- 13 Feb, 2007 40 commits
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Andi Kleen authored
- Convert last user to pfn_pte - Remove mk_pte_phys Suggested by Jan Beulich Signed-off-by:Andi Kleen <ak@suse.de>
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Jan Beulich authored
After updating several machines to 2.6.20, I can't boot anymore the single one of them that supports the NX bit and is configured as a 32-bit system. My understanding is that the VDSO changes in 2.6.20-rc7 were not fully cooked, in that with that config option enabled VDSO_SYM(x) now equals x, meaning that an address in the fixmap area is now being passed to apps via AT_SYSINFO. However, the page is mapped with PAGE_READONLY rather than PAGE_READONLY_EXEC. I'm not certain whether having app code go through the fixmap area is intended, but in case it is here is the simple patch that makes things work again. Signed-off-by:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Giuliano Procida authored
[MTRR] fix 32-bit ioctls on x64_32 Signed-off-by:
Giuliano Procida <giuliano.procida@googlemail.com> Signed-off-by:
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Andi Kleen authored
Trivial cleanup. Only change is that it is always compiled in now on x86-64 like on i386. Signed-off-by: -
Rusty Russell authored
Extern declarations belong in headers. Times, they are a'changin. Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Rusty Russell authored
When I implemented the DECLARE_PER_CPU(var) macros, I was careful that people couldn't use "var" in a non-percpu context, by prepending percpu__. I never considered that this would allow them to overload the same name for a per-cpu and a non-percpu variable. It is only one of many horrors in the i386 boot code, but let's rename the non-perpcu cpu_gdt_descr to early_gdt_descr (not boot_gdt_descr, that's something else...) Signed-off-by:
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Rusty Russell authored
Allows external actors to disable mce. Signed-off-by:
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Rusty Russell authored
The current code simply calls "start_kernel" directly if we're under a hypervisor and no paravirt_ops backend wants us, because paravirt.c registers that as a backend. This was always a vain hope; start_kernel won't get far without setup. It's also impossible for paravirt_ops backends which don't sit in the arch/i386/kernel directory: they can't link before paravirt.o anyway. Keep it simple: if we pass all the registered paravirt probes, BUG(). Signed-off-by:
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Ralf Baechle authored
> Which remembers me that I think that MIPS is using the non-compat version > of sys_epoll_pwait for compat syscalls. But maybe MIPS doesn't need a compat > syscall for some reason. Dunno. Which reminds me that x86_64 i386 compat doesn't wire up sys_epoll_pwait ;-) Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Andi Kleen authored
and in other strange binfmts. vDSO is not necessarily mapped there. Signed-off-by: -
Alan authored
The old Cyrix 5520 CPU detection code relied upon the PCI layer setup being done earlier than the CPU setup, which is no longer true. Fortunately we know that if the processor is a MediaGX we can do type 1 pci config accesses to check the companion chip. We thus do those directly and from this find the 5520 and implement the workarounds for the timer problem Original report from takada@mbf.nifty.com, I sent a proposed patch which Takara then corrected, tested and sent back to the list on 10th January. Submitting for merging as it seems to have been missed AK: Changed to use pci-direct.h and fix warning for !CONFIG_PCI (later AK: originally from akpm) Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org>
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Andi Kleen authored
Fix bogus warning linux/arch/i386/kernel/cpu/transmeta.c:12: warning: ‘cpu_freq’ may be used uninitialized in this function Signed-off-by: -
Andi Kleen authored
Fix bogus gcc warning linux/arch/i386/kernel/microcode.c:387: warning: ‘new_mc’ may be used uninitialized in this function Signed-off-by: -
Andi Kleen authored
For i386/x86-64. Straight forward -- just reuse the Family 0xf code. Signed-off-by: -
Andi Kleen authored
Just various new acronyms. The new popcnt bit is in the middle of Intel space. This looks a little weird, but I've been assured it's ok. Also I fixed RDTSCP for i386 which was at the wrong place. For i386 and x86-64. Signed-off-by: -
Andi Kleen authored
Not needed because fastcall is always default now Signed-off-by: -
Andi Kleen authored
gcc 5.0 will likely not have the constraint problem Signed-off-by: -
Eric W. Biederman authored
