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2008-01-30x86: fix NX bit handling in change_page_attr()Huang, Ying
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: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: change cpa to pfn basedIngo Molnar
change CPA to pfn based. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: keep the BIOS area executableIngo Molnar
keep the BIOS area executable. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: add PG_LEVEL enumThomas Gleixner
this way PG_LEVEL_1GB will be an easy change. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: clean up arch/x86/mm/pageattr.cIngo Molnar
do some leftover cleanups in the now unified arch/x86/mm/pageattr.c file. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: re-add clflush_cache_range()Ingo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: unify pageattr_32.c and pageattr_64.cIngo Molnar
unify the now perfectly identical pageattr_32/64.c files - no code changed. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: prepare for pageattr.c unificationIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: backmerge 64-bit details into 32-bit pageattr.cIngo Molnar
backmerge 64-bit details into 32-bit pageattr.c. the pageattr_32.c and pageattr_64.c files are now identical. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: add kernel_map_pages() to 64-bitIngo Molnar
needed for DEBUG_PAGEALLOC support and for unification. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: return -EINVAL in __change_page_attr(), instead of 0Ingo Molnar
careful: might change driver behavior - but this is the right return value. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: clean up differences between 64-bit and 32-bitIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: 64-bit, add the new split_large_page() functionIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: 64-bit pageattr.c, prepare for unificationIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: change 64-bit pageattr to use set_pte_atomic()Ingo Molnar
NOP change - same as set_pte(). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: change 64-bit __change_page_attr() to struct pageIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: simplify __change_page_attr()Ingo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: clean up and simplify 64-bit split_large_page()Ingo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: unify header part of pageattr_64.cIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: simplify pageattr_64.cIngo Molnar
simplify pageattr_64.c. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: prepare for the unification of the cpa codeIngo Molnar
prepare for the unification of the cpa code, by unifying the lookup_address() logic between 32-bit and 64-bit. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: prepare for the unification of the cpa codeIngo Molnar
prepare for the unification of the cpa code, by unifying the lookup_address() logic between 32-bit and 64-bit. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: cpa self-test, WARN_ON()Ingo Molnar
add a WARN_ON() to the cpa-self-test failure branch. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: do not PSE on CONFIG_DEBUG_PAGEALLOC=yIngo Molnar
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: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: cpa: simplify lockingIngo Molnar
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: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: simplify cpa largepage split, #3Ingo Molnar
simplify cpa largepage split: push the reference protection bits into the largepage-splitting function. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: cpa self-test fixesIngo Molnar
cpa self-test fixes. change_page_attr_addr() was buggy, it passed in a virtual address as a physical one. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: further cpa largepage-split cleanupsIngo Molnar
further cpa largepage-split cleanups: make the splitup isolated functionality, without leaking details back into __change_page_attr(). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: simplify 32-bit cpa largepage splittingIngo Molnar
simplify 32-bit cpa largepage splitting: do a pure split and repeat the pte lookup to get the new pte modified. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: simplify the 32-bit cpa codeIngo Molnar
simplify the 32-bit cpa code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: fix early_ioremap() on 64-bitAndi Kleen
Fix early_ioremap() on x86-64 I had ACPI failures on several machines since a few days. Symptom was NUMA nodes not getting detected or worse cores not getting detected. They all came from ACPI not being able to read various of its tables. I finally bisected it down to Jeremy's "put _PAGE_GLOBAL into PAGE_KERNEL" change. With that the fix was fairly obvious. The problem was that early_ioremap() didn't use a "_all" flush that would affect the global PTEs too. So with global bits getting used everywhere now an early_ioremap would not actually flush a mapping if something else was mapped previously on that slot (which can happen with early_iounmap inbetween) This patch changes all flushes in init_64.c to be __flush_tlb_all() and fixes the problem here. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: remove set_kernel_exec()Andi Kleen
