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* Merge tag 'spdx-5.3-rc2' of ↵Linus Torvalds2019-07-2832-32/+32
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx Pull SPDX fixes from Greg KH: "Here are some small SPDX fixes for 5.3-rc2 for things that came in during the 5.3-rc1 merge window that we previously missed. Only three small patches here: - two uapi patches to resolve some SPDX tags that were not correct - fix an invalid SPDX tag in the iomap Makefile file All have been properly reviewed on the public mailing lists" * tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx: iomap: fix Invalid License ID treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers
| * treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headersMasahiro Yamada2019-07-2532-32/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | UAPI headers licensed under GPL are supposed to have exception "WITH Linux-syscall-note" so that they can be included into non-GPL user space application code. The exception note is missing in some UAPI headers. Some of them slipped in by the treewide conversion commit b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to files with no license"). Just run: $ git show --oneline b24413180f56 -- arch/x86/include/uapi/asm/ I believe they are not intentional, and should be fixed too. This patch was generated by the following script: git grep -l --not -e Linux-syscall-note --and -e SPDX-License-Identifier \ -- :arch/*/include/uapi/asm/*.h :include/uapi/ :^*/Kbuild | while read file do sed -i -e '/[[:space:]]OR[[:space:]]/s/\(GPL-[^[:space:]]*\)/(\1 WITH Linux-syscall-note)/g' \ -e '/[[:space:]]or[[:space:]]/s/\(GPL-[^[:space:]]*\)/(\1 WITH Linux-syscall-note)/g' \ -e '/[[:space:]]OR[[:space:]]/!{/[[:space:]]or[[:space:]]/!s/\(GPL-[^[:space:]]*\)/\1 WITH Linux-syscall-note/g}' $file done After this patch is applied, there are 5 UAPI headers that do not contain "WITH Linux-syscall-note". They are kept untouched since this exception applies only to GPL variants. $ git grep --not -e Linux-syscall-note --and -e SPDX-License-Identifier \ -- :arch/*/include/uapi/asm/*.h :include/uapi/ :^*/Kbuild include/uapi/drm/panfrost_drm.h:/* SPDX-License-Identifier: MIT */ include/uapi/linux/batman_adv.h:/* SPDX-License-Identifier: MIT */ include/uapi/linux/qemu_fw_cfg.h:/* SPDX-License-Identifier: BSD-3-Clause */ include/uapi/linux/vbox_err.h:/* SPDX-License-Identifier: MIT */ include/uapi/linux/virtio_iommu.h:/* SPDX-License-Identifier: BSD-3-Clause */ Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | Merge tag 'armsoc-fixes' of ↵Linus Torvalds2019-07-2831-1886/+33
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC fixes from Olof Johansson: "Here's the first batch of fixes for this release cycle. Main diffstat here is the re-deletion of netx. I messed up and most likely didn't remove the files from the index when I test-merged this and saw conflicts, and from there on out 'git rerere' remembered the mistake and I missed checking it. Here it's done again as expected. Besides that: - A defconfig refresh + enabling of new drivers for u8500 - i.MX fixlets for i2c/SAI/pinmux - sleep.S build fix for Davinci - Broadcom devicetree build/warning fix" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: defconfig: u8500: Add new drivers ARM: defconfig: u8500: Refresh defconfig ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-mux ARM: davinci: fix sleep.S build error on ARMv4 arm64: dts: imx8mq: fix SAI compatible arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1 ARM: dts: imx6ul: fix clock frequency property name of I2C buses ARM: Delete netx a second time ARM: dts: imx7ulp: Fix usb-phy unit address format
| * \ Merge tag 'imx-fixes-5.3' of ↵Olof Johansson2019-07-238-11/+10
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/fixes i.MX fixes for 5.3: - Fix i.MX8MM SAI3 RXC/TXFS pinmux configuration. - Fix i.MX7ULP usb-phy unit address to drop extra '0x' notation. - Fix typo of clock frequency property name in a few i.MX6UL board I2C buses. - Drop "fsl,imx6sx-sai" from i.MX8M SAI device, as it's not compatible with i.MX6SX SAI. * tag 'imx-fixes-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: arm64: dts: imx8mq: fix SAI compatible arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1 ARM: dts: imx6ul: fix clock frequency property name of I2C buses ARM: dts: imx7ulp: Fix usb-phy unit address format Link: https://lore.kernel.org/r/20190723090827.GU15632@dragon Signed-off-by: Olof Johansson <olof@lixom.net>
| | * | arm64: dts: imx8mq: fix SAI compatibleLucas Stach2019-07-231-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The i.MX8M SAI block is not compatible with the i.MX6SX one, as the register layout has changed due to two version registers being added at the beginning of the address map. Remove the bogus compatible. Fixes: 8c61538dc945 ("arm64: dts: imx8mq: Add SAI2 node") Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
| | * | arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1Anson Huang2019-07-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to i.MX8MM reference manual Rev.1, 03/2019: SAI3_RXC pin's mux option #1 should be GPT1_CLK, NOT GPT1_CAPTURE2; SAI3_TXFS pin's mux option #1 should be GPT1_CAPTURE2, NOT GPT1_CLK. Fixes: c1c9d41319c3 ("dt-bindings: imx: Add pinctrl binding doc for imx8mm") Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
| | * | ARM: dts: imx6ul: fix clock frequency property name of I2C busesSébastien Szymanski2019-07-225-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A few boards set clock frequency of their I2C buses with "clock_frequency" property. The right property is "clock-frequency". Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com> Reviewed-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
| | * | ARM: dts: imx7ulp: Fix usb-phy unit address formatFabio Estevam2019-07-221-1/+1
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following warning is seen when building with W=1: arch/arm/boot/dts/imx7ulp.dtsi:189.31-195.5: Warning (simple_bus_reg): /bus@40000000/usb-phy@0x40350000: simple-bus unit address format error, expected "40350000" Fix it as suggested by removing the extra "0x" notation. Fixes: 5b7bd456318a ("ARM: dts: imx7ulp: add imx7ulp USBOTG1 support") Signed-off-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
| * | ARM: defconfig: u8500: Add new driversLinus Walleij2019-07-231-1/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This enables the new or updates driver options for U8500 that got merged into v5.3-rc1: - CMA, MCDE driver, LIMA driver and the Samsung S6D16D0 driver enabled by default bringing up the new graphics support. Include the LOGO so we can see when the graphics are live. - We use the IIO hwmon bridge for reflecting temperature in the system. - Set MUSB to PIO mode as this is the one working most stable for the time being. - HWSPINLOCK needs to be set to get the hardware semaphore driver to compile and link properly. Link: https://lore.kernel.org/r/20190723081523.13079-2-linus.walleij@linaro.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Olof Johansson <olof@lixom.net>
| * | ARM: defconfig: u8500: Refresh defconfigLinus Walleij2019-07-231-14/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This refreshes the outdated U8500 defconfig: some options moved around, PS/2 mouse is no longer default on, crypto options moved around etc. Link: https://lore.kernel.org/r/20190723081523.13079-1-linus.walleij@linaro.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Olof Johansson <olof@lixom.net>
| * | ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-muxArnd Bergmann2019-07-231-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mdio-bus-mux has no #address-cells/#size-cells property, which causes a few dtc warnings: arch/arm/boot/dts/bcm47094-linksys-panamera.dts:129.4-18: Warning (reg_format): /mdio-bus-mux/mdio@200:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1) arch/arm/boot/dts/bcm47094-linksys-panamera.dtb: Warning (pci_device_bus_num): Failed prerequisite 'reg_format' arch/arm/boot/dts/bcm47094-linksys-panamera.dtb: Warning (i2c_bus_reg): Failed prerequisite 'reg_format' arch/arm/boot/dts/bcm47094-linksys-panamera.dtb: Warning (spi_bus_reg): Failed prerequisite 'reg_format' arch/arm/boot/dts/bcm47094-linksys-panamera.dts:128.22-132.5: Warning (avoid_default_addr_size): /mdio-bus-mux/mdio@200: Relying on default #address-cells value arch/arm/boot/dts/bcm47094-linksys-panamera.dts:128.22-132.5: Warning (avoid_default_addr_size): /mdio-bus-mux/mdio@200: Relying on default #size-cells value Add the normal cell numbers. Link: https://lore.kernel.org/r/20190722145618.1155492-1-arnd@arndb.de Fixes: 2bebdfcdcd0f ("ARM: dts: BCM5301X: Add support for Linksys EA9500") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Olof Johansson <olof@lixom.net>
| * | ARM: davinci: fix sleep.S build error on ARMv4Arnd Bergmann2019-07-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When building a multiplatform kernel that includes armv4 support, the default target CPU does not support the blx instruction, which leads to a build failure: arch/arm/mach-davinci/sleep.S: Assembler messages: arch/arm/mach-davinci/sleep.S:56: Error: selected processor does not support `blx ip' in ARM mode Add a .arch statement in the sources to make this file build. Link: https://lore.kernel.org/r/20190722145211.1154785-1-arnd@arndb.de Acked-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Olof Johansson <olof@lixom.net>
| * | ARM: Delete netx a second timeLinus Walleij2019-07-2220-1860/+0
