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2021-10-18mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>Christoph Hellwig
There is no need to pull blk-cgroup.h and thus blkdev.h in here, so break the include chain. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18mm: Add flush_dcache_folio()Matthew Wilcox (Oracle)
This is a default implementation which calls flush_dcache_page() on each page in the folio. If architectures can do better, they should implement their own version of it. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Vlastimil Babka <vbabka@suse.cz>
2021-10-18iommu/vt-d: Clean up unused PASID updating functionsFenghua Yu
update_pasid() and its call chain are currently unused in the tree because Thomas disabled the ENQCMD feature. The feature will be re-enabled shortly using a different approach and update_pasid() and its call chain will not be used in the new approach. Remove the useless functions. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20210920192349.2602141-1-fenghua.yu@intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20211014053839.727419-8-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2021-10-18Merge 5.15-rc6 into usb-nextGreg Kroah-Hartman
We need the usb fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-10-18Merge 5.15-rc6 into tty-nextGreg Kroah-Hartman
We need the serial/tty fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-10-18Merge 5.15-rc6 into staging-nextGreg Kroah-Hartman
We need the staging fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-10-18clocksource/drivers/arch_arm_timer: Move workaround synchronisation aroundMarc Zyngier
We currently handle synchronisation when workarounds are enabled by having an ISB in the __arch_counter_get_cnt?ct_stable() helpers. While this works, this prevents us from relaxing this synchronisation. Instead, move it closer to the point where the synchronisation is actually needed. Further patches will subsequently relax this. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211017124225.3018098-14-maz@kernel.org Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-17Merge tag 'powerpc-5.15-4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Fix a bug where guests on P9 with interrupts passed through could get stuck in synchronize_irq(). - Fix a bug in KVM on P8 where secondary threads entering a guest would write outside their allocated stack. - Fix a bug in KVM on P8 where secondary threads could confuse the host offline code and cause the guest or host to crash. Thanks to Cédric Le Goater. * tag 'powerpc-5.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: KVM: PPC: Book3S HV: Make idle_kvm_start_guest() return 0 if it went to guest KVM: PPC: Book3S HV: Fix stack handling in idle_kvm_start_guest() powerpc/xive: Discard disabled interrupts in get_irqchip_state()
2021-10-17Merge tag 'perf_urgent_for_v5.15_rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fix from Borislav Petkov: - Add Sapphire Rapids to the list of CPUs supporting the SMI count MSR * tag 'perf_urgent_for_v5.15_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/msr: Add Sapphire Rapids CPU support
2021-10-17Merge tag 'x86_urgent_for_v5.15_rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Borislav Petkov: - Do not enable AMD memory encryption in Kconfig by default due to shortcomings of some platforms, leading to boot failures. - Mask out invalid bits in the MXCSR for 32-bit kernels again because Thomas and I don't know how to mask out bits properly. Third time's the charm. * tag 'x86_urgent_for_v5.15_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/fpu: Mask out the invalid MXCSR bits properly x86/Kconfig: Do not enable AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT automatically
2021-10-17Merge tag 'driver-core-5.15-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here are some small driver core fixes for 5.15-rc6, all of which have been in linux-next for a while with no reported issues. They include: - kernfs negative dentry bugfix - simple pm bus fixes to resolve reported issues" * tag 'driver-core-5.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: drivers: bus: Delete CONFIG_SIMPLE_PM_BUS drivers: bus: simple-pm-bus: Add support for probing simple bus only devices driver core: Reject pointless SYNC_STATE_ONLY device links kernfs: don't create a negative dentry if inactive node exists
2021-10-17ARM: dts: qcom-pma8084: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-24-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-pm8941: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-23-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-pm8841: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-22-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-msm8660: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-21-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-mdm9615: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-20-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-apq8064: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-19-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-apq8060-dragonboard: fix mpps state namesDmitry Baryshkov
