Linaro-acpi February 2015

linaro-acpi@lists.linaro.org

30 participants
22 discussions

[PATCH v8 00/21] Introduce ACPI for ARM64 based on ACPI 5.1

by Hanjun Guo

Hi, This is the v8 of ACPI core patches for ARM64 based on ACPI 5.1, there are some updates since v7: - Add two more documantation to explain why we need ACPI in ARM64 servers by Grant, and recommendations and prohibitions on the use of the numerous ACPI tables and objects by Al Stone. - Add two patches which is need to map acpi tables after acpi_gbl_permanent_mmap is set - Add another patch "dt / chosen: Add linux,uefi-stub-generated-dtb property" to address that if firmware providing no dtb, we can try ACPI configuration data even if no "acpi=force" is passed in early parameters. (I think ACPI for XEN and kexec need consider sperately as disscussed, correct me if I'm wrong). - Add CC in the patch to the subsystem maintainers and modify the subject of the patch to explicitly show the subsystem touched by this patch set, please help us to review and ack them if they make sense, thanks. - Add Tested-by from Qualcomm and Redhat; - Make ACPI depends on PCI suggested by Catalin; - Clean up SMP init function as Lorenzo suggested, remove physical CPU hot-plug code in the patch; - Address some comments from Marc and explicitly state that will implment statcked irqdomain and GIC init framework when GICv3 and ITS, GICv2m are implemented; - Rebased on top of 3.19-rc7. previous version is here: v7: https://lkml.org/lkml/2015/1/14/586 v6: https://lkml.org/lkml/2015/1/4/40 Any comments are welcome :) Thanks Hanjun Al Stone (4): ARM64 / ACPI: Get RSDP and ACPI boot-time tables ARM64 / ACPI: Introduce early_param for "acpi" and pass acpi=force to enable ACPI ARM64 / ACPI: Select ACPI_REDUCED_HARDWARE_ONLY if ACPI is enabled on ARM64 arm64: ACPI: additions of ACPI documentation for arm64 Graeme Gregory (6): acpi: add arm64 to the platforms that use ioremap ACPI / sleep: Introduce sleep_arm.c ARM64 / ACPI: If we chose to boot from acpi then disable FDT ARM64 / ACPI: Get PSCI flags in FADT for PSCI init ARM64 / ACPI: Enable ARM64 in Kconfig Documentation: ACPI for ARM64 Hanjun Guo (8): ARM64 / ACPI: Introduce PCI stub functions for ACPI dt / chosen: Add linux,uefi-stub-generated-dtb property ARM64 / ACPI: Disable ACPI if FADT revision is less than 5.1 ACPI / table: Print GIC information when MADT is parsed ARM64 / ACPI: Parse MADT for SMP initialization ACPI / processor: Make it possible to get CPU hardware ID via GICC ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi clocksource / arch_timer: Parse GTDT to initialize arch timer Mark Salter (2): acpi: fix acpi_os_ioremap for arm64 arm64: allow late use of early_ioremap Tomasz Nowicki (1): irqchip: Add GICv2 specific ACPI boot support Documentation/arm/uefi.txt | 3 + Documentation/arm64/acpi_object_usage.txt | 592 ++++++++++++++++++++++++++++++ Documentation/arm64/arm-acpi.txt | 506 +++++++++++++++++++++++++ Documentation/arm64/why_use_acpi.txt | 231 ++++++++++++ Documentation/kernel-parameters.txt | 3 +- arch/arm64/Kconfig | 3 + arch/arm64/include/asm/acenv.h | 18 + arch/arm64/include/asm/acpi.h | 103 ++++++ arch/arm64/include/asm/cpu_ops.h | 1 + arch/arm64/include/asm/fixmap.h | 3 + arch/arm64/include/asm/pci.h | 6 + arch/arm64/include/asm/psci.h | 3 +- arch/arm64/include/asm/smp.h | 5 +- arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/acpi.c | 362 ++++++++++++++++++ arch/arm64/kernel/cpu_ops.c | 2 +- arch/arm64/kernel/pci.c | 25 ++ arch/arm64/kernel/psci.c | 78 ++-- arch/arm64/kernel/setup.c | 58 ++- arch/arm64/kernel/smp.c | 2 +- arch/arm64/kernel/time.c | 7 + drivers/acpi/Kconfig | 3 +- drivers/acpi/Makefile | 4 + drivers/acpi/bus.c | 3 + drivers/acpi/osl.c | 6 +- drivers/acpi/processor_core.c | 37 ++ drivers/acpi/sleep_arm.c | 28 ++ drivers/acpi/tables.c | 43 +++ drivers/clocksource/arm_arch_timer.c | 132 +++++-- drivers/firmware/efi/libstub/fdt.c | 8 + drivers/irqchip/irq-gic.c | 102 +++++ drivers/irqchip/irqchip.c | 3 + include/acpi/acpi_io.h | 6 + include/linux/acpi.h | 16 + include/linux/clocksource.h | 6 + include/linux/irqchip/arm-gic-acpi.h | 31 ++ 36 files changed, 2374 insertions(+), 66 deletions(-) create mode 100644 Documentation/arm64/acpi_object_usage.txt create mode 100644 Documentation/arm64/arm-acpi.txt create mode 100644 Documentation/arm64/why_use_acpi.txt create mode 100644 arch/arm64/include/asm/acenv.h create mode 100644 arch/arm64/include/asm/acpi.h create mode 100644 arch/arm64/kernel/acpi.c create mode 100644 drivers/acpi/sleep_arm.c create mode 100644 include/linux/irqchip/arm-gic-acpi.h -- 1.9.1

