- 12 Jan, 2006 40 commits
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Andi Kleen authored
Much better to deal with these than with the magic numbers. And remove the comment describing the bits - kernel source is no replacement for an architecture manual. Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Andi Kleen authored
By setting a flag during a 32bit system call only Signed-off-by:
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Andi Kleen authored
Apparently helps with some non SANE scanner drivers. Cc: axboe@suse.de Signed-off-by:
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Andi Kleen authored
Don't need to do the vmalloc check for the module range because its PML4 is shared with the kernel text. Also removed an unnecessary TLB flush. Pointed out by Jan Beulich Cc: jbeulich@novell.com Signed-off-by:
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Ravikiran G Thirumalai authored
This patch is on the same lines as Zachary Amsden's i386 GDT page alignemnt patch in -mm, but for x86_64. Patch to align and pad x86_64 GDT on page boundries. [AK: some minor cleanups and fixed incorrect TLS initialization in CPU init.] Signed-off-by:
Nippun Goel <nippung@calsoftinc.com> Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Signed-off-by:
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Andi Kleen authored
This might help on distributions that use a 32bit biarch compiler. First pass -m64 by default. Secondly add some more .code32s because at least the Ubuntu biarch 32bit as called by gcc doesn't seem to handle -m64 -m32 as generated by the Makefile without such assistance. And finally make sure the linker script can be preprocessed with a 32bit cpp. Signed-off-by:
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Ross Biro authored
The attempt to avoid overflow in __delay caused varying precision on different CPUs depending on differences in the CPU speed. We should be able to do this multiplication with out overflowing provided the cpu is running at less than about 128 GHz. xloops < 20000 * 0x10c6. loops_per_jiffy * HZ <= cpu_clock_speed. So if the cpu clock speed < 2^64/(20000 * 0x10c6) = 2^64/ 51E6CC0 < 2^64/2^27 = 2^37 = 128G we will not overflow the calculation. Signed-off-by:
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Andi Kleen authored
When we don't know the node a PCI bus is connected to return -1. This matches the generic code. Noticed by Ravikiran G Thirumalai <kiran@scalex86.org> Cc: Ravikiran G Thirumalai <kiran@scalex86.org> Signed-off-by:
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Andi Kleen authored
Following kmalloc_node. Needed for another patch to return -1 for unknown nodes in x86-64. Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: kiran@scalex86.org Signed-off-by:
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Andi Kleen authored
A lot of Opteron BIOS just pass 10 in all SLIT entries (10 is the normalized unit). This is actually worse than the default heuristic because it leads to pci_distance not knowing the difference between local and remote nodes anymore. This messes up some NUMA heuristics in generic code. In this case it's better to fall back to the default heuristic which just does nodea == nodeb ? 10 : 20. This patch does some basic sanity checking on the SLIT and only accepts the SLIT when it passes. Invariants enforced are: - Node to itself shall be 10 - Any other distance shouldn't be 10 - Distances smaller than 10 are illegal Signed-off-by:
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Andi Kleen authored
And fix the test to include the size Noticed by Vivek Goyal Signed-off-by:
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Jan Beulich authored
The separation of the rex64 prefix (on fxsave/fxrstor) by way of using a semicolon resulted in the prefix not always taking effect (because when extended registers are needed for addressing, another rex prefix would have been generated by the compiler), thus (depending on the build) resulting in eventually getting 32-bit saves and/or restores. Signed-Off-By:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Andi Kleen authored
Some people need it now on 64bit so reuse the i386 code for x86-64. This will be also useful for future bug workarounds. It is a bit simplified there because there is no need to do it very early on x86-64. This means it doesn't need early ioremap et.al. We run it as a core initcall right now. I hope it's not needed for early setup. I added a general CONFIG_DMI symbol in case IA64 or someone else wants to reuse the code later too. Signed-off-by:
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Andi Kleen authored
This was a backup file that somehow made it into the official tree. Never used for anything. Remove. Signed-off-by:
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Andi Kleen authored
Signed-off-by:
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Stephen Hemminger authored
Use single instruction for find largest set bit on x86_64. [Updated by Jan Beulich to fix wrong asm constraints in original patch -AK] Cc: jbeulich@novell.com Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
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Jan Beulich authored
The introduction of call_softirq switching to the interrupt stack several releases earlier resulted in a problem with the code in show_trace, which assumes that it can pick the previous stack pointer from the end of the interrupt stack. Cc: Andi Kleen <ak@muc.de> Cc: Arjan van de Ven <arjanv@redhat.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Peter Beutner authored
Be more careful with TF handling to fix some copy protection codes in wine patch originally for i386 by Linus, then ported to x86_64 by Andi Kleen see: [PATCH] x86_64: Some fixes for single step handling commit: be61bff7 But it was never applied to the ia32 emulation code which breaks some copy-protection schemes under wine when running on x86_64. Signed-off-by:
Peter Beutner <p.beutner@gmx.net> Signed-off-by:
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Benjamin LaHaise authored
As discussed, the flags register on x86-64 is saved and restored by the assembly code which sets up struct pt_regs, so we do not need to save and restore it in the inline assembler which already informs gcc that we're clobbering the flags. This patch has been sanity booted and works okay here. Signed-off-by:
Benjamin LaHaise <benjamin.c.lahaise@intel.com> Signed-off-by:
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Eric W. Biederman authored