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit ceb02dcf676f ARM: delete netx machine deleted the mach-netx machine. Then eight days later it was resurrected by SPDX tag fixes. I think. Taking the liberty to fix some additional debug uart cruft. Link: https://lore.kernel.org/r/20190721224157.6597-1-linus.walleij@linaro.org Fixes: ceb02dcf676f ("ARM: delete netx machine") Acked-By: Robert Schwebel <r.schwebel@pengutronix.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Olof Johansson <olof@lixom.net>
* | Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2019-07-287-23/+75
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "A set of x86 fixes and functional updates: - Prevent stale huge I/O TLB mappings on 32bit. A long standing bug which got exposed by KPTI support for 32bit - Prevent bogus access_ok() warnings in arch_stack_walk_user() - Add display quirks for Lenovo devices which have height and width swapped - Add the missing CR2 fixup for 32 bit async pagefaults. Fallout of the CR2 bug fix series. - Unbreak handling of force enabled HPET by moving the 'is HPET counting' check back to the original place. - A more accurate check for running on a hypervisor platform in the MDS mitigation code. Not perfect, but more accurate than the previous one. - Update a stale and confusing comment vs. IRQ stacks" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/speculation/mds: Apply more accurate check on hypervisor platform x86/hpet: Undo the early counter is counting check x86/entry/32: Pass cr2 to do_async_page_fault() x86/irq/64: Update stale comment x86/sysfb_efi: Add quirks for some devices with swapped width and height x86/stacktrace: Prevent access_ok() warnings in arch_stack_walk_user() mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy() x86/mm: Sync also unmappings in vmalloc_sync_all() x86/mm: Check for pfn instead of page in vmalloc_sync_one()
| * | x86/speculation/mds: Apply more accurate check on hypervisor platformZhenzhong Duan2019-07-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | X86_HYPER_NATIVE isn't accurate for checking if running on native platform, e.g. CONFIG_HYPERVISOR_GUEST isn't set or "nopv" is enabled. Checking the CPU feature bit X86_FEATURE_HYPERVISOR to determine if it's running on native platform is more accurate. This still doesn't cover the platforms on which X86_FEATURE_HYPERVISOR is unsupported, e.g. VMware, but there is nothing which can be done about this scenario. Fixes: 8a4b06d391b0 ("x86/speculation/mds: Add sysfs reporting for MDS") Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/1564022349-17338-1-git-send-email-zhenzhong.duan@oracle.com
| * | x86/hpet: Undo the early counter is counting checkThomas Gleixner2019-07-251-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rui reported that on a Pentium D machine which has HPET forced enabled because it is not advertised by ACPI, the early counter is counting check leads to a silent boot hang. The reason is that the ordering of checking the counter first and then reconfiguring the HPET fails to work on that machine. As the HPET is not advertised and presumably not initialized by the BIOS the early enable and the following reconfiguration seems to bring it into a broken state. Adding clocksource=jiffies to the command line results in the following clocksource watchdog warning: clocksource: timekeeping watchdog on CPU1: Marking clocksource 'tsc-early' as unstable because the skew is too large: clocksource: 'hpet' wd_now: 33 wd_last: 33 mask: ffffffff That clearly shows that the HPET is not counting after it got reconfigured and reenabled. If the counter is not working then the HPET timer is not expiring either, which explains the boot hang. Move the counter is counting check after the full configuration again to unbreak these systems. Reported-by: Rui Salvaterra <rsalvaterra@gmail.com> Fixes: 3222daf970f3 ("x86/hpet: Separate counter check out of clocksource register code") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Rui Salvaterra <rsalvaterra@gmail.com> Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1907250810530.1791@nanos.tec.linutronix.de
| * | x86/entry/32: Pass cr2 to do_async_page_fault()Matt Mullins2019-07-241-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a0d14b8909de ("x86/mm, tracing: Fix CR2 corruption") added the address parameter to do_async_page_fault(), but does not pass it from the 32-bit entry point. To plumb it through, factor-out common_exception_read_cr2 in the same fashion as common_exception, and uses it from both page_fault and async_page_fault. For a 32-bit KVM guest, this fixes: Run /sbin/init as init process Starting init: /sbin/init exists but couldn't execute it (error -14) Fixes: a0d14b8909de ("x86/mm, tracing: Fix CR2 corruption") Signed-off-by: Matt Mullins <mmullins@fb.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20190724042058.24506-1-mmullins@fb.com
