KVM sometimes flushes host TLB entries, reading each one to check if it
corresponds to a guest KSeg0 address. In the absence of EntryHi.EHInv
bits to invalidate the whole entry, the entries will be set to unique
virtual addresses in KSeg0 (which is not TLB mapped), spaced 2*PAGE_SIZE
apart.
The TLB read however will clobber the CP0_PageMask register with
whatever page size that TLB entry had, and that same page size will be
written back into the TLB entry along with the unique address.
This would cause breakage when transparent huge pages are enabled on
64-bit host kernels, since huge page entries will overlap other nearby
entries when separated by only 2*PAGE_SIZE, causing a machine check
exception.
Fix this by restoring the old CP0_PageMask value (which should be set to
the normal page size) after reading the TLB entry if we're going to go
ahead and invalidate it.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
kvm_mips_trans_replace() passes a pointer to KVM_GUEST_KSEGX(). This
breaks on 64-bit builds due to the cast of that 64-bit pointer to a
different sized 32-bit int. Cast the pointer argument to an unsigned
long to work around the warning.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When emulating MFC0 instructions to load 32-bit values from guest COP0
registers and the RDHWR instruction to read the CC (Count) register,
sign extend the result to comply with the MIPS64 architecture. The
result must be in canonical 32-bit form or the guest may malfunction.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The MFC0 and MTC0 instructions in the guest which cause traps can be
replaced with 32-bit loads and stores to the commpage, however on big
endian 64-bit builds the offset needs to have 4 added so as to
load/store the least significant half of the long instead of the most
significant half.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Fail if the address of the allocated exception base doesn't fit into the
CP0_EBase register. This can happen on MIPS64 if CP0_EBase.WG isn't
implemented but RAM is available outside of the range of KSeg0.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Update the KVM entry point to write CP0_EBase as a 64-bit register when
it is 64-bits wide, and to set the WG (write gate) bit if it exists in
order to write bits 63:30 (or 31:30 on MIPS32).
Prior to MIPS64r6 it was UNDEFINED to perform a 64-bit read or write of
a 32-bit COP0 register. Since this is dynamically generated code,
generate the right type of access depending on whether the kernel is
64-bit and cpu_has_ebase_wg.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Update the KVM entry code to set the CP0_Entry.KX bit on 64-bit kernels.
This is important to allow the entry code, running in kernel mode, to
access the full 64-bit address space right up to the point of entering
the guest, and immediately after exiting the guest, so it can safely
restore & save the guest context from 64-bit segments.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The MIPS KVM entry code (originally kvm_locore.S, later locore.S, and
now entry.c) has never quite been right when built for 64-bit, using
32-bit instructions when 64-bit instructions were needed for handling
64-bit registers and pointers. Fix several cases of this now.
The changes roughly fall into the following categories.
- COP0 scratch registers contain guest register values and the VCPU
pointer, and are themselves full width. Similarly CP0_EPC and
CP0_BadVAddr registers are full width (even though technically we
don't support 64-bit guest address spaces with trap & emulate KVM).
Use MFC0/MTC0 for accessing them.
- Handling of stack pointers and the VCPU pointer must match the pointer
size of the kernel ABI (always o32 or n64), so use ADDIU.
- The CPU number in thread_info, and the guest_{user,kernel}_asid arrays
in kvm_vcpu_arch are all 32 bit integers, so use lw (instead of LW) to
load them.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There are several unportable uses of CKSEG0ADDR() in MIPS KVM, which
implicitly assume that a host physical address will be in the low 512MB
of the physical address space (accessible in KSeg0). These assumptions
don't hold for highmem or on 64-bit kernels.
When interpreting the guest physical address when reading or overwriting
a trapping instruction, use kmap_atomic() to get a usable virtual
address to access guest memory, which is portable to 64-bit and highmem
kernels.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Calculate the PFN of the commpage using virt_to_phys() instead of
CPHYSADDR(). This is more portable as kzalloc() may allocate from XKPhys
instead of KSeg0 on 64-bit kernels, which CPHYSADDR() doesn't handle.
This is sufficient for highmem kernels too since kzalloc() will allocate
from lowmem in KSeg0.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The KSEGX() macro is defined to 32-bit sign extend the address argument
and logically AND the result with 0xe0000000, with the final result
usually compared against one of the CKSEG macros. However the literal
0xe0000000 is unsigned as the high bit is set, and is therefore
zero-extended on 64-bit kernels, resulting in the sign extension bits of
the argument being masked to zero. This results in the odd situation
where:
KSEGX(CKSEG) != CKSEG
(0xffffffff80000000 & 0x00000000e0000000) != 0xffffffff80000000)
Fix this by 32-bit sign extending the 0xe0000000 literal using
_ACAST32_.
This will help some MIPS KVM code handling 32-bit guest addresses to
work on 64-bit host kernels, but will also affect KSEGX in
dec_kn01_be_backend() on a 64-bit DECstation kernel, and the SiByte DMA
page ops KSEGX check in clear_page() and copy_page() on 64-bit SB1
kernels, neither of which appear to be designed with 64-bit segments in
mind anyway.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Kexec needs to know the addresses of all VMCSs that are active on
each CPU, so that it can flush them from the VMCS caches. It is
safe to record superfluous addresses that are not associated with
an active VMCS, but it is not safe to omit an address associated
with an active VMCS.
After a call to vmcs_load, the VMCS that was loaded is active on
the CPU. The VMCS should be added to the CPU's list of active
VMCSs before it is loaded.
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
KVM maintains L1's current VMCS in guest memory, at the guest physical
page identified by the argument to VMPTRLD. This makes hairy
time-of-check to time-of-use bugs possible,as VCPUs can be writing
the the VMCS page in memory while KVM is emulating VMLAUNCH and
VMRESUME.
The spec documents that writing to the VMCS page while it is loaded is
"undefined". Therefore it is reasonable to load the entire VMCS into
an internal cache during VMPTRLD and ignore writes to the VMCS page
-- the guest should be using VMREAD and VMWRITE to access the current
VMCS.
To adhere to the spec, KVM should flush the current VMCS during VMPTRLD,
and the target VMCS during VMCLEAR (as given by the operand to VMCLEAR).
Since this implementation of VMCS caching only maintains the the current
VMCS, VMCLEAR will only do a flush if the operand to VMCLEAR is the
current VMCS pointer.
KVM will also flush during VMXOFF, which is not mandated by the spec,
but also not in conflict with the spec.