11 years

[PATCH 0/6] PCI: MMCONFIG clean up

by Tomasz Nowicki

MMCFG ACPI table has no arch dependencies so it can be used across all architectures. Currently MMCONFIG related code resides in arch/x86 directories. This patch set is goint to isolate non-architecure specific code and make it accessible from drivers/pci/ directory. Tomasz Nowicki (6): x86, acpi, pci: Reorder logic of pci_mmconfig_insert() function x86, acpi, pci: Move arch-agnostic MMCFG code out of arch/x86/ directory x86, acpi, pci: Move PCI config space accessors. x86, acpi, pci: mmconfig_{32,64}.c code refactoring - remove code duplication. x86, acpi, pci: mmconfig_64.c becomes default implementation for arch agnostic low-level direct PCI config space accessors via MMCONFIG. pci, acpi: Share ACPI PCI config space accessors. arch/x86/include/asm/pci.h | 42 +++++ arch/x86/include/asm/pci_x86.h | 72 -------- arch/x86/pci/Makefile | 5 +- arch/x86/pci/acpi.c | 1 + arch/x86/pci/init.c | 1 + arch/x86/pci/mmconfig-shared.c | 242 ++++--------------------- arch/x86/pci/mmconfig_32.c | 11 +- arch/x86/pci/mmconfig_64.c | 153 ---------------- drivers/acpi/Makefile | 1 + drivers/acpi/bus.c | 1 + drivers/acpi/mmconfig.c | 396 +++++++++++++++++++++++++++++++++++++++++ include/linux/mmconfig.h | 62 +++++++ include/linux/pci.h | 8 - 13 files changed, 541 insertions(+), 454 deletions(-) delete mode 100644 arch/x86/pci/mmconfig_64.c create mode 100644 drivers/acpi/mmconfig.c create mode 100644 include/linux/mmconfig.h -- 1.9.1