| * | x86/irq/64: Update stale commentCao jin2019-07-221-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit e6401c130931 ("x86/irq/64: Split the IRQ stack into its own pages") missed to update one piece of comment as it did to its peer in Xen, which will confuse people who still need to read comment. Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190719081635.26528-1-caoj.fnst@cn.fujitsu.com
| * | x86/sysfb_efi: Add quirks for some devices with swapped width and heightHans de Goede2019-07-221-0/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some Lenovo 2-in-1s with a detachable keyboard have a portrait screen but advertise a landscape resolution and pitch, resulting in a messed up display if the kernel tries to show anything on the efifb (because of the wrong pitch). Fix this by adding a new DMI match table for devices which need to have their width and height swapped. At first it was tried to use the existing table for overriding some of the efifb parameters, but some of the affected devices have variants with different LCD resolutions which will not work with hardcoded override values. Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1730783 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190721152418.11644-1-hdegoede@redhat.com
| * | x86/stacktrace: Prevent access_ok() warnings in arch_stack_walk_user()Eiichi Tsukata2019-07-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When arch_stack_walk_user() is called from atomic contexts, access_ok() can trigger the following warning if compiled with CONFIG_DEBUG_ATOMIC_SLEEP=y. Reproducer: // CONFIG_DEBUG_ATOMIC_SLEEP=y # cd /sys/kernel/debug/tracing # echo 1 > options/userstacktrace # echo 1 > events/irq/irq_handler_entry/enable WARNING: CPU: 0 PID: 2649 at arch/x86/kernel/stacktrace.c:103 arch_stack_walk_user+0x6e/0xf6 CPU: 0 PID: 2649 Comm: bash Not tainted 5.3.0-rc1+ #99 RIP: 0010:arch_stack_walk_user+0x6e/0xf6 Call Trace: <IRQ> stack_trace_save_user+0x10a/0x16d trace_buffer_unlock_commit_regs+0x185/0x240 trace_event_buffer_commit+0xec/0x330 trace_event_raw_event_irq_handler_entry+0x159/0x1e0 __handle_irq_event_percpu+0x22d/0x440 handle_irq_event_percpu+0x70/0x100 handle_irq_event+0x5a/0x8b handle_edge_irq+0x12f/0x3f0 handle_irq+0x34/0x40 do_IRQ+0xa6/0x1f0 common_interrupt+0xf/0xf </IRQ> Fix it by calling __range_not_ok() directly instead of access_ok() as copy_from_user_nmi() does. This is fine here because the actual copy is inside a pagefault disabled region. Reported-by: Juri Lelli <juri.lelli@gmail.com> Signed-off-by: Eiichi Tsukata <devel@etsukata.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190722083216.16192-2-devel@etsukata.com
| * | x86/mm: Sync also unmappings in vmalloc_sync_all()Joerg Roedel2019-07-221-8/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With huge-page ioremap areas the unmappings also need to be synced between all page-tables. Otherwise it can cause data corruption when a region is unmapped and later re-used. Make the vmalloc_sync_one() function ready to sync unmappings and make sure vmalloc_sync_all() iterates over all page-tables even when an unmapped PMD is found. Fixes: 5d72b4fba40ef ('x86, mm: support huge I/O mapping capability I/F') Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/20190719184652.11391-3-joro@8bytes.org
| * | x86/mm: Check for pfn instead of page in vmalloc_sync_one()Joerg Roedel2019-07-221-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | Do not require a struct page for the mapped memory location because it might not exist. This can happen when an ioremapped region is mapped with 2MB pages. Fixes: 5d72b4fba40ef ('x86, mm: support huge I/O mapping capability I/F') Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/20190719184652.11391-2-joro@8bytes.org
* | Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds2019-07-282-5/+4
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Thomas Gleixner: "A pile of perf related fixes: Kernel: - Fix SLOTS PEBS event constraints for Icelake CPUs - Add the missing mask bit to allow counting hardware generated prefetches on L3 for Icelake CPUs - Make the test for hypervisor platforms more accurate (as far as possible) - Handle PMUs correctly which override event->cpu - Yet another missing fallthrough annotation Tools: perf.data: - Fix loading of compressed data split across adjacent records - Fix buffer size setting for processing CPU topology perf.data header. perf stat: - Fix segfault for event group in repeat mode - Always separate "stalled cycles per insn" line, it was being appended to the "instructions" line. perf script: - Fix --max-blocks man page description. - Improve man page description of metrics. - Fix off by one in brstackinsn IPC computation. perf probe: - Avoid calling freeing routine multiple times for same pointer. perf build: - Do not use -Wshadow on gcc < 4.8, avoiding too strict warnings treated as errors, breaking the build" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel: Mark expected switch fall-throughs perf/core: Fix creating