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2014-05-22powerpc/fsl: Updated device trees for platforms with corenet version 2Diana Craciun
Updated the device trees according to the corenet-cf binding definition. Signed-off-by: Diana Craciun <Diana.Craciun@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-22powerpc: Fix unused variable warning for epapr_has_idleScott Wood
This warning can be seen in allyesconfig, and was introduced by commit f9eb581c63b2acce827570e105205c0789360650 "powerpc: fix build of epapr_paravirt on 64-bit book3s". Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-22powerpc: fix build of epapr_paravirt on 64-bit book3sScott Wood
This fixes an allyesconfig build break introduced by commit 7762b1ed7aaee223230793fcee80672e2e3aa7a8 "powerpc: move epapr paravirt init of power_save to an initcall". Signed-off-by: Scott Wood <scottwood@freescale.com> Cc: Stuart Yoder <stuart.yoder@freescale.com>
2014-05-22powerpc: move epapr paravirt init of power_save to an initcallStuart Yoder
some restructuring of epapr paravirt init resulted in ppc_md.power_save being set, and then overwritten to NULL during machine_init. This patch splits the initialization of ppc_md.power_save out into a postcore init call. Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-22powerpc/85xx: Add OCA4080 board supportMartijn de Gouw
OCA4080 overview: - 1.466 GHz Freescale QorIQ P4080E Processor - 4Gbyte DDR3 on board - 8Mbyte Nor flash - Serial RapidIO 1.2 - 1 x 10/100/1000 BASE-T front ethernet - 1 x 1000 BASE-BX ethernet on AMC connector Signed-off-by: Martijn de Gouw <martijn.de.gouw@prodrive.nl> [scottwood@freescale.com: minor conflict-related changes] Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-22powerpc/mpc85xx: add support for Keymile's kmcoge4 boardValentin Longchamp
This patch introduces the support for Keymile's kmcoge4 board which is the internal reference design for boards based on Freescale's P2040/P2041 SoCs. This internal reference design is named kmp204x. The peripherals used on this board are: - SPI NOR Flash as bootloader medium - NAND Flash with a ubi partition - 2 PCIe busses (hosts 1 and 3) - 3 FMAN Ethernet devices (FMAN1 DTSEC1/2/5) - 4 Local Bus windows, with one dedicated to the QRIO reset/power mgmt CPLD - 2 I2C busses - last but not least, the mandatory serial port The patch also adds a defconfig file for this reference design that is necessary because of the lowmem option that must be set higher due to the number of PCIe devices with big ioremapped mem ranges on the boad. Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-22fsl/pci: fix RC cannot detect PME message comingWang Dongsheng
PCI controller disable PME message report feature, that shouldn't have happened. Fix it and enable PME message report feature. Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-22powerpc/rmu: Fix the error memory free parametersLiu Gang
There are error parameters should be corrected when calling dma_free_coherent to free rmu rx-ring buffers in fsl_open_inb_mbox() function. Signed-off-by: Liu Gang <Gang.Liu@freescale.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-22powerpc/fsl-booke64: Set vmemmap_psize to 4KScott Wood
The only way Freescale booke chips support mappings larger than 4K is via TLB1. The only way we support (direct) TLB1 entries is via hugetlb, which is not what map_kernel_page() does when given a large page size. Without this, a kernel with CONFIG_SPARSEMEM_VMEMMAP enabled crashes on boot with messages such as: PID hash table entries: 4096 (order: 3, 32768 bytes) Sorting __ex_table... BUG: Bad page state in process swapper pfn:00a2f page:8000040000023a48 count:0 mapcount:0 mapping:0000040000ffce48 index:0x40000ffbe50 page flags: 0x40000ffda40(active|arch_1|private|private_2|head|tail|swapcache|mappedtodisk|reclaim|swapbacked|unevictable|mlocked) page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set bad because of flags: page flags: 0x311840(active|private|private_2|swapcache|unevictable|mlocked) Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 3.15.0-rc1-00003-g7fa250c #299 Call Trace: [c00000000098ba20] [c000000000008b3c] .show_stack+0x7c/0x1cc (unreliable) [c00000000098baf0] [c00000000060aa50] .dump_stack+0x88/0xb4 [c00000000098bb70] [c0000000000c0468] .bad_page+0x144/0x1a0 [c00000000098bc10] [c0000000000c0628] .free_pages_prepare+0x164/0x17c [c00000000098bcc0] [c0000000000c24cc] .free_hot_cold_page+0x48/0x214 [c00000000098bd60] [c00000000086c318] .free_all_bootmem+0x1fc/0x354 [c00000000098be70] [c00000000085da84] .mem_init+0xac/0xdc [c00000000098bef0] [c0000000008547b0] .start_kernel+0x21c/0x4d4 [c00000000098bf90] [c000000000000448] .start_here_common+0x20/0x58 Signed-off-by: Scott Wood <scottwood@freescale.com>