11 years

[PATCH] ARM64 / ACPI: Introduce early_param "acpi=" to enable/disable ACPI

by Ard Biesheuvel

Per the request of Hanjun, and due to my involvement in the discussion regarding adding /chosen node properties to the EFI stub<->kernel interface, here is a patch that implements the policy that we discussed, i.e., to enable ACPI explicitly if acpi=force is set, and to enable it implicitly if the device tree has no nodes at depth 1 other than the /chosen node (in which case the device tree is considered to be empty). We did not discuss the acpi=off case, but this patch changes its handling from 'enable ACPI implicitly if the EFI stub generated the DTB' (which is what Hanjun implemented) to 'ACPI is disabled period' (which is arguably more appropriate) This patch replaces the following two patches ARM64 / ACPI: Introduce early_param for "acpi" and pass acpi=force to enable ACPI dt / chosen: Add linux,uefi-stub-generated-dtb property -------------->8------------------ This implements the following policy to decide whether ACPI should be used to boot the system: - acpi=off: ACPI will not be used to boot the system, even if there is no alternative available (e.g., device tree is empty) - acpi=force: only ACPI will be used to boot the system; if that fails, there will be no fallback to alternative methods (such as device tree) - otherwise, ACPI will be used as a fallback if the device tree turns out to lack a platform description; the heuristic to decide this is whether /chosen is the only node present at depth 1 CC: Catalin Marinas <catalin.marinas(a)arm.com> CC: Will Deacon <will.deacon(a)arm.com> CC: Rafael J. Wysocki <rjw(a)rjwysocki.net> Signed-off-by: Al Stone <al.stone(a)linaro.org> Signed-off-by: Graeme Gregory <graeme.gregory(a)linaro.org> Signed-off-by: Hanjun Guo <hanjun.guo(a)linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel(a)linaro.org> --- Documentation/kernel-parameters.txt | 3 ++- arch/arm64/kernel/acpi.c | 54 +++++++++++++++++++++++++++++++++---- 2 files changed, 51 insertions(+), 6 deletions(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 176d4fe4f076..d6a952ec4433 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -165,7 +165,7 @@ multipliers 'Kilo', 'Mega', and 'Giga', equalling 2^10, 2^20, and 2^30 bytes respectively. Such letter suffixes can also be entirely omitted. - acpi= [HW,ACPI,X86] + acpi= [HW,ACPI,X86,ARM64] Advanced Configuration and Power Interface Format: { force | off | strict | noirq | rsdt } force -- enable ACPI if default was off @@ -175,6 +175,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. strictly ACPI specification compliant. rsdt -- prefer RSDT over (default) XSDT copy_dsdt -- copy DSDT to memory + For ARM64, ONLY "acpi=off" or "acpi=force" are available See also Documentation/power/runtime_pm.txt, pci=noacpi diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 7f67c011261b..732ad0d075f5 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -20,15 +20,49 @@ #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/memblock.h> +#include <linux/of_fdt.h> #include <linux/smp.h> -int acpi_noirq; /* skip ACPI IRQ initialization */ -int acpi_disabled; +int acpi_noirq = 1; /* skip ACPI IRQ initialization */ +int acpi_disabled = 1; EXPORT_SYMBOL(acpi_disabled); -int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ +int acpi_pci_disabled = 1; /* skip ACPI PCI scan and IRQ initialization */ EXPORT_SYMBOL(acpi_pci_disabled); +static bool __initdata param_acpi_off; +static bool __initdata param_acpi_force; + +static int __init parse_acpi(char *arg) +{ + if (!arg) + return -EINVAL; + + /* "acpi=off" disables both ACPI table parsing and interpreter */ + if (strcmp(arg, "off") == 0) + param_acpi_off = true; + else if (strcmp(arg, "force") == 0) /* force ACPI to be enabled */ + param_acpi_force = true; + else + return -EINVAL; /* Core will print when we return error */ + + return 0; +} +early_param("acpi", parse_acpi); + +static int __init dt_scan_depth1_nodes(unsigned long node, + const char *uname, int depth, + void *data) +{ + /* + * Return 1 as soon as we encounter a node at depth 1 that is + * not the /chosen node. + */ + if (depth == 1 && (strcmp(uname, "chosen") != 0)) + return 1; + return 0; +} + /* * __acpi_map_table() will be called before page_init(), so early_ioremap() * or early_memremap() should be called here to for ACPI table mapping. @@ -59,10 +93,20 @@ void __init __acpi_unmap_table(char *map, unsigned long size) */ void __init acpi_boot_table_init(void) { - /* If acpi_disabled, bail out */ - if (acpi_disabled) + /* + * Enable ACPI instead of device tree unless + * - ACPI has been disabled explicitly (acpi=off), or + * - the device tree is not empty (it has more than just a /chosen node) + * and ACPI has not been force enabled (acpi=force) + */ + if (param_acpi_off || + (!param_acpi_force && of_scan_flat_dt(dt_scan_depth1_nodes, NULL))) return; + acpi_disabled = 0; + acpi_pci_disabled = 0; + acpi_noirq = 0; + /* Initialize the ACPI boot-time table parser. */ if (acpi_table_init()) disable_acpi(); -- 1.8.3.2

