the GPE dispatcher.
This facility can be used to prevent such uncontrolled
GPE floodings.
- Format: <byte>
+ Format: <byte> or <bitmap-list>
acpi_no_auto_serialize [HW,ACPI]
Disable auto-serialization of AML methods
allowed anymore to lift isolation
requirements as needed. This option
does not override iommu=pt
+ force_enable - Force enable the IOMMU on platforms known
+ to be buggy with IOMMU enabled. Use this
+ option with care.
amd_iommu_dump= [HW,X86-64]
Enable AMD IOMMU driver option to dump the ACPI table
ccw_timeout_log [S390]
See Documentation/s390/common_io.rst for details.
- cgroup_disable= [KNL] Disable a particular controller
- Format: {name of the controller(s) to disable}
+ cgroup_disable= [KNL] Disable a particular controller or optional feature
+ Format: {name of the controller(s) or feature(s) to disable}
The effects of cgroup_disable=foo are:
- foo isn't auto-mounted if you mount all cgroups in
a single hierarchy
- foo isn't visible as an individually mountable
subsystem
+ - if foo is an optional feature then the feature is
+ disabled and corresponding cgroup files are not
+ created
{Currently only "memory" controller deal with this and
cut the overhead, others just disable the usage. So
only cgroup_disable=memory is actually worthy}
+ Specifying "pressure" disables per-cgroup pressure
+ stall information accounting feature
cgroup_no_v1= [KNL] Disable cgroup controllers and named hierarchies in v1
Format: { { controller | "all" | "named" }
loops can be debugged more effectively on production
systems.
+ clocksource.max_cswd_read_retries= [KNL]
+ Number of clocksource_watchdog() retries due to
+ external delays before the clock will be marked
+ unstable. Defaults to three retries, that is,
+ four attempts to read the clock under test.
+
+ clocksource.verify_n_cpus= [KNL]
+ Limit the number of CPUs checked for clocksources
+ marked with CLOCK_SOURCE_VERIFY_PERCPU that
+ are marked unstable due to excessive skew.
+ A negative value says to check all CPUs, while
+ zero says not to check any. Values larger than
+ nr_cpu_ids are silently truncated to nr_cpu_ids.
+ The actual CPUs are chosen randomly, with
+ no replacement if the same CPU is chosen twice.
+
+ clocksource-wdtest.holdoff= [KNL]
+ Set the time in seconds that the clocksource
+ watchdog test waits before commencing its tests.
+ Defaults to zero when built as a module and to
+ 10 seconds when built into the kernel.
+
clearcpuid=BITNUM[,BITNUM...] [X86]
Disable CPUID feature X for the kernel. See
arch/x86/include/asm/cpufeatures.h for the valid bit
Documentation/admin-guide/mm/hugetlbpage.rst.
Format: size[KMG]
+ hugetlb_free_vmemmap=
+ [KNL] Reguires CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
+ enabled.
+ Allows heavy hugetlb users to free up some more
+ memory (6 * PAGE_SIZE for each 2MB hugetlb page).
+ Format: { on | off (default) }
+
+ on: enable the feature
+ off: disable the feature
+
+ Built with CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON=y,
+ the default is on.
+
+ This is not compatible with memory_hotplug.memmap_on_memory.
+ If both parameters are enabled, hugetlb_free_vmemmap takes
+ precedence over memory_hotplug.memmap_on_memory.
+
hung_task_panic=
[KNL] Should the hung task detector generate panics.
Format: 0 | 1
forcing Dual Address Cycle for PCI cards supporting
greater than 32-bit addressing.
- iommu.strict= [ARM64] Configure TLB invalidation behaviour
+ iommu.strict= [ARM64, X86] Configure TLB invalidation behaviour
Format: { "0" | "1" }
0 - Lazy mode.
Request that DMA unmap operations use deferred
1 - Strict mode (default).
DMA unmap operations invalidate IOMMU hardware TLBs
synchronously.
+ Note: on x86, the default behaviour depends on the
+ equivalent driver-specific parameters, but a strict
+ mode explicitly specified by either method takes
+ precedence.
iommu.passthrough=
[ARM64, X86] Configure DMA to bypass the IOMMU by default.
Note that even when enabled, there are a few cases where
the feature is not effective.
+ This is not compatible with hugetlb_free_vmemmap. If
+ both parameters are enabled, hugetlb_free_vmemmap takes
+ precedence over memory_hotplug.memmap_on_memory.
+
memtest= [KNL,X86,ARM,PPC,RISCV] Enable memtest
Format: <integer>
default : 0 <disable>
noclflush [BUGS=X86] Don't use the CLFLUSH instruction
- nodelayacct [KNL] Disable per-task delay accounting
+ delayacct [KNL] Enable per-task delay accounting
nodsp [SH] Disable hardware DSP at boot time.
nr_uarts= [SERIAL] maximum number of UARTs to be registered.
+ numa=off [KNL, ARM64, PPC, RISCV, SPARC, X86] Disable NUMA, Only
+ set up a single NUMA node spanning all memory.
+
numa_balancing= [KNL,ARM64,PPC,RISCV,S390,X86] Enable or disable automatic
NUMA balancing.
Allowed values are enable and disable
off: turn off poisoning (default)
on: turn on poisoning
+ page_reporting.page_reporting_order=
+ [KNL] Minimal page reporting order
+ Format: <integer>
+ Adjust the minimal page reporting order. The page
+ reporting is disabled when it exceeds (MAX_ORDER-1).
+
panic= [KNL] Kernel behaviour on panic: delay <timeout>
timeout > 0: seconds before rebooting
timeout = 0: wait forever
Reserves a hole at the top of the kernel virtual
address space.
- reservelow= [X86]
- Format: nn[K]
- Set the amount of memory to reserve for BIOS at
- the bottom of the address space.
-
reset_devices [KNL] Force drivers to reset the underlying device
during initialization.
exception. Default behavior is by #AC if
both features are enabled in hardware.
+ ratelimit:N -
+ Set system wide rate limit to N bus locks
+ per second for bus lock detection.
+ 0 < N <= 1000.
+
+ N/A for split lock detection.