Signed-off-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Add support for an enable regulator to lp855x_bl
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Merge tag 'backlight-for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight
Pull backlight updates from Lee Jones:
"Add support for an enable regulator to lp855x_bl"
* tag 'backlight-for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
backlight: lp855x: Add enable regulator
- New API to call bespoke pre/post IRQ handlers; Regmap
- New Device Support
- Add support for RN5T567 to rn5t618
- Add support for COMe-cSL6 and COMe-mAL10 to kempld-core
- New Functionality
- Add support for USB Power Supply to axp20x
- Add support for Power Key to hi655x-pmic
- Fix-ups
- Update MAINTAINERS; Dialog, Altera
- Remove module support; max77843, max77620, max8998, max8997, max8925-i2c
- Add module support; max14577
- Constifying; max77620
- Allow bespoke IRQ masking/unmasking; max77620
- Remove superfluous code; arizona, qcom_rpm, smsc-ece1099
- Power Management fixups; arizona-core
- Error-path improvement; twl-core, dm355evm_msp, smsc-ece1099, hi655x
- Clocking fixups; twl6040
- Trivial (spelling, headers, coding-style, whitespace, (re)naming);
si476x-i2c, omap-usb-tll, ti_am335x_tscadc, tps6507, hi655x-pmic
- Bug Fixes
- Fix offset error for MSM8660; qcom_rpm
- Fix possible spurious IRQs; arizona, hi655x-pmic
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Merge tag 'mfd-for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"Core Framework:
- New API to call bespoke pre/post IRQ handlers; Regmap
New Device Support:
- Add support for RN5T567 to rn5t618
- Add support for COMe-cSL6 and COMe-mAL10 to kempld-core
New Functionality:
- Add support for USB Power Supply to axp20x
- Add support for Power Key to hi655x-pmic
Fix-ups:
- Update MAINTAINERS; Dialog, Altera
- Remove module support; max77843, max77620, max8998, max8997, max8925-i2c
- Add module support; max14577
- Constifying; max77620
- Allow bespoke IRQ masking/unmasking; max77620
- Remove superfluous code; arizona, qcom_rpm, smsc-ece1099
- Power Management fixups; arizona-core
- Error-path improvement; twl-core, dm355evm_msp, smsc-ece1099, hi655x
- Clocking fixups; twl6040
- Trivial (spelling, headers, coding-style, whitespace, (re)naming);
si476x-i2c, omap-usb-tll, ti_am335x_tscadc, tps6507, hi655x-pmic
Bug Fixes:
- Fix offset error for MSM8660; qcom_rpm
- Fix possible spurious IRQs; arizona, hi655x-pmic"
* tag 'mfd-for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (42 commits)
mfd: qcom_rpm: Parametrize also ack selector size
mfd: twl6040: Handle mclk used for HPPLL and optional internal clock source
mfd: Add support for COMe-cSL6 and COMe-mAL10 to Kontron PLD driver
mfd: hi655x: Fix return value check in hi655x_pmic_probe()
mfd: smsc-ece1099: Return directly after a function failure in smsc_i2c_probe()
mfd: smsc-ece1099: Delete an unnecessary variable initialisation in smsc_i2c_probe()
mfd: dm355evm_msp: Return directly after a failed platform_device_alloc() in add_child()
mfd: twl-core: Refactoring for add_numbered_child()
mfd: twl-core: Return directly after a failed platform_device_alloc() in add_numbered_child()
mfd: arizona: Add missing disable of PM runtime on probe error path
mfd: stmpe: Move platform data into MFD driver
mfd: max14577: Allow driver to be built as a module
mfd: max14577: Use module_init() instead of subsys_initcall()
mfd: arizona: Remove some duplicate defines
mfd: qcom_rpm: Remove unused define
mfd: hi655x-pmic: Add powerkey device to hi655x PMIC driver
mfd: hi655x-pmic: Rename some interrupt macro names
mfd: hi655x-pmic: Fixup issue with un-acked interrupts
mfd: arizona: Check if AOD interrupts are pending before dispatching
mfd: qcom_rpm: Fix offset error for msm8660
...
In the updates:
* Big endian support and preparation for defered probing for the
Exynos IOMMU driver
* Simplifications in iommu-group id handling
* Support for Mediatek generation one IOMMU hardware
* Conversion of the AMD IOMMU driver to use the generic IOVA
allocator. This driver now also benefits from the recent
scalability improvements in the IOVA code.
* Preparations to use generic DMA mapping code in the Rockchip
IOMMU driver
* Device tree adaption and conversion to use generic page-table
code for the MSM IOMMU driver
* An iova_to_phys optimization in the ARM-SMMU driver to greatly
improve page-table teardown performance with VFIO
* Various other small fixes and conversions
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Merge tag 'iommu-updates-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
- big-endian support and preparation for defered probing for the Exynos
IOMMU driver
- simplifications in iommu-group id handling
- support for Mediatek generation one IOMMU hardware
- conversion of the AMD IOMMU driver to use the generic IOVA allocator.
This driver now also benefits from the recent scalability
improvements in the IOVA code.
- preparations to use generic DMA mapping code in the Rockchip IOMMU
driver
- device tree adaption and conversion to use generic page-table code
for the MSM IOMMU driver
- an iova_to_phys optimization in the ARM-SMMU driver to greatly
improve page-table teardown performance with VFIO
- various other small fixes and conversions
* tag 'iommu-updates-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (59 commits)
iommu/amd: Initialize dma-ops domains with 3-level page-table
iommu/amd: Update Alias-DTE in update_device_table()
iommu/vt-d: Return error code in domain_context_mapping_one()
iommu/amd: Use container_of to get dma_ops_domain
iommu/amd: Flush iova queue before releasing dma_ops_domain
iommu/amd: Handle IOMMU_DOMAIN_DMA in ops->domain_free call-back
iommu/amd: Use dev_data->domain in get_domain()
iommu/amd: Optimize map_sg and unmap_sg
iommu/amd: Introduce dir2prot() helper
iommu/amd: Implement timeout to flush unmap queues
iommu/amd: Implement flush queue
iommu/amd: Allow NULL pointer parameter for domain_flush_complete()
iommu/amd: Set up data structures for flush queue
iommu/amd: Remove align-parameter from __map_single()
iommu/amd: Remove other remains of old address allocator
iommu/amd: Make use of the generic IOVA allocator
iommu/amd: Remove special mapping code for dma_ops path
iommu/amd: Pass gfp-flags to iommu_map_page()
iommu/amd: Implement apply_dm_region call-back
iommu/amd: Create a list of reserved iova addresses
...
Pull mailbox updates from Jussi Brar:
"Broadcom:
- New PDC controller driver and bindings
Misc:
- PL320 - Convert from 'raw' IO to 'relaxed' version
- Test - fix dangling pointer"
* 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
mailbox: Fix format and type mismatches in Broadcom PDC driver
mailbox: Add Broadcom PDC mailbox driver
dt-bindings: add bindings documentation for PDC driver.
mailbox: pl320: remove __raw IO
mailbox: mailbox-test: set tdev->signal to NULL after freeing
- A couple of changes to improve the support for erase/discard/trim cmds
- Add eMMC HS400 enhanced strobe support
- Show OCR and DSR registers in SYSFS for MMC/SD cards
- Correct and improve busy detection logic for MMC switch (CMD6) cmds
- Disable HPI cmds for certain broken Hynix eMMC cards
- Allow MMC hosts to specify non-support for SD and MMC cmds
- Some minor additional fixes
MMC host:
- sdhci: Re-works, fixes and clean-ups
- sdhci: Add HW auto re-tuning support
- sdhci: Re-factor code to prepare for adding support for eMMC CMDQ
- sdhci-esdhc-imx: Fixes and clean-ups
- sdhci-esdhc-imx: Update system PM support
- sdhci-esdhc-imx: Enable HW auto re-tuning
- sdhci-bcm2835: Remove driver as sdhci-iproc is used instead
- sdhci-brcmstb: Add new driver for Broadcom BRCMSTB SoCs
- sdhci-msm: Add support for UHS cards
- sdhci-tegra: Improve support for UHS cards
- sdhci-of-arasan: Update phy support for Rockchip SoCs
- sdhci-of-arasan: Deploy enhanced strobe support
- dw_mmc: Some fixes and clean-ups
- dw_mmc: Enable support for erase/discard/trim cmds
- dw_mmc: Enable CMD23 support
- mediatek: Some fixes related to the eMMC HS400 support
- sh_mmcif: Improve support for HW busy detection
- rtsx_pci: Enable support for erase/discard/trim cmds
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Merge tag 'mmc-v4.8' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC updates from Ulf Hansson:
"MMC core:
- A couple of changes to improve the support for erase/discard/trim cmds
- Add eMMC HS400 enhanced strobe support
- Show OCR and DSR registers in SYSFS for MMC/SD cards
- Correct and improve busy detection logic for MMC switch (CMD6) cmds
- Disable HPI cmds for certain broken Hynix eMMC cards
- Allow MMC hosts to specify non-support for SD and MMC cmds
- Some minor additional fixes
MMC host:
- sdhci: Re-works, fixes and clean-ups
- sdhci: Add HW auto re-tuning support
- sdhci: Re-factor code to prepare for adding support for eMMC CMDQ
- sdhci-esdhc-imx: Fixes and clean-ups
- sdhci-esdhc-imx: Update system PM support
- sdhci-esdhc-imx: Enable HW auto re-tuning
- sdhci-bcm2835: Remove driver as sdhci-iproc is used instead
- sdhci-brcmstb: Add new driver for Broadcom BRCMSTB SoCs
- sdhci-msm: Add support for UHS cards
- sdhci-tegra: Improve support for UHS cards
- sdhci-of-arasan: Update phy support for Rockchip SoCs
- sdhci-of-arasan: Deploy enhanced strobe support
- dw_mmc: Some fixes and clean-ups
- dw_mmc: Enable support for erase/discard/trim cmds
- dw_mmc: Enable CMD23 support
- mediatek: Some fixes related to the eMMC HS400 support
- sh_mmcif: Improve support for HW busy detection
- rtsx_pci: Enable support for erase/discard/trim cmds"
* tag 'mmc-v4.8' of git://git.linaro.org/people/ulf.hansson/mmc: (135 commits)
mmc: rtsx_pci: Remove deprecated create_singlethread_workqueue
mmc: rtsx_pci: Enable MMC_CAP_ERASE to allow erase/discard/trim requests
mmc: rtsx_pci: Use the provided busy timeout from the mmc core
mmc: sdhci-pltfm: Drop define for SDHCI_PLTFM_PMOPS
mmc: sdhci-pltfm: Convert to use the SET_SYSTEM_SLEEP_PM_OPS
mmc: sdhci-pltfm: Make sdhci_pltfm_suspend|resume() static
mmc: sdhci-esdhc-imx: Use common sdhci_suspend|resume_host()
mmc: sdhci-esdhc-imx: Assign system PM ops within #ifdef CONFIG_PM_SLEEP
mmc: sdhci-sirf: Remove non needed #ifdef CONFIG_PM* for dev_pm_ops
mmc: sdhci-s3c: Remove non needed #ifdef CONFIG_PM for dev_pm_ops
mmc: sdhci-pxav3: Remove non needed #ifdef CONFIG_PM for dev_pm_ops
mmc: sdhci-of-esdhc: Simplify code by using SIMPLE_DEV_PM_OPS
mmc: sdhci-acpi: Simplify code by using SET_SYSTEM_SLEEP_PM_OPS
mmc: sdhci-pci-core: Simplify code by using SET_SYSTEM_SLEEP_PM_OPS
mmc: Change the max discard sectors and erase response when HW busy detect
phy: rockchip-emmc: Wait even longer for the DLL to lock
phy: rockchip-emmc: Be tolerant to card clock of 0 in power on
mmc: sdhci-of-arasan: Revert: Always power the PHY off/on when clock changes
mmc: sdhci-msm: Add support for UHS cards
mmc: sdhci-msm: Add set_uhs_signaling() implementation
...
