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2010-10-30Merge git://git.infradead.org/mtd-2.6Linus Torvalds1-2/+32
* git://git.infradead.org/mtd-2.6: (82 commits) mtd: fix build error in m25p80.c mtd: Remove redundant mutex from mtd_blkdevs.c MTD: Fix wrong check register_blkdev return value Revert "mtd: cleanup Kconfig dependencies" mtd: cfi_cmdset_0002: make sector erase command variable mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips mtd: cfi_util: add support for switching SST 39VF640xB chips into QRY mode mtd: cfi_cmdset_0001: use defined value of P_ID_INTEL_PERFORMANCE instead of hardcoded one block2mtd: dubious assignment P4080/mtd: Fix the freescale lbc issue with 36bit mode P4080/eLBC: Make Freescale elbc interrupt common to elbc devices mtd: phram: use KBUILD_MODNAME mtd: OneNAND: S5PC110: Fix double call suspend & resume function mtd: nand: fix MTD_MODE_RAW writes jffs2: use kmemdup mtd: sm_ftl: cosmetic, use bool when possible mtd: r852: remove useless pci powerup/down from suspend/resume routines mtd: blktrans: fix a race vs kthread_stop mtd: blktrans: kill BKL mtd: allow to unload the mtdtrans module if its block devices aren't open ... Fix up trivial whitespace-introduced conflict in drivers/mtd/mtdchar.c
2010-10-30Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.gitDavid Woodhouse34-145/+470
Conflicts: drivers/mtd/mtd_blkdevs.c Merge Grant's device-tree bits so that we can apply the subsequent fixes. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-29Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdbLinus Torvalds1-0/+1
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: kgdb,ppc: Individual register get/set for ppc kgdbts: prevent re-entry to kgdbts before it unregisters debug_core,x86,blackfin: Clean up hw debug disable API kdb: Fix early debugging crash regression kgdb,arm: fix register dump kdb: fix per_cpu command to remove supress mask kdb: Add kdb kernel module sample
2010-10-29kgdb,ppc: Individual register get/set for ppcDongdong Deng1-0/+1
commit 534af1082329392bc29f6badf815e69ae2ae0f4c(kgdb,kdb: individual register set and and get API) introduce dbg_get_reg/dbg_set_reg API for individual register get and set. This patch implement those APIs for ppc. Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-10-27Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_txLinus Torvalds1-137/+0
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (48 commits) DMAENGINE: move COH901318 to arch_initcall dma: imx-dma: fix signedness bug dma/timberdale: simplify conditional ste_dma40: remove channel_type ste_dma40: remove enum for endianess ste_dma40: remove TIM_FOR_LINK option ste_dma40: move mode_opt to separate config ste_dma40: move channel mode to a separate field ste_dma40: move priority to separate field ste_dma40: add variable to indicate valid dma_cfg async_tx: make async_tx channel switching opt-in move async raid6 test to lib/Kconfig.debug dmaengine: Add Freescale i.MX1/21/27 DMA driver intel_mid_dma: change the slave interface intel_mid_dma: fix the WARN_ONs intel_mid_dma: Add sg list support to DMA driver intel_mid_dma: Allow DMAC2 to share interrupt intel_mid_dma: Allow IRQ sharing intel_mid_dma: Add runtime PM support DMAENGINE: define a dummy filter function for ste_dma40 ...
