- 30 Jan, 2008 40 commits
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Thomas Gleixner authored
The pgprot flags which are handed into ioremap_page_range() are different to those which are set in change_page_attr(). The ioremap_page_range flags are executable, while the c_p_a flags are not. Also make the mappings global (which is a NOP currently on 32bit, although CPUs from PPRO+ onwards support it, but that's a separate fix.) Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Arjan van de Ven authored
What the check_exec() function really is trying to do is enforce certain bits in the pgprot that are required by the x86 architecture, but that callers might not be aware of (such as NX bit exclusion of the BIOS area for BIOS based PCI access; it's not uncommon to ioremap the BIOS region for various purposes and normally ioremap() memory has the NX bit set). This patch turns the check_exec() function into static_protections() which also is now used to make sure the kernel text area remains non-NX and that the .rodata section remains read-only. If the architecture ends up requiring more such mandatory prot settings for specific areas, this is now a reasonable place to add these. Signed-off-by:
Arjan van de Ven <arjan@linux.intel.com> Signed-off-by:
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Ingo Molnar authored
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Huang, Ying authored
This patch fixes a bug of ioremap_nocache. ioremap_nocache() will call __ioremap() with flags != 0 to do the real work, which will call change_page_attr_addr() if phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT). But some pages between 0 ~ end_pfn_map << PAGE_SHIFT are not mapped by identity map, this will make change_page_attr_addr failed. This patch is based on latest x86 git and has been tested on x86_64 platform. Signed-off-by:
Huang Ying <ying.huang@intel.com> Signed-off-by:
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Ingo Molnar authored
add PAGE_KERNEL_EXEC_NOCACHE. Signed-off-by:
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Huang, Ying authored
This patch fixes a bug of change_page_attr/change_page_attr_addr on Intel i386/x86_64 CPUs. After changing page attribute to be executable with these functions, the page remains un-executable on Intel i386/x86_64 CPU. Because on Intel i386/x86_64 CPU, only if the "NX" bits of all three level page tables are cleared (PAE is enabled), the corresponding page is executable (refer to section 4.13.2 of Intel 64 and IA-32 Architectures Software Developer's Manual). So, the bug is fixed through clearing the "NX" bit of PMD when splitting the huge PMD. Signed-off-by:
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Ingo Molnar authored
change CPA to pfn based. Signed-off-by:
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Ingo Molnar authored
keep the BIOS area executable. Signed-off-by:
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Thomas Gleixner authored
this way PG_LEVEL_1GB will be an easy change. Signed-off-by:
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Thomas Gleixner authored
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Ingo Molnar authored
do some leftover cleanups in the now unified arch/x86/mm/pageattr.c file. Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
unify the now perfectly identical pageattr_32/64.c files - no code changed. Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
backmerge 64-bit details into 32-bit pageattr.c. the pageattr_32.c and pageattr_64.c files are now identical. Signed-off-by:
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Ingo Molnar authored
enable CONFIG_DEBUG_PAGEALLOC=y on 64-bit kernels too. preliminary testing shows that it's working fine. Signed-off-by:
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Ingo Molnar authored
needed for DEBUG_PAGEALLOC support and for unification. Signed-off-by:
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Ingo Molnar authored
careful: might change driver behavior - but this is the right return value. Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
NOP change - same as set_pte(). Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
simplify pageattr_64.c. Signed-off-by:
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Ingo Molnar authored
prepare for the unification of the cpa code, by unifying the lookup_address() logic between 32-bit and 64-bit. Signed-off-by:
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Ingo Molnar authored
prepare for the unification of the cpa code, by unifying the lookup_address() logic between 32-bit and 64-bit. Signed-off-by:
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Ingo Molnar authored
add a WARN_ON() to the cpa-self-test failure branch. Signed-off-by:
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Ingo Molnar authored
get more testing of the c_p_a() code done by not turning off PSE on DEBUG_PAGEALLOC. this simplifies the early pagetable setup code, and tests the largepage-splitup code quite heavily. In the end, all the largepages will be split up pretty quickly, so there's no difference to how DEBUG_PAGEALLOC worked before. Signed-off-by:
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Ingo Molnar authored
further simplify cpa locking: since the largepage-split is a slowpath, use the pgd_lock for the whole operation, intead of the mmap_sem. This also makes it suitable for DEBUG_PAGEALLOC purposes again. Signed-off-by:
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Ingo Molnar authored
simplify cpa largepage split: push the reference protection bits into the largepage-splitting function. Signed-off-by:
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Ingo Molnar authored
cpa self-test fixes. change_page_attr_addr() was buggy, it passed in a virtual address as a physical one. Signed-off-by:
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Ingo Molnar authored
further cpa largepage-split cleanups: make the splitup isolated functionality, without leaking details back into __change_page_attr(). Signed-off-by:
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Ingo Molnar authored
simplify 32-bit cpa largepage splitting: do a pure split and repeat the pte lookup to get the new pte modified. Signed-off-by:
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Ingo Molnar authored
simplify the 32-bit cpa code. Signed-off-by:
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Huang, Ying authored
This patch fixes some bugs of making EFI runtime code executable. - Use change_page_attr in i386 too. Because the runtime code may be mapped not through ioremap. - If there is no _PAGE_NX in __supported_pte_mask, the change_page_attr is not called. - Make efi_ioremap map pages as PAGE_KERNEL_EXEC_NOCACHE, because EFI runtime code may be mapped through efi_ioremap. Signed-off-by:
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Ingo Molnar authored
fix more __flush_tlb() instances, out of caution. Signed-off-by:
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