Occasionally the kernel has bugs that result in no irq being found for a given cpu vector. If we acknowledge the irq the system has a good chance of continuing even though we dropped an irq message. If we continue to simply print a message and not acknowledge the irq the system is likely to become non-responsive shortly there after. AK: Fixed compilation for UP kernels Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
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TAKADA Yoshihito authored
Original code doesn't write back to CCR4 register. This patch reflects a value of a register. Cc: Jordan Crouse <jordan.crouse@amd.com> Acked-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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Chuck Ebbert authored
Sometimes developers need to see more object code in an oops report, e.g. when kernel may be corrupted at runtime. Add the "code_bytes" option for this. Signed-off-by:
Chuck Ebbert <cebbert@redhat.com> Signed-off-by:
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Evgeniy Polyakov authored
If DEBUG_SIG is enbaled in source code, ia32_signal.c compiles with warning due to wrong format string. Attached patch fixes that. It is quite minor update, since by default DEBUG_SIG is not enabled and can not be turned on without code modification. Signed-off-by:
Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by:
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Roland Dreier authored
I've seen my box paralyzed by an endless spew of rtc: lost some interrupts at 1024Hz. messages on the serial console. What seems to be happening is that something real causes an interrupt to be lost and triggers the message. But then printing the message to the serial console (from the hpet interrupt handler) takes more than 1/1024th of a second, and then some more interrupts are lost, so the message triggers again.... Fix this by adding a printk_ratelimit() before printing the warning. Signed-off-by:Roland Dreier <rolandd@cisco.com> Signed-off-by:
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Benjamin Romer authored
On the Unisys ES7000/ONE system, we encountered a problem where performing a kexec reboot or dump on any cell other than cell 0 causes the system timer to stop working, resulting in a hang during timer calibration in the new kernel. We traced the problem to one line of code in disable_IO_APIC(), which needs to restore the timer's IO-APIC configuration before rebooting. The code is currently using the 4-bit physical destination field, rather than using the 8-bit logical destination field, and it cuts off the upper 4 bits of the timer's APIC ID. If we change this to use the logical destination field, the timer works and we can kexec on the upper cells. This was tested on two different cells (0 and 2) in an ES7000/ONE system. For reference, the relevant Intel xAPIC spec is kept at ftp://download.intel.com/design/chipsets/e8501/datashts/30962001.pdf, specifically on page 334. Signed-off-by:
Benjamin M Romer <benjamin.romer@unisys.com> Signed-off-by:
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Robert P. J. Day authored
Remove the unused kernel config option X86_XADD, which is unused in any source or header file. Signed-off-by:
Robert P. J. Day <rpjday@mindspring.com> Signed-off-by:
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Bob Picco authored
Eliminate arch specific memory_present call x86_64 NUMA by utilizing sparse_memory_present_with_active_regions. Acked-by:
Mel Gorman <mel@csn.ul.ie> Signed-off-by:
Bob Picco <bob.picco@hp.com> Signed-off-by:
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Jan Beulich authored
Annotate i386/kernel/entry.S with END/ENDPROC to assist disassemblers and other analysis tools. Signed-off-by:
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takada authored
I hope to support "classic" MediaGXm in kernel. The DIR1 register of MediaGXm( or Geode) shows the following values for identify CPU. For example, My MediaGXm shows 0x42. We can read National Semiconductor's datasheet without any NDAs. http://www.national.com/pf/GX/GXLV.html from datasheets: DIR1 0x30 - 0x33 GXm rev. 1.0 - 2.3 0x34 - 0x4f GXm rev. 2.4 - 3.x 0x5x GXm rev. 5.0 - 5.4 0x6x GXLV 0x7x (unknow) 0x8x Gx1 In nsc driver of X, accept 0x30 through 0x82. What will 0x7x mean? Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: Andi Kleen <ak@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Randy Dunlap authored
setcc() in math-emu is written as a gcc extension statement expression macro that returns a value. However, it's not used that way and it's not needed like that, so just make it a inline function so that we don't use an extension when it's not needed. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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H. Peter Anvin authored
All Transmeta CPUs ever produced have constant-rate TSCs. Signed-off-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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Ingo Molnar authored