2010-10-27taskstats: use real microsecond granularity for CPU timesMichael Holzheu1-6/+6
The taskstats interface uses microsecond granularity for the user and system time values. The conversion from cputime to the taskstats values uses the cputime_to_msecs primitive which effectively limits the granularity to milliseconds. Add the cputime_to_usecs primitive for architectures that have better, more precise CPU time values. Remove cputime_to_msecs primitive because there are no more users left. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Luck Tony <tony.luck@intel.com> Cc: Shailabh Nagar <nagar1234@in.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Shailabh Nagar <nagar@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26mm: remove pte_*map_nested()Peter Zijlstra2-8/+2
Since we no longer need to provide KM_type, the whole pte_*map_nested() API is now redundant, remove it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26mm: stack based kmap_atomic()Peter Zijlstra1-5/+4
Keep the current interface but ignore the KM_type and use a stack based approach. The advantage is that we get rid of crappy code like: #define __KM_PTE \ (in_nmi() ? KM_NMI_PTE : \ in_irq() ? KM_IRQ_PTE : \ KM_PTE0) and in general can stop worrying about what context we're in and what kmap slots might be appropriate for that. The downside is that FRV kmap_atomic() gets more expensive. For now we use a CPP trick suggested by Andrew: #define kmap_atomic(page, args...) __kmap_atomic(page) to avoid having to touch all kmap_atomic() users in a single patch. [ not compiled on: - mn10300: the arch doesn't actually build with highmem to begin with ] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c] Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-25Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6Linus Torvalds1-35/+76
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (365 commits) ALSA: hda - Disable sticky PCM stream assignment for AD codecs ALSA: usb - Creative USB X-Fi volume knob support ALSA: ca0106: Use card specific dac id for mute controls. ALSA: ca0106: Allow different sound cards to use different SPI channel mappings. ALSA: ca0106: Create a nice spot for mapping channels to dacs. ALSA: ca0106: Move enabling of front dac out of hardcoded setup sequence. ALSA: ca0106: Pull out dac powering routine into separate function. ALSA: ca0106 - add Sound Blaster 5.1vx info. ASoC: tlv320dac33: Use usleep_range for delays ALSA: usb-audio: add Novation Launchpad support ALSA: hda - Add workarounds for CT-IBG controllers ALSA: hda - Fix wrong TLV mute bit for STAC/IDT codecs ASoC: tpa6130a2: Error handling for broken chip ASoC: max98088: Staticise m98088_eq_band ASoC: soc-core: Fix codec->name memory leak ALSA: hda - Apply ideapad quirk to Acer laptops with Cxt5066 ALSA: hda - Add some workarounds for Creative IBG ALSA: hda - Fix wrong SPDIF NID assignment for CA0110 ALSA: hda - Fix codec rename rules for ALC662-compatible codecs ALSA: hda - Add alc_init_jacks() call to other codecs ...
2010-10-25P4080/mtd: Fix the freescale lbc issue with 36bit modeLan Chunhe-B258061-0/+1
When system uses 36bit physical address, res.start is 36bit physical address. But the function of in_be32 returns 32bit physical address. Then both of them compared each other is wrong. So by converting the address of res.start into the right format fixes this issue. Signed-off-by: Lan Chunhe-B25806 <b25806@freescale.com> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Reviewed-by: Anton Vorontsov <cbouatmailru@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25P4080/eLBC: Make Freescale elbc interrupt common to elbc devicesRoy Zang1-2/+31
Move Freescale elbc interrupt from nand driver to elbc driver. Then all elbc devices can use the interrupt instead of ONLY nand. For former nand driver, it had the two functions: 1. detecting nand flash partitions; 2. registering elbc interrupt. Now, second function is removed to fsl_lbc.c. Signed-off-by: Lan Chunhe-B25806 <b25806@freescale.com> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Reviewed-by: Anton Vorontsov <cbouatmailru@gmail.com> Cc: Wood Scott-B07421 <B07421@freescale.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25Merge branch 'topic/asoc' into for-linusTakashi Iwai1-35/+76
Conflicts: arch/powerpc/platforms/85xx/p1022_ds.c
2010-10-24Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivialLinus Torvalds1-1/+1
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) Update broken web addresses in arch directory. Update broken web addresses in the kernel. Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget Revert "Fix typo: configuation => configuration" partially ida: document IDA_BITMAP_LONGS calculation ext2: fix a typo on comment in ext2/inode.c drivers/scsi: Remove unnecessary casts of private_data drivers/s390: Remove unnecessary casts of private_data net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data drivers/infiniband: Remove unnecessary casts of private_data drivers/gpu/drm: Remove unnecessary casts of private_data kernel/pm_qos_params.c: Remove unnecessary casts of private_data fs/ecryptfs: Remove unnecessary casts of private_data fs/seq_file.c: Remove unnecessary casts of private_data arm: uengine.c: remove C99 comments arm: scoop.c: remove C99 comments Fix typo configue => configure in comments Fix typo: configuation => configuration Fix typo interrest[ing|ed] => interest[ing|ed] Fix various typos of valid in comments ... Fix up trivial conflicts in: drivers/char/ipmi/ipmi_si_intf.c drivers/usb/gadget/rndis.c net/irda/irnet/irnet_ppp.c
2010-10-24Merge branch 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds6-25/+172
* 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (321 commits) KVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pages KVM: Fix signature of kvm_iommu_map_pages stub KVM: MCE: Send SRAR SIGBUS directly KVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTED KVM: fix typo in copyright notice KVM: Disable interrupts around get_kernel_ns() KVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root address KVM: MMU: move access code parsing to FNAME(walk_addr) function KVM: MMU: audit: check whether have unsync sps after root sync KVM: MMU: audit: introduce audit_printk to cleanup audit code KVM: MMU: audit: unregister audit tracepoints before module unloaded KVM: MMU: audit: fix vcpu's spte walking KVM: MMU: set access bit for direct mapping KVM: MMU: cleanup for error mask set while walk guest page table KVM: MMU: update 'root_hpa' out of loop in PAE shadow path KVM: x86 emulator: Eliminate compilation warning in x86_decode_insn() KVM: x86: Fix constant type in kvm_get_time_scale KVM: VMX: Add AX to list of registers clobbered by guest switch KVM guest: Move a printk that's using the clock before it's ready KVM: x86: TSC catchup mode ...