The SMP trampoline always runs in real mode, so making it executable in the page tables doesn't make much sense because it executes before page tables are set up. That was the only user of set_kernel_exec(). Remove set_kernel_exec(). Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: c_p_a() make it more robust against use of PAT bitsAndi Kleen
Use the page table level instead of the PSE bit to check if the PTE is for a 4K page or not. This makes the code more robust when the PAT bit is changed because the PAT bit on 4K pages is in the same position as the PSE bit. Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: c_p_a() fix: reorder TLB / cache flushes to follow Intel recommendationAndi Kleen
Intel recommends to first flush the TLBs and then the caches on caching attribute changes. c_p_a() previously did it the other way round. Reorder that. The procedure is still not fully compliant to the Intel documentation because Intel recommends a all CPU synchronization step between the TLB flushes and the cache flushes. However on all new Intel CPUs this is now meaningless anyways because they support Self-Snoop and can skip the cache flush step anyway. [ mingo@elte.hu: decoupled from clflush and ported it to x86.git ] Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: fix c_p_a() boot crashAndi Kleen
fix: > hm, i just found a failing 64-bit .config while testing your CPA > patchset: > > [ 1.916541] CPA mapping 4k 0 large 2048 gb 0 x 0[0-0] miss 0 > [ 1.919874] Unable to handle kernel paging request at 000000000335aea8 RIP: > [ 1.919874] [<ffffffff8021d2d3>] change_page_attr+0x3/0x61 > [ 1.919874] PGD 0 > [ 1.919874] Oops: 0000 [1] > [ 1.919874] CPU 0 This handles addresses which don't have a mem_map entry. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: shrink __PAGE_KERNEL/__PAGE_KERNEL_EXEC on non PAE kernelsAndi Kleen
No need to make it 64bit there. Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: cpa: remove unnecessary masking of addressAndi Kleen
virt_to_page does not care about the bits below the page granuality. So don't mask them. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: cpa: use wbinvd() macro instead of inline assembly in 64bit c_p_a()Andi Kleen
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: early_ioremap_init(), enhance warningsIngo Molnar
enhance the debug warning in early_ioremap_init(). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: add early_ioremap() leak detectionIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: make early_ioremap_debug early_paramHuang, Ying
This patch makes "early_ioremap_debug" a early parameter, because "early_ioreamp/early_iounmap" is only used during early boot stage. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: early_ioremap(), debuggingIngo Molnar
add early_ioremap() debug printouts via the early_ioremap_debug boot option. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: add debug warnings to early_ioremap()Ingo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: enhance early_ioremap()Ingo Molnar
- allow nesting of up to 4 levels Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: early_ioremap_reset fixHuang, Ying
This patch fixes a bug of early_ioremap_reset. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86 32-bit boot: rename bt_ioremap() to early_ioremap()Huang, Ying
This patch renames bt_ioremap to early_ioremap, which is used in x86_64. This makes it easier to merge i386 and x86_64 usage. [ mingo@elte.hu: fix ] Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: replace boot_ioremap() with enhanced bt_ioremap() - remove boot_ioremap()Huang, Ying
This patch replaces boot_ioremap invokation with bt_ioremap and removes the boot_ioremap implementation. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30i386 boot: replace boot_ioremap with enhanced bt_ioremap - enhance bt_ioremapHuang, Ying
This patch makes it possible for bt_ioremap() to be used before paging_init(), via providing an early implementation of set_fixmap() that can be used before paging_init(). This way boot_ioremap() can be replaced by bt_ioremap(). Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: set strong uncacheable where UC is really desiredSiddha, Suresh B
Also use _PAGE_PWT for all the mappings which need uncache mapping. Instead of existing PAT2 which is UC- (and can be overwritten by MTRRs), we now use PAT3 which is strong uncacheable. This makes it consistent with pgprot_noncached() Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: use __PAGE_KERNEL_EXEC in ioremap_64.cJoerg Roedel
This patch replaces the manual permission setup for pages in ioremap_64.c with the pre-defined __PAGE_KERNEL_EXEC value. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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