Pull watchdog updates from Wim Van Sebroeck:
"Core:
- min and max timeout improvements, WDOG_HW_RUNNING improvements,
status funtionality
- Add a device managed API for watchdog_register_device()
New watchdog drivers:
- Aspeed SoCs
- Maxim PMIC MAX77620
- Amlogic Meson GXBB SoC
Enhancements:
- support for the r8a7796 watchdog device
- support for F81866 watchdog device
- support for 5th variation of Apollo Lake
- support for MCP78S chipset
- clean-up of softdog.c watchdog device driver
- pic32-wdt and pic32-dmt fixes
- Documentation/watchdog: watchdog-test improvements
- several other fixes and improvements"
* git://www.linux-watchdog.org/linux-watchdog: (50 commits)
watchdog: gpio_wdt: Fix missing platform_set_drvdata() in gpio_wdt_probe()
watchdog: core: Clear WDOG_HW_RUNNING before calling the stop function
watchdog: core: Fix error handling of watchdog_dev_init()
watchdog: pic32-wdt: Fix return value check in pic32_wdt_drv_probe()
watchdog: pic32-dmt: Remove .owner field for driver
watchdog: pic32-wdt: Remove .owner field for driver
watchdog: renesas-wdt: Add support for the r8a7796 wdt
Documentation/watchdog: check return value for magic close
watchdog: sbsa: Drop status function
watchdog: Implement status function in watchdog core
watchdog: tangox: Set max_hw_heartbeat_ms instead of max_timeout
watchdog: change watchdog_need_worker logic
watchdog: add support for MCP78S chipset in nv_tco
watchdog: bcm2835_wdt: remove redundant ->set_timeout callback
watchdog: bcm2835_wdt: constify _ops and _info structures
dt-bindings: watchdog: Add Meson GXBB Watchdog bindings
watchdog: Add Meson GXBB Watchdog Driver
watchdog: qcom: configure BARK time in addition to BITE time
watchdog: qcom: add option for standalone watchdog not in timer block
watchdog: qcom: update device tree bindings
...
Pull btrfs updates from Chris Mason:
"This pull is dedicated to Josef's enospc rework, which we've been
testing for a few releases now. It fixes some early enospc problems
and is dramatically faster.
This also includes an updated fix for the delalloc accounting that
happens after a fault in copy_from_user. My patch in v4.7 was almost
but not quite enough"
* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix delalloc accounting after copy_from_user faults
Btrfs: avoid deadlocks during reservations in btrfs_truncate_block
Btrfs: use FLUSH_LIMIT for relocation in reserve_metadata_bytes
Btrfs: fill relocation block rsv after allocation
Btrfs: always use trans->block_rsv for orphans
Btrfs: change how we calculate the global block rsv
Btrfs: use root when checking need_async_flush
Btrfs: don't bother kicking async if there's nothing to reclaim
Btrfs: fix release reserved extents trace points
Btrfs: add fsid to some tracepoints
Btrfs: add tracepoints for flush events
Btrfs: fix delalloc reservation amount tracepoint
Btrfs: trace pinned extents
Btrfs: introduce ticketed enospc infrastructure
Btrfs: add tracepoint for adding block groups
Btrfs: warn_on for unaccounted spaces
Btrfs: change delayed reservation fallback behavior
Btrfs: always reserve metadata for delalloc extents
Btrfs: fix callers of btrfs_block_rsv_migrate
Btrfs: add bytes_readonly to the spaceinfo at once
According to the datasheet we have to set some bits as 0 and others as 1.
Make sure we do this for CFG1 and CFG3.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
The "name" variable's memory is now freed when the device is destructed
thanks to devm function.
Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: e0f8a24e0e ("staging:iio::hwmon interface client driver.")
Fixes: 61bb53bcbd ("hwmon: (iio_hwmon) Add support for humidity sensors")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Using set_bit() to set a bit in an integer is not a good idea, since
the function expects an unsigned long as argument, which can be 64 bit
wide. Coverity reports this problem as
>>> CID 1364488: Memory - illegal accesses (INCOMPATIBLE_CAST)
>>> Pointer "&ret" points to an object whose effective type is "int"
>>> (32 bits, signed) but is dereferenced as a wider "unsigned
+long" (64 bits, unsigned). This may lead to memory corruption.
245 set_bit(1, (unsigned long *)&ret);
Just use BIT instead.
Cc: Thilo Cestonaro <thilo@cestona.ro>
Fixes: 08426eda58 ("hwmon: Add driver for FTS BMC chip "Teutates"")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Replace devm_add_action() with devm_add_action_or_reset(),
and check its return value.
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Handling the wraparound requires the data->last_update to be set to an
initial jiffies value. Otherwise on 32-bit systems you will not be able
to request a reading till the 5 minute jiffies rollover happens.
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: David Frey <david.frey@sensirion.com>
Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Fixes: 7c84f7f80d ("hwmon: add support for Sensirion SHT3x sensors")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This fixes the same issue Steven already fixed for x86
in following commit:
237d28db03 ftrace/jprobes/x86: Fix conflict between jprobes and function graph tracing
It fixes the crash, that happens when function graph tracing
and jprobes are used simultaneously. Please refer to above
commit for details.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
AT_VECTOR_SIZE_ARCH should be defined with the maximum number of
NEW_AUX_ENT entries that ARCH_DLINFO can contain, but it wasn't defined
for s390 at all even though ARCH_DLINFO can contain one NEW_AUX_ENT when
VDSO is enabled.
This shouldn't be a problem as AT_VECTOR_SIZE_BASE includes space for
AT_BASE_PLATFORM which s390 doesn't use, but lets define it now and add
the comment above ARCH_DLINFO as found in several other architectures to
remind future modifiers of ARCH_DLINFO to keep AT_VECTOR_SIZE_ARCH up to
date.