2014-05-23MIPS: Fix branch emulation of branch likely instructions.Ralf Baechle
Two issues: o For beql_op, beql_op, bne_op, bnel_op, blez_op, blezl_op, bgtz_op and bgtzl_op the wrong field was being checked for the instruction opcode. o For blez_op / blezl_op and bgtz_op / bgtzl_op the test was testing for the wrong opcode. This bug got introduced by d8d4e3ae0b5c179c0bfd3f0af5b352d13bea9cfa [MIPS Kprobes: Refactor branch emulation]. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Acked-by: Victor Kamensky <kamensky@cisco.com>
2014-05-22ARM: dts: msm: Add SDHC controller nodes for MSM8974 and DB8074 boardGeorgi Djakov
Add support for the 2 SDHC controllers on the DB8074 board. The first controller (at 0xf9824900) is connected to an on board soldered eMMC. The second controller (at 0xf98a4900) is connected to a uSD card slot. Signed-off-by: Georgi Djakov <gdjakov@mm-sol.com> Signed-off-by: Kumar Gala <galak@codeaurora.org>
2014-05-22ARM: socfpga: dts: add watchdog0+1Steffen Trumtrar
The SoCFPGA has two watchdog timers. Add them to the dtsi. Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> [dinh: modified patch to have correct irq flag] Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
2014-05-22ARM: dts: socfpga: add gpio piecesSebastian Andrzej Siewior
The cycloneV has three gpio controllers, each one with 29 gpios. This patch adds the three controller with the gpio driver which is now sitting the gpio tree. Cc: devicetree@vger.kernel.org Acked-by: Alan Tull <atull@altera.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
2014-05-22powerpc/fsl: fsl_soc: remove 'fixed-link' parsing codeFlorian Fainelli
Parsing and registration of fixed PHY devices was needed with the use of of_phy_connect_fixed_link() because this function was using the designated PHY address identifier (first cell of the property) as the address to bind the PHY on the emulated bus. Since commit 3be2a49e5c08d268f8af0dd4fe89a24ea8cdc339 ("of: provide a binding for fixed link PHYs") a new pair of functions has been introduced which allows for dynamic address allocation of these fixed PHY devices, but also parses the old 'fixed-link' 5-digit property. Registration of fixed PHY early in platform code was needed because we could not issue a fixed MDIO bus re-scan within network drivers. The fixed PHYs had to be registered before the network drivers would call of_phy_connect_fixed_link(). All of these caveats are solved now, such that we can safely remove of_add_fixed_phys() now. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-23ARM: dts: enable usb nodes for exynos4412-trats2Chanho Park
This patch enables exynos_usbphy and hsotg device nodes. Cc: Tomasz Figa <t.figa@samsung.com> Cc: Kamil Debski <k.debski@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add hsotg device node for exynos4Chanho Park
This patch adds a hsotg node for exynos4 USB2.0 device controller. Cc: Tomasz Figa <t.figa@samsung.com> Cc: Kamil Debski <k.debski@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add exynos_usbphy node for exynos4Chanho Park
This patch enables a exynos_usbphy node for exynos4 SoCs. A exynos4x12 usb phy node is almost same with 4210's one except compatible string and pmu syscon. Cc: Tomasz Figa <t.figa@samsung.com> Cc: Kamil Debski <k.debski@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add PMU syscon node for exynos4Chanho Park
This patch adds a PMU(Power Management Unit) syscon node. This should be required for USB Phy syscon regmap I/F. Cc: Kamil Debski <k.debski@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add pmu syscon handle to exynos5420 hdmiRahul Sharma
Add PMU syscon handle to HDMI dt node for controlling PHY Enable/Disable bit. Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add pmu syscon handle to exynos5250 hdmiRahul Sharma
Add PMU syscon handle to HDMI dt node for controlling PHY Enable/Disable bit. Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: replace number by macro in clock binding for exynos5420Beomho Seo
sss module device node missed clock macro. This patch replace magic number with macro in clock binding for exynos5420. Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: replace number by macro in clock binding for exynos5250Beomho Seo
Phy and sss module device node missed clock macro. This patch replace magic number with macros in clock binding for exynos5250. Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: replace number by macro in clock binding for exynos4Beomho Seo
This patch replaces magic number of MIPI DSI Master node with macros in clock binding for exynos4 Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add external sd card node for exynos4210-universal_c210Marek Szyprowski
This patch enables support external SD card slot. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add multimedia nodes for exynos4210-universal_c210Marek Szyprowski