2010-10-24KVM: PPC: Move of include to __KERNEL__ sectionAlexander Graf1-1/+2
We have to protect the include for linux/of.h by __KERNEL__ so it doesn't accidently get referenced outside. This patch fixes this and makes the tree compile again. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2010-10-24KVM: PPC: Implement Level interrupts on Book3SAlexander Graf2-1/+4
The current interrupt logic is just completely broken. We get a notification from user space, telling us that an interrupt is there. But then user space expects us that we just acknowledge an interrupt once we deliver it to the guest. This is not how real hardware works though. On real hardware, the interrupt controller pulls the external interrupt line until it gets notified that the interrupt was received. So in reality we have two events: pulling and letting go of the interrupt line. To maintain backwards compatibility, I added a new request for the pulling part. The letting go part was implemented earlier already. With this in place, we can now finally start guests that do not randomly stall and stop to work at random times. This patch implements above logic for Book3S. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-10-24KVM: PPC: Implement correct SID mapping on Book3s_32Alexander Graf1-2/+13
Up until now we were doing segment mappings wrong on Book3s_32. For Book3s_64 we were using a trick where we know that a single mmu_context gives us 16 bits of context ids. The mm system on Book3s_32 instead uses a clever algorithm to distribute VSIDs across the available range, so a context id really only gives us 16 available VSIDs. To keep at least a few guest processes in the SID shadow, let's map a number of contexts that we can use as VSID pool. This makes the code be actually correct and shouldn't hurt performance too much. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-10-24KVM: PPC: Put segment registers in shared pageAlexander Graf2-1/+1
Now that the actual mtsr doesn't do anything anymore, we can move the sr contents over to the shared page, so a guest can directly read and write its sr contents from guest context. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-10-24KVM: PPC: Interpret SR registers on demandAlexander Graf1-10/+1
Right now we're examining the contents of Book3s_32's segment registers when the register is written and put the interpreted contents into a struct. There are two reasons this is bad. For starters, the struct has worse real-time performance, as it occupies more ram. But the more important part is that with segment registers being interpreted from their raw values, we can put them in the shared page, allowing guests to mess with them directly. This patch makes the internal representation of SRs be u32s. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-10-24KVM: PPC: Add feature bitmap for magic pageAlexander Graf1-0/+2
We will soon add SR PV support to the shared page, so we need some infrastructure that allows the guest to query for features KVM exports. This patch adds a second return value to the magic mapping that indicated to the guest which features are available. Signed-off-by: Alexander Graf <agraf@suse.de>
2010-10-24KVM: PPC: Make long relocations be ulongAlexander Graf1-2/+2
On Book3S KVM we directly expose some asm pointers to C code as variables. These need to be relocated and thus break on relocatable kernels. To make sure we can at least build, let's mark them as long instead of u32 where 64bit relocations don't work. This fixes the following build error: WARNING: 2 bad relocations^M > c000000000008590 R_PPC64_ADDR32 .text+0x4000000000008460^M > c000000000008594 R_PPC64_ADDR32 .text+0x4000000000008598^M Please keep in mind that actually using KVM on a relocated kernel might still break. This only fixes the compile problem. Reported-by: Subrata Modak <subrata@linux.vnet.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Add book3s_32 tlbie flush accelerationAlexander Graf1-0/+4
On Book3s_32 the tlbie instruction flushed effective addresses by the mask 0x0ffff000. This is pretty hard to reflect with a hash that hashes ~0xfff, so to speed up that target we should also keep a special hash around for it. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: RCU'ify the Book3s MMUAlexander Graf1-0/+2
So far we've been running all code without locking of any sort. This wasn't really an issue because I didn't see any parallel access to the shadow MMU code coming. But then I started to implement dirty bitmapping to MOL which has the video code in its own thread, so suddenly we had the dirty bitmap code run in parallel to the shadow mmu code. And with that came trouble. So I went ahead and made the MMU modifying functions as parallelizable as I could think of. I hope I didn't screw up too much RCU logic :-). If you know your way around RCU and locking and what needs to be done when, please take a look at this patch. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Expose magic page support to guestAlexander Graf1-0/+2