Fixes: b020632e40 ("[S390] introduce vdso on s390")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
ap_configuration is malloced in ap_module_init() and should be freed
before leaving from the error handling cases, otherwise it may cause
memory leak.
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Make sure that only those nodes appear in the node_possible_map that
may actually be used. Usually that means that the node online and
possible maps are identical. For mode "plain" we only have one node,
for mode "emu" we have "emu_nodes" nodes.
Before this the possible map included (with default config) 16 nodes
while usually only one was used. That made a couple of loops that
iterated over all possible nodes do more work than necessary.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Fix this one when gcov is enabled:
arch/s390/kernel/als.o:(.data+0x118): undefined reference to `__gcov_merge_add'
arch/s390/kernel/als.o: In function `_GLOBAL__sub_I_65535_0_verify_facilities':
(.text.startup+0x8): undefined reference to `__gcov_init'
Please merge with "s390/als: convert architecture level set code to C".
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The architecture level set code has been converted to C and doesn't
need a define to figure out array sizes. Since the old code was the
only user of the DWORDS define, we can get rid of it again.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
If the kernel needs more facilities to run than the machine provides
it is running on, print the facility bit numbers which are missing.
This allows to easily tell what went wrong and if simply the machine
does not provide a required facility or if either the kernel or the
hypervisor may have a bug.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
If we have a facility mismatch the kernel only emits a warning that
the processor is not recent enough and stops operating. This doesn't
give us a lot of an idea of what actually went wrong.
As a first step print the machine type in addition.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
There is no reason to have this code in assembly language. Therefore
convert it to C.
Note that this code needs special treatment: it is called very early
and one of the side effects is that e.g. the bss section is not
cleared. Therefore the preferred way for static variables is to put
them on the stack which has a size of 16KB.
There is no functional change with this patch.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The early sclp code may be called before the bss section is
cleared. Therefore move all variables to the data section.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The device suspend call triggers all ap devices to fetch potentially
available response messages from the queues. Therefore the
corresponding zcrypt device, that is allocated asynchronously after
ap device probing, needs to be fully prepared. This race condition
could lead to uninitialized response buffers while trying to read
from the queues.
Introduce a new callback within the ap layer to get noticed when a
zcrypt device is fully prepared. Additional checks prevent reading
from devices that are not fully prepared.
Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
We store requests for channel path configure operations in an array but
maintain an additional cfg_busy variable (indicating if we have requests
stored in said array). When 2 tasks request a channel path configure
operation cfg_busy could be set to 0 even if we still have unprocessed
requests. This would lead to the second task being woken up although its
request was not processed yet.
Fix that by getting rid of cfg_busy and use the chp_cfg_task array
in the wake up condition.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
cfg_lock is never held long and we don't want to sleep while the
lock is being held. Thus it can be converted to a simple spinlock.
In addition we can now use the lock during the evaluation of a
wake_up condition.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The hugetlbfs pte<->pmd conversion functions currently assume that the pmd
bit layout is consistent with the pte layout, which is not really true.
The SW read and write bits are encoded as the sequence "wr" in a pte, but
in a pmd it is "rw". The hugetlbfs conversion assumes that the sequence
is identical in both cases, which results in swapped read and write bits
in the pmd. In practice this is not a problem, because those pmd bits are
only relevant for THP pmds and not for hugetlbfs pmds. The hugetlbfs code
works on (fake) ptes, and the converted pte bits are correct.
There is another variation in pte/pmd encoding which affects dirty
prot-none ptes/pmds. In this case, a pmd has both its HW read-only and
invalid bit set, while it is only the invalid bit for a pte. This also has
no effect in practice, but it should better be consistent.
This patch fixes both inconsistencies by changing the SW read/write bit
layout for pmds as well as the PAGE_NONE encoding for ptes. It also makes
the hugetlbfs conversion functions more robust by introducing a
move_set_bit() macro that uses the pte/pmd bit #defines instead of
constant shifts.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Majority of this update is about ASoC, including a few new drivers,
and the rest are mostly minor changes. The only substantial change in
ALSA core is about the additional error handling in the
compress-offload API. Below are highlights:
- Add the error propagating support in compress-offload API
- HD-audio: a usual Dell headset fixup, an Intel HDMI/DP fix, and the
default mixer setup change ot turn off the loopback
- Lots of updates for ASoC Intel drivers, mostly board support and bug
fixing, and to the NAU8825 driver
- Work on generalizing bits of simple-card to allow more code sharing
with the Renesas rsrc-card (which can't use simple-card due to DPCM)
- Removal of the Odroid X2 driver due to replacement with simple-card
- Support for several new Mediatek platforms and associated boards
- New ASoC drivers for Allwinner A10, Analog Devices ADAU7002, Broadcom
Cygnus, Cirrus Logic CS35L33 and CS53L30, Maxim MAX8960 and MAX98504,
Realtek RT5514 and Wolfson WM8758
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Merge tag 'sound-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound updates from Takashi Iwai:
"The majority of this update is about ASoC, including a few new
drivers, and the rest are mostly minor changes. The only substantial
change in ALSA core is about the additional error handling in the
compress-offload API. Below are highlights:
- Add the error propagating support in compress-offload API
- HD-audio: a usual Dell headset fixup, an Intel HDMI/DP fix, and the
default mixer setup change ot turn off the loopback
- Lots of updates for ASoC Intel drivers, mostly board support and
bug fixing, and to the NAU8825 driver
- Work on generalizing bits of simple-card to allow more code sharing
with the Renesas rsrc-card (which can't use simple-card due to DPCM)
- Removal of the Odroid X2 driver due to replacement with simple-card
- Support for several new Mediatek platforms and associated boards
- New ASoC drivers for Allwinner A10, Analog Devices ADAU7002,
Broadcom Cygnus, Cirrus Logic CS35L33 and CS53L30, Maxim MAX8960
and MAX98504, Realtek RT5514 and Wolfson WM8758"
* tag 'sound-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (278 commits)
sound: oss: Use kernel_read_file_from_path() for mod_firmware_load()
ASoC: Intel: Skylake: Delete an unnecessary check before the function call "release_firmware"
ASoC: Intel: Skylake: Fix NULL Pointer exception in dynamic_debug.
ASoC: samsung: Specify DMA channels through struct snd_dmaengine_pcm_config
ASoC: samsung: Fix error paths in the I2S driver's probe()
ASoC: cs53l30: Fix bit shift issue of TDM mode
ASoC: cs53l30: Fix a bug for TDM slot location validation
ASoC: rockchip: correct the spdif clk
ALSA: echoaudio: purge contradictions between dimension matrix members and total number of members
ASoC: rsrc-card: use asoc_simple_card_parse_card_name()
ASoC: rsrc-card: use asoc_simple_dai instead of rsrc_card_dai
ASoC: rsrc-card: use asoc_simple_card_parse_dailink_name()
ASoC: simple-card: use asoc_simple_card_parse_card_name()
ASoC: simple-card-utils: add asoc_simple_card_parse_card_name()
ASoC: simple-card: use asoc_simple_card_parse_dailink_name()
ASoC: simple-card-utils: add asoc_simple_card_set_dailink_name()
ASoC: nau8825: drop redundant idiom when converting integer to boolean
ASoC: nau8825: jack connection decision with different insertion logic
ASoC: mediatek: Add HDMI dai-links to the mt8173-rt5650 machine driver
ASoC: mediatek: mt2701: fix non static symbol warning
...
Highlights:
- PowerNV PCI hotplug support.
- Lots more Power9 support.
- eBPF JIT support on ppc64le.
- Lots of cxl updates.
- Boot code consolidation.