11 years

leg-kernel tag leg-20150216.0 released

by Graeme Gregory

The leg-kernel release has been made and tagged as leg-20150216.0 This is based on mainline kernel v3.19 Repository : http://git.linaro.org/leg/acpi/leg-kernel.git Direct Link: https://git.linaro.org/leg/acpi/leg-kernel.git/commit/2eaf1f1ee1d722cacf15f… Notes :- 1) This release only supports Juno/FVP until updated topics for Seattle and Mustang are available. 2) This release incorporates the SBSA UART support for pl011 driver from Andre Przywara. This means that your console will become ttyAMA0 (console=ttyAMA0) on Juno/FVP. It also means to run FVP model you need these options :- -C bp.pl011_uart0.untimed_fifos=0 -C bp.pl011_uart0.revision="r1p5"

11 years

Re: [Linaro-acpi] [PATCH v8 00/21] Introduce ACPI for ARM64 based on ACPI 5.1

by Jonathan (Zhixiong) Zhang

On 02/02/2015 05:45 AM, Hanjun Guo wrote: > From: Al Stone <al.stone at linaro.org> > > Two more documentation files are also being added: > (1) A verbatim copy of the "Why ACPI on ARM?" blog posting by Grant Likely, > which is also summarized in arm-acpi.txt, and > > (2) A section by section review of the ACPI spec (acpi_object_usage.txt) > to note recommendations and prohibitions on the use of the numerous > ACPI tables and objects. This sets out the current expectations of > the firmware by Linux very explicitly (or as explicitly as I can, for > now). > [snip....] > +ERST Section 18.5 (signature == "ERST") > + == Error Record Serialization Table == > + Must be supplied if RAS support is provided by the platform. It > + is recommended this table be supplied. The above text related to ERST table could lead to misunderstanding. Following is what the ACPI spec (section 18.5) says: "The error record serialization feature is used to save and retrieve hardware error information to and from a persistent store. OSPM interacts with the platform through a platform interface. On UEFI-based platforms, the UEFI runtime variable services can be used to carry out error record persistence operations. On non-UEFI based platforms, the ACPI solution described below is used." When RAS support is provided by the platform, ERST table may not be supplied when it is UEFI-based and when UEFI run time service provides the ability to save and retrieve hardware error information to and from a persistent store (UEFI spec section 7.2.3). Therefore, following text might be more accurate: " On a platform supports RAS, this table must be supplied if it is not UEFI-based; if it is UEFI-based, this table may be supplied, consult your firmware vendor if you are not sure. When this table is not present, UEFI run time service will be utilized to save and retrieve hardware error information to and from a persistent store." ==== Jonathan (Zhixiong) Zhang Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.

