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* Merge tag 'fixes-for-linus' of ↵Linus Torvalds2014-07-0523-59/+266
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "This week's arm-soc fixes: - A set of of OMAP patches that we had missed Tony's pull request of: * Reset fix for am43xx * Proper OPP table for omap5 * Fix for SoC detection of one of the DRA7 SoCs * hwmod updates to get SATA and OCP to work on omap5 (drivers merged in 3.16) * ... plus a handful of smaller fixes - sunxi needed to re-add machine specific restart code that was removed in anticipation of a watchdog driver being merged for 3.16, and it didn't make it in. - Marvell fixes for PCIe on SMP and a big-endian fix. - A trivial defconfig update to make my capri test board boot with bcm_defconfig again. ... and a couple of MAINTAINERS updates, one to claim new Keystone drivers that have been merged, and one to merge MXS and i.MX (both Freescale platforms). The largest diffs come from the hwmod code for omap5 and the re-add of the restart code on sunxi. The hwmod stuff is quite late at this point but it slipped through cracks repeatedly while coming up the maintainer chain and only affects the one SoC so risk is low" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: MAINTAINERS: Add few more Keystone drivers MAINTAINERS: merge MXS entry into IMX one ARM: sunxi: Reintroduce the restart code for A10/A20 SoCs ARM: mvebu: fix cpuidle implementation to work on big-endian systems ARM: mvebu: update L2/PCIe deadlock workaround after L2CC cleanup ARM: mvebu: move Armada 375 external abort logic as a quirk ARM: bcm: Fix bcm and multi_v7 defconfigs ARM: dts: dra7-evm: remove interrupt binding ARM: OMAP2+: Fix parser-bug in platform muxing code ARM: DTS: dra7/dra7xx-clocks: ATL related changes ARM: OMAP2+: drop unused function ARM: dts: am43x-epos-evm: Add Missing cpsw-phy-sel for am43x-epos-evm ARM: dts: omap5: Update CPU OPP table as per final production Manual ARM: DRA722: add detection of SoC information ARM: dts: Enable twl4030 off-idle configuration for selected omaps ARM: OMAP5: hwmod: Add ocp2scp3 and sata hwmods ARM: OMAP2+: hwmod: Change hardreset soc_ops for AM43XX
| * Merge tag 'mvebu-fixes-3.16-2' of git://git.infradead.org/linux-mvebu into fixesOlof Johansson2014-07-044-18/+47
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mvebu fixes for v3.16 (round #2) - mvebu - Fix PCIe deadlock now that SMP is enabled - Fix cpuidle for big-endian systems * tag 'mvebu-fixes-3.16-2' of git://git.infradead.org/linux-mvebu: ARM: mvebu: fix cpuidle implementation to work on big-endian systems ARM: mvebu: update L2/PCIe deadlock workaround after L2CC cleanup ARM: mvebu: move Armada 375 external abort logic as a quirk Signed-off-by: Olof Johansson <olof@lixom.net>
| | * ARM: mvebu: fix cpuidle implementation to work on big-endian systemsThomas Petazzoni2014-06-303-8/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Marvell Armada XP, when a CPU comes back from deep idle state of cpuidle, it restarts its execution at armada_370_xp_cpu_resume(), which puts back the CPU into the coherency, and then calls the generic cpu_resume() function. While this works on little-endian configurations, it doesn't work on big-endian configurations because the CPU restarts in little-endian, and therefore must be switched back to big-endian to operate properly. To achieve this, a 'setend be' instruction must be executed in big-endian configurations. However, the ARM_BE8() macro that is used to implement nice compile-time conditional for ARM LE vs. ARM BE8 is not easily usable in inline assembly. Therefore, this patch moves the armada_370_xp_cpu_resume() C function, which was anyway just a block of inline assembly, into a proper pmsu_ll.S file, and adds the appropriate ARM_BE8(setend be) instruction. Without this patch, an Armada XP big endian configuration with cpuidle enabled fails to boot, as it hangs as soon as one of the CPU hits the deep idle state. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1404130165-3593-1-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
