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2014-05-31ARM: EXYNOS: Add 5800 SoC supportArun Kumar K
Exynos5800 is an octa core SoC which is based on the 5420 platform. This patch adds the basic support for it in the mach-exynos. Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: EXYNOS: initial board support for exynos5260 SoCPankaj Dubey
This patch add basic arch side support for exynos5260 SoC. Note that this is required to enable build for clock driver. Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31Merge branch 'v3.16-next/cleanup-samsung' into v3.16-next/platform-exynosKukjin Kim
2014-05-30MAINTAINERS: Add generic PCI host controller driverWill Deacon
Add myself as the maintainer for the generic PCI host controller driver. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Arnd Bergmann <arnd@arndb.de>
2014-05-30PCI: generic: Add generic PCI host controller driverWill Deacon
Add support for a generic PCI host controller, such as a firmware-initialised device with static windows or an emulation by something such as kvmtool. The controller itself has no configuration registers and has its address spaces described entirely by the device-tree (using the bindings from ePAPR). Both CAM and ECAM are supported for Config Space accesses. Add corresponding documentation for the DT binding. [bhelgaas: currently uses the ARM-specific pci_common_init_dev() interface] Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
2014-05-30PCI: imx6: Add support for MSILucas Stach
This patch adds support for Message Signaled Interrupts in the imx6-pcie driver. Signed-off-by: Harro Haan <hrhaan@gmail.com> Signed-off-by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30PCI: designware: Make MSI ISR shared IRQ awareLucas Stach
On i.MX6 the host controller MSI IRQ is shared with PCI legacy INTD. Make sure we don't bail too early from the IRQ handler. The issue is fairly theoretical as it would require a system setup with a PCIe switch where one connected device is using legacy INTD and another one using MSI, but better fix it now. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30PCI: imx6: Remove optional (and unused) IRQsLucas Stach
They are dropped with the new binding. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30PCI: imx6: Drop old IRQ mappingLucas Stach
We don't need this anymore. The IRQs are now properly mapped through the DT. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-30PCI: imx6: Use new clock namesLucas Stach
As defined in the new binding. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Richard Zhu <r65037@freescale.com>
2014-05-31ARM: dts: add pmu sysreg node to exynos3250Chanwoo Choi
This patch add pmusysreg node for Exynos3250 to access PMU (Power Management Unit) register in a centralized way using syscon driver. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31clk: exynos5410: register clocks using common clock frameworkTarek Dakhran
The EXYNOS5410 clocks are statically listed and registered using the Samsung specific common clock helper functions. Signed-off-by: Tarek Dakhran <t.dakhran@samsung.com> Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: correct the usb phy node in exynos5800-peach-piArun Kumar K
The vbus-supply property is wrongly updated in the usbdrd node instead of the usbdrd_phy node. This patch fixes the same. Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: correct the usb phy node in exynos5420-peach-pitArun Kumar K
The vbus-supply property is wrongly updated in the usbdrd node instead of the usbdrd_phy node. This patch fixes the same. Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add dts files for exynos5410 and exynos5410-smdk5410Tarek Dakhran
Add initial device tree nodes for EXYNOS5410 SoC and SMDK5410 board. Signed-off-by: Tarek Dakhran <t.dakhran@samsung.com> Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add dts files for exynos3250 SoCTomasz Figa
This patch adds new exynos3250.dtsi to support Exynos3250 SoC based on Cortex-A7 dual core and includes following dt nodes: - GIC interrupt controller - Pinctrl to control GPIOs - Clock controller - CPU information (Cortex-A7 dual core) - UART to support serial port - MCT (Multi Core Timer) - ADC (Analog Digital Converter) - I2C/SPI bus - Power domain - PMU (Performance Monitoring Unit) - MSHC (Mobile Storage Host Controller) - PWM (Pluse Width Modulation) - AMBA bus - sysram node for SYSRAM memory mapping Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: devicetree@vger.kernel.org Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add mfc node for exynos5800Arun Kumar K
Adds the mfc node to exynos5800 which uses MFCv8. Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add Vbus regulator for USB 3.0 on exynos5800-peach-piVivek Gautam
Add required fixed-regulator for VBUS supply for USB 3.0 controller phy. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: enable fimd for exynos5800-peach-piRahul Sharma
Enable FIMD for peach-pi board. Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Reviewed-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: enable display controller for exynos5800-peach-piRahul Sharma