Now that we have the shared page in place and the MMU code knows about the magic page, we can expose that capability to the guest! Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Magic Page Book3s supportAlexander Graf1-0/+1
We need to override EA as well as PA lookups for the magic page. When the guest tells us to project it, the magic page overrides any guest mappings. In order to reflect that, we need to hook into all the MMU layers of KVM to force map the magic page if necessary. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: First magic page stepsAlexander Graf1-0/+2
We will be introducing a method to project the shared page in guest context. As soon as we're talking about this coupling, the shared page is colled magic page. This patch introduces simple defines, so the follow-up patches are easier to read. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Make PAM a defineAlexander Graf1-0/+3
On PowerPC it's very normal to not support all of the physical RAM in real mode. To check if we're matching on the shared page or not, we need to know the limits so we can restrain ourselves to that range. So let's make it a define instead of open-coding it. And while at it, let's also increase it. Signed-off-by: Alexander Graf <agraf@suse.de> v2 -> v3: - RMO -> PAM (non-magic page) Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Tell guest about pending interruptsAlexander Graf1-0/+1
When the guest turns on interrupts again, it needs to know if we have an interrupt pending for it. Because if so, it should rather get out of guest context and get the interrupt. So we introduce a new field in the shared page that we use to tell the guest that there's a pending interrupt lying around. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Add PV guest scratch registersAlexander Graf1-0/+3
While running in hooked code we need to store register contents out because we must not clobber any registers. So let's add some fields to the shared page we can just happily write to. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Add PV guest critical sectionsAlexander Graf1-0/+1
When running in hooked code we need a way to disable interrupts without clobbering any interrupts or exiting out to the hypervisor. To achieve this, we have an additional critical field in the shared page. If that field is equal to the r1 register of the guest, it tells the hypervisor that we're in such a critical section and thus may not receive any interrupts. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Implement hypervisor interfaceAlexander Graf2-1/+114
To communicate with KVM directly we need to plumb some sort of interface between the guest and KVM. Usually those interfaces use hypercalls. This hypercall implementation is described in the last patch of the series in a special documentation file. Please read that for further information. This patch implements stubs to handle KVM PPC hypercalls on the host and guest side alike. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Convert SPRG[0-4] to shared pageAlexander Graf2-4/+4
When in kernel mode there are 4 additional registers available that are simple data storage. Instead of exiting to the hypervisor to read and write those, we can just share them with the guest using the page. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Convert SRR0 and SRR1 to shared pageAlexander Graf2-2/+2
The SRR0 and SRR1 registers contain cached values of the PC and MSR respectively. They get written to by the hypervisor when an interrupt occurs or directly by the kernel. They are also used to tell the rfi(d) instruction where to jump to. Because it only gets touched on defined events that, it's very simple to share with the guest. Hypervisor and guest both have full r/w access. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Convert DAR to shared page.Alexander Graf2-1/+1
The DAR register contains the address a data page fault occured at. This register behaves pretty much like a simple data storage register that gets written to on data faults. There is no hypervisor interaction required on read or write. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Convert DSISR to shared pageAlexander Graf2-1/+1
The DSISR register contains information about a data page fault. It is fully read/write from inside the guest context and we don't need to worry about interacting based on writes of this register. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Convert MSR to shared pageAlexander Graf2-1/+1
One of the most obvious registers to share with the guest directly is the MSR. The MSR contains the "interrupts enabled" flag which the guest has to toggle in critical sections. So in order to bring the overhead of interrupt en- and disabling down, let's put msr into the shared page. Keep in mind that even though you can fully read its contents, writing to it doesn't always update all state. There are a few safe fields that don't require hypervisor interaction. See the documentation for a list of MSR bits that are safe to be set from inside the guest. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: PPC: Introduce shared pageAlexander Graf2-0/+7