| | * ARM: mvebu: update L2/PCIe deadlock workaround after L2CC cleanupThomas Petazzoni2014-06-301-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 497a92308af8e9385fa3d135f7f416a997e4b93b ("ARM: mvebu: implement L2/PCIe deadlock workaround") introduced some logic in coherency.c to adjust the PL310 cache controller Device Tree node of Armada 375 and Armada 38x platform to include the 'arm,io-coherent' property if the system is running with hardware I/O coherency enabled. However, with the L2CC driver cleanup done by Russell King, the initialization of the L2CC driver has been moved earlier, and is now part of the init_IRQ() ARM function in arch/arm/kernel/irq.c. Therefore, calling coherency_init() in ->init_time() is now too late, as the Device Tree property gets added too late (after the L2CC driver has been initialized). In order to fix this, this commit removes the ->init_time() callback use in board-v7.c and replaces it with an ->init_irq() callback. We therefore no longer use the default ->init_irq() callback, but we now use the default ->init_time() callback. In this newly introduced ->init_irq() callback, we call irqchip_init() which is the default behavior when ->init_irq() isn't defined, and then do the initialization related to the coherency: SCU, coherency fabric, and mvebu-mbus (which is needed to start secondary CPUs). Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1402585772-10405-4-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
| | * ARM: mvebu: move Armada 375 external abort logic as a quirkThomas Petazzoni2014-06-301-4/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation to a small re-organization of the initialization sequence in board-v7.c, this commit moves the registration of the custom external abort handler on Armada 375 later in the boot sequence, and makes it more similar to the other quirks that we already have. There is indeed no need to register this abort handler particularly early, it simply needs to be registered before switching to userspace. In addition to this, this commit makes the registration of the custom abort handler conditional on Armada 375 Z1, because Armada 375 A0 and later iterations are not affected by the issue. This commit was tested on both Armada 375 Z1 and Armada 375 A0 platforms. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1402585772-10405-3-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
| * | ARM: sunxi: Reintroduce the restart code for A10/A20 SoCsMaxime Ripard2014-07-041-0/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This partly reverts commits 553600502b84 (ARM: sunxi: Remove reset code from the platform) and 5e669ec583e2 (ARM: sunxi: Remove init_machine callback) for the sun4i, sun5i and sun7i families. This is needed because the watchdog counterpart of these commits was dropped, and didn't make it into 3.16. In order to still be able to reboot the board, we need to reintroduce that code. Of course, the long term view is still to get rid of that code in mach-sunxi. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Olof Johansson <olof@lixom.net>
| * | Merge tag 'omap-for-v3.16/fixes-against-rc1' of ↵Olof Johansson2014-07-0416-39/+139
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes Merge OMAP fixes from Tony Lindgren: Fixes for omaps for issues discovered during the merge window and enabling of a few features that had to wait for the driver dependencies to clear. The fixes included are: - Fix am43xx hard reset flags - Fix SoC detection for DRA722 - Fix CPU OPP table for omap5 - Fix legacy mux parser bug if requested muxname is a prefix of multiple mux entries - Fix qspi interrupt binding that relies on the irq crossbar that has not yet been enabled - Add missing phy_sel for am43x-epos-evm - Drop unused gic_init_irq() that is no longer needed And the enabling of features that had driver dependencies are: - Change dra7 to use Audio Tracking Logic clock instead of a fixed clock now that the clock driver for it has been merged - Enable off idle configuration for selected omaps as all the kernel dependencies for device tree based booting are finally merged as this is needed to get the automated PM tests working finally with device tree based booting - Add hwmod entry for ocp2scp3 for omap5 to get sata working as all the driver dependencies are now in the kernel and this patch fell through the cracks during the merge window * tag 'omap-for-v3.16/fixes-against-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: dts: dra7-evm: remove interrupt binding ARM: OMAP2+: Fix parser-bug in platform muxing code ARM: DTS: dra7/dra7xx-clocks: ATL related changes ARM: OMAP2+: drop unused function ARM: dts: am43x-epos-evm: Add Missing cpsw-phy-sel for am43x-epos-evm ARM: dts: omap5: Update CPU OPP table as per final production Manual ARM: DRA722: add detection of SoC information ARM: dts: Enable twl4030 off-idle configuration for selected omaps ARM: OMAP5: hwmod: Add ocp2scp3 and sata hwmods ARM: OMAP2+: hwmod: Change hardreset soc_ops for AM43XX