kernel counters for PMUs that override event->cpu perf/x86: Apply more accurate check on hypervisor platform perf/x86/intel: Fix invalid Bit 13 for Icelake MSR_OFFCORE_RSP_x register perf/x86/intel: Fix SLOTS PEBS event constraint perf build: Do not use -Wshadow on gcc < 4.8 perf probe: Avoid calling freeing routine multiple times for same pointer perf probe: Set pev->nargs to zero after freeing pev->args entries perf session: Fix loading of compressed data split across adjacent records perf stat: Always separate stalled cycles per insn perf stat: Fix segfault for event group in repeat mode perf tools: Fix proper buffer size for feature processing perf script: Fix off by one in brstackinsn IPC computation perf script: Improve man page description of metrics perf script: Fix --max-blocks man page description
| * | perf/x86/intel: Mark expected switch fall-throughsGustavo A. R. Silva2019-07-251-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warnings: arch/x86/events/intel/core.c: In function ‘intel_pmu_init’: arch/x86/events/intel/core.c:4959:8: warning: this statement may fall through [-Wimplicit-fallthrough=] arch/x86/events/intel/core.c:5008:8: warning: this statement may fall through [-Wimplicit-fallthrough=] Warning level 3 was used: -Wimplicit-fallthrough=3 This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190624161913.GA32270@embeddedor Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | perf/x86: Apply more accurate check on hypervisor platformZhenzhong Duan2019-07-251-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | check_msr is used to fix a bug report in guest where KVM doesn't support LBR MSR and cause #GP. The msr check is bypassed on real HW to workaround a false failure, see commit d0e1a507bdc7 ("perf/x86/intel: Disable check_msr for real HW") When running a guest with CONFIG_HYPERVISOR_GUEST not set or "nopv" enabled, current check isn't enough and #GP could trigger. Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/1564022366-18293-1-git-send-email-zhenzhong.duan@oracle.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | perf/x86/intel: Fix invalid Bit 13 for Icelake MSR_OFFCORE_RSP_x registerYunying Sun2019-07-251-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Intel SDM states that bit 13 of Icelake's MSR_OFFCORE_RSP_x register is valid, and used for counting hardware generated prefetches of L3 cache. Update the bitmask to allow bit 13. Before: $ perf stat -e cpu/event=0xb7,umask=0x1,config1=0x1bfff/u sleep 3 Performance counter stats for 'sleep 3': <not supported> cpu/event=0xb7,umask=0x1,config1=0x1bfff/u After: $ perf stat -e cpu/event=0xb7,umask=0x1,config1=0x1bfff/u sleep 3 Performance counter stats for 'sleep 3': 9,293 cpu/event=0xb7,umask=0x1,config1=0x1bfff/u Signed-off-by: Yunying Sun <yunying.sun@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@kernel.org Cc: alexander.shishkin@linux.intel.com Cc: bp@alien8.de Cc: hpa@zytor.com Cc: jolsa@redhat.com Cc: namhyung@kernel.org Link: https://lkml.kernel.org/r/20190724082932.12833-1-yunying.sun@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | perf/x86/intel: Fix SLOTS PEBS event constraintKan Liang2019-07-251-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sampling SLOTS event and ref-cycles event in a group on Icelake gives EINVAL. SLOTS event is the event stands for the fixed counter 3, not fixed counter 2. Wrong mask was set to SLOTS event in intel_icl_pebs_event_constraints[]. Reported-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 6017608936c1 ("perf/x86/intel: Add Icelake support") Link: https://lkml.kernel.org/r/20190723200429.8180-1-kan.liang@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | Merge tag 'Wimplicit-fallthrough-5.3-rc2' of ↵Linus Torvalds2019-07-271-0/+2
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux Pull Wimplicit-fallthrough enablement from Gustavo A. R. Silva: "This marks switch cases where we are expecting to fall through, and globally enables the -Wimplicit-fallthrough option in the main Makefile. Finally, some missing-break fixes that have been tagged for -stable: - drm/amdkfd: Fix missing break in switch statement - drm/amdgpu/gfx10: Fix missing break in switch statement With these changes, we completely get rid of all the fall-through warnings in the kernel" * tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: Makefile: Globally enable fall-through warning drm/i915: Mark expected switch fall-throughs drm/amd/display: Mark expected switch fall-throughs drm/amdkfd/kfd_mqd_manager_v10: Avoid fall-through warning drm/amdgpu/gfx10: Fix missing break in switch statement drm/amdkfd: Fix missing break in switch statement perf/x86/intel: Mark expected switch fall-throughs mtd: onenand_base: Mark expected switch fall-through afs: fsclient: Mark expected switch fall-throughs afs: yfsclient: Mark expected switch fall-throughs can: mark expected switch fall-throughs firewire: mark expected switch fall-throughs