+
+
If an #AC exception is hit in the kernel or in
firmware (i.e. not while executing in user mode)
the kernel will oops in either "warn" or "fatal"
B: https://bugzilla.kernel.org
F: drivers/acpi/acpi_video.c
+ ACPI VIOT DRIVER
+ S: Maintained
+ F: drivers/acpi/viot.c
+ F: include/linux/acpi_viot.h
+
ACPI WMI DRIVER
S: Orphan
S: Supported
-T: git git://people.freedesktop.org/~agd5f/linux
+T: git https://gitlab.freedesktop.org/agd5f/linux.git
F: drivers/gpu/drm/amd/display/
AMD FAM15H PROCESSOR POWER MONITORING DRIVER
S: Supported
-T: git git://people.freedesktop.org/~agd5f/linux
+T: git https://gitlab.freedesktop.org/agd5f/linux.git
F: drivers/gpu/drm/amd/pm/powerplay/
AMD SEATTLE DEVICE TREE SUPPORT
AMD SENSOR FUSION HUB DRIVER
-M: Sandeep Singh <sandeep.singh@amd.com>
+M: Basavaraj Natikar <basavaraj.natikar@amd.com>
S: Maintained
F: Documentation/hid/amd-sfh*
T: git https://github.com/AsahiLinux/linux.git
F: Documentation/devicetree/bindings/arm/apple.yaml
F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml
+F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
F: arch/arm64/boot/dts/apple/
F: drivers/irqchip/irq-apple-aic.c
F: include/dt-bindings/interrupt-controller/apple-aic.h
+F: include/dt-bindings/pinctrl/apple.h
ARM/ARTPEC MACHINE SUPPORT
F: Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt
F: Documentation/devicetree/bindings/rtc/faraday,ftrtc010.txt
F: arch/arm/mach-gemini/
+F: drivers/crypto/gemini/
F: drivers/net/ethernet/cortina/
F: drivers/pinctrl/pinctrl-gemini.c
F: drivers/rtc/rtc-ftrtc010.c
ARM/CZ.NIC TURRIS SUPPORT
S: Maintained
W: https://www.turris.cz/
F: Documentation/ABI/testing/debugfs-moxtet
F: Documentation/devicetree/bindings/timer/intel,ixp4xx-timer.yaml
F: arch/arm/mach-ixp4xx/
F: drivers/clocksource/timer-ixp4xx.c
+F: drivers/crypto/ixp4xx_crypto.c
F: drivers/gpio/gpio-ixp4xx.c
F: drivers/irqchip/irq-ixp4xx.c
F: include/linux/irqchip/irq-ixp4xx.h
BROADCOM NETXTREME-E ROCE DRIVER
S: Supported
F: scripts/clang-tools/
K: \b(?i:clang|llvm)\b
+CLANG CONTROL FLOW INTEGRITY SUPPORT
+S: Supported
+B: https://github.com/ClangBuiltLinux/linux/issues
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/clang/features
+F: include/linux/cfi.h
+F: kernel/cfi.c
+
CLEANCACHE API
F: drivers/video/console/
F: include/linux/console*
+CONTEXT TRACKING
+S: Maintained
+F: kernel/context_tracking.c
+F: include/linux/context_tracking*
+
CONTROL GROUP (CGROUP)
S: Maintained
-F: drivers/platform/x86/dell/dell-wmi.c
+F: drivers/platform/x86/dell/dell-wmi-base.c
+
+DELL WMI HARDWARE PRIVACY SUPPORT
+S: Maintained
+F: drivers/platform/x86/dell/dell-wmi-privacy.c
DELTA ST MEDIA DRIVER
T: git git://linuxtv.org/media_tree.git
F: drivers/media/platform/sti/delta
+DELTA DPS920AB PSU DRIVER
+S: Maintained
+F: Documentation/hwmon/dps920ab.rst
+F: drivers/hwmon/pmbus/dps920ab.c
+
DENALI NAND DRIVER
S: Orphan
F: drivers/gpu/drm/savage/
F: include/uapi/drm/savage_drm.h
+DRM DRIVER FOR SIMPLE FRAMEBUFFERS
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/tiny/simpledrm.c
+
DRM DRIVER FOR SIS VIDEO CARDS
S: Orphan / Obsolete
F: drivers/gpu/drm/sis/
F: Documentation/devicetree/bindings/display/hisilicon/
F: drivers/gpu/drm/hisilicon/
+DRM DRIVER FOR HYPERV SYNTHETIC VIDEO DEVICE
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/hyperv
+
DRM DRIVERS FOR LIMA
S: Maintained
-T: git git://people.freedesktop.org/~agd5f/linux
+T: git git://anongit.freedesktop.org/drm/drm-misc
F: drivers/gpu/drm/ttm/
F: include/drm/ttm/
F: fs/ecryptfs/
EDAC-AMD64
-S: Maintained
+S: Supported
F: drivers/edac/amd64_edac*
+F: drivers/edac/mce_amd*
EDAC-ARMADA
EMULEX ONECONNECT ROCE DRIVER
S: Odd Fixes
W: http://www.broadcom.com
EROFS FILE SYSTEM
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
F: Documentation/devicetree/bindings/net/qca,ar803x.yaml
F: Documentation/networking/phy.rst
F: drivers/net/mdio/
+F: drivers/net/mdio/acpi_mdio.c
+F: drivers/net/mdio/fwnode_mdio.c
F: drivers/net/mdio/of_mdio.c
F: drivers/net/pcs/
F: drivers/net/phy/
FREESCALE CAAM (Cryptographic Acceleration and Assurance Module) DRIVER
-M: Aymen Sghaier <aymen.sghaier@nxp.com>
+M: Pankaj Gupta <pankaj.gupta@nxp.com>
S: Maintained
F: Documentation/devicetree/bindings/crypto/fsl-sec4.txt
F: include/linux/fs_enet_pd.h
FREESCALE SOC SOUND DRIVERS
S: Supported
F: scripts/gdb/
+GEMINI CRYPTO DRIVER
+S: Maintained
+F: drivers/crypto/gemini/
+
GEMTEK FM RADIO RECEIVER DRIVER
S: Maintained
F: drivers/input/touchscreen/resistive-adc-touch.c
+GENERIC STRING LIBRARY
+S: Maintained
+F: lib/string.c
+F: lib/string_helpers.c
+F: lib/test_string.c
+F: lib/test-string_helpers.c
+
GENERIC UIO DRIVER FOR PCI DEVICES
S: Maintained
F: drivers/i2c/busses/i2c-icy.c
-IDE SUBSYSTEM
-S: Maintained
-Q: http://patchwork.ozlabs.org/project/linux-ide/list/
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide.git
-F: Documentation/ide/
-F: drivers/ide/
-F: include/linux/ide.h
-
-IDE/ATAPI DRIVERS
-S: Orphan
-F: Documentation/cdrom/ide-cd.rst
-F: drivers/ide/ide-cd*
-
IDEAPAD LAPTOP EXTRAS DRIVER
F: drivers/net/ethernet/intel/
F: drivers/net/ethernet/intel/*/
F: include/linux/avf/virtchnl.h
+F: include/linux/net/intel/iidc.h
+
+INTEL ETHERNET PROTOCOL DRIVER FOR RDMA
+S: Supported
+F: drivers/infiniband/hw/irdma/
+F: include/uapi/rdma/irdma-abi.h
INTEL FRAMEBUFFER DRIVER (excluding 810 and 815)
F: Documentation/userspace-api/media/v4l/pixfmt-meta-intel-ipu3.rst
F: drivers/staging/media/ipu3/
+INTEL IXP4XX CRYPTO SUPPORT
+S: Maintained
+F: drivers/crypto/ixp4xx_crypto.c
+
INTEL IXP4XX QMGR, NPE, ETHERNET and HSS SUPPORT
S: Maintained
S: Supported
F: drivers/cpufreq/intel_pstate.c
-INTEL RDMA RNIC DRIVER
-S: Supported
-F: drivers/infiniband/hw/i40iw/
-F: include/uapi/rdma/i40iw-abi.h
-
INTEL SCU DRIVERS
S: Maintained
F: arch/x86/include/asm/intel_scu_ipc.h
F: drivers/platform/x86/intel_scu_*
+INTEL SKYLAKE INT3472 ACPI DEVICE DRIVER
+S: Maintained
+F: drivers/platform/x86/intel/int3472/
+
INTEL SPEED SELECT TECHNOLOGY
F: include/linux/firmware/intel/stratix10-svc-client.h
INTEL TELEMETRY DRIVER
+M: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
S: Maintained
S: Maintained
F: drivers/platform/x86/intel-wmi-thunderbolt.c
+INTEL WWAN IOSM DRIVER
+S: Maintained
+F: drivers/net/wwan/iosm/
+
INTEL(R) TRACE HUB
S: Supported
T: git git://linuxtv.org/anttip/media_tree.git
F: drivers/media/tuners/it913x*
+ITE IT66121 HDMI BRIDGE DRIVER
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/bridge/ite,it66121.yaml
