- 07 Dec, 2006 40 commits
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Paolo 'Blaisorblade' Giarrusso authored
Port two patches from i386 to x86_64 delay.c to make sure all rounding is done upward instead of downward. There is no sign in commit messages that the mismatch was done on purpose, and "delay() guarantees sleeping at least for the specified time" is still a valid rule IMHO. The original x86 patches are both from pre-GIT era, i.e.: "[PATCH] round up in __udelay()" in commit 54c7e1f5cc6771ff644d7bc21a2b829308bd126f "[PATCH] add 1 in __const_udelay()" in commit 42c77a9801b8877d8b90f65f75db758822a0bccc (both commits are from converted BK repository to x86_64). AK: fixed gcc warning linux/arch/x86_64/lib/delay.c:43: warning: suggest parentheses around + or - inside shift (did this actually work?) Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
Andi Kleen <ak@suse.de>
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Muli Ben-Yehuda authored
This patch makes it possible to compile Calgary in but not use it by default. In this mode, use 'iommu=calgary' to activate it. Signed-off-by:
Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by:
Jon Mason <jdmason@kudzu.us> Signed-off-by:
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Muli Ben-Yehuda authored
This patch cleans up the previous "Use BIOS supplied BBAR information" patch. Mostly stylistic clenaups, but also check for ioremap failure when we ioremap the BBAR rather than when trying to use it. Signed-off-by:
Laurent Vivier <Laurent.Vivier@bull.net>
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Laurent Vivier authored
Find the BBAR register address of each Calgary using the "Extended BIOS Data Area" rather than calculating it ourselves. Also get the bus topology (what PHB each bus is on) from Calgary rather than calculating it ourselves. This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=7407. Signed-off-by:
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Muli Ben-Yehuda authored
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bibo,mao authored
This patch moves e820 memory map print and memmap boot param parsing function from setup.c to e820.c, also adds limit_regions and print_memory_map declaration in header file. Signed-off-by:
bibo,mao <bibo.mao@intel.com> Signed-off-by:
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bibo,mao authored
This patch moves e820/efi memmap table walking function from setup.c to e820.c, also this patch adds extern declaration in header file. Signed-off-by:
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bibo,mao authored
Move more code from setup.c into e820.c Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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bibo,mao authored
This patch moves bios e820 map sanitize and copy function from setup.c to e820.c Signed-off-by:
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bibo,mao authored
This patch creates new file named e820.c to hanle standard io/mem resources, moving request_standard_resources function from setup.c to e820.c. Also this patch modifies Makfile to compile file e820.c. Signed-off-by:
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Albert Cahalan authored
The recent change to make x86_64 support i386 binaries compiled with -mregparm=3 only covered signal handlers without SA_SIGINFO. (the 3-arg "real-time" ones) To be compatible with i386, both types should be supported. Signed-off-by:
Albert Cahalan <acahalan@gmail.com> Signed-off-by:
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Andi Kleen authored
Instead of adding all kinds of more quirks try various timer routing variants in check_timer. In particular this tries to handle quirks from: - Nvidia NF2-4 reference BIOS: wrong timer override - Asus: Wrong timer override but no HPET table - ATI: require timer disabled in 8259 - Some boards: require timer enabled in 8259 We just try many of the the known variants in the hopefully right order in check_timer. Trying pin 0/2 on Nvidia suggested by Tim Hockin. TBD Experimental. Needs a lot of testing Signed-off-by: -
Andi Kleen authored
Makes the intention of the code cleaner to read and avoids a potential deadlock on mmap_sem. Also change the types of the arguments to not include __user because they're really not user addresses. Signed-off-by: -
Andi Kleen authored
Instead of open coded __get_user Signed-off-by: -
Andi Kleen authored
Caller of probe_kernel_address shouldn't need to know that pka is internally implemented with __get_user. So move the __user cast into pka. Signed-off-by: -
Yinghai Lu authored
Clear the irq releated entries in irq_vector, irq_domain and vector_irq instead of clearing irq_vector only. So when new irq is created, it could reuse that vector. (actually is the second loop scanning from FIRST_DEVICE_VECTOR+8). This could avoid the vectors are used up with enough module inserting and removing Cc: Eric W. Biedierman <ebiederm@xmission.com> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-By:
Yinghai Lu <yinghai.lu@amd.com> Signed-off-by:
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Andi Kleen authored
CLFLUSH is a lot faster than WBINVD so try to use that. Signed-off-by: -
Andi Kleen authored
Also report it in /proc/cpuinfo similar to x86-64. Needed for followon patch Signed-off-by: -
Andi Kleen authored
CLFLUSH is a lot faster than WBINVD so avoid the later if at all possible. Always pass the complete list of pages to other CPUs to cut down the number of IPIs. Minor other cleanup and sync with i386 version. Signed-off-by: -
Joe Korty authored
The entry.S code at work_notifysig is surely wrong. It drops into unrelated code if the branch to work_notifysig_v86 is taken, and CONFIG_VM86=n. [PATCH] Make vm86 support optional tree 9b5daef5280800a0006343a17f63072658d91a1d pushed to git Jan 8, 2006, and first appears in 2.6.16 The 'fix' here is to also compile out the vm86 test & branch when CONFIG_VM86=n. Signed-off-by:
Joe Korty <joe.korty@ccur.com> Signed-off-by:
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Avi Kivity authored
Code that wants to use struct desc_struct cannot do so on i386 because desc.h contains other code that will only compile on x86_64. So extract the structure definitions into a asm-x86_64/desc_defs.h. Signed-off-by:
Avi Kivity <avi@qumranet.com> Signed-off-by:
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Vivek Goyal authored
Signed-off-by:
Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by:
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Vivek Goyal authored
Extend bzImage protocol to enable bootloaders to load a completely relocatable bzImage. Now protected mode component of kernel is also relocatable and a boot-loader can load the protected mode component at a differnt physical address than 1MB. (If kernel was built with CONFIG_RELOCATABLE) Kexec can make use of it to load this kernel at a different physical address to capture kernel crash dumps. Signed-off-by:
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Vivek Goyal authored
o Now CONFIG_PHYSICAL_START is being replaced with CONFIG_PHYSICAL_ALIGN. Hardcoding the kernel physical start value creates a problem in relocatable kernel context due to boot loader limitations. For ex, if somebody compiles a relocatable kernel to be run from address 4MB, but this kernel will run from location 1MB as grub loads the kernel at physical address 1MB. Kernel thinks that I am a relocatable kernel and I should run from the address I have been loaded at. So somebody wanting to run kernel from 4MB alignment location (for improved performance regions) can't do that. o Hence, Eric proposed that probably CONFIG_PHYSICAL_ALIGN will make more sense in relocatable kernel context. At run time kernel will move itself to a physical addr location which meets user specified alignment restrictions. Signed-off-by:
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Vivek Goyal authored
o Relocations generated w.r.t absolute symbols are not processed as by definition, absolute symbols are not to be relocated. Explicitly warn user about absolutions relocations present at compile time. o These relocations get introduced either due to linker optimizations or some programming oversights. o Also create a list of symbols which have been audited to be safe and don't emit warnings for these. Signed-off-by:
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Eric W. Biederman authored
This patch modifies the i386 kernel so that if CONFIG_RELOCATABLE is selected it will be able to be loaded at any 4K aligned address below 1G. The technique used is to compile the decompressor with -fPIC and modify it so the decompressor is fully relocatable. For the main kernel relocations are generated. Resulting in a kernel that is relocatable with no runtime overhead and no need to modify the source code. A reserved 32bit word in the parameters has been assigned to serve as a stack so we figure out where are running. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
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Eric W. Biederman authored
Print the addresses of non-absolute symbols relative to _text so that ld will generate relocations. Allowing a relocatable kernel to relocate them. We can't actually use the symbol names because kallsyms includes static symbols that are not exported from their object files. Add the _text symbol definitions to the architectures which don't define it otherwise linker will fail. Signed-off-by:
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Eric W. Biederman authored
Defining __PHYSICAL_START and __KERNEL_START in asm-i386/page.h works but it triggers a full kernel rebuild for the silliest of reasons. This modifies the users to directly use CONFIG_PHYSICAL_START and linux/config.h which prevents the full rebuild problem, which makes the code much more maintainer and hopefully user friendly. Signed-off-by:
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Eric W. Biederman authored
Currently when we are reserving the memory the kernel text resides in we start at __PHYSICAL_START which happens to be correct but not very obvious. In addition when we start relocating the kernel __PHYSICAL_START is the wrong value, as it is an absolute symbol that does not get relocated. By starting the reservation at __pa_symbol(_text) the code is clearer and will be correct when relocated. Signed-off-by:
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Eric W. Biederman authored
On x86_64 we have to be careful with calculating the physical address of kernel symbols. Both because of compiler odditities and because the symbols live in a different range of the virtual address space. Having a defintition of __pa_symbol that works on both x86_64 and i386 simplifies writing code that works for both x86_64 and i386 that has these kinds of dependencies. So this patch adds the trivial i386 __pa_symbol definition. Added assembly magic similar to RELOC_HIDE as suggested by Andi Kleen. Just picked it up from x86_64. Signed-off-by:
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Vivek Goyal authored
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Vivek Goyal authored
Ld knows about 2 kinds of symbols, absolute and section relative. Section relative symbols symbols change value when a section is moved and absolute symbols do not. Currently in the linker script we have several labels marking the beginning and ending of sections that are outside of sections, making them absolute symbols. Having a mixture of absolute and section relative symbols refereing to the same data is currently harmless but it is confusing. This must be done carefully as newer revs of ld do not place symbols that appear in sections without data and instead ld makes those symbols global :( My ultimate goal is to build a relocatable kernel. The safest and least intrusive technique is to generate relocation entries so the kernel can be relocated at load time. The only penalty would be an increase in the size of the kernel binary. The problem is that if absolute and relocatable symbols are not properly specified absolute symbols will be relocated or section relative symbols won't be, which is fatal. The practical motivation is that when generating kernels that will run from a reserved area for analyzing what caused a kernel panic, it is simpler if you don't need to hard code the physical memory location they will run at, especially for the distributions. [AK: and merged:] o Also put a message so that in future people can be aware of it and avoid introducing absolute symbols. Signed-off-by:
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Andi Kleen authored
This network ioctl wasn't handled before. Reported by Alexandra.Kossovsky@oktetlabs.ru (Alexandra Kossovsky) Signed-off-by: -
Andi Kleen authored
On modern systems RAM errors don't cause NMIs, but it's usually caused by PCI SERR. Mention PCI instead of RAM in the printk. Reported by r_hayashi@ctc-g.co.jp (Ryutaro Hayashi) Cc: r_hayashi@ctc-g.co.jp Signed-off-by: -
Alan Cox authored
Resending as I believe the discussion about them established they were correct. Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Andi Kleen authored
Currently the idle loop has two nested loops -- one high level in cpu_idle and in some low level idle functions another one. Looping in the low level idle functions breaks the idle notifiers because interrupts waking up sleep states need to execute exit_idle() which is only in cpu_idle(). So don't do that, only loop in cpu_idle(). This only removes code. In some cases e.g. poll_idle the idle loop is a little longer now because cpu_idle checks more things. I hope that isn't a problem ACPI idle doesn't change behaviour because it never looped anyways. Cc: len.brown@intel.com Cc: eranian@hpl.hp.com Signed-off-by: -
Andi Kleen authored
This patch fixes the math emulator, which had not been adjusted to match the changed struct pt_regs. AK: extracted from larger patch by Jeremy. Signed-off-by: -
Jeremy Fitzhardinge authored
Signed-off-by:
Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Jeremy Fitzhardinge authored
Use the pcurrent field in the PDA to implement the "current" macro. This ends up compiling down to a single instruction to get the current task. Signed-off-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by:
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Jeremy Fitzhardinge authored
Use the cpu_number in the PDA to implement raw_smp_processor_id. This is a little simpler than using thread_info, though the cpu field in thread_info cannot be removed since it is used for things other than getting the current CPU in common code. Signed-off-by:
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