comment explaining why it doesn't react to errors the way you might expect. - Calls to os_* interfaces that were moved under os are changed back to their native libc forms. - snprintf, strlcpy, and their bounds-checking friends are used more often, replacing by-hand bounds checking in some places. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: separate libc-dependent umid codeJeff Dike2006-01-067-339/+324
| | | | | | | | | | | | | | | | I reworked Gennady's umid OS abstraction patch because the code shouldn't be moved entirely to os. As it turns out, I moved most of it anyway. This patch is the minimal one needed to move the code and have it work. It turns out that the concept of the umid is OS-independent, but almost everything else about the implementation is OS-dependent. This is code movement without cleanup - a follow-on patch tidies everything up without shuffling code around. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: Add throttling to console driverJeff Dike2006-01-066-14/+63
| | | | | | | | | | This patch adds support for throttling and unthrottling input when the tty driver can't handle it. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: Fix flip_buf full handlingJeff Dike2006-01-061-1/+1
| | | | | | | | | | When the tty flip_buf is full, it's a good idea to delay the input processing for a jiffy, rather than just scheduling the tasklet immediately. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: Simplify console opening/closing and irq registrationJeff Dike2006-01-066-166/+137
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch simplifies the opening and closing of host console devices and the registration and deregistration of IRQs. The intent is to make it obvious that an IRQ can't exist without an open file descriptor. chan_enable will now open the channel, and when both opening and IRQ registration are desired, this should be used. Opening only is done for the initial console, so that interface still needs to exist. The free_irqs_later interface is now gone. It was intended to avoid freeing an IRQ while it was being processed. It did this, but it didn't eliminate the possiblity of free_irq being called from an interrupt, which is bad. In its place is a list of irqs to be freed, which is processed by the signal handler just before exiting. close_one_chan now disables irqs. When a host device disappears, it is just closed, and that disables IRQs. The device id registered with the IRQ is now the chan structure, not the tty. This is because the interrupt arrives on a descriptor associated with the channel. This caused equivalent changes in the arguments to line_timer_cb. line_disable is gone since it is not used any more. The count field in the line structure is gone. tty->count is used instead. The complicated logic in sigio_handler with freeing IRQs when necessary and making sure its idea of the next irq is correct is now much simpler. The irq list can't be rearranged underneath it, so it is now a simple list walk. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move console configurationJeff Dike2006-01-065-32/+35
| | | | | | | | | | | | | | | | | This patch changes when console devices are configured in order to prepare the ground for the next patch. parse_chan_pair is now done earlier, when initcalls are run, rather than when the device is opened. When a host device disappears, the channel list is closed, but not freed. This is required by the previous change. line_config now takes the options structure as an argument, and line_open doesn't. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: line_setup interface changeJeff Dike2006-01-061-3/+9
| | | | | | | | | | line_setup is changed to return the device which it set up, rather than just success or failure. This will be important in the line-config patch. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: Add static initializations and declarationsJeff Dike2006-01-064-10/+9
| | | | | | | | | | | Some structure fields were being dynamically initialized when they could be initialized at compile-time instead. This also makes some declarations static (in the C sense). Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: Move mconsole support out of generic codeJeff Dike2006-01-064-15/+14
| | | | | | | | | | | A bit of restructuring which eliminates the all_allowed argument (which is mconsole-specific) to line_setup. That logic is moved to the mconsole callback. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: Remove unneeded structure fieldJeff Dike2006-01-063-14/+9
| | | | | | | | | | This removes a structure field which turned out to be pointless, and references to it. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: use ARRAY_SIZEJeff Dike2006-01-062-20/+13
| | | | | | | | | | This patch replaces instances of "sizeof(foo)/sizeof(foo[0])" with ARRAY_SIZE(foo), which expands to the same thing. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: Formatting changesJeff Dike2006-01-068-368/+381