The majority of device tree nodes for mpps use xxxx-state as pinctrl nodes. Change names of mpps pinctrl nodes for qcom-apq8060-dragonboard board to follow that pattern. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-10-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-mdm9615: add gpio-ranges to mpps node, fix its nameDmitry Baryshkov
Rename mpp node to mpps@50 (instead of mpp@50). Also add gpio-ranges property to mpps device tree nodes, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-9-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-pma8084: add gpio-ranges to mpps nodesDmitry Baryshkov
Add gpio-ranges property to mpps device tree nodes, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-8-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-pm8941: add gpio-ranges to mpps nodesDmitry Baryshkov
Add gpio-ranges property to mpps device tree nodes, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-7-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-pm8841: add gpio-ranges to mpps nodesDmitry Baryshkov
Add gpio-ranges property to mpps device tree nodes, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-6-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-msm8660: add gpio-ranges to mpps nodesDmitry Baryshkov
Add gpio-ranges property to mpps device tree nodes, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-5-dmitry.baryshkov@linaro.org
2021-10-17ARM: dts: qcom-apq8064: add gpio-ranges to mpps nodesDmitry Baryshkov
Add gpio-ranges property to mpps device tree nodes, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-4-dmitry.baryshkov@linaro.org
2021-10-17arm64: dts: qcom: pm8994: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-26-dmitry.baryshkov@linaro.org
2021-10-17arm64: dts: qcom: pm8916: add interrupt controller propertiesDmitry Baryshkov
Now that the pmic-mpp is a proper hierarchical IRQ chip, add interrupt controller properties ('interrupt-controller' and '#interrupt-cells'). The interrupts property is no longer needed so remove it. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-25-dmitry.baryshkov@linaro.org
2021-10-17arm64: dts: qcom: apq8016-sbc: fix mpps state namesDmitry Baryshkov
The majority of device tree nodes for mpps use xxxx-state as pinctrl nodes. Change names of mpps pinctrl nodes for the apq8016-sbc board to follow that pattern. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-13-dmitry.baryshkov@linaro.org
2021-10-17arm64: dts: qcom: pm8994: fix mpps device tree nodeDmitry Baryshkov
Add missing "qcom,spmi-mpp" to the compatible list as required by the node description. Also add gpio-ranges property to mpps device tree node, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-12-dmitry.baryshkov@linaro.org
2021-10-17arm64: dts: qcom: pm8916: fix mpps device tree nodeDmitry Baryshkov
Add missing "qcom,spmi-mpp" to the compatible list as required by the node description. Also add gpio-ranges property to mpps device tree node, adding the mapping between pinctrl and GPIO pins. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20211008012524.481877-11-dmitry.baryshkov@linaro.org
2021-10-17clocksource/drivers/arm_arch_timer: Drop unnecessary ISB on CVAL programmingMarc Zyngier
Switching from TVAL to CVAL has a small drawback: we need an ISB before reading the counter. We cannot get rid of it, but we can instead remove the one that comes just after writing to CVAL. This reduces the number of ISBs from 3 to 2 when programming the timer. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211017124225.3018098-12-maz@kernel.org Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-17clocksource/drivers/arm_arch_timer: Move MMIO timer programming over to CVALMarc Zyngier
Similarily to the sysreg-based timer, move the MMIO over to using the CVAL registers instead of TVAL. Note that there is no warranty that the 64bit MMIO access will be atomic, but the timer is always disabled at the point where we program CVAL. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211017124225.3018098-8-maz@kernel.org Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-17clocksource/drivers/arm_arch_timer: Move system register timer programming ↵Marc Zyngier
over to CVAL In order to cope better with high frequency counters, move the programming of the timers from the countdown timer (TVAL) over to the comparator (CVAL). The programming model is slightly different, as we now need to read the current counter value to have an absolute deadline instead of a relative one. There is a small overhead to this change, which we will address in the following patches. Reviewed-by: Oliver Upton <oupton@google.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211017124225.3018098-5-maz@kernel.org Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-17clocksource/drivers/arm_arch_timer: Extend write side of timer register ↵Marc Zyngier
accessors to u64 The various accessors for the timer sysreg and MMIO registers are currently hardwired to 32bit. However, we are about to introduce the use of the CVAL registers, which require a 64bit access. Upgrade the write side of the accessors to take a 64bit value (the read side is left untouched as we don't plan to ever read back any of these registers). No functional change expected. Reviewed-by: Oliver Upton <oupton@google.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211017124225.3018098-4-maz@kernel.org Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-17clocksource/drivers/arm_arch_timer: Drop CNT*_TVAL read accessorsMarc Zyngier