This patch enables support for multimedia blocks - fimc in mem2mem mode, no camera sensors support yet. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: enable USB functionality for exynos4210-universal_c210Marek Szyprowski
This patch adds device tree nodes necessary to enable USB support on universalc210 board, this includes UDC controller (USB gadget) as well as EHCI and OHCI host ports. LDO3 and LDO8 regulators are switched to always on mode until EHCI and OHCI drivers will support them correctly. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: Enable USB gadget functionality for exynos4210-tratsTomasz Figa
This patch adds device tree nodes necessary to enable USB gadget functionality on Exynos4210-based Trats board. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: Add audio subsystem nodes to exynos4.dtsiSylwester Nawrocki
This patch adds the audio subsystem clock controller and the I2S IP block nodes for Exynos4 SoC series. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: fixed gpio key node for exynos4412-trats2Beomho Seo
This patch fixed gpio key device node. First, fix incorrect gpio property. And then, add ok-key node where locate bottom center. I have tested on exynos4412-trats2 board. Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-23ARM: dts: add cm36651 light/proximity sensor node for exynos4412-trats2Beomho Seo
Exynos4412-trats2 board have light/proximity sensor. This patch add cm36651 light/ proximity sensor node for exynos4412. cm36651 is required properties as below. - Use i2c-gpio for cm36651 sensor. - Use fixed regulator for the IR LED. It is a part of the cm36651 for proximity detection. - cm36651 is i2c device driver so need to use i2c-gpio driver. Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-05-22ARM: dts: MSM8974: Add pinctrl nodeIvan T. Ivanov
Add the pin control node and pin definitions of SPI8. Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Kumar Gala <galak@codeaurora.org>
2014-05-22s390/pci: use pdev->dev.groups for attribute creationSebastian Ott
Let the driver core handle attribute creation by putting all s390 specific pci attributes in an attribute group which is referenced by pdev->dev.groups in pcibios_add_device. Link: https://lkml.kernel.org/r/alpine.LFD.2.11.1404141101500.1529@denkbrett Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-05-22ARM: qcom: Select PINCTRL by default for ARCH_QCOMAndy Gross
Add missing PINCTRL selection. This enables selection of pinctrollers for Qualcomm processors. Signed-off-by: Andy Gross <agross@codeaurora.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Kumar Gala <galak@codeaurora.org>
2014-05-22ARM: debug: qcom: make UART address selection configuration optionIvan T. Ivanov
Separate Qualcomm low-level debugging UART to two options. DEBUG_MSM_UART is used in earlier non-multi platform arches, like MSM7X00A, QSD8X50 and MSM7X30. DEBUG_QCOM_UARTDM is used in multi-plafrom arches and have embedded data mover. Make DEBUG_UART_PHYS and DEBUG_UART_BASE user adjustable by Kconfig menu. Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Kumar Gala <galak@codeaurora.org>
2014-05-22ARM: qcom: Enable ARM_AMBA option for Qualcomm SOCs.Srinivas Kandagatla
As some of the IPs on Qualcomm SOCs are based on ARM PrimeCell IPs. For example SDCC controller is PrimeCell MCI pl180. Adding this option will give flexibility to reuse the existing drivers as it is without major modifications. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Kumar Gala <galak@codeaurora.org>
2014-05-22ARM: at91: sam9260: fix compilation issuesAlexandre Belloni
Use the hexadecimal values for the triggers to match what is done for the device tree. This also fixes compilation issues as the defines have been moved elsewhere. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: config: Update msm_defconfigStephen Boyd
Now that DT based platforms are split out of mach-msm into mach-qcom, put back a non-DT based SoC into the msm_defconfig and stop selecting unsupported drivers. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: David Brown <davidb@codeaurora.org> Signed-off-by: Kumar Gala <galak@codeaurora.org>
2014-05-22ARM: at91: move sam9n12 SoC to the CCFBoris BREZILLON
This patch removes the selection of AT91_USE_OLD_CLK when selecting sam9n12 SoC support. This will automatically enable COMMON_CLK_AT91 option and add support for at91 common clk implementation. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Tested-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: at91/dt: define sam9n12ek crystal frequenciesBoris BREZILLON
Define sam9n12ek's main and slow crystal frequencies. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Tested-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: at91/dt: define sam9n12 clocksBoris BREZILLON