| | | | | | | | | | | | | | | | | | | This patch makes a bunch of non-functional changes - return(foo); becomes return foo; some statements are broken across lines for readability some trailing whitespace is cleaned up open_one_chan took four arguments, three of which could be deduced from the first. Accordingly, they were eliminated. some examples of "} else {" had a newline added some whitespace cleanup in the indentation lines_init got some control flow cleanup some long lines were broken removed another emacs-specific C formatting comment Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: non-void functions should return somethingJeff Dike2006-01-063-11/+6
| | | | | | | | | | | There are a few functions which are declared to return something, but don't. These are actually infinite loops which are forced to be declared as non-void. This makes them all return 0. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: use kstrdupJeff Dike2006-01-064-8/+8
| | | | | | | | | | | | There were a bunch of calls to uml_strdup dating from before kstrdup was introduced. This changes those calls. It doesn't eliminate the definition since there is still a couple of calls in userspace code (which should probably call the libc strdup). Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cris: kgdb: remove double_this()Alexey Dobriyan2006-01-061-6/+0
| | | | | | | | | | Doesn't make much sense and unused. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Mikael Starvik <starvik@axis.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] m68knommu: enable_irq/disable_irqChristoph Hellwig2006-01-062-4/+0
| | | | | | | | | | mach_enable_irq/mach_disable_irq are never actually set, so let's remove them. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] m32r: Remove unnecessary icu_data_t definitionsHirokazu Takata2006-01-068-52/+0
| | | | | | | | | | This patch removes unnecessary struct icu_data_t definitions of arch/m32r/kernel/setup_*.c. Signed-off-by: Hayato Fujiwara <fujiwara@linux-m32r.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] m32r: Fix M32104 cache flushing routinesHirokazu Takata2006-01-062-10/+33
| | | | | | | | | | | | | | | | This patch fixes cache memory parameter setting for the M32104 target. So far, its performance seemed to have been degraded due to incorrect cache parameter setting. * arch/m32r/boot/setup.S: Set SFR(Special Fuction Registers) region to be non-cachable explicitly. * arch/m32r/mm/cache.c: Fix cache flushing routines not to switch off the M32104 cache. Signed-off-by: Hayato Fujiwara <fujiwara@linux-m32r.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] m32r: Update _port2addr to use NONCACHE_OFFSETHirokazu Takata2006-01-067-62/+71
| | | | | | | | | | | | Modify _port2addr*() routines in arch/m32r/kernel/io_*.c to use NONCACHE_OFFSET instead of hard-coding of a constant address. This modification is also required to support an M3A-ZA36 FPGA eva board in case an MMU-less synthesizable m32r core is used. Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] m32r: Support M32104UT target platformHirokazu Takata2006-01-0611-11/+1185
| | | | | | | | | | | | | | | | | This patch is for supporting a new target platform, Renesas M32104UT evaluation board. The M32104UT is an eval board based on an uT-Engine specification. This board has an MMU-less M32R family processor, M32104. http://www-wa0.personal-media.co.jp/pmc/archive/te/te_m32104_e.pdf This board is one of the most popular M32R platform, so we have ported Linux/M32R to it. Signed-off-by: Naoto Sugai <Sugai.Naoto@ak.MitsubishiElectric.co.jp> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] m32r: trivial fix to remove unused instructionsHirokazu Takata2006-01-061-2/+0
| | | | | | | | | A trivial fix to remove unused instructions. Signed-off-by: Naoto Sugai <Sugai.Naoto@ak.MitsubishiElectric.co.jp> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Alpha: convert to generic irq framework (alpha part)Ivan Kokshaysky2006-01-063-622/+22
| | | | | | | | | | Kconfig tweaks and tons of deletions. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Christoph Hellwig <hch@lst.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cpu hotplug/x86_64: disable interrupt in play_deadShaohua Li2006-01-061-2/+3
| | | | | | | | | | | With physical CPU hotplug, the CPU is hot removed and it should not receive any interrupts. Disabling interrupt is much safer. This basically is what we do in ia64 & x86. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: Handle HP laptop rebooting properly.Ben Collins2006-01-061-3/+3
| | | | | | Signed-off-by: Ben Collins <bcollins@ubuntu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: ioapic virtual wire mode fixVivek Goyal2006-01-061-2/+2