The arch timer driver never reads the various TVAL registers, only writes to them. It is thus pointless to provide accessors for them and to implement errata workarounds. Drop these read-side accessors, and add a couple of BUG() statements for the time being. These statements will be removed further down the line. Reviewed-by: Oliver Upton <oupton@google.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211017124225.3018098-3-maz@kernel.org Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-17clocksource/arm_arch_timer: Add build-time guards for unhandled register ↵Marc Zyngier
accesses As we are about to change the registers that are used by the driver, start by adding build-time checks to ensure that we always handle all registers and access modes. Suggested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211017124225.3018098-2-maz@kernel.org Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-10-17rtc: s3c: remove HAVE_S3C_RTC in favor of direct dependenciesWill McVicker
The config HAVE_S3C_RTC is not really needed since we can simply just add the dependencies directly to RTC_DRV_S3C. Also, one less config to keep track of! Signed-off-by: Will McVicker <willmcvicker@google.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20211013212256.3425889-1-willmcvicker@google.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
2021-10-17arm64: dts: rockchip: Add analog audio on Quartz64Nicolas Frattaroli
On the Quartz64 Model A, the I2S1 TDM controller is connected to the rk817 codec in I2S mode. Enabling it and adding the necessary simple-sound-card and codec nodes allows for analog audio output on the PINE64 Quartz64 Model A SBC. Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com> Link: https://lore.kernel.org/r/20211016105354.116513-5-frattaroli.nicolas@gmail.com [some property sorting] Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2021-10-17arm64: dts: rockchip: Add i2s1 on rk356xNicolas Frattaroli
This adds the necessary device tree node on rk3566 and rk3568 to enable the I2S1 TDM audio controller. I2S0 has not been added, as it is connected to HDMI and there is no way to test that it's working without a functioning video clock (read: VOP2 driver). Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com> Link: https://lore.kernel.org/r/20211016105354.116513-4-frattaroli.nicolas@gmail.com Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2021-10-17Merge branch kvm-arm64/memory-accounting into kvmarm-master/nextMarc Zyngier
* kvm-arm64/memory-accounting: : . : Sprinkle a bunch of GFP_KERNEL_ACCOUNT all over the code base : to better track memory allocation made on behalf of a VM. : . KVM: arm64: Add memcg accounting to KVM allocations KVM: arm64: vgic: Add memcg accounting to vgic allocations Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-10-17KVM: arm64: Add memcg accounting to KVM allocationsJia He
Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM allocations"), it would be better to make arm64 KVM consistent with common kvm codes. The memory allocations of VM scope should be charged into VM process cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT. There remain a few cases since these allocations are global, not in VM scope. Signed-off-by: Jia He <justin.he@arm.com> Reviewed-by: Oliver Upton <oupton@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210907123112.10232-3-justin.he@arm.com
2021-10-17KVM: arm64: vgic: Add memcg accounting to vgic allocationsJia He
Inspired by commit 254272ce6505 ("kvm: x86: Add memcg accounting to KVM allocations"), it would be better to make arm64 vgic consistent with common kvm codes. The memory allocations of VM scope should be charged into VM process cgroup, hence change GFP_KERNEL to GFP_KERNEL_ACCOUNT. There remain a few cases since these allocations are global, not in VM scope. Signed-off-by: Jia He <justin.he@arm.com> Reviewed-by: Oliver Upton <oupton@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210907123112.10232-2-justin.he@arm.com
2021-10-17Merge branch kvm-arm64/vgic-fixes-5.16 into kvmarm-master/nextMarc Zyngier
* kvm-arm64/vgic-fixes-5.16: : . : Multiple updates to the GICv3 emulation in order to better support : the dreadful Apple M1 that only implements half of it, and in a : broken way... : . KVM: arm64: vgic-v3: Align emulated cpuif LPI state machine with the pseudocode KVM: arm64: vgic-v3: Don't advertise ICC_CTLR_EL1.SEIS KVM: arm64: vgic-v3: Reduce common group trapping to ICV_DIR_EL1 when possible KVM: arm64: vgic-v3: Work around GICv3 locally generated SErrors KVM: arm64: Force ID_AA64PFR0_EL1.GIC=1 when exposing a virtual GICv3 Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-10-17KVM: arm64: vgic-v3: Align emulated cpuif LPI state machine with the pseudocodeMarc Zyngier
Having realised that a virtual LPI does transition through an active state that does not exist on bare metal, align the CPU interface emulation with the behaviour specified in the architecture pseudocode. The LPIs now transition to active on IAR read, and to inactive on EOI write. Special care is taken not to increment the EOIcount for an LPI that isn't present in the LRs. Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211010150910.2911495-6-maz@kernel.org
2021-10-17KVM: arm64: vgic-v3: Don't advertise ICC_CTLR_EL1.SEISMarc Zyngier