Define sam9n12 clocks and make use of them in peripheral definitions. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Tested-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: at91: prepare common clk transition for sam9n12 SoCBoris BREZILLON
This patch encloses sam9n12 old clk registration in "#if defined(CONFIG_OLD_CLK_AT91) #endif" sections. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Tested-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: at91: move sam9x5 SoCs to the CCFBoris BREZILLON
This patch removes the selection of AT91_USE_OLD_CLK when selecting sam9x5 SoCs support. This will automatically enable COMMON_CLK_AT91 option and add support for at91 common clk implementation. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: at91/dt: define sam9x5ek's crystal frequenciesBoris BREZILLON
Define sam9x5ek's main and slow crystal frequencies. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: at91/dt: define sam9x5 clocksBoris BREZILLON
Define sam9x5 clocks in sam9x5 dt files and make use of them in peripheral definitions. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22ARM: at91: prepare common clk transition for sam9x5 SoCsBoris BREZILLON
This patch encloses sam9x5 old clk registration in "#if defined(CONFIG_OLD_CLK_AT91) #endif" sections. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-05-22Merge branch 'at91-3.16-cleanup' into at91-3.16-dt3Nicolas Ferre
2014-05-22KVM: vmx: DR7 masking on task switch emulation is wrongNadav Amit
The DR7 masking which is done on task switch emulation should be in hex format (clearing the local breakpoints enable bits 0,2,4 and 6). Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-22KVM: x86: get CPL from SS.DPLPaolo Bonzini
CS.RPL is not equal to the CPL in the few instructions between setting CR0.PE and reloading CS. And CS.DPL is also not equal to the CPL for conforming code segments. However, SS.DPL *is* always equal to the CPL except for the weird case of SYSRET on AMD processors, which sets SS.DPL=SS.RPL from the value in the STAR MSR, but force CPL=3 (Intel instead forces SS.DPL=SS.RPL=CPL=3). So this patch: - modifies SVM to update the CPL from SS.DPL rather than CS.RPL; the above case with SYSRET is not broken further, and the way to fix it would be to pass the CPL to userspace and back - modifies VMX to always return the CPL from SS.DPL (except forcing it to 0 if we are emulating real mode via vm86 mode; in vm86 mode all DPLs have to be 3, but real mode does allow privileged instructions). It also removes the CPL cache, which becomes a duplicate of the SS access rights cache. This fixes doing KVM_IOCTL_SET_SREGS exactly after setting CR0.PE=1 but before CS has been reloaded. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-22x86: fix page fault tracing when KVM guest support enabledDave Hansen
I noticed on some of my systems that page fault tracing doesn't work: cd /sys/kernel/debug/tracing echo 1 > events/exceptions/enable cat trace; # nothing shows up I eventually traced it down to CONFIG_KVM_GUEST. At least in a KVM VM, enabling that option breaks page fault tracing, and disabling fixes it. I tried on some old kernels and this does not appear to be a regression: it never worked. There are two page-fault entry functions today. One when tracing is on and another when it is off. The KVM code calls do_page_fault() directly instead of calling the traced version: > dotraplinkage void __kprobes > do_async_page_fault(struct pt_regs *regs, unsigned long > error_code) > { > enum ctx_state prev_state; > > switch (kvm_read_and_reset_pf_reason()) { > default: > do_page_fault(regs, error_code); > break; > case KVM_PV_REASON_PAGE_NOT_PRESENT: I'm also having problems with the page fault tracing on bare metal (same symptom of no trace output). I'm unsure if it's related. Steven had an alternative to this which has zero overhead when tracing is off where this includes the standard noops even when tracing is disabled. I'm unconvinced that the extra complexity of his apporach: http://lkml.kernel.org/r/20140508194508.561ed220@gandalf.local.home is worth it, expecially considering that the KVM code is already making page fault entry slower here. This solution is dirt-simple. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org Cc: Peter Zijlstra <peterz@infradead.org> Cc: Gleb Natapov <gleb@redhat.com> Cc: kvm@vger.kernel.org Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-22KVM: x86: check CS.DPL against RPL during task switchPaolo Bonzini
Table 7-1 of the SDM mentions a check that the code segment's DPL must match the selector's RPL. This was not done by KVM, fix it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>