Bug fixes:
- Fix spin_unlock_wait() from Boqun Feng
- Fix stack pointer corruption in __tm_recheckpoint() from Michael Neuling
- Fix multiple bugs in memory_hotplug_max() from Bharata B Rao
- mm: Ensure "special" zones are empty from Oliver O'Halloran
- ftrace: Separate the heuristics for checking call sites from Michael Ellerman
- modules: Never restore r2 for a mprofile-kernel style mcount() call from Michael Ellerman
- Fix endianness when reading TCEs from Alexey Kardashevskiy
- start rtasd before PCI probing from Greg Kurz
- PCI: rpaphp: Fix slot registration for multiple slots under a PHB from Tyrel Datwyler
- powerpc/mm: Add memory barrier in __hugepte_alloc() from Sukadev Bhattiprolu
Cleanups & fixes:
- Drop support for MPIC in pseries from Rashmica Gupta
- Define and use PPC64_ELF_ABI_v2/v1 from Michael Ellerman
- Remove unused symbols in asm-offsets.c from Rashmica Gupta
- Fix SRIOV not building without EEH enabled from Russell Currey
- Remove kretprobe_trampoline_holder. from Thiago Jung Bauermann
- Reduce log level of PCI I/O space warning from Benjamin Herrenschmidt
- Add array bounds checking to crash_shutdown_handlers from Suraj Jitindar Singh
- Avoid -maltivec when using clang integrated assembler from Anton Blanchard
- Fix array overrun in ppc_rtas() syscall from Andrew Donnellan
- Fix error return value in cmm_mem_going_offline() from Rasmus Villemoes
- export cpu_to_core_id() from Mauricio Faria de Oliveira
- Remove old symbols from defconfigs from Andrew Donnellan
- Update obsolete comments in setup_32.c about entry conditions from Benjamin Herrenschmidt
- Add comment explaining the purpose of setup_kdump_trampoline() from Benjamin Herrenschmidt
- Merge the RELOCATABLE config entries for ppc32 and ppc64 from Kevin Hao
- Remove RELOCATABLE_PPC32 from Kevin Hao
- Fix .long's in tlb-radix.c to more meaningful from Balbir Singh
Minor cleanups & fixes:
- Andrew Donnellan, Anna-Maria Gleixner, Anton Blanchard, Benjamin
Herrenschmidt, Bharata B Rao, Christophe Leroy, Colin Ian King, Geliang
Tang, Greg Kurz, Madhavan Srinivasan, Michael Ellerman, Michael Ellerman,
Stephen Rothwell, Stewart Smith.
Freescale updates from Scott:
- "Highlights include more 8xx optimizations, device tree updates,
and MVME7100 support."
PowerNV PCI hotplug from Gavin Shan:
- PCI: Add pcibios_setup_bridge()
- Override pcibios_setup_bridge()
- Remove PCI_RESET_DELAY_US
- Move pnv_pci_ioda_setup_opal_tce_kill() around
- Increase PE# capacity
- Allocate PE# in reverse order
- Create PEs in pcibios_setup_bridge()
- Setup PE for root bus
- Extend PCI bridge resources
- Make pnv_ioda_deconfigure_pe() visible
- Dynamically release PE
- Update bridge windows on PCI plug
- Delay populating pdn
- Support PCI slot ID
- Use PCI slot reset infrastructure
- Introduce pnv_pci_get_slot_id()
- Functions to get/set PCI slot state
- PCI/hotplug: PowerPC PowerNV PCI hotplug driver
- Print correct PHB type names
Power9 idle support from Shreyas B. Prabhu:
- set power_save func after the idle states are initialized
- Use PNV_THREAD_WINKLE macro while requesting for winkle
- make hypervisor state restore a function
- Rename idle_power7.S to idle_book3s.S
- Rename reusable idle functions to hardware agnostic names
- Make pnv_powersave_common more generic
- abstraction for saving SPRs before entering deep idle states
- Add platform support for stop instruction
- cpuidle/powernv: Use CPUIDLE_STATE_MAX instead of MAX_POWERNV_IDLE_STATES
- cpuidle/powernv: cleanup cpuidle-powernv.c
- cpuidle/powernv: Add support for POWER ISA v3 idle states
- Use deepest stop state when cpu is offlined
Power9 PMU from Madhavan Srinivasan:
- factor out power8 pmu macros and defines
- factor out power8 pmu functions
- factor out power8 __init_pmu code
- Add power9 event list macros for generic and cache events
- Power9 PMU support
- Export Power9 generic and cache events to sysfs
Power9 preliminary interrupt & PCI support from Benjamin Herrenschmidt:
- Add XICS emulation APIs
- Move a few exception common handlers to make room
- Add support for HV virtualization interrupts
- Add mechanism to force a replay of interrupts
- Add ICP OPAL backend
- Discover IODA3 PHBs
- pci: Remove obsolete SW invalidate
- opal: Add real mode call wrappers
- Rename TCE invalidation calls
- Remove SWINV constants and obsolete TCE code
- Rework accessing the TCE invalidate register
- Fallback to OPAL for TCE invalidations
- Use the device-tree to get available range of M64's
- Check status of a PHB before using it
- pci: Don't try to allocate resources that will be reassigned
Other Power9:
- Send SIGBUS on unaligned copy and paste from Chris Smart
- Large Decrementer support from Oliver O'Halloran
- Load Monitor Register Support from Jack Miller
Performance improvements from Anton Blanchard:
- Avoid load hit store in __giveup_fpu() and __giveup_altivec()
- Avoid load hit store in setup_sigcontext()
- Remove assembly versions of strcpy, strcat, strlen and strcmp
- Align hot loops of some string functions
eBPF JIT from Naveen N. Rao:
- Fix/enhance 32-bit Load Immediate implementation
- Optimize 64-bit Immediate loads
- Introduce rotate immediate instructions
- A few cleanups
- Isolate classic BPF JIT specifics into a separate header
- Implement JIT compiler for extended BPF
Operator Panel driver from Suraj Jitindar Singh:
- devicetree/bindings: Add binding for operator panel on FSP machines
- Add inline function to get rc from an ASYNC_COMP opal_msg
- Add driver for operator panel on FSP machines
Sparse fixes from Daniel Axtens:
- make some things static
- Introduce asm-prototypes.h
- Include headers containing prototypes
- Use #ifdef __BIG_ENDIAN__ #else for REG_BYTE
- kvm: Clarify __user annotations
- Pass endianness to sparse
- Make ppc_md.{halt, restart} __noreturn
MM fixes & cleanups from Aneesh Kumar K.V:
- radix: Update LPCR HR bit as per ISA
- use _raw variant of page table accessors
- Compile out radix related functions if RADIX_MMU is disabled
- Clear top 16 bits of va only on older cpus
- Print formation regarding the the MMU mode
- hash: Update SDR1 size encoding as documented in ISA 3.0
- radix: Update PID switch sequence
- radix: Update machine call back to support new HCALL.