Since we are trapping all sysreg accesses when ICH_VTR_EL2.SEIS is set, and that we never deliver an SError when emulating any of the GICv3 sysregs, don't advertise ICC_CTLR_EL1.SEIS. Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211010150910.2911495-5-maz@kernel.org
2021-10-17KVM: arm64: vgic-v3: Reduce common group trapping to ICV_DIR_EL1 when possibleMarc Zyngier
On systems that advertise ICH_VTR_EL2.SEIS, we trap all GICv3 sysreg accesses from the guest. From a performance perspective, this is OK as long as the guest doesn't hammer the GICv3 CPU interface. In most cases, this is fine, unless the guest actively uses priorities and switches PMR_EL1 very often. Which is exactly what happens when a Linux guest runs with irqchip.gicv3_pseudo_nmi=1. In these condition, the performance plumets as we hit PMR each time we mask/unmask interrupts. Not good. There is however an opportunity for improvement. Careful reading of the architecture specification indicates that the only GICv3 sysreg belonging to the common group (which contains the SGI registers, PMR, DIR, CTLR and RPR) that is allowed to generate a SError is DIR. Everything else is safe. It is thus possible to substitute the trapping of all the common group with just that of DIR if it supported by the implementation. Yes, that's yet another optional bit of the architecture. So let's just do that, as it leads to some impressive result on the M1: Without this change: bash-5.1# /host/home/maz/hackbench 100 process 1000 Running with 100*40 (== 4000) tasks. Time: 56.596 With this change: bash-5.1# /host/home/maz/hackbench 100 process 1000 Running with 100*40 (== 4000) tasks. Time: 8.649 which is a pretty convincing result. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Link: https://lore.kernel.org/r/20211010150910.2911495-4-maz@kernel.org
2021-10-17KVM: arm64: vgic-v3: Work around GICv3 locally generated SErrorsMarc Zyngier
The infamous M1 has a feature nobody else ever implemented, in the form of the "GIC locally generated SError interrupts", also known as SEIS for short. These SErrors are generated when a guest does something that violates the GIC state machine. It would have been simpler to just *ignore* the damned thing, but that's not what this HW does. Oh well. This part of of the architecture is also amazingly under-specified. There is a whole 10 lines that describe the feature in a spec that is 930 pages long, and some of these lines are factually wrong. Oh, and it is deprecated, so the insentive to clarify it is low. Now, the spec says that this should be a *virtual* SError when HCR_EL2.AMO is set. As it turns out, that's not always the case on this CPU, and the SError sometimes fires on the host as a physical SError. Goodbye, cruel world. This clearly is a HW bug, and it means that a guest can easily take the host down, on demand. Thankfully, we have seen systems that were just as broken in the past, and we have the perfect vaccine for it. Apple M1, please meet the Cavium ThunderX workaround. All your GIC accesses will be trapped, sanitised, and emulated. Only the signalling aspect of the HW will be used. It won't be super speedy, but it will at least be safe. You're most welcome. Given that this has only ever been seen on this single implementation, that the spec is unclear at best and that we cannot trust it to ever be implemented correctly, gate the workaround solely on ICH_VTR_EL2.SEIS being set. Tested-by: Joey Gouly <joey.gouly@arm.com> Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211010150910.2911495-3-maz@kernel.org
2021-10-17KVM: arm64: Force ID_AA64PFR0_EL1.GIC=1 when exposing a virtual GICv3Marc Zyngier
Until now, we always let ID_AA64PFR0_EL1.GIC reflect the value visible on the host, even if we were running a GICv2-enabled VM on a GICv3+compat host. That's fine, but we also now have the case of a host that does not expose ID_AA64PFR0_EL1.GIC==1 despite having a vGIC. Yes, this is confusing. Thank you M1. Let's go back to first principles and expose ID_AA64PFR0_EL1.GIC=1 when a GICv3 is exposed to the guest. This also hides a GICv4.1 CPU interface from the guest which has no business knowing about the v4.1 extension. Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211010150910.2911495-2-maz@kernel.org
2021-10-17arm64: dts: rockchip: change gpio nodenamesJohan Jonker
Currently all gpio nodenames are sort of identical to there label. Nodenames should be of a generic type, so change them all. Signed-off-by: Johan Jonker <jbx6244@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20211007144019.7461-3-jbx6244@gmail.com Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2021-10-17ARM: dts: rockchip: change gpio nodenamesJohan Jonker
Currently all gpio nodenames are sort of identical to there label. Nodenames should be of a generic type, so change them all. Signed-off-by: Johan Jonker <jbx6244@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20211007144019.7461-2-jbx6244@gmail.com Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2021-10-16arm64: defconfig: Enable Sleep stats driverMaulik Shah
Enable Sleep stats driver. The driver gives statistics for various low power modes on Qualcomm Technologies, Inc. (QTI) SoCs. Signed-off-by: Maulik Shah <mkshah@codeaurora.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/1634107104-22197-4-git-send-email-mkshah@codeaurora.org