+F: drivers/gpu/drm/bridge/ite-it66121.c
+
IVTV VIDEO4LINUX DRIVER
F: arch/arm64/include/uapi/asm/kvm*
F: arch/arm64/kvm/
F: include/kvm/arm_*
+F: tools/testing/selftests/kvm/*/aarch64/
+F: tools/testing/selftests/kvm/aarch64/
KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)
F: drivers/mailbox/
F: include/linux/mailbox_client.h
F: include/linux/mailbox_controller.h
+F: include/dt-bindings/mailbox/
F: Documentation/devicetree/bindings/mailbox/
MAILBOX ARM MHUv2
MARVELL MV88X3310 PHY DRIVER
S: Maintained
F: drivers/net/phy/marvell10g.c
MEDIA DRIVERS FOR FREESCALE IMX7
S: Maintained
T: git git://linuxtv.org/media_tree.git
S: Supported
T: git git://linuxtv.org/media_tree.git
F: Documentation/devicetree/bindings/media/renesas,csi2.yaml
+F: Documentation/devicetree/bindings/media/renesas,isp.yaml
F: Documentation/devicetree/bindings/media/renesas,vin.yaml
F: drivers/media/platform/rcar-vin/
F: include/linux/pagewalk.h
F: include/linux/vmalloc.h
F: mm/
+F: tools/testing/selftests/vm/
MEMORY TECHNOLOGY DEVICES (MTD)
S: Supported
-F: Documentation/devicetree/bindings/media/atmel-isc.txt
+F: Documentation/devicetree/bindings/media/atmel,isc.yaml
+F: Documentation/devicetree/bindings/media/microchip,xisc.yaml
F: drivers/media/platform/atmel/atmel-isc-base.c
F: drivers/media/platform/atmel/atmel-isc-regs.h
F: drivers/media/platform/atmel/atmel-isc.h
F: drivers/media/platform/atmel/atmel-sama5d2-isc.c
+F: drivers/media/platform/atmel/atmel-sama7g5-isc.c
F: include/linux/atmel-isc-media.h
MICROCHIP ISI DRIVER
S: Maintained
W: https://github.com/linux-surface/surface-aggregator-module
-C: irc://chat.freenode.net/##linux-surface
+C: irc://irc.libera.chat/linux-surface
F: Documentation/driver-api/surface_aggregator/
F: drivers/platform/surface/aggregator/
F: drivers/platform/surface/surface_acpi_notify.c
F: drivers/media/pci/meye/
F: include/uapi/linux/meye.h
+MOTORCOMM PHY DRIVER
+S: Maintained
+F: drivers/net/phy/motorcomm.c
+
MOXA SMARTIO/INDUSTIO/INTELLIO SERIAL CARD
S: Orphan
F: Documentation/driver-api/serial/moxa-smartio.rst
F: drivers/net/ethernet/natsemi/natsemi.c
NCR 5380 SCSI DRIVERS
-M: Finn Thain <fthain@telegraphics.com.au>
+M: Finn Thain <fthain@linux-m68k.org>
S: Maintained
W: http://www.iptables.org/
W: http://www.nftables.org/
Q: http://patchwork.ozlabs.org/project/netfilter-devel/list/
+C: irc://irc.libera.chat/netfilter
T: git git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf.git
T: git git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git
F: include/linux/netfilter*
F: fs/ntfs/
NUBUS SUBSYSTEM
-M: Finn Thain <fthain@telegraphics.com.au>
+M: Finn Thain <fthain@linux-m68k.org>
S: Maintained
F: arch/*/include/asm/nubus.h
S: Maintained
F: drivers/net/dsa/sja1105
+F: drivers/net/pcs/pcs-xpcs-nxp.c
NXP TDA998X DRM DRIVER
F: Documentation/devicetree/bindings/opp/qcom-nvmem-cpufreq.txt
F: drivers/cpufreq/qcom-cpufreq-nvmem.c
+QUALCOMM CRYPTO DRIVERS
+S: Maintained
+F: drivers/crypto/qce/
+
QUALCOMM EMAC GIGABIT ETHERNET DRIVER
RADEON and AMDGPU DRM DRIVERS
S: Supported
T: git https://gitlab.freedesktop.org/agd5f/linux.git
F: include/uapi/linux/rpmsg.h
F: samples/rpmsg/
+REMOTE PROCESSOR MESSAGING (RPMSG) WWAN CONTROL DRIVER
+S: Maintained
+F: drivers/net/wwan/rpmsg_wwan_ctrl.c
+
RENESAS CLOCK DRIVERS
N: riscv
K: riscv
+RISC-V/MICROCHIP POLARFIRE SOC SUPPORT
+S: Supported
+F: drivers/mailbox/mailbox-mpfs.c
+F: drivers/soc/microchip/
+F: include/soc/microchip/mpfs.h
+
RNBD BLOCK DRIVERS
F: drivers/ssb/
F: include/linux/ssb/
+SONY IMX208 SENSOR DRIVER
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/i2c/imx208.c
+
SONY IMX214 SENSOR DRIVER
S: Supported
F: drivers/net/pcs/pcs-xpcs.c
+F: drivers/net/pcs/pcs-xpcs.h
F: include/linux/pcs/pcs-xpcs.h
SYNOPSYS DESIGNWARE I2C DRIVER
T: git git://repo.or.cz/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git
F: drivers/platform/x86/thinkpad_acpi.c
+THINKPAD LMI DRIVER
+S: Maintained
+F: Documentation/ABI/testing/sysfs-class-firmware-attributes
+F: drivers/platform/x86/think-lmi.?
+
THUNDERBOLT DMA TRAFFIC TEST DRIVER
F: include/linux/regulator/
K: regulator_get_optional
+VOLTAGE AND CURRENT REGULATOR IRQ HELPERS
+F: drivers/regulator/irq_helpers.c
+
VRF
T: git git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk.git
F: Documentation/core-api/printk-formats.rst
F: lib/test_printf.c
+F: lib/test_scanf.c
F: lib/vsprintf.c
VT1211 HARDWARE MONITOR DRIVER
F: include/linux/workqueue.h
F: kernel/workqueue.c
+WWAN DRIVERS
+S: Maintained
+F: drivers/net/wwan/
+F: include/linux/wwan.h
+F: include/uapi/linux/wwan.h
+
X-POWERS AXP288 PMIC DRIVERS
S: Maintained
S: Maintained
-F: include/linux/zbud.h
F: mm/zbud.c
ZD1211RW WIRELESS DRIVER
source "drivers/acpi/pmic/Kconfig"
+ config ACPI_VIOT
+ bool
+
endif # ACPI
config X86_PM_TIMER
You should nearly always say Y here because many modern
systems require this timer.
+
+config ACPI_PRMT
+ bool "Platform Runtime Mechanism Support"
+ depends on EFI && X86_64
+ default y
#
# ACPI Boot-Time Table Parsing
#
+ifeq ($(CONFIG_ACPI_CUSTOM_DSDT),y)
+tables.o: $(src)/../../include/$(subst $\",,$(CONFIG_ACPI_CUSTOM_DSDT_FILE)) ;
+
+endif
+
obj-$(CONFIG_ACPI) += tables.o
obj-$(CONFIG_X86) += blacklist.o
acpi-$(CONFIG_ACPI_LPIT) += acpi_lpit.o
acpi-$(CONFIG_ACPI_GENERIC_GSI) += irq.o
acpi-$(CONFIG_ACPI_WATCHDOG) += acpi_watchdog.o
+acpi-$(CONFIG_ACPI_PRMT) += prmt.o
# Address translation
acpi-$(CONFIG_ACPI_ADXL) += acpi_adxl.o
obj-y += dptf/
obj-$(CONFIG_ARM64) += arm64/
+
+ obj-$(CONFIG_ACPI_VIOT) += viot.o
return NULL;
}
- static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev)
- {
- struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
-
- return (fwspec && fwspec->ops) ? fwspec->ops : NULL;
- }
-
- static inline int iort_add_device_replay(struct device *dev)
- {
- int err = 0;
-
- if (dev->bus && !device_iommu_mapped(dev))
- err = iommu_probe_device(dev);
-
- return err;
- }
-
/**
* iort_iommu_msi_get_resv_regions - Reserved region driver helper
* @dev: Device from iommu_get_resv_regions()
}
}
- static int arm_smmu_iort_xlate(struct device *dev, u32 streamid,
- struct fwnode_handle *fwnode,
- const struct iommu_ops *ops)
- {
- int ret = iommu_fwspec_init(dev, fwnode, ops);
-
- if (!ret)
- ret = iommu_fwspec_add_ids(dev, &streamid, 1);
-
- return ret;
- }
-
static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node)
{
struct acpi_iort_root_complex *pci_rc;
return iort_iommu_driver_enabled(node->type) ?