For transparent variable sharing between the hypervisor and guest, I introduce a shared page. This shared page will contain all the registers the guest can read and write safely without exiting guest context. This patch only implements the stubs required for the basic structure of the shared page. The actual register moving follows. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-21Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpcLinus Torvalds23-58/+218
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (71 commits) powerpc/44x: Update ppc44x_defconfig powerpc/watchdog: Make default timeout for Book-E watchdog a Kconfig option fsl_rio: Add comments for sRIO registers. powerpc/fsl-booke: Add e55xx (64-bit) smp defconfig powerpc/fsl-booke: Add p5020 DS board support powerpc/fsl-booke64: Use TLB CAMs to cover linear mapping on FSL 64-bit chips powerpc/fsl-booke: Add support for FSL Arch v1.0 MMU in setup_page_sizes powerpc/fsl-booke: Add support for FSL 64-bit e5500 core powerpc/85xx: add cache-sram support powerpc/85xx: add ngPIXIS FPGA device tree node to the P1022DS board powerpc: Fix compile error with paca code on ppc64e powerpc/fsl-booke: Add p3041 DS board support oprofile/fsl emb: Don't set MSR[PMM] until after clearing the interrupt. powerpc/fsl-booke: Add PCI device ids for P2040/P3041/P5010/P5020 QoirQ chips powerpc/mpc8xxx_gpio: Add support for 'qoriq-gpio' controllers powerpc/fsl_booke: Add support to boot from core other than 0 powerpc/p1022: Add probing for individual DMA channels powerpc/fsl_soc: Search all global-utilities nodes for rstccr powerpc: Fix invalid page flags in create TLB CAM path for PTE_64BIT powerpc/mpc83xx: Support for MPC8308 P1M board ... Fix up conflict with the generic irq_work changes in arch/powerpc/kernel/time.c
2010-10-21Merge branch 'core-memblock-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds2-7/+12
* 'core-memblock-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (74 commits) x86-64: Only set max_pfn_mapped to 512 MiB if we enter via head_64.S xen: Cope with unmapped pages when initializing kernel pagetable memblock, bootmem: Round pfn properly for memory and reserved regions memblock: Annotate memblock functions with __init_memblock memblock: Allow memblock_init to be called early memblock/arm: Fix memblock_region_is_memory() typo x86, memblock: Remove __memblock_x86_find_in_range_size() memblock: Fix wraparound in find_region() x86-32, memblock: Make add_highpages honor early reserved ranges x86, memblock: Fix crashkernel allocation arm, memblock: Fix the sparsemem build memblock: Fix section mismatch warnings powerpc, memblock: Fix memblock API change fallout memblock, microblaze: Fix memblock API change fallout x86: Remove old bootmem code x86, memblock: Use memblock_memory_size()/memblock_free_memory_size() to get correct dma_reserve x86: Remove not used early_res code x86, memblock: Replace e820_/_early string with memblock_ x86: Use memblock to replace early_res x86, memblock: Use memblock_debug to control debug message print out ... Fix up trivial conflicts in arch/x86/kernel/setup.c and kernel/Makefile
2010-10-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-irqflagsLinus Torvalds2-49/+66
* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-irqflags: Fix IRQ flag handling naming MIPS: Add missing #inclusions of <linux/irq.h> smc91x: Add missing #inclusion of <linux/irq.h> Drop a couple of unnecessary asm/system.h inclusions SH: Add missing consts to sys_execve() declaration Blackfin: Rename IRQ flags handling functions Blackfin: Add missing dep to asm/irqflags.h Blackfin: Rename DES PC2() symbol to avoid collision Blackfin: Split the BF532 BFIN_*_FIO_FLAG() functions to their own header Blackfin: Split PLL code from mach-specific cdef headers
2010-10-21Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds1-4/+0
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (29 commits) sched: Export account_system_vtime() sched: Call tick_check_idle before __irq_enter sched: Remove irq time from available CPU power sched: Do not account irq time to current task x86: Add IRQ_TIME_ACCOUNTING sched: Add IRQ_TIME_ACCOUNTING, finer accounting of irq time sched: Add a PF flag for ksoftirqd identification sched: Consolidate account_system_vtime extern declaration sched: Fix softirq time accounting sched: Drop group_capacity to 1 only if local group has extra capacity sched: Force balancing on newidle balance if local group has capacity sched: Set group_imb only a task can be pulled from the busiest cpu sched: Do not consider SCHED_IDLE tasks to be cache hot sched: Drop all load weight manipulation for RT tasks sched: Create special class for stop/migrate work sched: Unindent labels sched: Comment updates: fix default latency and granularity numbers tracing/sched: Add sched_pi_setprio tracepoint sched: Give CPU bound RT tasks preference sched: Try not to migrate higher priority RT tasks ...