| | | | | | | | | | | | | | | | | | | | | o Currently, during kexec reboot, IOAPIC is re-programmed back to virtual wire mode if there was an i8259 connected to it. This enables getting timer interrupts in second kernel in legacy mode. o After putting into virtual wire mode, IOAPIC delivers the i8259 interrupts to CPU0. This works well for kexec but not for kdump as we might crash on a different CPU and second kernel will not see timer interrupts. o This patch modifies the redirection table entry to deliver the timer interrupts to the cpu we are rebooting (instead of hardcoding to zero). This ensures that second kernel receives timer interrupts even on a non-boot cpu. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@muc.de> Cc: "Seth, Rohit" <rohit.seth@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fix cpu frequency detection in ↵Larry Finger2006-01-061-0/+2
| | | | | | | | | | | | | | | | | arch/i386/kernel/timers/timer_tsc.c::recalibrate_cpu_khz() When we re-calibrate the frequency, it is likely that an interrupt (as for example the main system clock) will be triggered by the system. Therefore the calibration may not be accurate. This will also provide a fix to bug #5266. Many thanks to Larry Finger for helping resolving this issue. Signed-off-by: Bruno Ducrot <ducrot@poupinou.org> Cc: john stultz <johnstul@us.ibm.com> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] APM Screen Blanking fixJordan Crouse2006-01-061-13/+14
| | | | | | | | | | | | | | | | | - Fix screen blanking on BIOSes that return APM_NOT_ENGAGED when APM enabled screen blanking is not turned on. The original code only tried to set the state on device 0x100, and then 0x1FF, and I added 0x101 to the mix too. - Clean up logic in apm_console_blank(). - Prevent the error message from printing out twice. Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Base support for AMD Geode GX/LX processorsJordan Crouse2006-01-063-6/+42
| | | | | | | | | Provide basic support for the AMD Geode GX and LX processors. Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] arch/i386/kernel/cpuid.c: unused variableDaniel Marjamaki2006-01-061-2/+1
| | | | | | | | | Removed the unused variable "rv". Signed-off-by: Daniel Marjamaki <daniel.marjamaki@comhem.se> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] arch/i386/kernel/msr.c: removed unused variableDaniel Marjamaki2006-01-061-2/+1
| | | | | | | | | Removed the unused variable "rv". Signed-off-by: Daniel Marjamaki <daniel.marjamaki@comhem.se> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: missing printk newline in apic boot option parserDave Jones2006-01-061-1/+1
| | | | | | | | Missing newline in printk. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: change_page_attr() fixDave Jones2006-01-061-6/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'make rodata read-only' patch in -mm exposes a latent bug in the 32-bit change_page_attr() function, which causes certain CPUs (Those with NX basically) to reboot instantly after pages are marked read-only. The same bug got fixed a while back on x86-64, but never got propagated to i386. Stuart Hayes from Dell also picked up on this last June, but it never got fixed, as the only thing affected by it aparently was the nvidia driver. Blatantly stealing description from his post.. "It doesn't appear to be fixed (in the i386 arch). The change_page_attr()/split_large_page() code will still still set all the 4K PTEs to PAGE_KERNEL (setting the _PAGE_NX bit) when a large page needs to be split. This wouldn't be a problem for the bulk of the kernel memory, but there are pages in the lower 4MB of memory that's free, and are part of large executable pages that also contain kernel code. If change_page_attr() is called on these, it will set the _PAGE_NX bit on the whole 2MB region that was covered by the large page, causing a large chunk of kernel code to be non-executable." Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Dave Jones <davej@redhat.com> Cc: <Stuart_Hayes@Dell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] make bigsmp the default mode if CONFIG_HOTPLUG_CPUAshok Raj2006-01-061-8/+18
| | | | | | | | | | If we are using hotplug enabled kernel, then make bigsmp the default mode. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386 sparsemem for single node systemsAndy Whitcroft2006-01-062-2/+14
| | | | | | | | | | | | | | Allow SPARSEMEM to be enabled on non-numa x86 systems. This is made dependant on EXPERIMENTAL also being set. When an in-tree user (such as simulated numa) exists it should be made dependant on that. The plan is to have no options and no selector as normal when !EXPERIMENTAL. When EXPERIMENTAL we enable the FLATMEM and SPARSEMEM options for X86_PC whilst maintaining DISCONTIGMEM and SPARSEMEM for NUMA. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86/x86_64: mark rodata section read-only: make some datastructures ↵Arjan van de Ven2006-01-064-3/+3
| | | | | | | | | | | | | | | | | const Mark some key kernel datastructures readonly. This patch was previously posted on Jun 28th but was back then not merged because nothing was enforcing rodata anyway.. well that changed now :) Patch by Christoph Lameter <christoph@lameter.com> and Dave Jones <davej@redhat.com> Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86/x86_64: mark rodata section read-only: x86-64 supportArjan van de Ven2006-01-062-0/+33