-EPROBE_DEFER : -ENODEV;
- return arm_smmu_iort_xlate(dev, streamid, iort_fwnode, ops);
+ return acpi_iommu_fwspec_init(dev, streamid, iort_fwnode, ops);
}
struct iort_pci_alias_info {
static void iort_named_component_init(struct device *dev,
struct acpi_iort_node *node)
{
- struct property_entry props[2] = {};
+ struct property_entry props[3] = {};
struct acpi_iort_named_component *nc;
nc = (struct acpi_iort_named_component *)node->node_data;
props[0] = PROPERTY_ENTRY_U32("pasid-num-bits",
FIELD_GET(ACPI_IORT_NC_PASID_BITS,
nc->node_flags));
+ if (nc->node_flags & ACPI_IORT_NC_STALL_SUPPORTED)
+ props[1] = PROPERTY_ENTRY_BOOL("dma-can-stall");
- if (device_add_properties(dev, props))
+ if (device_create_managed_software_node(dev, props, NULL))
dev_warn(dev, "Could not add device properties\n");
}
* @dev: device to configure
* @id_in: optional input id const value pointer
*
- * Returns: iommu_ops pointer on configuration success
- * NULL on configuration failure
+ * Returns: 0 on success, <0 on failure
*/
- const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
- const u32 *id_in)
+ int iort_iommu_configure_id(struct device *dev, const u32 *id_in)
{
struct acpi_iort_node *node;
- const struct iommu_ops *ops;
int err = -ENODEV;
- /*
- * If we already translated the fwspec there
- * is nothing left to do, return the iommu_ops.
- */
- ops = iort_fwspec_iommu_ops(dev);
- if (ops)
- return ops;
-
if (dev_is_pci(dev)) {
struct iommu_fwspec *fwspec;
struct pci_bus *bus = to_pci_dev(dev)->bus;
node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX,
iort_match_node_callback, &bus->dev);
if (!node)
- return NULL;
+ return -ENODEV;
info.node = node;
err = pci_for_each_dma_alias(to_pci_dev(dev),
node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
if (!node)
- return NULL;
+ return -ENODEV;
err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) :
iort_nc_iommu_map(dev, node);
iort_named_component_init(dev, node);
}
- /*
- * If we have reason to believe the IOMMU driver missed the initial
- * add_device callback for dev, replay it to get things in order.
- */
- if (!err) {
- ops = iort_fwspec_iommu_ops(dev);
- err = iort_add_device_replay(dev);
- }
-
- /* Ignore all other errors apart from EPROBE_DEFER */
- if (err == -EPROBE_DEFER) {
- ops = ERR_PTR(err);
- } else if (err) {
- dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
- ops = NULL;
- }
-
- return ops;
+ return err;
}
#else
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
{ return 0; }
- const struct iommu_ops *iort_iommu_configure_id(struct device *dev,
- const u32 *input_id)
- { return NULL; }
+ int iort_iommu_configure_id(struct device *dev, const u32 *input_id)
+ { return -ENODEV; }
#endif
static int nc_dma_get_range(struct device *dev, u64 *size)
}
/**
- * iort_dma_setup() - Set-up device DMA parameters.
+ * iort_dma_get_ranges() - Look up DMA addressing limit for the device
+ * @dev: device to lookup
+ * @size: DMA range size result pointer
*
- * @dev: device to configure
- * @dma_addr: device DMA address result pointer
- * @dma_size: DMA range size result pointer
+ * Return: 0 on success, an error otherwise.
*/
- void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
+ int iort_dma_get_ranges(struct device *dev, u64 *size)
{
- u64 end, mask, dmaaddr = 0, size = 0, offset = 0;
- int ret;
-
- /*
- * If @dev is expected to be DMA-capable then the bus code that created
- * it should have initialised its dma_mask pointer by this point. For
- * now, we'll continue the legacy behaviour of coercing it to the
- * coherent mask if not, but we'll no longer do so quietly.
- */
- if (!dev->dma_mask) {
- dev_warn(dev, "DMA mask not set\n");
- dev->dma_mask = &dev->coherent_dma_mask;
- }
-
- if (dev->coherent_dma_mask)
- size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
+ if (dev_is_pci(dev))
+ return rc_dma_get_range(dev, size);
else
- size = 1ULL << 32;
-
- ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size);
- if (ret == -ENODEV)
- ret = dev_is_pci(dev) ? rc_dma_get_range(dev, &size)
- : nc_dma_get_range(dev, &size);
-
- if (!ret) {
- /*
- * Limit coherent and dma mask based on size retrieved from
- * firmware.
- */
- end = dmaaddr + size - 1;
- mask = DMA_BIT_MASK(ilog2(end) + 1);
- dev->bus_dma_limit = end;
- dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask);
- *dev->dma_mask = min(*dev->dma_mask, mask);
- }
-
- *dma_addr = dmaaddr;
- *dma_size = size;
-
- ret = dma_direct_set_offset(dev, dmaaddr + offset, dmaaddr, size);
-
- dev_dbg(dev, "dma_offset(%#08llx)%s\n", offset, ret ? " failed!" : "");
+ return nc_dma_get_range(dev, size);
}
static void __init acpi_iort_register_irq(int hwirq, const char *name,
#include <linux/dmi.h>
#endif
#include <linux/acpi_iort.h>
+ #include <linux/acpi_viot.h>
#include <linux/pci.h>
#include <acpi/apei.h>
#include <linux/suspend.h>
+#include <linux/prmt.h>
#include "internal.h"
out_kfree:
kfree(output.pointer);
- if (status != AE_OK)
- context->ret.pointer = NULL;
return status;
}
EXPORT_SYMBOL(acpi_run_osc);
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
+ capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT;
#ifdef CONFIG_ARM64
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT;
static void acpi_bus_decode_usb_osc(const char *msg, u32 bits)
{
- printk(KERN_INFO PREFIX "%s USB3%c DisplayPort%c PCIe%c XDomain%c\n", msg,
+ pr_info("%s USB3%c DisplayPort%c PCIe%c XDomain%c\n", msg,
(bits & OSC_USB_USB3_TUNNELING) ? '+' : '-',
(bits & OSC_USB_DP_TUNNELING) ? '+' : '-',
(bits & OSC_USB_PCIE_TUNNELING) ? '+' : '-',
return;
if (context.ret.length != sizeof(capbuf)) {
- printk(KERN_INFO PREFIX "USB4 _OSC: returned invalid length buffer\n");
+ pr_info("USB4 _OSC: returned invalid length buffer\n");
goto out_free;
}
static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context)
{
- acpi_scan_table_handler(event, table, context);
+ if (event == ACPI_TABLE_EVENT_LOAD)
+ acpi_scan_table_notify();
return acpi_sysfs_table_handler(event, table, context);
}
}
acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
- if (!acpi_kobj) {
+ if (!acpi_kobj)
pr_debug("%s: kset create error\n", __func__);
- acpi_kobj = NULL;
- }
+ init_prmt();
result = acpi_bus_init();
if (result) {
+ kobject_put(acpi_kobj);
disable_acpi();
return result;
}
acpi_wakeup_device_init();
acpi_debugger_init();
acpi_setup_sb_notify_handler();
+ acpi_viot_init();
return 0;
}
* scan.c - support for transforming the ACPI namespace into individual objects
*/
+#define pr_fmt(fmt) "ACPI: " fmt
+
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
+ #include <linux/acpi_viot.h>
+ #include <linux/iommu.h>
#include <linux/signal.h>
#include <linux/kthread.h>
#include <linux/dmi.h>
*/
static u64 spcr_uart_addr;
-struct acpi_dep_data {
- struct list_head node;
- acpi_handle supplier;