- radix: Add LPID based tlb flush helpers
- radix: Add a kernel command line to disable radix
- Cleanup LPCR defines
Boot code consolidation from Benjamin Herrenschmidt:
- Move epapr_paravirt_early_init() to early_init_devtree()
- cell: Don't use flat device-tree after boot
- ge_imp3a: Don't use the flat device-tree after boot
- mpc85xx_ds: Don't use the flat device-tree after boot
- mpc85xx_rdb: Don't use the flat device-tree after boot
- Don't test for machine type in rtas_initialize()
- Don't test for machine type in smp_setup_cpu_maps()
- dt: Add of_device_compatible_match()
- Factor do_feature_fixup calls
- Move 64-bit feature fixup earlier
- Move 64-bit memory reserves to setup_arch()
- Use a cachable DART
- Move FW feature probing out of pseries probe()
- Put exception configuration in a common place
- Remove early allocation of the SMU command buffer
- Move MMU backend selection out of platform code
- pasemi: Remove IOBMAP allocation from platform probe()
- mm/hash: Don't use machine_is() early during boot
- Don't test for machine type to detect HEA special case
- pmac: Remove spurrious machine type test
- Move hash table ops to a separate structure
- Ensure that ppc_md is empty before probing for machine type
- Move 64-bit probe_machine() to later in the boot process
- Move 32-bit probe() machine to later in the boot process
- Get rid of ppc_md.init_early()
- Move the boot time info banner to a separate function
- Move setting of {i,d}cache_bsize to initialize_cache_info()
- Move the content of setup_system() to setup_arch()
- Move cache info inits to a separate function
- Re-order the call to smp_setup_cpu_maps()
- Re-order setup_panic()
- Make a few boot functions __init
- Merge 32-bit and 64-bit setup_arch()
Other new features:
- tty/hvc: Use IRQF_SHARED for OPAL hvc consoles from Sam Mendoza-Jonas
- tty/hvc: Use opal irqchip interface if available from Sam Mendoza-Jonas
- powerpc: Add module autoloading based on CPU features from Alastair D'Silva
- crypto: vmx - Convert to CPU feature based module autoloading from Alastair D'Silva
- Wake up kopald polling thread before waiting for events from Benjamin Herrenschmidt
- xmon: Dump ISA 2.06 SPRs from Michael Ellerman
- xmon: Dump ISA 2.07 SPRs from Michael Ellerman
- Add a parameter to disable 1TB segs from Oliver O'Halloran
- powerpc/boot: Add OPAL console to epapr wrappers from Oliver O'Halloran
- Assign fixed PHB number based on device-tree properties from Guilherme G. Piccoli
- pseries: Add pseries hotplug workqueue from John Allen
- pseries: Add support for hotplug interrupt source from John Allen
- pseries: Use kernel hotplug queue for PowerVM hotplug events from John Allen
- pseries: Move property cloning into its own routine from Nathan Fontenot
- pseries: Dynamic add entires to associativity lookup array from Nathan Fontenot
- pseries: Auto-online hotplugged memory from Nathan Fontenot
- pseries: Remove call to memblock_add() from Nathan Fontenot
cxl:
- Add set and get private data to context struct from Michael Neuling
- make base more explicitly non-modular from Paul Gortmaker
- Use for_each_compatible_node() macro from Wei Yongjun
- Frederic Barrat
- Abstract the differences between the PSL and XSL
- Make vPHB device node match adapter's
- Philippe Bergheaud
- Add mechanism for delivering AFU driver specific events
- Ignore CAPI adapters misplaced in switched slots
- Refine slice error debug messages
- Andrew Donnellan
- static-ify variables to fix sparse warnings
- PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl
- PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state
- Add cxl_check_and_switch_mode() API to switch bi-modal cards
- remove dead Kconfig options
- fix potential NULL dereference in free_adapter()
- Ian Munsie
- Update process element after allocating interrupts
- Add support for CAPP DMA mode
- Fix allowing bogus AFU descriptors with 0 maximum processes
- Fix allocating a minimum of 2 pages for the SPA
- Fix bug where AFU disable operation had no effect
- Workaround XSL bug that does not clear the RA bit after a reset
- Fix NULL pointer dereference on kernel contexts with no AFU interrupts
- powerpc/powernv: Split cxl code out into a separate file
- Add cxl_slot_is_supported API
- Enable bus mastering for devices using CAPP DMA mode
- Move cxl_afu_get / cxl_afu_put to base
- Allow a default context to be associated with an external pci_dev
- Do not create vPHB if there are no AFU configuration records
- powerpc/powernv: Add support for the cxl kernel api on the real phb
- Add support for using the kernel API with a real PHB
- Add kernel APIs to get & set the max irqs per context
- Add preliminary workaround for CX4 interrupt limitation
- Add support for interrupts on the Mellanox CX4
- Workaround PE=0 hardware limitation in Mellanox CX4
- powerpc/powernv: Fix pci-cxl.c build when CONFIG_MODULES=n
selftests:
- Test unaligned copy and paste from Chris Smart
- Load Monitor Register Tests from Jack Miller
- Cyril Bur
- exec() with suspended transaction
- Use signed long to read perf_event_paranoid
- Fix usage message in context_switch
- Fix generation of vector instructions/types in context_switch
- Michael Ellerman
- Use "Delta" rather than "Error" in normal output
- Import Anton's mmap & futex micro benchmarks
- Add a test for PROT_SAO
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Merge tag 'powerpc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
"Highlights:
- PowerNV PCI hotplug support.
- Lots more Power9 support.
- eBPF JIT support on ppc64le.
- Lots of cxl updates.
- Boot code consolidation.
Bug fixes:
- Fix spin_unlock_wait() from Boqun Feng
- Fix stack pointer corruption in __tm_recheckpoint() from Michael
Neuling
- Fix multiple bugs in memory_hotplug_max() from Bharata B Rao
- mm: Ensure "special" zones are empty from Oliver O'Halloran
- ftrace: Separate the heuristics for checking call sites from
Michael Ellerman
- modules: Never restore r2 for a mprofile-kernel style mcount() call
from Michael Ellerman
- Fix endianness when reading TCEs from Alexey Kardashevskiy
- start rtasd before PCI probing from Greg Kurz
- PCI: rpaphp: Fix slot registration for multiple slots under a PHB
from Tyrel Datwyler
- powerpc/mm: Add memory barrier in __hugepte_alloc() from Sukadev
Bhattiprolu
Cleanups & fixes:
- Drop support for MPIC in pseries from Rashmica Gupta
- Define and use PPC64_ELF_ABI_v2/v1 from Michael Ellerman
- Remove unused symbols in asm-offsets.c from Rashmica Gupta
- Fix SRIOV not building without EEH enabled from Russell Currey
- Remove kretprobe_trampoline_holder from Thiago Jung Bauermann
- Reduce log level of PCI I/O space warning from Benjamin
Herrenschmidt
- Add array bounds checking to crash_shutdown_handlers from Suraj
Jitindar Singh
- Avoid -maltivec when using clang integrated assembler from Anton
Blanchard
- Fix array overrun in ppc_rtas() syscall from Andrew Donnellan
- Fix error return value in cmm_mem_going_offline() from Rasmus
Villemoes
- export cpu_to_core_id() from Mauricio Faria de Oliveira
- Remove old symbols from defconfigs from Andrew Donnellan
- Update obsolete comments in setup_32.c about entry conditions from
Benjamin Herrenschmidt
- Add comment explaining the purpose of setup_kdump_trampoline() from
Benjamin Herrenschmidt
- Merge the RELOCATABLE config entries for ppc32 and ppc64 from Kevin
Hao
- Remove RELOCATABLE_PPC32 from Kevin Hao
- Fix .long's in tlb-radix.c to more meaningful from Balbir Singh
Minor cleanups & fixes:
- Andrew Donnellan, Anna-Maria Gleixner, Anton Blanchard, Benjamin
Herrenschmidt, Bharata B Rao, Christophe Leroy, Colin Ian King,
Geliang Tang, Greg Kurz, Madhavan Srinivasan, Michael Ellerman,
Michael Ellerman, Stephen Rothwell, Stewart Smith.
Freescale updates from Scott:
- "Highlights include more 8xx optimizations, device tree updates,
and MVME7100 support."
