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2009-06-07Merge branch 'linus' into core/iommuIngo Molnar
Merge reason: This branch was on an -rc5 base so pull almost-2.6.30 to resync with the latest upstream fixes and make sure the combination works fine. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-06x86: enable GART-IOMMU only after setting up protection methodsMark Langsdorf
The current code to set up the GART as an IOMMU enables GART translations before it removes the aperture from the kernel memory map, sets the GART PTEs to UC, sets up the guard and scratch pages, or does a wbinvd(). This leaves the possibility of cache aliasing open and can cause system crashes. Re-order the code so as to enable the GART translations only after all safeguards are in place and the tlb has been flushed. AMD has tested this patch on both Istanbul systems and 1st generation Opteron systems with APG enabled and seen no adverse effects. Istanbul systems with HT Assist enabled sometimes see MCE errors due to cache artifacts with the unmodified code. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> Cc: <stable@kernel.org> Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: akpm@linux-foundation.org Cc: jbarnes@virtuousgeek.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-04lguest: fix 'unhandled trap 13' with CONFIG_CC_STACKPROTECTORRusty Russell
We don't set up the canary; let's disable stack protector on boot.c so we can get into lguest_init, then set it up. As a side effect, switch_to_new_gdt() sets up %fs for us properly too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-02powerpc/pmac: Update PowerMac 32-bit defconfigBenjamin Herrenschmidt
This mostly adds back AppleTouch support and adds CONFIG_HIGHMEM by default. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-06-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Fix section attribute warnings. sparc64: Fix SET_PERSONALITY to not clip bits outside of PER_MASK.
2009-05-30Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPI, i915: build fix (v2) acpi-cpufreq: fix printk typo and indentation ACPI processor: remove spurious newline from warning message drm/i915: acpi/video.c fix section mismatch warning ACPI: video: DMI workaround broken Acer 5315 BIOS enabling display brightness ACPI: video: DMI workaround broken eMachines E510 BIOS enabling display brightness ACPI: sanity check _PSS frequency to prevent cpufreq crash i7300_idle: allow testing on i5000-series hardware w/o re-compile PCI/ACPI: fix wrong ref count handling in acpi_pci_bind() cpuidle: fix AMD C1E suspend hang cpuidle: makes AMD C1E work in acpi_idle
2009-05-29acpi-cpufreq: fix printk typo and indentationJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-05-29sparc64: Fix section attribute warnings.David S. Miller
CSUM copy to/from user assembler was missing allocatable and executable attributes for .fixup Signed-off-by: David S. Miller <davem@davemloft.net>
2009-05-29Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] update mach-types [ARM] Add cmpxchg support for ARMv6+ systems (v5) [ARM] barriers: improve xchg, bitops and atomic SMP barriers Gemini: Fix SRAM/ROM location after memory swap MAINTAINER: Add F: entries for Gemini and FA526 [ARM] disable NX support for OABI-supporting kernels [ARM] add coherent DMA mask for mv643xx_eth [ARM] pxa/palm: fix PalmLD/T5/TX AC97 MFP [ARM] pxa: add parameter to clksrc_read() for pxa168/910 [ARM] pxa: fix the incorrectly defined drive strength macros for pxa{168,910} [ARM] Orion: Remove explicit name for platform device resources [ARM] Kirkwood: Correct MPP for SATA activity/presence LEDs of QNAP TS-119/TS-219. [ARM] pxa/ezx: fix pin configuration for low power mode [ARM] pxa/spitz: provide spitz_ohci_exit() that unregisters USB_HOST GPIO [ARM] pxa: enable GPIO receivers after configuring pins [ARM] pxa: allow gpio_reset drive high during normal work [ARM] pxa: save/restore PGSR on suspend/resume.