So why are we calling smp_send_stop from machine_halt? We don't. Looking more closely at the bug report the problem here is that halt -p is called which triggers not a halt but an attempt to power off. machine_power_off calls machine_shutdown which calls smp_send_stop. If pm_power_off is set we should never make it out machine_power_off to the call of do_exit. So pm_power_off must not be set in this case. When pm_power_off is not set we expect machine_power_off to devolve into machine_halt. So how do we fix this? Playing too much with smp_send_stop is dangerous because it must also be safe to be called from panic. It looks like the obviously correct fix is to only call machine_shutdown when pm_power_off is defined. Doing that will make Andi's assumption about not scheduling true and generally simplify what must be supported. This turns machine_power_off into a noop like machine_halt when pm_power_off is not defined. If the expected behavior is that sys_reboot(LINUX_REBOOT_CMD_POWER_OFF) becomes sys_reboot(LINUX_REBOOT_CMD_HALT) if pm_power_off is NULL this is not quite a comprehensive fix as we pass a different parameter to the reboot notifier and we set system_state to a different value before calling device_shutdown(). Unfortunately any fix more comprehensive I can think of is not obviously correct. The core problem is that there is no architecture independent way to detect if machine_power will become a noop, without calling it. Signed-off-by:
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Zwane Mwaikambo authored
I noticed that some lowlevel send_IPI_mask helpers had a hotplug/preempt race whereupon the cpu_online_map was read before disabling preemption; ... cpumask_t mask = cpu_online_map; int cpu = get_cpu(); cpu_clear(cpu, mask); ... But then i realised that there is no need for these lowlevel functions to be going through all this trouble when all the callers are already made hotplug/preempt safe. Signed-off-by:
Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by:
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Shaohua Li authored
There is one CPU here whose MCE bank count is 6. This patch increases x86_64's MCE bank count. Signed-off-by:
Shaohua Li <shaohua.li@intel.com> Signed-off-by:
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Benjamin LaHaise authored
The following is probably a good idea given that the atomic_set() isn't a barrier here either. Signed-off-by:
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Jan Beulich authored
This - switches the INT3 handler to run on an IST stack (to cope with breakpoints set by a kernel debugger on places where the kernel's %gs base hasn't been set up, yet); the IST stack used is shared with the INT1 handler's [AK: this also allows setting a kprobe on the interrupt/exception entry points] - allows nesting of INT1/INT3 handlers so that one can, with a kernel debugger, debug (at least) the user-mode portions of the INT1/INT3 handling; the nesting isn't actively enabled here since a kernel- debugger-free kernel doesn't need it Signed-Off-By:
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Andi Kleen authored
Previously apic was foced with apic=logopt was specified. Signed-off-by:
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Andi Kleen authored
It might be still needed for non APIC related issues. Signed-off-by:
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Andi Kleen authored
Print bits for RDTSCP, SVM, CR8-LEGACY. Also now print power flags on i386 like x86-64 always did. This will add a new line in the 386 cpuinfo, but that shouldn't be an issue - did that in the past too and I haven't heard of any breakage. I shrunk some of the fields in the i386 cpuinfo_x86 to chars to make up for the new int "x86_power" field. Overall it's smaller than before. Signed-off-by:
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Andi Kleen authored
They previously tried to figure this out on their own. Suggested by Venkatesh. Cc: venkatesh.pallipadi@intel.com Cc: davej@redhat.com Signed-off-by:
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Andi Kleen authored
Define it for i386 too. This is a synthetic flag that signifies that the CPU's TSC runs at a constant P state invariant frequency. Fix up the logic on x86-64/i386 to set it on all known CPUs. Use the AMD defined bit to set it on future AMD CPUs. Cc: venkatesh.pallipadi@intel.com Signed-off-by:
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Andi Kleen authored
Was only used by the floppy driver to work around some ancient hardware bug that should never occur on any 64bit system. Signed-off-by:
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Andi Kleen authored
Cc: len.brown@intel.com, ashok.ray@intel.com Signed-off-by:
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Andi Kleen authored
Most users don't need it so no need to waste memory. This means an user has to specify the appropiate number of hotplug CPUs on the command line with additional_cpus=... or fix their BIOS to follow the convention in Documentation/x86-64/cpu-hotplug-spec Signed-off-by:
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Andi Kleen authored
Noticed by Andreas Schwab Signed-off-by:
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Andi Kleen authored
head.S already clears EFLAGS completely. Following an i386 patch from Zachary Amsden. Signed-off-by:
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Andi Kleen authored
Pretty obvious Signed-off-by:
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Jan Beulich authored
Adjust page fault protection error check before considering it to be a vmalloc synchronization candidate. Signed-off-by:
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Jan Beulich authored
Make sure no iret can fault without attached recovery code. Cannot happen in the normal case, but might be useful with kernel debuggers Signed-off-by:
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Jan Beulich authored
Since a double fault always implies that kernel data structures are corrupt, this fault should neither be handed to user mode handling, nor should the handler allow resuming the faulting code stream (since architecturally this isn't a fault, but an abort). Note that this slightly depends on the previously submitted patch adjusting the prototype of notify_die() (a compiler warning will result without that other patch). AK: Removed obsolete CONFIG_CHECKING code, added comments Signed-off-by:
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Jan Beulich authored
This adjusts things so that handlers of the die() notifier will have sufficient information about the trap currently being handled. It also adjusts the notify_die() prototype to (again) match that of i386. Signed-off-by:
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Jan Beulich authored
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