During kernel bootup, a new T60 laptop (CoreDuo, 32-bit) hangs about 10%-20% of the time in acpi_init(): Calling initcall 0xc055ce1a: topology_init+0x0/0x2f() Calling initcall 0xc055d75e: mtrr_init_finialize+0x0/0x2c() Calling initcall 0xc05664f3: param_sysfs_init+0x0/0x175() Calling initcall 0xc014cb65: pm_sysrq_init+0x0/0x17() Calling initcall 0xc0569f99: init_bio+0x0/0xf4() Calling initcall 0xc056b865: genhd_device_init+0x0/0x50() Calling initcall 0xc056c4bd: fbmem_init+0x0/0x87() Calling initcall 0xc056dd74: acpi_init+0x0/0x1ee() It's a hard hang that not even an NMI could punch through! Frustratingly, adding printks or function tracing to the ACPI code made the hangs go away ... After some time an additional detail emerged: disabling the NMI watchdog made these occasional hangs go away. So i spent the better part of today trying to debug this and trying out various theories when i finally found the likely reason for the hang: if acpi_ns_initialize_devices() executes an _INI AML method and an NMI happens to hit that AML execution in the wrong moment, the machine would hang. (my theory is that this must be some sort of chipset setup method doing stores to chipset mmio registers?) Unfortunately given the characteristics of the hang it was sheer impossible to figure out which of the numerous AML methods is impacted by this problem. As a workaround i wrote an interface to disable chipset-based NMIs while executing _INI sections - and indeed this fixed the hang. I did a boot-loop of 100 separate reboots and none hung - while without the patch it would hang every 5-10 attempts. Out of caution i did not touch the nmi_watchdog=2 case (it's not related to the chipset anyway and didnt hang). I implemented this for both x86_64 and i686, tested the i686 laptop both with nmi_watchdog=1 [which triggered the hangs] and nmi_watchdog=2, and tested an Athlon64 box with the 64-bit kernel as well. Everything builds and works with the patch applied. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Muli Ben-Yehuda authored
- set bad_dma_address explicitly to 0x0 - reserve 32 pages from bad_dma_address and up - WARN_ON() a driver feeding us bad_dma_address Thanks to Leo Duran <leo.duran@amd.com> for the suggestion. Signed-off-by:
Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by:
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Jeff Garzik authored
x86-64 is missing these: Signed-off-by:
Jeff Garzik <jeff@garzik.org> Signed-off-by:
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Andi Kleen authored
We trust the e820 table, so explicitely reserving ROMs shouldn't be needed. Signed-off-by: -
Andi Kleen authored
Should be harmless because there is normally no memory there, but technically it was incorrect. Pointed out by Leo Duran Signed-off-by: -
Zachary Amsden authored
Initialize FS and GS to __KERNEL_DS as well. The actual value of them is not important, but it is important to reload them in protected mode. At this time, they still retain the real mode values from initial boot. VT disallows execution of code under such conditions, which means hardware virtualization can not be used to boot the kernel on Intel platforms, making the boot time painfully slow. This requires moving the GS load before the load of GS_BASE, so just move all the segments loads there to keep them together in the code. Signed-off-by:
Zachary Amsden <zach@vmware.com> Signed-off-by:
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Andi Kleen authored
The symbol is needed to manipulate page tables, and modules shouldn't do that. Leftover from 2.4, but no in tree module should need it now. Signed-off-by: -
Andi Kleen authored
This means if an illegal value is set for the segment registers there ptrace will error out now with an errno instead of silently ignoring it. Signed-off-by: -
Jack Steiner authored
Add failsafe mechanism to HPET/TSC clock calibration. Signed-off-by:
Jack Steiner <steiner@sgi.com> Updated to include failsafe mechanism & additional community feedback. Patch built on latest 2.6.20-rc4-mm1 tree. Signed-off-by:
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Andreas Herrmann authored
mtrr: fix size_or_mask and size_and_mask This fixes two bugs in /proc/mtrr interface: o If physical address size crosses the 44 bit boundary size_or_mask is evaluated wrong. o size_and_mask limits width of physical base address for an MTRR to be less than 44 bits. TBD: later patch had one more change, but I think that was bogus. TBD: need to double check Signed-off-by:
Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by:
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Alexey Dobriyan authored
Byte-to-byte identical /proc/apm here. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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