| | | | | | | | | | x86-64 specific parts to make the .rodata section read only Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86/x86_64: mark rodata section read only: generic x86-64 bugfixArjan van de Ven2006-01-061-2/+7
| | | | | | | | | | | | | | | | | Bug fix required for the .rodata work on x86-64: when change_page_attr() and friends need to break up a 2Mb page into 4Kb pages, it always set the NX bit on the PMD, which causes the cpu to consider the entire 2Mb region to be NX regardless of the actual PTE perms. This is fine in general, with one big exception: the 2Mb page that covers the last part of the kernel .text! The fix is to not invent a new permission for the new PMD entry, but to just inherit the existing one minus the PSE bit. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86/x86_64: mark rodata section read only: x86 partsArjan van de Ven2006-01-062-0/+34
| | | | | | | | | | | x86 specific parts to make the .rodata section read only Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: Deprecate useless bugZachary Amsden2006-01-061-11/+1
| | | | | | | | | | | | Remove the "temporary debugging check" which has managed to live for quite some time, and is clearly unneeded. The mm can never be live at this point, so clearly checking the LDT in the mm->context is redundant as well. Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: Apm is on cpu zero onlyZachary Amsden2006-01-061-12/+11
| | | | | | | | | | | APM BIOS code has a protective wrapper that runs it only on CPU zero. Thus, no need to set APM BIOS segments in the GDT for other CPUs. Signed-off-by: Zachary Amsden <zach@vmware.com> Acked-by: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: Stop deleting ntZachary Amsden2006-01-061-5/+0
| | | | | | | | | | | Stop deleting NT bit from EFLAGS. See arch/i386/kernel/head.S line 223, which does something even better. Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: Fixed pnp bios limitsZachary Amsden2006-01-061-4/+8
| | | | | | | | | | | | | | | | PnP BIOS data, code, and 32-bit entry segments all have fixed limits as well; set them in the GDT rather than adding more code. It would be nice to add these fixups to the boot GDT rather than setting the GDT for each CPU; perhaps I can wiggle this in later, but getting it in before the subsys init looks tricky. Also, make some progress on deprecating the ugly Q_SET_SEL macros. Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: Pnp byte granularityZachary Amsden2006-01-061-6/+6
| | | | | | | | | | | | | | | | | | | | | | | The one remaining caller of set_limit, the PnP BIOS code, calls into the PnP BIOS, passing kernel parameters in and out. These parameteres may be passed from arbitrary kernel virtual memory, so they deserve strict protection to stop a bad BIOS from smashing beyond the object size. Unfortunately, the use of set_limit was badly botching this by setting the limit in terms of pages, when it really should have byte granularity. When doing this, I discovered my BIOS had the buggy code during the "get system device node" call: mov ax, es:[bx] Which is harmless, but has a trivial workaround. Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: Apm seg in gdtZachary Amsden2006-01-062-10/+5
| | | | | | | | | | | Since APM BIOS segment limits are now fixed, set them in head.S GDT and don't use the complicated _set_limit() macro expansion. Signed-off-by: Zachary Amsden <zach@vmware.com> Acked-by: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: Always relax segmentsZachary Amsden2006-01-061-38/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | APM BIOSes have many bugs regarding proper representation of the appropriate segment limits for calling the BIOS. By default, APM_RELAX_SEGMENTS is always turned on to support running the APM BIOS on these buggy machines. Keeping 64k limits poses very little danger to the kernel, because the pages where the APM BIOS is located will always be in low physical memory BIOS areas, which should already be marked reserved, and only buggy BIOSes would possibly overstep the segment bounds with writes to data anyway. Since forcing stricter limits breaks many machines and is not default behavior, it seems reasonable to deprecate the older code which may cause APM BIOS to fault. If you really have a badly enough broken APM BIOS that you have to turn off APM_RELAX_SEGMENTS, seems like the best recourse here would be to disable the APM BIOS and / or not compile it into your kernel to begin with, and / or add your system to the known bad list. The reason I want to deprecate this code is there is underlying brokenness with the set_limit macros, and getting rid of many of the call sites rather than rewriting them seems to be the simplest and most correct course of action. Signed-off-by: Zachary Amsden <zach@vmware.com> Acked-by: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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