| | * | ARM: dts: dra7-evm: remove interrupt bindingSourav Poddar2014-06-171-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The qspi node defines crossbar number as its interrupt number. But, the crossbar dts patches are not yet there, this causes a warning during boot. So interrupts = < > property should be removed from DT and added later by crossbar series. Reported-by: Sricharan R <r.sricharan@ti.com> Signed-off-by: Sourav Poddar <sourav.poddar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | ARM: OMAP2+: Fix parser-bug in platform muxing codeDavid R. Piegdon2014-06-171-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a parser-bug in the omap2 muxing code where muxtable-entries will be wrongly selected if the requested muxname is a *prefix* of their m0-entry and they have a matching mN-entry. Fix by additionally checking that the length of the m0_entry is equal. For example muxing of "dss_data2.dss_data2" on omap32xx will fail because the prefix "dss_data2" will match the mux-entries "dss_data2" as well as "dss_data20", with the suffix "dss_data2" matching m0 (for dss_data2) and m4 (for dss_data20). Thus both are recognized as signal path candidates: Relevant muxentries from mux34xx.c: _OMAP3_MUXENTRY(DSS_DATA20, 90, "dss_data20", NULL, "mcspi3_somi", "dss_data2", "gpio_90", NULL, NULL, "safe_mode"), _OMAP3_MUXENTRY(DSS_DATA2, 72, "dss_data2", NULL, NULL, NULL, "gpio_72", NULL, NULL, "safe_mode"), This will result in a failure to mux the pin at all: _omap_mux_get_by_name: Multiple signal paths (2) for dss_data2.dss_data2 Patch should apply to linus' latest master down to rather old linux-2.6 trees. Signed-off-by: David R. Piegdon <lkml@p23q.org> Cc: stable@vger.kernel.org [tony@atomide.com: updated description to include full description] Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | ARM: DTS: dra7/dra7xx-clocks: ATL related changesPeter Ujfalusi2014-06-162-8/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modify the clock nodes for the ATL clocks to use the ATL clock driver to handle them. Add the ATL device node at the same time for DRA7. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | ARM: OMAP2+: drop unused functionBrian Norris2014-06-162-21/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gic_init_irq() is no longer used as of: commit b42b918194c4791510ac049e3d507169a7de8544 Author: Tony Lindgren <tony@atomide.com> Date: Thu May 30 12:53:05 2013 -0700 ARM: OMAP2+: Remove board-omap4panda.c Drop it. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: Tony Lindgren <tony@atomide.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-omap@vger.kernel.org Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | ARM: dts: am43x-epos-evm: Add Missing cpsw-phy-sel for am43x-epos-evmGeorge Cherian2014-06-161-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | AM437x EPOS evm use external clock for RMII interface. Enable the same in DT. Signed-off-by: George Cherian <george.cherian@ti.com> Reported-by: Nishanth Menon <nm@ti.com> Tested-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | ARM: dts: omap5: Update CPU OPP table as per final production ManualNishanth Menon2014-06-161-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As per the Final production Data Manual for OMAP5432, SWPS050F(APRIL 2014) There are only two OPPs - 1GHz and 1.5GHz. the older OPP_LOW has been completely descoped. The Nominal voltages are still correct though. However, expectation for final production configuration is operation with Adaptive Body Bias (ABB) and Adaptive Voltage Scaling Class 0 operation. There are no IDcode or version change information encoded to programmatically detect this and software is supposed to NOT use OPP_LOW(500MHz) anymore for all devices (legacy and production samples). Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | ARM: DRA722: add detection of SoC informationNishanth Menon2014-06-162-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for DRA72x device DIEID. Currently these devices are reported as DRA75/74 family of processors. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | Merge tag 'for-v3.16-rc/omap-fixes-a' of ↵Tony Lindgren2014-06-164-6/+81
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v3.16/fixes Two OMAP hwmod patches for early v3.16-rc kernels. There's one OMAP SoC integration fix for the AM43xx SoC, without which, IP blocks can't be placed into hard-reset. There is also one OMAP5 SoC data addition patch that should have gone in for v3.16. Normally I wouldn't send this as part of an -rc series, since it's not technically a fix. But I'd like to make an exception in this case because: - it's intended to go in very early in the v3.16-rc series (or even pre-rc1); - it's a fairly small change; - the impact is limited to a single SoC and a single device; - the only reason that it didn't go in earlier is because it "slipped through the cracks," rather than for any technical reason. Basic build, boot, and PM test logs are available here: http://www.pwsan.com/omap/testlogs/hwmod-a-v3.16-rc/20140615201307/
