- 04 Feb, 2008 40 commits
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Thomas Gleixner authored
lookup_address() returns a wrong level and a wrong pointer to a non existing pte, when pmd or pud entries are marked !present. This happens for example due to boot time mapping of GART into the low memory space. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
An Athlon 64 X2 test system showed hard hangs shortly after marking the kernel text read-only, if we tried to preserve largepages and changed the PSE entry from RW to RO. The pagetable code itself is correct, it's the CPU that locked up hard (and not even the NMI watchdog could punch through that hard hang). So be conservative and always do splitups - like we did in the past. Signed-off-by: -
Thomas Gleixner authored
When CPA is called on a range which fits into a large page mapping, avoid to split the page when: 1) There is no change of attributes 2) The range to change is a complete large mapping Signed-off-by:
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Thomas Gleixner authored
Flush tlbs only when there was a real change. Signed-off-by:
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Thomas Gleixner authored
The number of arguments which need to be transported is increasing and we want to add flush optimizations and large page preserving. Create struct cpa data and pass a pointer instead of increasing the number of arguments further. Signed-off-by:
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Andi Kleen authored
We only need to flush the caches in cpa() if the the caching attributes have changed. Otherwise only flush the TLBs. This checks the PAT bits too although they are currently not used by the kernel. Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Andi Kleen authored
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Thomas Gleixner authored
Mask out the not supported bits (e.g. NX). If the clr/set masks are empty after the mask return without changing anything. Signed-off-by:
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Huang, Ying authored
The patch updates EFI runtime memory mapping code, by making EFI areas explicitly executable. Signed-off-by:
Huang Ying <ying.huang@intel.com> Signed-off-by:
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Thomas Gleixner authored
When an ioremap is unmapped, do not change the page attributes. There might be another mapping of the same physical address. PAT might detect a conflicting mapping attribute for no good reason. The mapping is removed anyway. Signed-off-by:
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Thomas Gleixner authored
Now that cpa works on non-direct mappings as well, we can safely remove the range check in ioremap_change_attr(). Signed-off-by:
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Thomas Gleixner authored
Remove tons of castings which make the code hard to read. Signed-off-by:
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Thomas Gleixner authored
When splitting large pages, we ge the pfn from the existing entry instead of calculating it ourself. This removes the last remaining range restriction of the cpa code. Signed-off-by:
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Arjan van de Ven authored
When changing the attributes of a pte, we should use the PFN from the existing PTE rather than going through hoops calculating what we think it might have been; this is both fragile and totally unneeded. It also makes it more hairy to call any of these functions on non-direct maps for no good reason whatsover. With this change, __change_page_attr() no longer takes a pfn as argument, which simplifies all the callers. Signed-off-by:
Arjan van de Ven <arjan@linux.intel.com> Signed-off-by:
Thomas Gleixner <tglx@tglx.de>
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Arjan van de Ven authored
Right now, enforcing that the high mapping of the kernel text doesn't get the NX bit is done deep in the guts of CPA, rather than in the static_protection() function that enforces all other per-arch sanity checks. This patch moves this sanity check into the central static_protection() function instead, and makes it apply ONLY to the kernel text, not to all other areas in the high mapping. Signed-off-by:
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Harvey Harrison authored
mtrr.h was included everywhere needed. Fixes the following sparse warnings. Also, the return types in the extern definitions were incorrect. arch/x86/kernel/cpu/mtrr/amd.c:113:12: warning: symbol 'amd_init_mtrr' was not declared. Should it be static? arch/x86/kernel/cpu/mtrr/cyrix.c:268:12: warning: symbol 'cyrix_init_mtrr' was not declared. Should it be static? arch/x86/kernel/cpu/mtrr/centaur.c:218:12: warning: symbol 'centaur_init_mtrr' was not declared. Should it be static? Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Harvey Harrison authored
cpu.h was already included everywhere needed. Fixes following sparse warnings: arch/x86/kernel/cpu/amd.c:343:12: warning: symbol 'amd_init_cpu' was not declared. Should it be static? arch/x86/kernel/cpu/cyrix.c:444:12: warning: symbol 'cyrix_init_cpu' was not declared. Should it be static? arch/x86/kernel/cpu/cyrix.c:456:12: warning: symbol 'nsc_init_cpu' was not declared. Should it be static? arch/x86/kernel/cpu/centaur.c:467:12: warning: symbol 'centaur_init_cpu' was not declared. Should it be static? arch/x86/kernel/cpu/transmeta.c:112:12: warning: symbol 'transmeta_init_cpu' was not declared. Should it be static? arch/x86/kernel/cpu/intel.c:296:12: warning: symbol 'intel_cpu_init' was not declared. Should it be static? arch/x86/kernel/cpu/nexgen.c:56:12: warning: symbol 'nexgen_init_cpu' was not declared. Should it be static? arch/x86/kernel/cpu/umc.c:22:12: warning: symbol 'umc_init_cpu' was not declared. Should it be static? Signed-off-by:
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Harvey Harrison authored
arch/x86/kernel/process_32.c:254:43: warning: Using plain integer as NULL pointer Signed-off-by:
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Harvey Harrison authored
Global functions should include their prototypes. Signed-off-by:
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Harvey Harrison authored
Fixes sparse warning: arch/x86/kernel/cpu/intel.c:48:15: warning: symbol 'ppro_with_ram_bug' was not declared. Should it be static? Signed-off-by:
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Harvey Harrison authored
A few snuck back in to x86. Signed-off-by:
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Andi Kleen authored
Now that the only user does it on its own remove the NUMAQ support macros in io_32.h The next step would be to convert the preprocessor mess to actually readable standard inlines. Signed-off-by:
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Andi Kleen authored
numa.c is the only user of the {in,out}*_quad functions. And it has only a few call sites. Change them to open code the magic NUMAQ port access. Signed-off-by: -
Cyrill Gorcunov authored
This patch eliminates numbers in LDT allocation code trying to make it clear to understand from where these numbers come. No code changed: text data bss dec hex filename 1896 0 0 1896 768 ldt.o.before 1896 0 0 1896 768 ldt.o.after md5: 6cbec8705008ddb4b704aade60bceda3 ldt.o.before.asm 6cbec8705008ddb4b704aade60bceda3 ldt.o.after.asm Signed-off-by:
Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by:
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Jeremy Fitzhardinge authored
Remove bogus reference to "Pentium-II erratum A13" and point to the actual canonical source of information about what requirements x86 processors have for PAE pagetable updates. Signed-off-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by:
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Jeremy Fitzhardinge authored
Rather than unconditionally reloading cr3, only do so if the pud we're updating is within the active pgd. This eliminates TLB flushes most of the time. The performance-critical uses of pud_clear are during execve and exit, but in those cases cr3 is referring to some other pagetable. The only other use of pud_clear is during a large (1Gbyte+) munmap, and those are sufficiently rare that a couple of cr3 reloads won't hurt. Signed-off-by:
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Jeremy Fitzhardinge authored
Revert "defer cr3 reload when doing pud_clear()" since I'm going to replace it. Signed-off-by:
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Jeremy Fitzhardinge authored
The constructors for PAE and non-PAE pgd_ctors are more or less identical, and can be made into the same function. Signed-off-by:
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Rob Landley authored
Signed-off-by:
Rob Landley <rob@landley.net> Cc: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Pavel Machek authored
Both trampolines actually *do* set up stack. (Is the "we jump into compressed/head.S" comment still true?) Signed-off-by:
Pavel Machek <pavel@suse.cz> Signed-off-by:
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Harvey Harrison authored
include/asm/string_32.h:216:26: warning: cast truncates bits from constant value (cccccccc becomes cc) include/asm/string_32.h:219:27: warning: cast truncates bits from constant value (cccccccc becomes cccc) include/asm/string_32.h:222:27: warning: cast truncates bits from constant value (cccccccc becomes cccc) include/asm/string_32.h:223:30: warning: cast truncates bits from constant value (cccccccc becomes cc) Signed-off-by:
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Harvey Harrison authored
cyrix_arr_init was #if 0 all the way back to at least v2.6.12. This was the only place where arr3_protected was set to anything but zero. Eliminate this variable. Signed-off-by:
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H. Peter Anvin authored
Remove unused <linux/quicklist.h> from <asm-generic/tlb.h>; per Christoph Lameter this should have been part of a previous patch reversal but apparently didn't get removed. Signed-off-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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H. Peter Anvin authored
Instead of obscure numbers, print the list of missing CPU features in cleartext. To conserve space, use a host program (mkcpustr.c) to produce a compact list of mandatory features only. Signed-off-by:
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H. Peter Anvin authored
Move the CPU feature string names to a separate file (common to 32 and 64 bits); additionally, make <asm/cpufeature.h> includable by host code in preparation for including the CPU feature strings in the boot code. Signed-off-by:
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H. Peter Anvin authored
The volatile keyword was removed from the clflush() prototype in commit e34907ae; the comment there states: x86: remove volatile keyword from clflush. the p parameter is an explicit memory reference, and is enough to prevent gcc to being nasty here. The volatile seems completely not needed. This reflects incorrect understanding of the function of the volatile keyword there. The purpose of the volatile keyword is informing gcc that it is safe to pass a volatile pointer to this function. Signed-off-by:
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H. Peter Anvin authored
Instead of grabbing the BKL on seek, use the inode mutex in the style of generic_file_llseek(). Signed-off-by:
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H. Peter Anvin authored
After /dev/*/cpuid was introduced, Intel changed the semantics of the CPUID instruction to be sentitive to %ecx as well as %eax. This patch allows querying of %ecx-sensitive levels by placing the %ecx value in the upper 32 bits of the file position (lower 32 bits always were used for the %eax value.) Signed-off-by:
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H. Peter Anvin authored
Use the _ASM_EXTABLE macro from <asm/asm.h>, instead of open-coding __ex_table entires in include/asm-x86/uaccess_64.h. Signed-off-by:
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H. Peter Anvin authored
Use the _ASM_EXTABLE macro from <asm/asm.h>, instead of open-coding __ex_table entires in include/asm-x86/uaccess_32.h. Signed-off-by:
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