PowerNV PCI hotplug from Gavin Shan:
- PCI: Add pcibios_setup_bridge()
- Override pcibios_setup_bridge()
- Remove PCI_RESET_DELAY_US
- Move pnv_pci_ioda_setup_opal_tce_kill() around
- Increase PE# capacity
- Allocate PE# in reverse order
- Create PEs in pcibios_setup_bridge()
- Setup PE for root bus
- Extend PCI bridge resources
- Make pnv_ioda_deconfigure_pe() visible
- Dynamically release PE
- Update bridge windows on PCI plug
- Delay populating pdn
- Support PCI slot ID
- Use PCI slot reset infrastructure
- Introduce pnv_pci_get_slot_id()
- Functions to get/set PCI slot state
- PCI/hotplug: PowerPC PowerNV PCI hotplug driver
- Print correct PHB type names
Power9 idle support from Shreyas B. Prabhu:
- set power_save func after the idle states are initialized
- Use PNV_THREAD_WINKLE macro while requesting for winkle
- make hypervisor state restore a function
- Rename idle_power7.S to idle_book3s.S
- Rename reusable idle functions to hardware agnostic names
- Make pnv_powersave_common more generic
- abstraction for saving SPRs before entering deep idle states
- Add platform support for stop instruction
- cpuidle/powernv: Use CPUIDLE_STATE_MAX instead of MAX_POWERNV_IDLE_STATES
- cpuidle/powernv: cleanup cpuidle-powernv.c
- cpuidle/powernv: Add support for POWER ISA v3 idle states
- Use deepest stop state when cpu is offlined
Power9 PMU from Madhavan Srinivasan:
- factor out power8 pmu macros and defines
- factor out power8 pmu functions
- factor out power8 __init_pmu code
- Add power9 event list macros for generic and cache events
- Power9 PMU support
- Export Power9 generic and cache events to sysfs
Power9 preliminary interrupt & PCI support from Benjamin Herrenschmidt:
- Add XICS emulation APIs
- Move a few exception common handlers to make room
- Add support for HV virtualization interrupts
- Add mechanism to force a replay of interrupts
- Add ICP OPAL backend
- Discover IODA3 PHBs
- pci: Remove obsolete SW invalidate
- opal: Add real mode call wrappers
- Rename TCE invalidation calls
- Remove SWINV constants and obsolete TCE code
- Rework accessing the TCE invalidate register
- Fallback to OPAL for TCE invalidations
- Use the device-tree to get available range of M64's
- Check status of a PHB before using it
- pci: Don't try to allocate resources that will be reassigned
Other Power9:
- Send SIGBUS on unaligned copy and paste from Chris Smart
- Large Decrementer support from Oliver O'Halloran
- Load Monitor Register Support from Jack Miller
Performance improvements from Anton Blanchard:
- Avoid load hit store in __giveup_fpu() and __giveup_altivec()
- Avoid load hit store in setup_sigcontext()
- Remove assembly versions of strcpy, strcat, strlen and strcmp
- Align hot loops of some string functions
eBPF JIT from Naveen N. Rao:
- Fix/enhance 32-bit Load Immediate implementation
- Optimize 64-bit Immediate loads
- Introduce rotate immediate instructions
- A few cleanups
- Isolate classic BPF JIT specifics into a separate header
- Implement JIT compiler for extended BPF
Operator Panel driver from Suraj Jitindar Singh:
- devicetree/bindings: Add binding for operator panel on FSP machines
- Add inline function to get rc from an ASYNC_COMP opal_msg
- Add driver for operator panel on FSP machines
Sparse fixes from Daniel Axtens:
- make some things static
- Introduce asm-prototypes.h
- Include headers containing prototypes
- Use #ifdef __BIG_ENDIAN__ #else for REG_BYTE
- kvm: Clarify __user annotations
- Pass endianness to sparse
- Make ppc_md.{halt, restart} __noreturn
MM fixes & cleanups from Aneesh Kumar K.V:
- radix: Update LPCR HR bit as per ISA
- use _raw variant of page table accessors
- Compile out radix related functions if RADIX_MMU is disabled
- Clear top 16 bits of va only on older cpus
- Print formation regarding the the MMU mode
- hash: Update SDR1 size encoding as documented in ISA 3.0
- radix: Update PID switch sequence
- radix: Update machine call back to support new HCALL.
- radix: Add LPID based tlb flush helpers
- radix: Add a kernel command line to disable radix
- Cleanup LPCR defines
Boot code consolidation from Benjamin Herrenschmidt:
- Move epapr_paravirt_early_init() to early_init_devtree()
- cell: Don't use flat device-tree after boot
- ge_imp3a: Don't use the flat device-tree after boot
- mpc85xx_ds: Don't use the flat device-tree after boot
- mpc85xx_rdb: Don't use the flat device-tree after boot
- Don't test for machine type in rtas_initialize()
- Don't test for machine type in smp_setup_cpu_maps()
- dt: Add of_device_compatible_match()
- Factor do_feature_fixup calls
- Move 64-bit feature fixup earlier
- Move 64-bit memory reserves to setup_arch()
- Use a cachable DART
- Move FW feature probing out of pseries probe()
- Put exception configuration in a common place
- Remove early allocation of the SMU command buffer
- Move MMU backend selection out of platform code
- pasemi: Remove IOBMAP allocation from platform probe()
- mm/hash: Don't use machine_is() early during boot
- Don't test for machine type to detect HEA special case
- pmac: Remove spurrious machine type test
- Move hash table ops to a separate structure
- Ensure that ppc_md is empty before probing for machine type
- Move 64-bit probe_machine() to later in the boot process
- Move 32-bit probe() machine to later in the boot process
- Get rid of ppc_md.init_early()
- Move the boot time info banner to a separate function
- Move setting of {i,d}cache_bsize to initialize_cache_info()
- Move the content of setup_system() to setup_arch()
- Move cache info inits to a separate function
- Re-order the call to smp_setup_cpu_maps()
- Re-order setup_panic()
- Make a few boot functions __init
- Merge 32-bit and 64-bit setup_arch()
Other new features:
- tty/hvc: Use IRQF_SHARED for OPAL hvc consoles from Sam Mendoza-Jonas
- tty/hvc: Use opal irqchip interface if available from Sam Mendoza-Jonas
- powerpc: Add module autoloading based on CPU features from Alastair D'Silva
- crypto: vmx - Convert to CPU feature based module autoloading from Alastair D'Silva
- Wake up kopald polling thread before waiting for events from Benjamin Herrenschmidt
- xmon: Dump ISA 2.06 SPRs from Michael Ellerman
- xmon: Dump ISA 2.07 SPRs from Michael Ellerman
- Add a parameter to disable 1TB segs from Oliver O'Halloran
- powerpc/boot: Add OPAL console to epapr wrappers from Oliver O'Halloran
- Assign fixed PHB number based on device-tree properties from Guilherme G. Piccoli
- pseries: Add pseries hotplug workqueue from John Allen
- pseries: Add support for hotplug interrupt source from John Allen
- pseries: Use kernel hotplug queue for PowerVM hotplug events from John Allen
- pseries: Move property cloning into its own routine from Nathan Fontenot
- pseries: Dynamic add entires to associativity lookup array from Nathan Fontenot
- pseries: Auto-online hotplugged memory from Nathan Fontenot
- pseries: Remove call to memblock_add() from Nathan Fontenot
cxl:
- Add set and get private data to context struct from Michael Neuling
- make base more explicitly non-modular from Paul Gortmaker
- Use for_each_compatible_node() macro from Wei Yongjun
- Frederic Barrat
- Abstract the differences between the PSL and XSL
- Make vPHB device node match adapter's
- Philippe Bergheaud
- Add mechanism for delivering AFU driver specific events
- Ignore CAPI adapters misplaced in switched slots
- Refine slice error debug messages
- Andrew Donnellan
- static-ify variables to fix sparse warnings
- PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl
- PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state
- Add cxl_check_and_switch_mode() API to switch bi-modal cards
- remove dead Kconfig options
- fix potential NULL dereference in free_adapter()
- Ian Munsie
- Update process element after allocating interrupts
- Add support for CAPP DMA mode
- Fix allowing bogus AFU descriptors with 0 maximum processes
- Fix allocating a minimum of 2 pages for the SPA
- Fix bug where AFU disable operation had no effect
- Workaround XSL bug that does not clear the RA bit after a reset
- Fix NULL pointer dereference on kernel contexts with no AFU interrupts
- powerpc/powernv: Split cxl code out into a separate file
- Add cxl_slot_is_supported API
- Enable bus mastering for devices using CAPP DMA mode
- Move cxl_afu_get / cxl_afu_put to base
- Allow a default context to be associated with an external pci_dev
- Do not create vPHB if there are no AFU configuration records
- powerpc/powernv: Add support for the cxl kernel api on the real phb
- Add support for using the kernel API with a real PHB
- Add kernel APIs to get & set the max irqs per context
- Add preliminary workaround for CX4 interrupt limitation
- Add support for interrupts on the Mellanox CX4
- Workaround PE=0 hardware limitation in Mellanox CX4
- powerpc/powernv: Fix pci-cxl.c build when CONFIG_MODULES=n
selftests:
- Test unaligned copy and paste from Chris Smart
- Load Monitor Register Tests from Jack Miller
- Cyril Bur
- exec() with suspended transaction
- Use signed long to read perf_event_paranoid
- Fix usage message in context_switch
- Fix generation of vector instructions/types in context_switch
- Michael Ellerman
- Use "Delta" rather than "Error" in normal output
- Import Anton's mmap & futex micro benchmarks
- Add a test for PROT_SAO"
* tag 'powerpc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (263 commits)
powerpc/mm: Parenthesise IS_ENABLED() in if condition
tty/hvc: Use opal irqchip interface if available
tty/hvc: Use IRQF_SHARED for OPAL hvc consoles
selftests/powerpc: exec() with suspended transaction
powerpc: Improve comment explaining why we modify VRSAVE
powerpc/mm: Drop unused externs for hpte_init_beat[_v3]()
powerpc/mm: Rename hpte_init_lpar() and move the fallback to a header
powerpc/mm: Fix build break when PPC_NATIVE=n
crypto: vmx - Convert to CPU feature based module autoloading
powerpc: Add module autoloading based on CPU features
powerpc/powernv/ioda: Fix endianness when reading TCEs
powerpc/mm: Add memory barrier in __hugepte_alloc()
powerpc/modules: Never restore r2 for a mprofile-kernel style mcount() call
powerpc/ftrace: Separate the heuristics for checking call sites
powerpc: Merge 32-bit and 64-bit setup_arch()
powerpc/64: Make a few boot functions __init
powerpc: Re-order setup_panic()
powerpc: Re-order the call to smp_setup_cpu_maps()
powerpc/32: Move cache info inits to a separate function
powerpc/64: Move the content of setup_system() to setup_arch()
...