| * | perf/x86/intel: Mark expected switch fall-throughsGustavo A. R. Silva2019-07-261-0/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warnings: arch/x86/events/intel/core.c: In function ‘intel_pmu_init’: arch/x86/events/intel/core.c:4959:8: warning: this statement may fall through [-Wimplicit-fallthrough=] pmem = true; ~~~~~^~~~~~ arch/x86/events/intel/core.c:4960:2: note: here case INTEL_FAM6_SKYLAKE_MOBILE: ^~~~ arch/x86/events/intel/core.c:5008:8: warning: this statement may fall through [-Wimplicit-fallthrough=] pmem = true; ~~~~~^~~~~~ arch/x86/events/intel/core.c:5009:2: note: here case INTEL_FAM6_ICELAKE_MOBILE: ^~~~ Warning level 3 was used: -Wimplicit-fallthrough=3 This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
* | Merge tag 's390-5.3-3' of ↵Linus Torvalds2019-07-2712-59/+79
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Heiko Carstens: - Add ABI to kernel image file which allows e.g. the file utility to figure out the kernel version. - Wire up clone3 system call. - Add support for kasan bitops instrumentation. - uapi header cleanup: use __u{16,32,64} instead of uint{16,32,64}_t. - Provide proper ARCH_ZONE_DMA_BITS so the s390 DMA zone is correctly defined with 2 GB instead of the default value of 1 MB. - Farhan Ali leaves the group of vfio-ccw maintainers. - Various small vfio-ccw fixes. - Add missing locking for airq_areas array in virtio code. - Minor qdio improvements. * tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: MAINTAINERS: vfio-ccw: Remove myself as the maintainer s390/mm: use shared variables for sysctl range check virtio/s390: fix race on airq_areas[] s390/dma: provide proper ARCH_ZONE_DMA_BITS value s390/kasan: add bitops instrumentation s390/bitops: make test functions return bool s390: wire up clone3 system call kbuild: enable arch/s390/include/uapi/asm/zcrypt.h for uapi header test s390: use __u{16,32,64} instead of uint{16,32,64}_t in uapi header s390/hypfs: fix a typo in the name of a function s390/qdio: restrict QAOB usage to IQD unicast queues s390/qdio: add sanity checks to the fast-requeue path s390: enable detection of kernel version from bzImage Documentation: fix vfio-ccw doc vfio-ccw: Update documentation for csch/hsch vfio-ccw: Don't call cp_free if we are processing a channel program vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn vfio-ccw: Fix memory leak and don't call cp_free in cp_init vfio-ccw: Fix misleading comment when setting orb.cmd.c64
| * | s390/mm: use shared variables for sysctl range checkVasily Gorbik2019-07-261-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit eec4844fae7c ("proc/sysctl: add shared variables for range check") special shared variables are available for sysctl range check. Reuse them for /proc/sys/vm/allocate_pgste proc handler. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * | s390/dma: provide proper ARCH_ZONE_DMA_BITS valueHalil Pasic2019-07-261-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On s390 ZONE_DMA is up to 2G, i.e. ARCH_ZONE_DMA_BITS should be 31 bits. The current value is 24 and makes __dma_direct_alloc_pages() take a wrong turn first (but __dma_direct_alloc_pages() recovers then). Let's correct ARCH_ZONE_DMA_BITS value and avoid wrong turns. Signed-off-by: Halil Pasic <pasic@linux.ibm.com> Reported-by: Petr Tesarik <ptesarik@suse.cz> Fixes: c61e9637340e ("dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32") Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * | s390/kasan: add bitops instrumentationVasily Gorbik2019-07-231-30/+35
| | | | | | | | | | | | | | | | | | | | | | | | Add KASAN instrumentation of architecture-specific asm implementation of bitops. It also covers s390 specific *_inv functions. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * | s390/bitops: make test functions return boolVasily Gorbik2019-07-231-12/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make s390/bitops test functions return bool values. That enforces return value range to 0 and 1 and matches with asm-generic/bitops-instrumented.h declarations as well as some other architectures implementations. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * | s390: wire up clone3 system callVasily Gorbik2019-07-232-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tested (64-bit and compat mode) using program from http://lkml.kernel.org/r/20190604212930.jaaztvkent32b7d3@brauner.io with the following: return syscall(__NR_clone, flags, 0, pidfd, 0, 0); changed to: return syscall(__NR_clone, 0, flags, pidfd, 0, 0); due to CLONE_BACKWARDS2. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * | s390: use __u{16,32,64} instead of uint{16,32,64}_t in uapi headerMasahiro Yamada2019-07-231-17/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When CONFIG_UAPI_HEADER_TEST=y, exported headers are compile-tested to make sure they can be included from user-space. Currently, zcrypt.h is excluded from the test coverage. To make it join the compile-test, we need to fix the build errors attached below. For a case like this, we decided to use __u{8,16,32,64} variable types in this discussion: https://lkml.org/lkml/2019/6/5/18 Build log: CC usr/include/asm/zcrypt.h.s In file included from <command-line>:32:0: ./usr/include/asm/zcrypt.h:163:2: error: unknown type name ‘uint16_t’ uint16_t cprb_len; ^~~~~~~~ ./usr/include/asm/zcrypt.h:168:2: error: unknown type name ‘uint32_t’ uint32_t source_id; ^~~~~~~~ ./usr/include/asm/zcrypt.h:169:2: error: unknown type name ‘uint32_t’ uint32_t target_id; ^~~~~~~~ ./usr/include/asm/zcrypt.h:170:2: error: unknown type name ‘uint32_t’ uint32_t ret_code; ^~~~~~~~ ./usr/include/asm/zcrypt.h:171:2: error: unknown type name ‘uint32_t’ uint32_t reserved1; ^~~~~~~~ ./usr/include/asm/zcrypt.h:172:2: error: unknown type name ‘uint32_t’ uint32_t reserved2; ^~~~~~~~ ./usr/include/asm/zcrypt.h:173:2: error: unknown type name ‘uint32_t’ uint32_t payload_len; ^~~~~~~~ ./usr/include/asm/zcrypt.h:182:2: error: unknown type name ‘uint16_t’ uint16_t ap_id; ^~~~~~~~ ./usr/include/asm/zcrypt.h:183:2: error: unknown type name ‘uint16_t’ uint16_t dom_id; ^~~~~~~~ ./usr/include/asm/zcrypt.h:198:2: error: unknown type name ‘uint16_t’ uint16_t targets_num; ^~~~~~~~ ./usr/include/asm/zcrypt.h:199:2: error: unknown type name ‘uint64_t’ uint64_t targets; ^~~~~~~~ ./usr/include/asm/zcrypt.h:200:2: error: unknown type name ‘uint64_t’ uint64_t weight; ^~~~~~~~ ./usr/include/asm/zcrypt.h:201:2: error: unknown type name ‘uint64_t’ uint64_t req_no; ^~~~~~~~ ./usr/include/asm/zcrypt.h:202:2: error: unknown type name ‘uint64_t’ uint64_t req_len; ^~~~~~~~ ./usr/include/asm/zcrypt.h:203:2: error: unknown type name ‘uint64_t’ uint64_t req; ^~~~~~~~ ./usr/include/asm/zcrypt.h:204:2: error: unknown type name ‘uint64_t’ uint64_t resp_len; ^~~~~~~~ ./usr/include/asm/zcrypt.h:205:2: error: unknown type name ‘uint64_t’ uint64_t resp; ^~~~~~~~ Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * | s390/hypfs: fix a typo in the name of a functionChristophe JAILLET2019-07-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Everything is about hypfs_..., except 'hpyfs_vm_create_guest()' s/hpy/hyp/ Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
| * | s390: enable detection of kernel version from bzImageVasily Gorbik2019-07-235-2/+13
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extend "parmarea" to include an offset of the version string, which is stored as 8-byte big endian value. To retrieve version string from bzImage reliably, one should check the presence of "S390EP" ascii string at 0x10008 (available since v3.2), then read the version string offset from 0x10428 (which has been 0 since v3.2 up to now). The string is null terminated. Could be retrieved with the following "file" command magic (requires file v5.34): 8 string \x02\x00\x00\x18\x60\x00\x00\x50\x02\x00\x00\x68\x60\x00\x00\x50\x40\x40\x40\x40\x40\x40\x40\x40 Linux S390 >0x10008 string S390EP >>0x10428 bequad >0 >>>(0x10428.Q) string >\0 \b, version %s Reported-by: Petr Tesarik <ptesarik@suse.com> Suggested-by: Petr Tesarik <ptesarik@suse.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | Merge tag 'docs-5.3-1' of git://git.lwn.net/linuxLinus Torvalds2019-07-261-1/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation fixes from Jonathan Corbet: "This is mostly a set of follow-on fixes from Mauro fixing various fallout from the massive RST conversion; a few other small fixes as well" * tag 'docs-5.3-1' of git://git.lwn.net/linux: (21 commits) docs: phy: Drop duplicate 'be made' doc:it_IT: translations in process/ docs/vm: transhuge: fix typo in madvise reference doc:it_IT: rephrase statement doc:it_IT: align translation to mainline docs: load_config.py: ensure subdirs end with "/" docs: virtual: add it to the documentation body docs: remove extra conf.py files docs: load_config.py: avoid needing a conf.py just due to LaTeX docs scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output scripts/sphinx-pre-install: cleanup Gentoo checks scripts/sphinx-pre-install: fix latexmk dependencies scripts/sphinx-pre-install: don't use LaTeX with CentOS 7 scripts/sphinx-pre-install: fix script for RHEL/CentOS docs: conf.py: only use CJK if the font is available docs: conf.py: add CJK package needed by translations docs: pdf: add all Documentation/*/index.rst to PDF output docs: fix broken doc references due to renames docs: power: add it to to the main documentation index docs: powerpc: convert docs to ReST and rename to *.rst ...
| * \ Merge branch 'pdf_fixes_v1' of https://git.linuxtv.org/mchehab/experimental ↵Jonathan Corbet2019-07-221-1/+1
| |\ \ | | |/ | |/| | | | | | | | | | into mauro Bring in a set of post-thrashup fixes from Mauro.