Enable display controller with timing information for 1080p panel in Exynos5800 peach-pi board. Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Reviewed-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: enable hdmi for exynos5800-peach-piRahul Sharma
Enable hdmi for peach-pi board. Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Acked-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add dts file for exynos5800-peach-pi boardArun Kumar K
Adds support for google peach-pi board having the Exynos5800 SoC. Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Signed-off-by: Doug Anderson <dianders@chromium.org> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add dts file for exynos5800 SoCArun Kumar K
Most of the nodes of exynos5420 remains same for exynos5800. So the exynos5420.dtsi is included in exynos5800 and the changed node properties will be overriden. Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add dts file for exynos5260-xyref5260 boardRahul Sharma
The patch adds the dts file for xyref5260 board which is based on exynos5260 SoC. Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: add dts files for exynos5260 SoCRahul Sharma
The patch adds the dts files for exynos5260. Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: update watchdog node name in exynos5440Sachin Kamat
Made it as per DT node naming convention <name@reg_addr>. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Reviewed-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: use key code macros on Origen and Arndale boardsSachin Kamat
Key code macros improve readability on exnos4210-origen, exynos4412-origen and exynos5250-arndale boards. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> [kgene.kim@samsung.com: squashed similar two patches] Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-31ARM: dts: enable RTC and WDT nodes on Origen boardsSachin Kamat
Enabled RTC and WDT nodes on exynos4210-origen and exynos4412-origen boards. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> [kgene.kim@samsung.com: squashed similar two patches] Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-30i82875p_edac: Assign PCI resources before adding deviceYinghai Lu
Assign PCI resources before pci_bus_add_device(). The resources must be assigned before a driver can claim the device. [bhelgaas: changelog] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-30Merge branch 'for-linus-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs dcache livelock fix from Al Viro: "Fixes for livelocks in shrink_dentry_list() introduced by fixes to shrink list corruption; the root cause was that trylock of parent's ->d_lock could be disrupted by d_walk() happening on other CPUs, resulting in shrink_dentry_list() making no progress *and* the same d_walk() being called again and again for as long as shrink_dentry_list() doesn't get past that mess. The solution is to have shrink_dentry_list() treat that trylock failure not as 'try to do the same thing again', but 'lock them in the right order'" * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: dentry_kill() doesn't need the second argument now dealing with the rest of shrink_dentry_list() livelock shrink_dentry_list(): take parent's ->d_lock earlier expand dentry_kill(dentry, 0) in shrink_dentry_list() split dentry_kill() lift the "already marked killed" case into shrink_dentry_list()
2014-05-30ARM/PCI: Call pcie_bus_configure_settings() to set MPSMurali Karicheri
Call pcie_bus_configure_settings() on ARM, like for other platforms. pcie_bus_configure_settings() makes sure the MPS across the bus is uniform and provides the ability to tune the MRSS and MPS to higher performance values. This is particularly important for embedded where there is no firmware to program these PCIe settings for the OS. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: Russell King <linux@arm.linux.org.uk> CC: Arnd Bergmann <arnd@arndb.de> CC: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> CC: Santosh Shilimkar <santosh.shilimkar@ti.com>
2014-05-30blk-mq: blk_mq_unregister_hctx() can be staticFengguang Wu
CC: Jens Axboe <axboe@kernel.dk> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-30Merge tag 'renesas-fixes-for-v3.16' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/fixes-non-critical Merge "Renesas ARM Based SoC Fixes for v3.16" from Simon Horman: This corrects a bug that will be introduced in v3.15. The bug causes audio playback to fail on the Armadillo800 EVA board. * tag 'renesas-fixes-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: ARM: shmobile: armadillo800eva: fixup HDMI sound flags setting Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-30PCI: imx6: Fix imx6_add_pcie_port() section mismatch warningSachin Kamat
imx6_add_pcie_port() is called only from from imx6_pcie_probe() which is annotated with __init. Thus it makes sense to annotate imx6_add_pcie_port() with __init to avoid section mismatch warnings. [bhelgaas: changelog] Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Sean Cross <xobs@kosagi.com>
2014-05-30PCI: Make pci_bus_add_device() voidYijing Wang