| | | * | ARM: OMAP5: hwmod: Add ocp2scp3 and sata hwmodsKeshava Munegowda2014-06-151-0/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create hwmods for ocp2scp3 and sata modules. [Roger Q] Clean up. CC: Benoit Cousson <bcousson@baylibre.com> Signed-off-by: Balaji T K <balajitk@ti.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
| | | * | ARM: OMAP2+: hwmod: Change hardreset soc_ops for AM43XXDave Gerlach2014-06-153-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | am43xx reset register layout is more similar to am33xx than omap4 so use the am33xx functions for hwmod hardreset soc_ops rather than the currently used omap4 functions. Without this, assert_hardreset and deassert_hardreset will not work on am43xx. Signed-off-by: Dave Gerlach <d-gerlach@ti.com> [paul@pwsan.com: fixed build errors for an AM43xx-only Kconfig] Signed-off-by: Paul Walmsley <paul@pwsan.com>
| | * | | ARM: dts: Enable twl4030 off-idle configuration for selected omapsTony Lindgren2014-06-163-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | N900 now seems to shut down the external oscillator when hitting off-idle. And Beagle XM seems to have OSC_EN pin connected to allow shutting down the oscillator looking at the schematics. The oscillator output is cut off in off-idle and you can monitor it from R56 on the bottom side of the board near the power jack. Note that for beagle we need to also enable the UART wake-up event, the others have that enabled in earlier patches. OMAP37XX EVM (TMDSEVM3730) does not seem to have twl4030 clken pin connected, so there is no point trying to enable shutting down of the oscillator on it for the extra latency it adds. Signed-off-by: Tony Lindgren <tony@atomide.com>
| * | | | ARM: bcm: Fix bcm and multi_v7 defconfigsOlof Johansson2014-06-262-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BCM (Kona/capri platform) has regressed in two ways on this release. First, bcm_defconfig no longer selected the appropriate MMC driver options due to changes in dependencies. Secondly, the new MFD and regulator drivers were not enabled on multi_v7_defconfig, so that caused the system to fail probing MMC there. Fix by enabling the new options as needed. Cc: Matt Porter <matt.porter@linaro.org> Cc: Christian Daudt <bcm@fixthebug.org> Signed-off-by: Olof Johansson <olof@lixom.net>
* | | | | Merge tag 'arm64-fixes' of ↵Linus Torvalds2014-07-055-6/+9
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull ARM64 fixes from Catalin Marinas: - Exception level check at boot time (for completeness, not triggering any bug before) - I/D-cache synchronisation logic for huge pages - Config symbol typo * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: fix el2_setup check of CurrentEL arm64: mm: Make icache synchronisation logic huge page aware arm64: mm: Fix horrendous config typo
| * | | | | arm64: fix el2_setup check of CurrentELMarc Zyngier2014-07-043-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CurrentEL system register reports the Current Exception Level of the CPU. It doesn't say anything about the stack handling, and yet we compare it to PSR_MODE_EL2t and PSR_MODE_EL2h. It works by chance because PSR_MODE_EL2t happens to match the right bits, but that's otherwise a very bad idea. Just check for the EL value instead. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> [catalin.marinas@arm.com: fixed arch/arm64/kernel/efi-entry.S] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | | | | arm64: mm: Make icache synchronisation logic huge page awareSteve Capper2014-07-041-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The __sync_icache_dcache routine will only flush the dcache for the first page of a compound page, potentially leading to stale icache data residing further on in a hugetlb page. This patch addresses this issue by taking into consideration the order of the page when flushing the dcache. Reported-by: Mark Brown <broonie@linaro.org> Tested-by: Mark Brown <broonie@linaro.org> Signed-off-by: Steve Capper <steve.capper@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org> # v3.11+
| * | | | | arm64: mm: Fix horrendous config typoSteve Capper2014-07-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The define ARM64_64K_PAGES is tested for rather than CONFIG_ARM64_64K_PAGES. Correct that typo here. Signed-off-by: Steve Capper <steve.capper@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | | | | | ptrace,x86: force IRET path after a ptrace_stop()Tejun Heo2014-07-031-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'sysret' fastpath does not correctly restore even all regular registers, much less any segment registers or reflags values. That is very much part of why it's faster than 'iret'. Normally that isn't a problem, because the normal ptrace() interface catches the process using the signal handler infrastructure, which always returns with an iret. However, some paths can get caught using ptrace_event() instead of the signal path, and for those we need to make sure that we aren't going to return to user space using 'sysret'. Otherwise the modifications that may have been done to the register set by the tracer wouldn't necessarily take effect. Fix it by forcing IRET path by setting TIF_NOTIFY_RESUME from arch_ptrace_stop_needed() which is invoked from ptrace_stop(). Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Andy Lutomirski <luto@amacapital.net> Acked-by: Oleg Nesterov <oleg@redhat.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2014-07-016-17/+18