2009-05-29x86: ignore VM_LOCKED when determining if hugetlb-backed page tables can be ↵Mel Gorman
shared or not Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13302 On x86 and x86-64, it is possible that page tables are shared beween shared mappings backed by hugetlbfs. As part of this, page_table_shareable() checks a pair of vma->vm_flags and they must match if they are to be shared. All VMA flags are taken into account, including VM_LOCKED. The problem is that VM_LOCKED is cleared on fork(). When a process with a shared memory segment forks() to exec() a helper, there will be shared VMAs with different flags. The impact is that the shared segment is sometimes considered shareable and other times not, depending on what process is checking. What happens is that the segment page tables are being shared but the count is inaccurate depending on the ordering of events. As the page tables are freed with put_page(), bad pmd's are found when some of the children exit. The hugepage counters also get corrupted and the Total and Free count will no longer match even when all the hugepage-backed regions are freed. This requires a reboot of the machine to "fix". This patch addresses the problem by comparing all flags except VM_LOCKED when deciding if pagetables should be shared or not for hugetlbfs-backed mapping. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: <starlight@binnacle.cx> Cc: Eric B Munson <ebmunson@us.ibm.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-29flat: fix data sections alignmentOskar Schirmer
The flat loader uses an architecture's flat_stack_align() to align the stack but assumes word-alignment is enough for the data sections. However, on the Xtensa S6000 we have registers up to 128bit width which can be used from userspace and therefor need userspace stack and data-section alignment of at least this size. This patch drops flat_stack_align() and uses the same alignment that is required for slab caches, ARCH_SLAB_MINALIGN, or wordsize if it's not defined by the architecture. It also fixes m32r which was obviously kaput, aligning an uninitialized stack entry instead of the stack pointer. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Oskar Schirmer <os@emlix.com> Cc: David Howells <dhowells@redhat.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Bryan Wu <cooloney@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Johannes Weiner <jw@emlix.com> Acked-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-29Merge branch 'for-rmk' of git://gitorious.org/linux-gemini/mainlineRussell King
2009-05-29[ARM] update mach-typesRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-05-28[ARM] Add cmpxchg support for ARMv6+ systems (v5)Mathieu Desnoyers
Add cmpxchg/cmpxchg64 support for ARMv6K and ARMv7 systems (original patch from Catalin Marinas <catalin.marinas@arm.com>) The cmpxchg and cmpxchg64 functions can be implemented using the LDREX*/STREX* instructions. Since operand lengths other than 32bit are required, the full implementations are only available if the ARMv6K extensions are present (for the LDREXB, LDREXH and LDREXD instructions). For ARMv6, only 32-bits cmpxchg is available. Mathieu : Make cmpxchg_local always available with best implementation for all type sizes (1, 2, 4 bytes). Make cmpxchg64_local always available. Use "Ir" constraint for "old" operand, like atomic.h atomic_cmpxchg does. Change since v3 : - Add "memory" clobbers (thanks to Nicolas Pitre) - removed __asmeq(), only needed for old compilers, very unlikely on ARMv6+. Note : ARMv7-M should eventually be ifdefed-out of cmpxchg64. But it's not supported by the Linux kernel currently. Put back arm < v6 cmpxchg support. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> CC: Catalin Marinas <catalin.marinas@arm.com> CC: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-05-28[ARM] barriers: improve xchg, bitops and atomic SMP barriersRussell King
Mathieu Desnoyers pointed out that the ARM barriers were lacking: - cmpxchg, xchg and atomic add return need memory barriers on architectures which can reorder the relative order in which memory read/writes can be seen between CPUs, which seems to include recent ARM architectures. Those barriers are currently missing on ARM. - test_and_xxx_bit were missing SMP barriers. So put these barriers in. Provide separate atomic_add/atomic_sub operations which do not require barriers. Reported-Reviewed-and-Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-05-28Merge branches 'amd-iommu/fixes', 'amd-iommu/debug', ↵Joerg Roedel
'amd-iommu/suspend-resume' and 'amd-iommu/extended-allocator' into amd-iommu/2.6.31 Conflicts: arch/x86/kernel/amd_iommu.c arch/x86/kernel/amd_iommu_init.c
2009-05-28amd-iommu: don't free dma adresses below 512MB with CONFIG_IOMMU_STRESSJoerg Roedel
This will test the automatic aperture enlargement code. This is important because only very few devices will ever trigger this code path. So force it under CONFIG_IOMMU_STRESS. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESSJoerg Roedel
This forces testing of on-demand page table allocation code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: disable round-robin allocator for CONFIG_IOMMU_STRESSJoerg Roedel
Disabling the round-robin allocator results in reusing the same dma-addresses again very fast. This is a good test if the iotlb flushing is working correctly. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: remove amd_iommu_size kernel parameterJoerg Roedel
This parameter is not longer necessary when aperture increases dynamically. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: enlarge the aperture dynamicallyJoerg Roedel
By dynamically increasing the aperture the extended allocator is now ready for use. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: handle exlusion ranges and unity mappings in alloc_new_rangeJoerg Roedel
This patch makes sure no reserved addresses are allocated in an dma_ops domain when the aperture is increased dynamically. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: move aperture_range allocation code to seperate functionJoerg Roedel
This patch prepares the dynamic increasement of dma_ops domain apertures. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: change dma_dom->next_bit to dma_dom->next_addressJoerg Roedel
Simplify the code a little bit by using the same unit for all address space related state in the dma_ops domain structure. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: make address allocator aware of multiple aperture rangesJoerg Roedel