- acpi_handle consumer;
-};
-
void acpi_scan_lock_acquire(void)
{
mutex_lock(&acpi_scan_lock);
return handle_to_device(handle, get_acpi_device);
}
-void acpi_bus_put_acpi_device(struct acpi_device *adev)
-{
- acpi_dev_put(adev);
-}
-
static struct acpi_device_bus_id *acpi_device_bus_id_match(const char *dev_id)
{
struct acpi_device_bus_id *acpi_device_bus_id;
return 0;
}
-int acpi_device_add(struct acpi_device *device,
- void (*release)(struct device *))
+static int acpi_tie_acpi_dev(struct acpi_device *adev)
{
- struct acpi_device_bus_id *acpi_device_bus_id;
- int result;
+ acpi_handle handle = adev->handle;
+ acpi_status status;
- if (device->handle) {
- acpi_status status;
+ if (!handle)
+ return 0;
- status = acpi_attach_data(device->handle, acpi_scan_drop_device,
- device);
- if (ACPI_FAILURE(status)) {
- acpi_handle_err(device->handle,
- "Unable to attach device data\n");
- return -ENODEV;
- }
+ status = acpi_attach_data(handle, acpi_scan_drop_device, adev);
+ if (ACPI_FAILURE(status)) {
+ acpi_handle_err(handle, "Unable to attach device data\n");
+ return -ENODEV;
}
+ return 0;
+}
+
+static int __acpi_device_add(struct acpi_device *device,
+ void (*release)(struct device *))
+{
+ struct acpi_device_bus_id *acpi_device_bus_id;
+ int result;
+
/*
* Linkage
* -------
result = acpi_device_setup_files(device);
if (result)
- printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n",
+ pr_err("Error creating sysfs interface for device %s\n",
dev_name(&device->dev));
return 0;
return result;
}
+int acpi_device_add(struct acpi_device *adev, void (*release)(struct device *))
+{
+ int ret;
+
+ ret = acpi_tie_acpi_dev(adev);
+ if (ret)
+ return ret;
+
+ return __acpi_device_add(adev, release);
+}
+
/* --------------------------------------------------------------------------
Device Enumeration
-------------------------------------------------------------------------- */
acpi_get_object_info(handle, &info);
if (!info) {
- pr_err(PREFIX "%s: Error reading device info\n",
- __func__);
+ pr_err("%s: Error reading device info\n", __func__);
return;
}
*
* Return false if DMA is not supported. Otherwise, return true
*/
-bool acpi_dma_supported(struct acpi_device *adev)
+bool acpi_dma_supported(const struct acpi_device *adev)
{
if (!adev)
return false;
return ret >= 0 ? 0 : ret;
}
+ #ifdef CONFIG_IOMMU_API
+ int acpi_iommu_fwspec_init(struct device *dev, u32 id,
+ struct fwnode_handle *fwnode,
+ const struct iommu_ops *ops)
+ {
+ int ret = iommu_fwspec_init(dev, fwnode, ops);
+
+ if (!ret)
+ ret = iommu_fwspec_add_ids(dev, &id, 1);
+
+ return ret;
+ }
+
+ static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev)
+ {
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+
+ return fwspec ? fwspec->ops : NULL;
+ }
+
+ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
+ const u32 *id_in)
+ {
+ int err;
+ const struct iommu_ops *ops;
+
+ /*
+ * If we already translated the fwspec there is nothing left to do,
+ * return the iommu_ops.
+ */
+ ops = acpi_iommu_fwspec_ops(dev);
+ if (ops)
+ return ops;
+
+ err = iort_iommu_configure_id(dev, id_in);
+ if (err && err != -EPROBE_DEFER)
+ err = viot_iommu_configure(dev);
+
+ /*
+ * If we have reason to believe the IOMMU driver missed the initial
+ * iommu_probe_device() call for dev, replay it to get things in order.
+ */
+ if (!err && dev->bus && !device_iommu_mapped(dev))
+ err = iommu_probe_device(dev);
+
+ /* Ignore all other errors apart from EPROBE_DEFER */
+ if (err == -EPROBE_DEFER) {
+ return ERR_PTR(err);
+ } else if (err) {
+ dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
+ return NULL;
+ }
+ return acpi_iommu_fwspec_ops(dev);
+ }
+
+ #else /* !CONFIG_IOMMU_API */
+
+ int acpi_iommu_fwspec_init(struct device *dev, u32 id,
+ struct fwnode_handle *fwnode,
+ const struct iommu_ops *ops)
+ {
+ return -ENODEV;
+ }
+
+ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
+ const u32 *id_in)
+ {
+ return NULL;
+ }
+
+ #endif /* !CONFIG_IOMMU_API */
+
/**
* acpi_dma_configure_id - Set-up DMA configuration for the device.
* @dev: The pointer to the device
return 0;
}
- iort_dma_setup(dev, &dma_addr, &size);
+ acpi_arch_dma_setup(dev, &dma_addr, &size);
- iommu = iort_iommu_configure_id(dev, input_id);
+ iommu = acpi_iommu_configure_id(dev, input_id);
if (PTR_ERR(iommu) == -EPROBE_DEFER)
return -EPROBE_DEFER;
device_initialize(&device->dev);
dev_set_uevent_suppress(&device->dev, true);
acpi_init_coherency(device);
- /* Assume there are unmet deps to start with. */
- device->dep_unmet = 1;
+}
+
+static void acpi_scan_dep_init(struct acpi_device *adev)
+{
+ struct acpi_dep_data *dep;
+
+ list_for_each_entry(dep, &acpi_dep_list, node) {
+ if (dep->consumer == adev->handle)
+ adev->dep_unmet++;
+ }
}
void acpi_device_add_finalize(struct acpi_device *device)
}
static int acpi_add_single_object(struct acpi_device **child,
- acpi_handle handle, int type)
+ acpi_handle handle, int type, bool dep_init)
{
struct acpi_device *device;
+ bool release_dep_lock = false;
int result;
device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
* acpi_bus_get_status() and use its quirk handling. Note that
* this must be done before the get power-/wakeup_dev-flags calls.
*/
- if (type == ACPI_BUS_TYPE_DEVICE || type == ACPI_BUS_TYPE_PROCESSOR)
+ if (type == ACPI_BUS_TYPE_DEVICE || type == ACPI_BUS_TYPE_PROCESSOR) {
+ if (dep_init) {
+ mutex_lock(&acpi_dep_list_lock);
+ /*
+ * Hold the lock until the acpi_tie_acpi_dev() call
+ * below to prevent concurrent acpi_scan_clear_dep()
+ * from deleting a dependency list entry without
+ * updating dep_unmet for the device.
+ */
+ release_dep_lock = true;
+ acpi_scan_dep_init(device);
+ }
acpi_scan_init_status(device);
+ }
acpi_bus_get_power_flags(device);
acpi_bus_get_wakeup_device_flags(device);
- result = acpi_device_add(device, acpi_device_release);
+ result = acpi_tie_acpi_dev(device);
+
+ if (release_dep_lock)
+ mutex_unlock(&acpi_dep_list_lock);
+
+ if (!result)
+ result = __acpi_device_add(device, acpi_device_release);
+
if (result) {
acpi_device_release(&device->dev);
return result;
return count;
}
-static void acpi_scan_dep_init(struct acpi_device *adev)
-{
- struct acpi_dep_data *dep;
-
- adev->dep_unmet = 0;
-
- mutex_lock(&acpi_dep_list_lock);
-
- list_for_each_entry(dep, &acpi_dep_list, node) {
- if (dep->consumer == adev->handle)
- adev->dep_unmet++;
- }
-
- mutex_unlock(&acpi_dep_list_lock);
-}
-
static bool acpi_bus_scan_second_pass;
static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep,
return AE_OK;
}
- acpi_add_single_object(&device, handle, type);
- if (!device)
- return AE_CTRL_DEPTH;
-
- acpi_scan_init_hotplug(device);
/*
* If check_dep is true at this point, the device has no dependencies,
* or the creation of the device object would have been postponed above.