|\ \ \ \ \ \ | |/ / / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull KVM fixes from Paolo Bonzini: "A bunch of one-liners (except the s390 one). The two more serious bugs ("KVM: SVM: Fix CPL export via SS.DPL" and "KVM: s390: add sie.h uapi header file to Kbuild and remove header dependency") were introduced in the 3.16 merge window" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: SVM: Fix CPL export via SS.DPL KVM: s390: add sie.h uapi header file to Kbuild and remove header dependency MIPS: KVM: Fix memory leak on VCPU KVM: x86: preserve the high 32-bits of the PAT register kvm: fix wrong address when writing Hyper-V tsc page KVM: x86: Increase the number of fixed MTRR regs to 10
| * | | | | Merge commit '33b458d276bb' into kvm-masterPaolo Bonzini2014-06-301-0/+1
| |\ \ \ \ \
| | * | | | | KVM: SVM: Fix CPL export via SS.DPLJan Kiszka2014-06-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We import the CPL via SS.DPL since ae9fedc793. However, we fail to export it this way so far. This caused spurious guest crashes, e.g. of Linux when accessing the vmport from guest user space which triggered register saving/restoring to/from host user space. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| * | | | | | Merge tag 'kvms390-20140626' of ↵Paolo Bonzini2014-06-272-14/+13
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master Fix sie.h header related problems introduced during the 3.16 development cycle.
| | * | | | | | KVM: s390: add sie.h uapi header file to Kbuild and remove header dependencyHeiko Carstens2014-06-262-14/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sie.h was missing in arch/s390/include/uapi/asm/Kbuild and therefore missed the "make headers_check" target. If added it reveals that also arch/s390/include/asm/sigp.h would become uapi. This is something we certainly do not want. So remove that dependency as well. The header file was merged with ceae283bb2e0176c "KVM: s390: add sie exit reasons tables", therefore we never had a kernel release with this commit and can still change anything. Acked-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
| * | | | | | | MIPS: KVM: Fix memory leak on VCPUDeng-Cheng Zhu2014-06-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kvm_arch_vcpu_free() is called in 2 code paths: 1) kvm_vm_ioctl() kvm_vm_ioctl_create_vcpu() kvm_arch_vcpu_destroy() kvm_arch_vcpu_free() 2) kvm_put_kvm() kvm_destroy_vm() kvm_arch_destroy_vm() kvm_mips_free_vcpus() kvm_arch_vcpu_free() Neither of the paths handles VCPU free. We need to do it in kvm_arch_vcpu_free() corresponding to the memory allocation in kvm_arch_vcpu_create(). Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Cc: stable@vger.kernel.org Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| * | | | | | | KVM: x86: preserve the high 32-bits of the PAT registerPaolo Bonzini2014-06-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | KVM does not really do much with the PAT, so this went unnoticed for a long time. It is exposed however if you try to do rdmsr on the PAT register. Reported-by: Valentine Sinitsyn <valentine.sinitsyn@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| * | | | | | | kvm: fix wrong address when writing Hyper-V tsc pageXiaoming Gao2014-06-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When kvm_write_guest writes the tsc_ref structure to the guest, or it will lead the low HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT bits of the TSC page address must be cleared, or the guest can see a non-zero sequence number. Otherwise Windows guests would not be able to get a correct clocksource (QueryPerformanceCounter will always return 0) which causes serious chaos. Signed-off-by: Xiaoming Gao <newtongao@tencnet.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| * | | | | | | KVM: x86: Increase the number of fixed MTRR regs to 10Nadav Amit2014-06-191-1/+1
| | |_|_|/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Recent Intel CPUs have 10 variable range MTRRs. Since operating systems sometime make assumptions on CPUs while they ignore capability MSRs, it is better for KVM to be consistent with recent CPUs. Reporting more MTRRs than actually supported has no functional implications. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* | | | | | | Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds2014-06-295-6/+42