This patch changes the AMD IOMMU address allocator to allow up to 32 aperture ranges per dma_ops domain. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: handle page table allocation failures in dma_ops codeJoerg Roedel
The code will be required when the aperture size increases dynamically in the extended address allocator. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: move page table allocation code to seperate functionJoerg Roedel
This patch makes page table allocation usable for dma_ops code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: introduce aperture_range structureJoerg Roedel
This is a preperation for extended address allocator. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: implement suspend/resumeJoerg Roedel
This patch puts everything together and enables suspend/resume support in the AMD IOMMU driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd_iommu: un __init functions required for suspend/resumeJoerg Roedel
This patch makes sure that no function required for suspend/resume of AMD IOMMU driver is thrown away after boot. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add function to flush tlb for all devicesJoerg Roedel
This function is required for suspend/resume support with AMD IOMMU enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add function to flush tlb for all domainsJoerg Roedel
This function is required for suspend/resume support with AMD IOMMU enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add function to disable all iommusJoerg Roedel
This function is required for suspend/resume support with AMD IOMMU enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: remove support for msi-xJoerg Roedel
Current hardware uses msi instead of msi-x so this code it not necessary and can not be tested. The best thing is to drop this code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: drop pointless iommu-loop in msi setup codeJoerg Roedel
It is not necessary to loop again over all IOMMUs in this code. So drop the loop. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: consolidate hardware initialization to one functionJoerg Roedel
This patch restructures the AMD IOMMU initialization code to initialize all hardware registers with one single function call. This is helpful for suspend/resume support. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: introduce for_each_iommu* macrosJoerg Roedel
This patch introduces the for_each_iommu and for_each_iommu_safe macros to simplify the developers life when having to iterate over all AMD IOMMUs in the system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd iommu: properly detach from protection domain on ->removeChris Wright
Some drivers may use the dma api during ->remove which will cause a protection domain to get reattached to a device. Delay the detach until after the driver is completely unbound. [ joro: added a little merge helper ] [ Impact: fix too early device<->domain removal ] Signed-off-by: Chris Wright <chrisw@redhat.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: make sure only ivmd entries are parsedJoerg Roedel
The bug never triggered. But it should be fixed to protect against broken ACPI tables in the future. [ Impact: protect against broken ivrs acpi table ] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: fix the handling of device aliases in the AMD IOMMU driver.Neil Turton
The devid parameter to set_dev_entry_from_acpi is the requester ID rather than the device ID since it is used to index the IOMMU device table. The handling of IVHD_DEV_ALIAS used to pass the device ID. This patch fixes it to pass the requester ID. [ Impact: fix setting the wrong req-id in acpi-table parsing ] Signed-off-by: Neil Turton <nturton@solarflare.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: fix an off-by-one error in the AMD IOMMU driver.Neil Turton
The variable amd_iommu_last_bdf holds the maximum bdf of any device controlled by an IOMMU, so the number of device entries needed is amd_iommu_last_bdf+1. The function tbl_size used amd_iommu_last_bdf instead. This would be a problem if the last device were a large enough power of 2. [ Impact: fix amd_iommu_last_bdf off-by-one error ] Signed-off-by: Neil Turton <nturton@solarflare.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: disable device isolation with CONFIG_IOMMU_STRESSJoerg Roedel
With device isolation disabled we can test better for race conditions in dma_ops related code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28x86/iommu: add IOMMU_STRESS Kconfig entryJoerg Roedel
This Kconfig option is intended to enable various code paths or parameters in IOMMU implementations to stress test the code and/or the hardware. This can also be done by disabling optimizations in the code when this option is switched on. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
2009-05-28amd-iommu: move protection domain printk to dump codeJoerg Roedel
This information is only helpful for debugging. Don't print it anymore unless explicitly requested. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: print ivmd information to dmesg when requestedJoerg Roedel
Add information about device memory mapping requirements for the IOMMU as described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: print ivhd information to dmesg when requestedJoerg Roedel
Add information about devices belonging to an IOMMU as described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add dump for iommus described in ivrs tableJoerg Roedel
Add information about IOMMU devices described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add amd_iommu_dump parameterJoerg Roedel
This kernel parameter will be useful to get some AMD IOMMU related information in dmesg that is not necessary for the default user but may be helpful in debug situations. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28Gemini: Fix SRAM/ROM location after memory swapPaulius Zaleckas
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
2009-05-27Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: Blackfin: fix strncmp.o build error Blackfin: drop unneeded asm/.gitignore Blackfin: ignore generated vmlinux.lds MAINTAINERS: drop (subscribers-only) markings on Blackfin lists MAINTAINERS: update Blackfin items Blackfin: hook up preadv/pwritev syscalls
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