pci_bus_add_device() always returns 0, so there's no point in returning anything at all. Make it a void function and remove the tests of the return value from the callers. [bhelgaas: changelog, remove unused "err" from i82875p_setup_overfl_dev()] Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-30dentry_kill() doesn't need the second argument nowAl Viro
it's 1 in the only remaining caller. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-30dealing with the rest of shrink_dentry_list() livelockAl Viro
We have the same problem with ->d_lock order in the inner loop, where we are dropping references to ancestors. Same solution, basically - instead of using dentry_kill() we use lock_parent() (introduced in the previous commit) to get that lock in a safe way, recheck ->d_count (in case if lock_parent() has ended up dropping and retaking ->d_lock and somebody managed to grab a reference during that window), trylock the inode->i_lock and use __dentry_kill() to do the rest. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-30shrink_dentry_list(): take parent's ->d_lock earlierAl Viro
The cause of livelocks there is that we are taking ->d_lock on dentry and its parent in the wrong order, forcing us to use trylock on the parent's one. d_walk() takes them in the right order, and unfortunately it's not hard to create a situation when shrink_dentry_list() can't make progress since trylock keeps failing, and shrink_dcache_parent() or check_submounts_and_drop() keeps calling d_walk() disrupting the very shrink_dentry_list() it's waiting for. Solution is straightforward - if that trylock fails, let's unlock the dentry itself and take locks in the right order. We need to stabilize ->d_parent without holding ->d_lock, but that's doable using RCU. And we'd better do that in the very beginning of the loop in shrink_dentry_list(), since the checks on refcount, etc. would need to be redone anyway. That deals with a half of the problem - killing dentries on the shrink list itself. Another one (dropping their parents) is in the next commit. locking parent is interesting - it would be easy to do rcu_read_lock(), lock whatever we think is a parent, lock dentry itself and check if the parent is still the right one. Except that we need to check that *before* locking the dentry, or we are risking taking ->d_lock out of order. Fortunately, once the D1 is locked, we can check if D2->d_parent is equal to D1 without the need to lock D2; D2->d_parent can start or stop pointing to D1 only under D1->d_lock, so taking D1->d_lock is enough. In other words, the right solution is rcu_read_lock/lock what looks like parent right now/check if it's still our parent/rcu_read_unlock/lock the child. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-30blk-mq: make the sysfs mq/ layout reflect current mappingsJens Axboe
Currently blk-mq registers all the hardware queues in sysfs, regardless of whether it uses them (e.g. they have CPU mappings) or not. The unused hardware queues lack the cpux/ directories, and the other sysfs entries (like active, pending, etc) are all zeroes. Change this so that sysfs correctly reflects the current mappings of the hardware queues. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-30block: virtio_blk: don't hold spin lock during world switchMing Lei
Firstly, it isn't necessary to hold lock of vblk->vq_lock when notifying hypervisor about queued I/O. Secondly, virtqueue_notify() will cause world switch and it may take long time on some hypervisors(such as, qemu-arm), so it isn't good to hold the lock and block other vCPUs. On arm64 quad core VM(qemu-kvm), the patch can increase I/O performance a lot with VIRTIO_RING_F_EVENT_IDX enabled: - without the patch: 14K IOPS - with the patch: 34K IOPS fio script: [global] direct=1 bsrange=4k-4k timeout=10 numjobs=4 ioengine=libaio iodepth=64 filename=/dev/vdc group_reporting=1 [f1] rw=randread Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Ming Lei <ming.lei@canonical.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Cc: stable@kernel.org # 3.13+ Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-30Merge branch 'for-3.16/core' into for-3.16/driversJens Axboe
Pulled in for the blk_mq_tag_to_rq() change, which impacts mtip32xx. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-30blk-mq: blk_mq_tag_to_rq should handle flush requestShaohua Li
flush request is special, which borrows the tag from the parent request. Hence blk_mq_tag_to_rq needs special handling to return the flush request from the tag. Signed-off-by: Shaohua Li <shli@fusionio.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-30Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into ↵Paolo Bonzini
kvm-next Patch queue for ppc - 2014-05-30 In this round we have a few nice gems. PR KVM gains initial POWER8 support as well as LE host awareness, ihe e500 targets can now properly run u-boot, LE guests now work with PR KVM including KVM hypercalls and HV KVM guests can now use huge pages. On top of this there are some bug fixes. Conflicts: include/uapi/linux/kvm.h
2014-05-30KVM: PPC: Book3S PR: Rework SLB switching codeAlexander Graf