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull ARM fixes from Russell King: "Another round of ARM fixes. The largest change here is the L2 changes to work around problems for the Armada 37x/380 devices, where most of the size comes down to comments rather than code. The other significant fix here is for the ptrace code, to ensure that rewritten syscalls work as intended. This was pointed out by Kees Cook, but Will Deacon reworked the patch to be more elegant. The remainder are fairly trivial changes" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 8087/1: ptrace: reload syscall number after secure_computing() check ARM: 8086/1: Set memblock limit for nommu ARM: 8085/1: sa1100: collie: add top boot mtd partition ARM: 8084/1: sa1100: collie: revert back to cfi_probe ARM: 8080/1: mcpm.h: remove unused variable declaration ARM: 8076/1: mm: add support for HW coherent systems in PL310 cache
| * | | | | | | ARM: 8087/1: ptrace: reload syscall number after secure_computing() checkWill Deacon2014-06-291-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On the syscall tracing path, we call out to secure_computing() to allow seccomp to check the syscall number being attempted. As part of this, a SIGTRAP may be sent to the tracer and the syscall could be re-written by a subsequent SET_SYSCALL ptrace request. Unfortunately, this new syscall is ignored by the current code unless TIF_SYSCALL_TRACE is also set on the current thread. This patch slightly reworks the enter path of the syscall tracing code so that we always reload the syscall number from current_thread_info()->syscall after the potential ptrace traps. Acked-by: Kees Cook <keescook@chromium.org> Tested-by: Kees Cook <keescook@chromium.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | | | | ARM: 8086/1: Set memblock limit for nommuLaura Abbott2014-06-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 1c2f87c (ARM: 8025/1: Get rid of meminfo) changed find_limits to use memblock_get_current_limit for calculating the max_low pfn. nommu targets never actually set a limit on memblock though which means memblock_get_current_limit will just return the default value. Set the memblock_limit to be the end of DDR to make sure bounds are calculated correctly. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | | | | ARM: 8085/1: sa1100: collie: add top boot mtd partitionAndrea Adami2014-06-291-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CFI mapping is now perfect so we can expose the top block, read only. There isn't much to read, though, just the sharpsl_params values. Signed-off-by: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | | | | ARM: 8084/1: sa1100: collie: revert back to cfi_probeAndrea Adami2014-06-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reverts commit d26b17edafc45187c30cae134a5e5429d58ad676 ARM: sa1100: collie.c: fall back to jedec_probe flash detection Unfortunately the detection was challenged on the defective unit used for tests: one of the NOR chips did not respond to the CFI query. Moreover that bad device needed extra delays on erase-suspend/resume cycles. Tested personally on 3 different units and with feedback of two other users. Signed-off-by: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | | | | ARM: 8080/1: mcpm.h: remove unused variable declarationNicolas Pitre2014-06-291-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The sync_phys variable has been replaced by link time computation in mcpm_head.S before the code was submitted upstream. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | | | | ARM: 8076/1: mm: add support for HW coherent systems in PL310 cacheThomas Petazzoni2014-06-291-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a PL310 cache is used on a system that provides hardware coherency, the outer cache sync operation is useless, and can be skipped. Moreover, on some systems, it is harmful as it causes deadlocks between the Marvell coherency mechanism, the Marvell PCIe controller and the Cortex-A9. To avoid this, this commit introduces a new Device Tree property 'arm,io-coherent' for the L2 cache controller node, valid only for the PL310 cache. It identifies the usage of the PL310 cache in an I/O coherent configuration. Internally, it makes the driver disable the outer cache sync operation. Note that technically speaking, a fully coherent system wouldn't require any of the other .outer_cache operations. However, in practice, when booting secondary CPUs, these are not yet coherent, and therefore a set of cache maintenance operations are necessary at this point. This explains why we keep the other .outer_cache operations and only ->sync is disabled. While in theory any write to a PL310 register could cause the deadlock, in practice, disabling ->sync is sufficient to workaround the deadlock, since the other cache maintenance operations are only used in very specific situations. Contrary to previous versions of this patch, this new version does not simply NULL-ify the ->sync member, because the l2c_init_data structures are now 'const' and therefore cannot be modified, which is a good thing. Therefore, this patch introduces a separate l2c_init_data instance, called of_l2c310_coherent_data. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | | | | | | Merge branch 'x86/urgent' of ↵Linus Torvalds2014-06-2711-124/+297
|\ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Peter Anvin: "A pile of fixes related to the VDSO, EFI and 32-bit badsys handling. It turns out that removing the section headers from the VDSO breaks gdb, so this puts back most of them. A very simple typo broke rt_sigreturn on some versions of glibc, with obviously disastrous results. The rest is pretty much fixes for the corresponding fallout. The EFI fixes fixes an arithmetic overflow on 32-bit systems and quiets some build warnings. Finally, when invoking an invalid system call number on x86-32, we bypass a bunch of handling, which can make the audit code oops" * 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi-pstore: Fix an overflow on 32-bit builds x86/vdso: Error out in vdso2c if DT_RELA is present x86/vdso: Move DISABLE_BRANCH_PROFILING into the vdso makefile x86_32, signal: Fix vdso rt_sigreturn x86_32, entry: Do syscall exit work on badsys (CVE-2014-4508) x86/vdso: Create .build-id links for unstripped vdso files x86/vdso: Remove some redundant in-memory section headers x86/vdso: Improve the fake section headers x86/vdso2c: Use better macros for ELF bitness x86/vdso: Discard the __bug_table section efi: Fix compiler warnings (unused, const, type)
| * | | | | | | | x86/vdso: Error out in vdso2c if DT_RELA is presentAndy Lutomirski2014-06-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | vdso2c was checking for various types of relocations to detect when the vdso had undefined symbols or was otherwise dependent on relocation at load time. Undefined symbols in the vdso would fail if accessed at runtime, and certain implementation errors (e.g. branch profiling or incorrect symbol visibilities) could result in data access through the GOT that requires relocations. This could be as simple as: extern char foo; return foo; Without some kind of visibility control, the compiler would assume that foo could be interposed at load time and would generate a relocation. x86-64 and x32 (as opposed to i386) use explicit-addent (RELA) instead of implicit-addent (REL) relocations for data access, and vdso2c forgot to detect those. Whether these bad relocations would actually fail at runtime depends on what the linker sticks in the unrelocated references. Nonetheless, these relocations have no business existing in the vDSO and should be fixed rather than silently ignored. This error could trigger on some configurations due to branch profiling. The previous patch fixed that. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/74ef0c00b4d2a3b573e00a4113874e62f772e348.1403642755.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86/vdso: Move DISABLE_BRANCH_PROFILING into the vdso makefileAndy Lutomirski2014-06-242-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DISABLE_BRANCH_PROFILING turns off branch profiling (i.e. a redefinition of 'if'). Branch profiling depends on a bunch of kernel-internal symbols and generates extra output sections, none of which are useful or functional in the vDSO. It's currently turned off for vclock_gettime.c, but vgetcpu.c also triggers branch profiling, so just turn it off in the makefile. This fixes the build on some configurations: the vdso could contain undefined symbols, and the fake section table overflowed due to ftrace's added sections. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/bf1ec29e03b2bbc081f6dcaefa64db1c3a83fb21.1403642755.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86_32, signal: Fix vdso rt_sigreturnAndy Lutomirski2014-06-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit: commit 6f121e548f83674ab4920a4e60afb58d4f61b829 Author: Andy Lutomirski <luto@amacapital.net> Date: Mon May 5 12:19:34 2014 -0700 x86, vdso: Reimplement vdso.so preparation in build-time C Contained this obvious typo: - restorer = VDSO32_SYMBOL(current->mm->context.vdso, rt_sigreturn); + restorer = current->mm->context.vdso + + selected_vdso32->sym___kernel_sigreturn; Note the missing 'rt_' in the new code. Fix it. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/1eb40ad923acde2e18357ef2832867432e70ac42.1403361010.