*/
- if (check_dep)
- device->dep_unmet = 0;
- else
- acpi_scan_dep_init(device);
+ acpi_add_single_object(&device, handle, type, !check_dep);
+ if (!device)
+ return AE_CTRL_DEPTH;
+
+ acpi_scan_init_hotplug(device);
out:
if (!*adev_p)
device->handler->hotplug.notify_online(device);
}
-void acpi_walk_dep_device_list(acpi_handle handle)
+static int acpi_dev_get_first_consumer_dev_cb(struct acpi_dep_data *dep, void *data)
{
- struct acpi_dep_data *dep, *tmp;
struct acpi_device *adev;
+ adev = acpi_bus_get_acpi_device(dep->consumer);
+ if (adev) {
+ *(struct acpi_device **)data = adev;
+ return 1;
+ }
+ /* Continue parsing if the device object is not present. */
+ return 0;
+}
+
+struct acpi_scan_clear_dep_work {
+ struct work_struct work;
+ struct acpi_device *adev;
+};
+
+static void acpi_scan_clear_dep_fn(struct work_struct *work)
+{
+ struct acpi_scan_clear_dep_work *cdw;
+
+ cdw = container_of(work, struct acpi_scan_clear_dep_work, work);
+
+ acpi_scan_lock_acquire();
+ acpi_bus_attach(cdw->adev, true);
+ acpi_scan_lock_release();
+
+ acpi_dev_put(cdw->adev);
+ kfree(cdw);
+}
+
+static bool acpi_scan_clear_dep_queue(struct acpi_device *adev)
+{
+ struct acpi_scan_clear_dep_work *cdw;
+
+ if (adev->dep_unmet)
+ return false;
+
+ cdw = kmalloc(sizeof(*cdw), GFP_KERNEL);
+ if (!cdw)
+ return false;
+
+ cdw->adev = adev;
+ INIT_WORK(&cdw->work, acpi_scan_clear_dep_fn);
+ /*
+ * Since the work function may block on the lock until the entire
+ * initial enumeration of devices is complete, put it into the unbound
+ * workqueue.
+ */
+ queue_work(system_unbound_wq, &cdw->work);
+
+ return true;
+}
+
+static int acpi_scan_clear_dep(struct acpi_dep_data *dep, void *data)
+{
+ struct acpi_device *adev = acpi_bus_get_acpi_device(dep->consumer);
+
+ if (adev) {
+ adev->dep_unmet--;
+ if (!acpi_scan_clear_dep_queue(adev))
+ acpi_dev_put(adev);
+ }
+
+ list_del(&dep->node);
+ kfree(dep);
+
+ return 0;
+}
+
+/**
+ * acpi_walk_dep_device_list - Apply a callback to every entry in acpi_dep_list
+ * @handle: The ACPI handle of the supplier device
+ * @callback: Pointer to the callback function to apply
+ * @data: Pointer to some data to pass to the callback
+ *
+ * The return value of the callback determines this function's behaviour. If 0
+ * is returned we continue to iterate over acpi_dep_list. If a positive value
+ * is returned then the loop is broken but this function returns 0. If a
+ * negative value is returned by the callback then the loop is broken and that
+ * value is returned as the final error.
+ */
+static int acpi_walk_dep_device_list(acpi_handle handle,
+ int (*callback)(struct acpi_dep_data *, void *),
+ void *data)
+{
+ struct acpi_dep_data *dep, *tmp;
+ int ret = 0;
+
mutex_lock(&acpi_dep_list_lock);
list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) {
if (dep->supplier == handle) {
- acpi_bus_get_device(dep->consumer, &adev);
-
- if (adev) {
- adev->dep_unmet--;
- if (!adev->dep_unmet)
- acpi_bus_attach(adev, true);
- }
-
- list_del(&dep->node);
- kfree(dep);
+ ret = callback(dep, data);
+ if (ret)
+ break;
}
}
mutex_unlock(&acpi_dep_list_lock);
+
+ return ret > 0 ? 0 : ret;
+}
+
+/**
+ * acpi_dev_clear_dependencies - Inform consumers that the device is now active
+ * @supplier: Pointer to the supplier &struct acpi_device
+ *
+ * Clear dependencies on the given device.
+ */
+void acpi_dev_clear_dependencies(struct acpi_device *supplier)
+{
+ acpi_walk_dep_device_list(supplier->handle, acpi_scan_clear_dep, NULL);
+}
+EXPORT_SYMBOL_GPL(acpi_dev_clear_dependencies);
+
+/**
+ * acpi_dev_get_first_consumer_dev - Return ACPI device dependent on @supplier
+ * @supplier: Pointer to the dependee device
+ *
+ * Returns the first &struct acpi_device which declares itself dependent on
+ * @supplier via the _DEP buffer, parsed from the acpi_dep_list.
+ *
+ * The caller is responsible for putting the reference to adev when it is no
+ * longer needed.
+ */
+struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier)
+{
+ struct acpi_device *adev = NULL;
+
+ acpi_walk_dep_device_list(supplier->handle,
+ acpi_dev_get_first_consumer_dev_cb, &adev);
+
+ return adev;
}
-EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list);
+EXPORT_SYMBOL_GPL(acpi_dev_get_first_consumer_dev);
/**
* acpi_bus_scan - Add ACPI device node objects in a given namespace scope.
struct acpi_device *device = NULL;
int result;
- result = acpi_add_single_object(&device, NULL, type);
+ result = acpi_add_single_object(&device, NULL, type, false);
if (result)
return result;
struct acpi_device *device = NULL;
result = acpi_add_single_object(&device, NULL,
- ACPI_BUS_TYPE_POWER_BUTTON);
+ ACPI_BUS_TYPE_POWER_BUTTON, false);
if (result)
return result;
struct acpi_device *device = NULL;
result = acpi_add_single_object(&device, NULL,
- ACPI_BUS_TYPE_SLEEP_BUTTON);
+ ACPI_BUS_TYPE_SLEEP_BUTTON, false);
if (result)
return result;
status = acpi_get_table(ACPI_SIG_SPCR, 0,
(struct acpi_table_header **)&spcr_ptr);
if (ACPI_FAILURE(status)) {
- pr_warn(PREFIX "STAO table present, but SPCR is missing\n");
+ pr_warn("STAO table present, but SPCR is missing\n");
return;
}
(struct acpi_table_header **)&stao_ptr);
if (ACPI_SUCCESS(status)) {
if (stao_ptr->header.length > sizeof(struct acpi_table_stao))
- pr_info(PREFIX "STAO Name List not yet supported.\n");
+ pr_info("STAO Name List not yet supported.\n");
if (stao_ptr->ignore_uart)
acpi_get_spcr_uart_addr();
}
}
- acpi_turn_off_unused_power_resources(true);
+ acpi_turn_off_unused_power_resources();
acpi_scan_initialized = true;
return count;
}
-struct acpi_table_events_work {
- struct work_struct work;
- void *table;
- u32 event;
-};
-
static void acpi_table_events_fn(struct work_struct *work)
{
- struct acpi_table_events_work *tew;
+ acpi_scan_lock_acquire();
+ acpi_bus_scan(ACPI_ROOT_OBJECT);
+ acpi_scan_lock_release();
- tew = container_of(work, struct acpi_table_events_work, work);
-
- if (tew->event == ACPI_TABLE_EVENT_LOAD) {
- acpi_scan_lock_acquire();
- acpi_bus_scan(ACPI_ROOT_OBJECT);
- acpi_scan_lock_release();
- }
-
- kfree(tew);
+ kfree(work);
}
-void acpi_scan_table_handler(u32 event, void *table, void *context)
+void acpi_scan_table_notify(void)
{
- struct acpi_table_events_work *tew;
+ struct work_struct *work;
if (!acpi_scan_initialized)
return;
- if (event != ACPI_TABLE_EVENT_LOAD)
- return;
-
- tew = kmalloc(sizeof(*tew), GFP_KERNEL);
- if (!tew)
+ work = kmalloc(sizeof(*work), GFP_KERNEL);
+ if (!work)
return;
- INIT_WORK(&tew->work, acpi_table_events_fn);
- tew->table = table;
- tew->event = event;
-
- schedule_work(&tew->work);
+ INIT_WORK(work, acpi_table_events_fn);
+ schedule_work(work);
}
int acpi_reconfig_notifier_register(struct notifier_block *nb)
* Copyright (c) 2019, The Linux Foundation. All rights reserved.