On a system with sparse node ids, eg. a powerpc system with 4 nodes
numbered like so:
node 0: [mem 0x0000000000000000-0x00000007ffffffff]
node 1: [mem 0x0000000800000000-0x0000000fffffffff]
node 16: [mem 0x0000001000000000-0x00000017ffffffff]
node 17: [mem 0x0000001800000000-0x0000001fffffffff]
The code in rand_initialize() will allocate 4 pointers for the pool
array, and initialise them correctly.
However when go to use the pool, in eg. extract_crng(), we use the
numa_node_id() to index into the array. For the higher numbered node ids
this leads to random memory corruption, depending on what was kmalloc'ed
adjacent to the pool array.
Fix it by using nr_node_ids to size the pool array.
Fixes: 1e7f583af6 ("random: make /dev/urandom scalable for silly userspace programs")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Highlights include:
Stable bugfixes:
- nfs: don't create zero-length requests
- Several LAYOUTGET bugfixes
Features:
- Several performance related features
- More aggressive caching when we can rely on close-to-open cache
consistency
- Remove serialisation of O_DIRECT reads and writes
- Optimise several code paths to not flush to disk unnecessarily. However
allow for the idiosyncracies of pNFS for those layout types that need
to issue a LAYOUTCOMMIT before the metadata can be updated on the server.
- SUNRPC updates to the client data receive path
- pNFS/SCSI support RH/Fedora dm-mpath device nodes
- pNFS files/flexfiles can now use unprivileged ports when the generic NFS
mount options allow it.
Bugfixes:
- Don't use RDMA direct data placement together with data integrity or
privacy security flavours
- Remove the RDMA ALLPHYSICAL memory registration mode as it has potential
security holes.
- Several layout recall fixes to improve NFSv4.1 protocol compliance.
- Fix an Oops in the pNFS files and flexfiles connection setup to the DS
- Allow retry of operations that used a returned delegation stateid
- Don't mark the inode as revalidated if a LAYOUTCOMMIT is outstanding
- Fix writeback races in nfs4_copy_range() and nfs42_proc_deallocate()
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Merge tag 'nfs-for-4.8-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Stable bugfixes:
- nfs: don't create zero-length requests
- several LAYOUTGET bugfixes
Features:
- several performance related features
- more aggressive caching when we can rely on close-to-open
cache consistency
- remove serialisation of O_DIRECT reads and writes
- optimise several code paths to not flush to disk unnecessarily.
However allow for the idiosyncracies of pNFS for those layout
types that need to issue a LAYOUTCOMMIT before the metadata can
be updated on the server.
- SUNRPC updates to the client data receive path
- pNFS/SCSI support RH/Fedora dm-mpath device nodes
- pNFS files/flexfiles can now use unprivileged ports when
the generic NFS mount options allow it.
Bugfixes:
- Don't use RDMA direct data placement together with data
integrity or privacy security flavours
- Remove the RDMA ALLPHYSICAL memory registration mode as
it has potential security holes.
- Several layout recall fixes to improve NFSv4.1 protocol
compliance.
- Fix an Oops in the pNFS files and flexfiles connection
setup to the DS
- Allow retry of operations that used a returned delegation
stateid
- Don't mark the inode as revalidated if a LAYOUTCOMMIT is
outstanding
- Fix writeback races in nfs4_copy_range() and
nfs42_proc_deallocate()"
* tag 'nfs-for-4.8-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (104 commits)
pNFS: Actively set attributes as invalid if LAYOUTCOMMIT is outstanding
NFSv4: Clean up lookup of SECINFO_NO_NAME
NFSv4.2: Fix warning "variable ‘stateids’ set but not used"
NFSv4: Fix warning "no previous prototype for ‘nfs4_listxattr’"
SUNRPC: Fix a compiler warning in fs/nfs/clnt.c
pNFS: Remove redundant smp_mb() from pnfs_init_lseg()
pNFS: Cleanup - do layout segment initialisation in one place
pNFS: Remove redundant stateid invalidation
pNFS: Remove redundant pnfs_mark_layout_returned_if_empty()
pNFS: Clear the layout metadata if the server changed the layout stateid
pNFS: Cleanup - don't open code pnfs_mark_layout_stateid_invalid()
NFS: pnfs_mark_matching_lsegs_return() should match the layout sequence id
pNFS: Do not set plh_return_seq for non-callback related layoutreturns
pNFS: Ensure layoutreturn acts as a completion for layout callbacks
pNFS: Fix CB_LAYOUTRECALL stateid verification
pNFS: Always update the layout barrier seqid on LAYOUTGET
pNFS: Always update the layout stateid if NFS_LAYOUT_INVALID_STID is set
pNFS: Clear the layout return tracking on layout reinitialisation
pNFS: LAYOUTRETURN should only update the stateid if the layout is valid
nfs: don't create zero-length requests
...
Pull x86 microcode updates from Thomas Gleixner:
- more work to make the microcode loader robust
- a fix for the micro code load precedence
- fixes for initrd loading with randomized memory
- less printk noise on SMP machines
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/asm, x86/microcode: Add __PAGE_OFFSET_BASE define on 32-bit
x86/microcode/intel: Fix initrd loading with CONFIG_RANDOMIZE_MEMORY=y
x86/microcode: Remove unused symbol exports
x86/microcode/intel: Do not issue microcode updates messages on each CPU
Documentation/microcode: Document some aspects for more clarity
x86/microcode/AMD: Make amd_ucode_patch[] static
x86/microcode/intel: Unexport save_mc_for_early()
x86/microcode/intel: Rename load_microcode_early() to find_microcode_patch()
x86/microcode: Propagate save_microcode_in_initrd() retval
x86/microcode: Get rid of find_cpio_data()'s dummy offset arg
lib/cpio: Make find_cpio_data()'s offset arg optional
x86/microcode: Fix suspend to RAM with builtin microcode
x86/microcode: Fix loading precedence
Pull x86 cpufeature updates from Thomas Gleixner:
- a workaround for the MONITOR instruction erratum of Goldmont CPUs
- small fixes and cleanups here and there
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Add workaround for MONITOR instruction erratum on Goldmont based CPUs
x86/cpu: Rename "WESTMERE2" family to "NEHALEM_G"
x86/amd_nb: Clean up init path
x86/cpufeature: Add helper macro for mask check macros
x86/cpufeature: Make sure DISABLED/REQUIRED macros are updated
x86/cpufeature: Update cpufeaure macros
Pull perf fixes from Thomas Gleixner:
"This update contains:
- a fix for the bpf tools to use the new EM_BPF code
- a fix for the module parser of perf to retrieve the
proper text start address
- add str_error_c to libapi to avoid linking against
tools/lib/str_error_r.o"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tools lib api: Add str_error_c to libapi
perf s390: Fix 'start' address of module's map
tools lib bpf: Use official ELF e_machine value