| | * docs: powerpc: convert docs to ReST and rename to *.rstMauro Carvalho Chehab2019-07-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert docs to ReST and add them to the arch-specific book. The conversion here was trivial, as almost every file there was already using an elegant format close to ReST standard. The changes were mostly to mark literal blocks and add a few missing section title identifiers. One note with regards to "--": on Sphinx, this can't be used to identify a list, as it will format it badly. This can be used, however, to identify a long hyphen - and "---" is an even longer one. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> # cxl
* | | Merge tag 'arm64-fixes' of ↵Linus Torvalds2019-07-2614-97/+207
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "There's more here than we usually have at this stage, but that's mainly down to the stacktrace changes which came in slightly too late for the merge window. Summary: - Big bad batch of MAINTAINERS updates - Fix handling of SP alignment fault exceptions - Fix PSTATE.SSBS handling on heterogeneous systems - Fix fallout from moving to the generic vDSO implementation - Fix stack unwinding in the face of frame corruption - Fix off-by-one in IORT code - Minor SVE cleanups" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id() arm64: entry: SP Alignment Fault doesn't write to FAR_EL1 arm64: Force SSBS on context switch MAINTAINERS: Update my email address MAINTAINERS: Update my email address MAINTAINERS: Fix spelling mistake in my name MAINTAINERS: Update my email address to @kernel.org arm64: mm: Drop pte_huge() arm64/sve: Fix a couple of magic numbers for the Z-reg count arm64/sve: Factor out FPSIMD to SVE state conversion arm64: stacktrace: Better handle corrupted stacks arm64: stacktrace: Factor out backtrace initialisation arm64: stacktrace: Constify stacktrace.h functions arm64: vdso: Cleanup Makefiles arm64: vdso: fix flip/flop vdso build bug arm64: vdso: Fix population of AT_SYSINFO_EHDR for compat vdso
| * | | arm64: entry: SP Alignment Fault doesn't write to FAR_EL1James Morse2019-07-221-9/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Comparing the arm-arm's pseudocode for AArch64.PCAlignmentFault() with AArch64.SPAlignmentFault() shows that SP faults don't copy the faulty-SP to FAR_EL1, but this is where we read from, and the address we provide to user-space with the BUS_ADRALN signal. For user-space this value will be UNKNOWN due to the previous ERET to user-space. If the last value is preserved, on systems with KASLR or KPTI this will be the user-space link-register left in FAR_EL1 by tramp_exit(). Fix this to retrieve the original sp_el0 value, and pass this to do_sp_pc_fault(). SP alignment faults from EL1 will cause us to take the fault again when trying to store the pt_regs. This eventually takes us to the overflow stack. Remove the ESR_ELx_EC_SP_ALIGN check as we will never make it this far. Fixes: 60ffc30d5652 ("arm64: Exception handling") Signed-off-by: James Morse <james.morse@arm.com> [will: change label name and fleshed out comment] Signed-off-by: Will Deacon <will@kernel.org>
| * | | arm64: Force SSBS on context switchMarc Zyngier2019-07-222-3/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On a CPU that doesn't support SSBS, PSTATE[12] is RES0. In a system where only some of the CPUs implement SSBS, we end-up losing track of the SSBS bit across task migration. To address this issue, let's force the SSBS bit on context switch. Fixes: 8f04e8e6e29c ("arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3") Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> [will: inverted logic and added comments] Signed-off-by: Will Deacon <will@kernel.org>
| * | | arm64: mm: Drop pte_huge()Anshuman Khandual2019-07-221-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This helper is required from generic huge_pte_alloc() which is available when arch subscribes ARCH_WANT_GENERAL_HUGETLB. arm64 implements it's own huge_pte_alloc() and does not depend on the generic definition. Drop this helper which is redundant on arm64. Cc: Mark Rutland <mark.rutland@arm.com> Cc: Steve Capper <Steve.Capper@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
| * | | arm64/sve: Fix a couple of magic numbers for the Z-reg countDave Martin2019-07-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are some hand-written instances of "32" to express the number of SVE Z-registers. Since this code was written a #define was added for this, so convert trivial instances of this magic number as appropriate. No functional change. Reviewed-by: Julien Grall <julien.grall@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
| * | | arm64/sve: Factor out FPSIMD to SVE state conversionDave Martin2019-07-221-13/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we convert from FPSIMD to SVE register state in memory in two places. To ease future maintenance, let's consolidate this in one place. Reviewed-by: Julien Grall <julien.grall@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
| * | | arm64: stacktrace: Better handle corrupted stacksMark Rutland2019-07-222-9/+88
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The arm64 stacktrace code is careful to only dereference frame records in valid stack ranges, ensuring that a corrupted frame record won't result in a faulting access. However, it's still possible for corrupt frame records to result in infinite loops in the stacktrace code, which is also undesirable. This patch ensures that we complete a stacktrace in finite time, by keeping track of which stacks we have already completed unwinding, and verifying that if the next frame record is on the same stack, it is at a higher address. As this has turned out to be particularly subtle, comments are added to explain the procedure. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: James Morse <james.morse@arm.com> Tested-by: James Morse <james.morse@arm.com> Acked-by: Dave Martin <Dave.Martin@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Tengfei Fan <tengfeif@codeaurora.org> Signed-off-by: Will Deacon <will@kernel.org>
| * | | arm64: stacktrace: Factor out backtrace initialisationDave Martin2019-07-227-42/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some common code is required by each stacktrace user to initialise struct stackframe before the first call to unwind_frame(). In preparation for adding to the common code, this patch factors it out into a separate function start_backtrace(), and modifies the stacktrace callers appropriately. No functional change. Signed-off-by: Dave Martin <dave.martin@arm.com> [Mark: drop tsk argument, update more callsites] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: James Morse <james.morse@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
| * | | arm64: stacktrace: Constify stacktrace.h functionsDave Martin2019-07-221-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | on_accessible_stack() and on_task_stack() shouldn't (and don't) modify their task argument, so it can be const. This patch adds the appropriate modifiers. Whitespace violations in the parameter lists are fixed at the same time. No functional change. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Dave Martin <dave.martin@arm.com> [Mark: fixup const location, whitespace] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
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