2010-10-18sched: Consolidate account_system_vtime extern declarationVenkatesh Pallipadi1-4/+0
Just a minor cleanup patch that makes things easier to the following patches. No functionality change in this patch. Signed-off-by: Venkatesh Pallipadi <venki@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1286237003-12406-3-git-send-email-venki@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-18irq_work: Add generic hardirq context callbacksPeter Zijlstra1-1/+1
Provide a mechanism that allows running code in IRQ context. It is most useful for NMI code that needs to interact with the rest of the system -- like wakeup a task to drain buffers. Perf currently has such a mechanism, so extract that and provide it as a generic feature, independent of perf so that others may also benefit. The IRQ context callback is generated through self-IPIs where possible, or on architectures like powerpc the decrementer (the built-in timer facility) is set to generate an interrupt immediately. Architectures that don't have anything like this get to do with a callback from the timer tick. These architectures can call irq_work_run() at the tail of any IRQ handlers that might enqueue such work (like the perf IRQ handler) to avoid undue latencies in processing the work. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [ various fixes ] Signed-off-by: Huang Ying <ying.huang@intel.com> LKML-Reference: <1287036094.7768.291.camel@yhuang-dev> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-18Update broken web addresses in arch directory.Justin P. Mattock1-1/+1
The patch below updates broken web addresses in the arch directory. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-10-14powerpc/fsl-booke: Add support for FSL Arch v1.0 MMU in setup_page_sizesKumar Gala1-0/+15
Update setup_page_sizes() to support for a MMU v1.0 FSL style MMU implementation. In such a processor, we don't have TLB0PS or EPTCFG registers (and access to these registers may cause exceptions). We need to parse the older format of TLBnCFG for page size support. Additionaly, assume since we are an FSL implementation that we have 2 TLB arrays and the second array contains the variable size pages. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-10-14powerpc/85xx: add cache-sram supportHarninder Rai1-0/+48
It adds cache-sram support in P1/P2 QorIQ platforms as under: * A small abstraction over powerpc's remote heap allocator * Exports mpc85xx_cache_sram_alloc()/free() APIs * Supports only one contiguous SRAM window * Drivers can do the following in Kconfig to use these APIs "select FSL_85XX_CACHE_SRAM if MPC85xx" * Required SRAM size and the offset where SRAM should be mapped must be provided at kernel command line as : cache-sram-size=<value> cache-sram-offset=<offset> Signed-off-by: Harninder Rai <harninder.rai@freescale.com> Signed-off-by: Vivek Mahajan <vivek.mahajan@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-10-14powerpc: Fix invalid page flags in create TLB CAM path for PTE_64BITPaul Gortmaker1-0/+7
There exists a four line chunk of code, which when configured for 64 bit address space, can incorrectly set certain page flags during the TLB creation. It turns out that this is code which isn't used, but might still serve a purpose. Since it isn't obvious why it exists or why it causes problems, the below description covers both in detail. For powerpc bootstrap, the physical memory (at most 768M), is mapped into the kernel space via the following path: MMU_init() | + adjust_total_lowmem() | + map_mem_in_cams() | + settlbcam(i, virt, phys, cam_sz, PAGE_KERNEL_X, 0); On settlbcam(), the kernel will create TLB entries according to the flag, PAGE_KERNEL_X. settlbcam() { ... TLBCAM[index].MAS1 = MAS1_VALID | MAS1_IPROT | MAS1_TSIZE(tsize) | MAS1_TID(pid); ^ These entries cannot be invalidated by the kernel since MAS1_IPROT is set on TLB property. ... if (flags & _PAGE_USER) { TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR; TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0); } For classic BookE (flags & _PAGE_USER) is 'zero' so it's fine. But on boards like the the Freescale P4080, we want to support 36-bit physical address on it. So the following options may be set: CONFIG_FSL_BOOKE=y CONFIG_PTE_64BIT=y CONFIG_PHYS_64BIT=y As a result, boards like the P4080 will introduce PTE format as Book3E. As per the file: arch/powerpc/include/asm/pgtable-ppc32.h * #elif defined(CONFIG_FSL_BOOKE) && defined(CONFIG_PTE_64BIT) * #include <asm/pte-book3e.h> So PAGE_KERNEL_X is __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX) and the book3E version of _PAGE_KERNEL_RWX is defined with: (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX) Note the _PAGE_BAP_SR, which is also defined in the book3E _PAGE_USER: #define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */ So the possibility exists to wrongly assign the user MAS3_U<RWX> bits to kernel (PAGE_KERNEL_X) address space via the following code fragment: if (flags & _PAGE_USER) { TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR; TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0); } Here is a dump of the TLB info from Simics with the above code present: ------ L2 TLB1 GT SSS UUU V I Row Logical Physical SS TLPID TID WIMGE XWR XWR F P V ----- ----------------- ------------------- -- ----- ----- ----- --- --- - - - 0 c0000000-cfffffff 000000000-00fffffff 00 0 0 M XWR XWR 0 1 1 1 d0000000-dfffffff 010000000-01fffffff 00 0 0 M XWR XWR 0 1 1 2 e0000000-efffffff 020000000-02fffffff 00 0 0 M XWR XWR 0 1 1 Actually this conditional code was used for two legacy functions: 1: support KGDB to set break point. KGDB already dropped this; now uses its core write to set break point. 2: io_block_mapping() to create TLB in segmentation size (not PAGE_SIZE) for device IO space. This use case is also removed from the latest PowerPC kernel. However, there may still be a use case for it in the future, like large user pages, so we can't remove it entirely. As an alternative, we match on all bits of _PAGE_USER instead of just any bits, so the case where just _PAGE_BAP_SR is set can't sneak through. With this done, the TLB appears without U having XWR as below: ------- L2 TLB1 GT SSS UUU V I Row Logical Physical SS TLPID TID WIMGE XWR XWR F P V ----- ----------------- ------------------- -- ----- ----- ----- --- --- - - - 0 c0000000-cfffffff 000000000-00fffffff 00 0 0 M XWR 0 1 1 1 d0000000-dfffffff 010000000-01fffffff 00 0 0 M XWR 0 1 1 2 e0000000-efffffff 020000000-02fffffff 00 0 0 M XWR 0 1 1 Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-10-14powerpc/kexec: make masking/disabling interrupts genericMatthew McClintock1-0/+1
Right now just the kexec crash pathway turns turns off the interrupts. Pull that out and make a generic version for use elsewhere Signed-off-by: Matthew McClintock <msm@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-10-13powerpc/pci: Fix return type of BUID_{HI,LO} macrosNishanth Aravamudan1-2/+2
BUID_HI and BUID_LO are used to pass data to call_rtas, which expects ints or u32s. But the macro doesn't cast the return, so the result is still u64. Use the upper_32_bits and lower_32_bits macros that have been added to kernel.h. Found by getting printf format errors trying to debug print the args, no actual code change for 64 bit kernels where the macros are actually used. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Acked-by: Linas Vepstas <linasvepstas@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-10-13powerpc/pseries: Export rtas_ibm_suspend_me()Nathan Fontenot1-0/+1
Export the rtas_ibm_suspend_me() routine. This is needed to perform partition migration in the kernel. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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