On LPAR guest systems Linux enables the shadow SLB to indicate to the hypervisor a number of SLB entries that always have to be available. Today we go through this shadow SLB and disable all ESID's valid bits. However, pHyp doesn't like this approach very much and honors us with fancy machine checks. Fortunately the shadow SLB descriptor also has an entry that indicates the number of valid entries following. During the lifetime of a guest we can just swap that value to 0 and don't have to worry about the SLB restoration magic. While we're touching the code, let's also make it more readable (get rid of rldicl), allow it to deal with a dynamic number of bolted SLB entries and only do shadow SLB swizzling on LPAR systems. Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30KVM: PPC: Book3S PR: Use SLB entry 0Alexander Graf
We didn't make use of SLB entry 0 because ... of no good reason. SLB entry 0 will always be used by the Linux linear SLB entry, so the fact that slbia does not invalidate it doesn't matter as we overwrite SLB 0 on exit anyway. Just enable use of SLB entry 0 for our shadow SLB code. Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30KVM: PPC: Book3S HV: Fix machine check delivery to guestPaul Mackerras
The code that delivered a machine check to the guest after handling it in real mode failed to load up r11 before calling kvmppc_msr_interrupt, which needs the old MSR value in r11 so it can see the transactional state there. This adds the missing load. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30KVM: PPC: Book3S HV: Work around POWER8 performance monitor bugsPaul Mackerras
This adds workarounds for two hardware bugs in the POWER8 performance monitor unit (PMU), both related to interrupt generation. The effect of these bugs is that PMU interrupts can get lost, leading to tools such as perf reporting fewer counts and samples than they should. The first bug relates to the PMAO (perf. mon. alert occurred) bit in MMCR0; setting it should cause an interrupt, but doesn't. The other bug relates to the PMAE (perf. mon. alert enable) bit in MMCR0. Setting PMAE when a counter is negative and counter negative conditions are enabled to cause alerts should cause an alert, but doesn't. The workaround for the first bug is to create conditions where a counter will overflow, whenever we are about to restore a MMCR0 value that has PMAO set (and PMAO_SYNC clear). The workaround for the second bug is to freeze all counters using MMCR2 before reading MMCR0. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30KVM: PPC: Book3S HV: Make sure we don't miss dirty pagesPaul Mackerras
Current, when testing whether a page is dirty (when constructing the bitmap for the KVM_GET_DIRTY_LOG ioctl), we test the C (changed) bit in the HPT entries mapping the page, and if it is 0, we consider the page to be clean. However, the Power ISA doesn't require processors to set the C bit to 1 immediately when writing to a page, and in fact allows them to delay the writeback of the C bit until they receive a TLB invalidation for the page. Thus it is possible that the page could be dirty and we miss it. Now, if there are vcpus running, this is not serious since the collection of the dirty log is racy already - some vcpu could dirty the page just after we check it. But if there are no vcpus running we should return definitive results, in case we are in the final phase of migrating the guest. Also, if the permission bits in the HPTE don't allow writing, then we know that no CPU can set C. If the HPTE was previously writable and the page was modified, any C bit writeback would have been flushed out by the tlbie that we did when changing the HPTE to read-only. Otherwise we need to do a TLB invalidation even if the C bit is 0, and then check the C bit. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30KVM: PPC: Book3S HV: Fix dirty map for hugepagesAlexey Kardashevskiy
The dirty map that we construct for the KVM_GET_DIRTY_LOG ioctl has one bit per system page (4K/64K). Currently, we only set one bit in the map for each HPT entry with the Change bit set, even if the HPT is for a large page (e.g., 16MB). Userspace then considers only the first system page dirty, though in fact the guest may have modified anywhere in the large page. To fix this, we make kvm_test_clear_dirty() return the actual number of pages that are dirty (and rename it to kvm_test_clear_dirty_npages() to emphasize that that's what it returns). In kvmppc_hv_get_dirty_log() we then set that many bits in the dirty map. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-05-30KVM: PPC: Book3S HV: Put huge-page HPTEs in rmap chain for base addressPaul Mackerras
Currently, when a huge page is faulted in for a guest, we select the rmap chain to insert the HPTE into based on the guest physical address that the guest tried to access. Since there is an rmap chain for each system page, there are many rmap chains for the area covered by a huge page (e.g. 256 for 16MB pages when PAGE_SIZE = 64kB), and the huge-page HPTE could end up in any one of them. For consistency, and to make the huge-page HPTEs easier to find, we now put huge-page HPTEs in the rmap chain corresponding to the base address of the huge page. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
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