*/
+ #include <linux/acpi.h>
#include <linux/adreno-smmu-priv.h>
#include <linux/of_device.h>
#include <linux/qcom_scm.h>
struct arm_smmu_device smmu;
bool bypass_quirk;
u8 bypass_cbndx;
+ u32 stall_enabled;
};
static struct qcom_smmu *to_qcom_smmu(struct arm_smmu_device *smmu)
static void qcom_adreno_smmu_write_sctlr(struct arm_smmu_device *smmu, int idx,
u32 reg)
{
+ struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
+
/*
* On the GPU device we want to process subsequent transactions after a
* fault to keep the GPU from hanging
*/
reg |= ARM_SMMU_SCTLR_HUPCF;
+ if (qsmmu->stall_enabled & BIT(idx))
+ reg |= ARM_SMMU_SCTLR_CFCFG;
+
arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_SCTLR, reg);
}
+static void qcom_adreno_smmu_get_fault_info(const void *cookie,
+ struct adreno_smmu_fault_info *info)
+{
+ struct arm_smmu_domain *smmu_domain = (void *)cookie;
+ struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
+
+ info->fsr = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_FSR);
+ info->fsynr0 = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_FSYNR0);
+ info->fsynr1 = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_FSYNR1);
+ info->far = arm_smmu_cb_readq(smmu, cfg->cbndx, ARM_SMMU_CB_FAR);
+ info->cbfrsynra = arm_smmu_gr1_read(smmu, ARM_SMMU_GR1_CBFRSYNRA(cfg->cbndx));
+ info->ttbr0 = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_TTBR0);
+ info->contextidr = arm_smmu_cb_read(smmu, cfg->cbndx, ARM_SMMU_CB_CONTEXTIDR);
+}
+
+static void qcom_adreno_smmu_set_stall(const void *cookie, bool enabled)
+{
+ struct arm_smmu_domain *smmu_domain = (void *)cookie;
+ struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
+ struct qcom_smmu *qsmmu = to_qcom_smmu(smmu_domain->smmu);
+
+ if (enabled)
+ qsmmu->stall_enabled |= BIT(cfg->cbndx);
+ else
+ qsmmu->stall_enabled &= ~BIT(cfg->cbndx);
+}
+
+static void qcom_adreno_smmu_resume_translation(const void *cookie, bool terminate)
+{
+ struct arm_smmu_domain *smmu_domain = (void *)cookie;
+ struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
+ u32 reg = 0;
+
+ if (terminate)
+ reg |= ARM_SMMU_RESUME_TERMINATE;
+
+ arm_smmu_cb_write(smmu, cfg->cbndx, ARM_SMMU_CB_RESUME, reg);
+}
+
#define QCOM_ADRENO_SMMU_GPU_SID 0
static bool qcom_adreno_smmu_is_gpu_device(struct device *dev)
return __arm_smmu_alloc_bitmap(smmu->context_map, start, count);
}
+ static bool qcom_adreno_can_do_ttbr1(struct arm_smmu_device *smmu)
+ {
+ const struct device_node *np = smmu->dev->of_node;
+
+ if (of_device_is_compatible(np, "qcom,msm8996-smmu-v2"))
+ return false;
+
+ return true;
+ }
+
static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
struct io_pgtable_cfg *pgtbl_cfg, struct device *dev)
{
* be AARCH64 stage 1 but double check because the arm-smmu code assumes
* that is the case when the TTBR1 quirk is enabled
*/
- if ((smmu_domain->stage == ARM_SMMU_DOMAIN_S1) &&
+ if (qcom_adreno_can_do_ttbr1(smmu_domain->smmu) &&
+ (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) &&
(smmu_domain->cfg.fmt == ARM_SMMU_CTX_FMT_AARCH64))
pgtbl_cfg->quirks |= IO_PGTABLE_QUIRK_ARM_TTBR1;
priv->cookie = smmu_domain;
priv->get_ttbr1_cfg = qcom_adreno_smmu_get_ttbr1_cfg;
priv->set_ttbr0_cfg = qcom_adreno_smmu_set_ttbr0_cfg;
+ priv->get_fault_info = qcom_adreno_smmu_get_fault_info;
+ priv->set_stall = qcom_adreno_smmu_set_stall;
+ priv->resume_translation = qcom_adreno_smmu_resume_translation;
return 0;
}
{ .compatible = "qcom,mdss" },
{ .compatible = "qcom,sc7180-mdss" },
{ .compatible = "qcom,sc7180-mss-pil" },
+ { .compatible = "qcom,sc7280-mdss" },
{ .compatible = "qcom,sc8180x-mdss" },
{ .compatible = "qcom,sdm845-mdss" },
{ .compatible = "qcom,sdm845-mss-pil" },
static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
{ .compatible = "qcom,msm8998-smmu-v2" },
{ .compatible = "qcom,sc7180-smmu-500" },
+ { .compatible = "qcom,sc7280-smmu-500" },
{ .compatible = "qcom,sc8180x-smmu-500" },
{ .compatible = "qcom,sdm630-smmu-v2" },
{ .compatible = "qcom,sdm845-smmu-500" },
+ { .compatible = "qcom,sm6125-smmu-500" },
{ .compatible = "qcom,sm8150-smmu-500" },
{ .compatible = "qcom,sm8250-smmu-500" },
{ .compatible = "qcom,sm8350-smmu-500" },
{ }
};
+ #ifdef CONFIG_ACPI
+ static struct acpi_platform_list qcom_acpi_platlist[] = {
+ { "LENOVO", "CB-01 ", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
+ { "QCOM ", "QCOMEDK2", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
+ { }
+ };
+ #endif
+
struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
{
const struct device_node *np = smmu->dev->of_node;
- if (of_match_node(qcom_smmu_impl_of_match, np))
- return qcom_smmu_create(smmu, &qcom_smmu_impl);
+ #ifdef CONFIG_ACPI
+ if (np == NULL) {
+ /* Match platform for ACPI boot */
+ if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
+ return qcom_smmu_create(smmu, &qcom_smmu_impl);
+ }
+ #endif
+ /*
+ * Do not change this order of implementation, i.e., first adreno
+ * smmu impl and then apss smmu since we can have both implementing
+ * arm,mmu-500 in which case we will miss setting adreno smmu specific
+ * features if the order is changed.