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86_32, entry: Do syscall exit work on badsys (CVE-2014-4508)Andy Lutomirski2014-06-231-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bad syscall nr paths are their own incomprehensible route through the entry control flow. Rearrange them to work just like syscalls that return -ENOSYS. This fixes an OOPS in the audit code when fast-path auditing is enabled and sysenter gets a bad syscall nr (CVE-2014-4508). This has probably been broken since Linux 2.6.27: af0575bba0 i386 syscall audit fast-path Cc: stable@vger.kernel.org Cc: Roland McGrath <roland@redhat.com> Reported-by: Toralf Förster <toralf.foerster@gmx.de> Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/e09c499eade6fc321266dd6b54da7beb28d6991c.1403558229.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86/vdso: Create .build-id links for unstripped vdso filesAndy Lutomirski2014-06-201-3/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With this change, doing 'make vdso_install' and telling gdb: set debug-file-directory /lib/modules/KVER/vdso will enable vdso debugging with symbols. This is useful for testing, but kernel RPM builds will probably want to manually delete these symlinks or otherwise do something sensible when they strip the vdso/*.so files. If ld does not support --build-id, then the symlinks will not be created. Note that kernel packagers that use vdso_install may need to adjust their packaging scripts to accomdate this change. For example, Fedora's scripts create build-id symlinks themselves in a different location, so the spec should probably be updated to remove the symlinks created by make vdso_install. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/a424b189ce3ced85fe1e82d032a20e765e0fe0d3.1403291930.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86/vdso: Remove some redundant in-memory section headersAndy Lutomirski2014-06-193-24/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | .data doesn't need to be separate from .rodata: they're both readonly. .altinstructions and .altinstr_replacement aren't needed by anything except vdso2c; strip them from the final image. While we're at it, rather than aligning the actual executable text, just shove some unused-at-runtime data in between real data and text. My vdso image is still above 4k, but I'm disinclined to try to trim it harder for 3.16. For future trimming, I suspect that these sections could be moved to later in the file and dropped from the in-memory image: .gnu.version and .gnu.version_d (this may lose versions in gdb) .eh_frame (should be harmless) .eh_frame_hdr (I'm not really sure) .hash (AFAIK nothing needs this section header) Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/2e96d0c49016ea6d026a614ae645e93edd325961.1403129369.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86/vdso: Improve the fake section headersAndy Lutomirski2014-06-198-67/+237
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fully stripping the vDSO has other unfortunate side effects: - binutils is unable to find ELF notes without a SHT_NOTE section. - Even elfutils has trouble: it can find ELF notes without a section table at all, but if a section table is present, it won't look for PT_NOTE. - gdb wants section names to match between stripped DSOs and their symbols; otherwise it will corrupt symbol addresses. We're also breaking the rules: section 0 is supposed to be SHT_NULL. Fix these problems by building a better fake section table. While we're at it, we might as well let buggy Go versions keep working well by giving the SHT_DYNSYM entry the correct size. This is a bit unfortunate: it adds quite a bit of size to the vdso image. If/when binutils improves and the improved versions become widespread, it would be worth considering dropping most of this. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/0e546a5eeaafdf1840e6ee654a55c1e727c26663.1403129369.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86/vdso2c: Use better macros for ELF bitnessAndy Lutomirski2014-06-192-40/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than using a separate macro for each replacement, use generic macros. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/d953cd2e70ceee1400985d091188cdd65fba2f05.1403129369.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | | | | | x86/vdso: Discard the __bug_table sectionAndy Lutomirski2014-06-191-0/+1
| | |/ / / / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It serves no purpose in user code. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Link: http://lkml.kernel.org/r/2a5bebff42defd8a5e81d96f7dc00f21143c80e8.1403129369.git.luto@amacapital.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 06:32:16 +0000