+ */
if (of_device_is_compatible(np, "qcom,adreno-smmu"))
return qcom_smmu_create(smmu, &qcom_adreno_smmu_impl);
+ if (of_match_node(qcom_smmu_impl_of_match, np))
+ return qcom_smmu_create(smmu, &qcom_smmu_impl);
+
return smmu;
}
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
- #include <linux/of_iommu.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
{
if (pm_runtime_enabled(smmu->dev))
- return pm_runtime_get_sync(smmu->dev);
+ return pm_runtime_resume_and_get(smmu->dev);
return 0;
}
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;
int idx = smmu_domain->cfg.cbndx;
+ int ret;
fsr = arm_smmu_cb_read(smmu, idx, ARM_SMMU_CB_FSR);
if (!(fsr & ARM_SMMU_FSR_FAULT))
iova = arm_smmu_cb_readq(smmu, idx, ARM_SMMU_CB_FAR);
cbfrsynra = arm_smmu_gr1_read(smmu, ARM_SMMU_GR1_CBFRSYNRA(idx));
- dev_err_ratelimited(smmu->dev,
- "Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
+ ret = report_iommu_fault(domain, NULL, iova,
+ fsynr & ARM_SMMU_FSYNR0_WNR ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ);
+
+ if (ret == -ENOSYS)
+ dev_err_ratelimited(smmu->dev,
+ "Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
fsr, iova, fsynr, cbfrsynra, idx);
arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_FSR, fsr);
u64 phys;
unsigned long va, flags;
int ret, idx = cfg->cbndx;
+ phys_addr_t addr = 0;
ret = arm_smmu_rpm_get(smmu);
if (ret < 0)
dev_err(dev,
"iova to phys timed out on %pad. Falling back to software table walk.\n",
&iova);
+ arm_smmu_rpm_put(smmu);
return ops->iova_to_phys(ops, iova);
}
if (phys & ARM_SMMU_CB_PAR_F) {
dev_err(dev, "translation fault!\n");
dev_err(dev, "PAR = 0x%llx\n", phys);
- return 0;
+ goto out;
}
+ addr = (phys & GENMASK_ULL(39, 12)) | (iova & 0xfff);
+ out:
arm_smmu_rpm_put(smmu);
- return (phys & GENMASK_ULL(39, 12)) | (iova & 0xfff);
+ return addr;
}
static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain,
iommu_fwspec_free(dev);
}
+ static void arm_smmu_probe_finalize(struct device *dev)
+ {
+ struct arm_smmu_master_cfg *cfg;
+ struct arm_smmu_device *smmu;
+
+ cfg = dev_iommu_priv_get(dev);
+ smmu = cfg->smmu;
+
+ if (smmu->impl && smmu->impl->probe_finalize)
+ smmu->impl->probe_finalize(smmu, dev);
+ }
+
static struct iommu_group *arm_smmu_device_group(struct device *dev)
{
struct arm_smmu_master_cfg *cfg = dev_iommu_priv_get(dev);
.iova_to_phys = arm_smmu_iova_to_phys,
.probe_device = arm_smmu_probe_device,
.release_device = arm_smmu_release_device,
+ .probe_finalize = arm_smmu_probe_finalize,
.device_group = arm_smmu_device_group,
.enable_nesting = arm_smmu_enable_nesting,
.set_pgtable_quirks = arm_smmu_set_pgtable_quirks,
err = iommu_device_register(&smmu->iommu, &arm_smmu_ops, dev);
if (err) {
dev_err(dev, "Failed to register iommu\n");
- return err;
+ goto err_sysfs_remove;
}
platform_set_drvdata(pdev, smmu);
* any device which might need it, so we want the bus ops in place
* ready to handle default domain setup as soon as any SMMU exists.
*/
- if (!using_legacy_binding)
- return arm_smmu_bus_init(&arm_smmu_ops);
+ if (!using_legacy_binding) {
+ err = arm_smmu_bus_init(&arm_smmu_ops);
+ if (err)
+ goto err_unregister_device;
+ }
return 0;
+
+ err_unregister_device:
+ iommu_device_unregister(&smmu->iommu);
+ err_sysfs_remove:
+ iommu_device_sysfs_remove(&smmu->iommu);
+ return err;
}
static int arm_smmu_device_remove(struct platform_device *pdev)
#define ARM_SMMU_CB_FSYNR0 0x68
#define ARM_SMMU_FSYNR0_WNR BIT(4)
+#define ARM_SMMU_CB_FSYNR1 0x6c
+
#define ARM_SMMU_CB_S1_TLBIVA 0x600
#define ARM_SMMU_CB_S1_TLBIASID 0x610
#define ARM_SMMU_CB_S1_TLBIVAL 0x620
struct device *dev, int start);
void (*write_s2cr)(struct arm_smmu_device *smmu, int idx);
void (*write_sctlr)(struct arm_smmu_device *smmu, int idx, u32 reg);
+ void (*probe_finalize)(struct arm_smmu_device *smmu, struct device *dev);
};
#define INVALID_SMENDX -1
struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */
};
+struct acpi_dep_data {
+ struct list_head node;
+ acpi_handle supplier;
+ acpi_handle consumer;
+};
+
/* Performance Management */
struct acpi_device_perf_flags {
*/
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
-struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
-void acpi_bus_put_acpi_device(struct acpi_device *adev);
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);
/* helper */
-bool acpi_dma_supported(struct acpi_device *adev);
+bool acpi_dma_supported(const struct acpi_device *adev);
enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
+ int acpi_iommu_fwspec_init(struct device *dev, u32 id,
+ struct fwnode_handle *fwnode,
+ const struct iommu_ops *ops);
int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
u64 *size);
int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);
+void acpi_dev_clear_dependencies(struct acpi_device *supplier);
+struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier);
struct acpi_device *
acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
struct acpi_device *
{
put_device(&adev->dev);
}
+
+struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
+
+static inline void acpi_bus_put_acpi_device(struct acpi_device *adev)
+{
+ acpi_dev_put(adev);
+}
#else /* CONFIG_ACPI */
static inline int register_acpi_bus_type(void *bus) { return 0; }
union acpi_subtable_headers {
struct acpi_subtable_header common;
struct acpi_hmat_structure hmat;
+ struct acpi_prmt_module_header prmt;
};
typedef int (*acpi_tbl_table_handler)(struct acpi_table_header *table);
#ifdef CONFIG_ARM64
void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa);
+ void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size);
#else
static inline void
acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { }
+ static inline void
+ acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size) { }
#endif
int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);
#define OSC_SB_OSLPI_SUPPORT 0x00000100
#define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT 0x00001000
#define OSC_SB_GENERIC_INITIATOR_SUPPORT 0x00002000
+#define OSC_SB_PRM_SUPPORT 0x00020000
#define OSC_SB_NATIVE_USB4_SUPPORT 0x00040000
extern bool osc_sb_apei_support_acked;
const struct device_driver *drv);
int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
int acpi_device_modalias(struct device *, char *, int);
-void acpi_walk_dep_device_list(acpi_handle handle);
struct platform_device *acpi_create_platform_device(struct acpi_device *,
struct property_entry *);
}
#endif
+int acpi_get_local_address(acpi_handle handle, u32 *addr);
+
#else /* !CONFIG_ACPI */
#define acpi_disabled 1
return false;
}
-static inline struct acpi_device *to_acpi_device_node(struct fwnode_handle *fwnode)
+static inline struct acpi_device *to_acpi_device_node(const struct fwnode_handle *fwnode)
{
return NULL;
}
return false;
}
-static inline struct acpi_data_node *to_acpi_data_node(struct fwnode_handle *fwnode)
+static inline struct acpi_data_node *to_acpi_data_node(const struct fwnode_handle *fwnode)
{
return NULL;
}
-static inline bool acpi_data_node_match(struct fwnode_handle *fwnode,
+static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
const char *name)
{
return false;
return NULL;
}
-static inline bool acpi_dma_supported(struct acpi_device *adev)
+static inline bool acpi_dma_supported(const struct acpi_device *adev)
{
return false;
}
return NULL;
}
+static inline int acpi_get_local_address(acpi_handle handle, u32 *addr)
+{
+ return -ENODEV;
+}
+
#endif /* !CONFIG_ACPI */
#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
int acpi_subsys_runtime_suspend(struct device *dev);
int acpi_subsys_runtime_resume(struct device *dev);
int acpi_dev_pm_attach(struct device *dev, bool power_on);
+bool acpi_storage_d3(struct device *dev);
#else
static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; }
static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; }
{
return 0;
}
+static inline bool acpi_storage_d3(struct device *dev)
+{
+ return false;
+}
#endif
#if defined(CONFIG_ACPI) && defined(CONFIG_PM_SLEEP)
#if defined(CONFIG_ACPI) && defined(CONFIG_GPIOLIB)
bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
struct acpi_resource_gpio **agpio);
+bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
+ struct acpi_resource_gpio **agpio);
int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index);
#else
static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
{
return false;
}
+static inline bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
+ struct acpi_resource_gpio **agpio)
+{
+ return false;
+}
static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev,
const char *name, int index)
{
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