11 years

[V3 PATCH 0/2] Introduce ACPI support for ahci_platform driver

by Suravee Suthikulpanit

This patch series introduce ACPI support for non-PCI AHCI platform driver. Existing ACPI support for AHCI assumes the device controller is a PCI device. Also, since there is no ACPI _HID/_CID for generic AHCI controller, the driver could not use them for matching devices. Therefore, this patch introduces a mechanism for drivers to match devices using ACPI _CLS method. This patch series is rebased from and tested with: http://git.linaro.org/leg/acpi/acpi.git acpi-5.1-v8 This topic was discussed earlier here (as part of introducing support for AMD Seattle SATA controller): http://marc.info/?l=linux-arm-kernel&m=141083492521584&w=2 Changes from V2 (https://lkml.org/lkml/2015/1/5/662) * Update with review comment from Rafael in patch 1/2 * Rebased and tested with acpi-5.1-v8 Changes from V1 (https://lkml.org/lkml/2014/12/19/345) * Rebased to 3.19.0-rc2 * Change from acpi_cls in device_driver to acpi_match_cls (Hanjun comment) * Change the matching logic in acpi_driver_match_device() due to the new special PRP0001 _HID. * Simplify the return type of acpi_match_device_cls() to boolean. Changes from RFC (https://lkml.org/lkml/2014/12/17/446) * Remove #ifdef and make non-ACPI version of the acpi_match_device_cls as inline. (per Arnd) * Simplify logic to retrieve and evaluate _CLS handle. (per Hanjun) Suravee Suthikulpanit (2): ACPI / scan: Add support for ACPI _CLS device matching ata: ahci_platform: Add ACPI _CLS matching drivers/acpi/scan.c | 75 +++++++++++++++++++++++++++++++++++++++-- drivers/ata/Kconfig | 2 +- drivers/ata/ahci_platform.c | 3 ++ include/acpi/acnames.h | 1 + include/linux/acpi.h | 10 ++++++ include/linux/device.h | 1 + include/linux/mod_devicetable.h | 6 ++++ 7 files changed, 94 insertions(+), 4 deletions(-) -- 2.1.0

11 years

[V2 PATCH 0/2] Introduce ACPI support for ahci_platform driver

by Suravee Suthikulpanit

This patch series introduce ACPI support for non-PCI AHCI platform driver. Existing ACPI support for AHCI assumes the device controller is a PCI device. Also, since there is no ACPI _HID/_CID for generic AHCI controller, the driver could not use them for matching devices. Therefore, this patch introduces a mechanism for drivers to match devices using ACPI _CLS method. This patch series is rebased from and tested with: http://git.linaro.org/leg/acpi/acpi.git acpi-5.1-v7 This topic was discussed earlier here (as part of introducing support for AMD Seattle SATA controller): http://marc.info/?l=linux-arm-kernel&m=141083492521584&w=2 NOTE: * PATCH 2/2 has already been Acked-by Tejun Heo in V1. I only made a minor renaming of the acpi_cls to acpi_match_cls for clarity in V2. It probably should be routed together with the PATCH 1/2 (once acked) since it defines the new member in the struct. Changes V1 (https://lkml.org/lkml/2014/12/19/345) * Rebased to 3.19.0-rc2 * Change from acpi_cls in device_driver to acpi_match_cls (Hanjun comment) * Change the matching logic in acpi_driver_match_device() due to the new special PRP0001 _HID. * Simplify the return type of acpi_match_device_cls() to boolean. Changes from RFC (https://lkml.org/lkml/2014/12/17/446) * Remove #ifdef and make non-ACPI version of the acpi_match_device_cls as inline. (per Arnd) * Simplify logic to retrieve and evaluate _CLS handle. (per Hanjun) Suravee Suthikulpanit (2): ACPI / scan: Add support for ACPI _CLS device matching ata: ahci_platform: Add ACPI _CLS matching drivers/acpi/scan.c | 79 +++++++++++++++++++++++++++++++++++++++-- drivers/ata/Kconfig | 2 +- drivers/ata/ahci_platform.c | 3 ++ include/acpi/acnames.h | 1 + include/linux/acpi.h | 10 ++++++ include/linux/device.h | 1 + include/linux/mod_devicetable.h | 6 ++++ 7 files changed, 98 insertions(+), 4 deletions(-) -- 1.9.3

11 years

[PATCH] ACPI / table: remove duplicate NULL check for the handler of acpi_table_parse()

by Hanjun Guo

In acpi_table_parse(), pointer of the table to pass to handler() is checked before handler() called, so remove all the duplicate NULL check in the handler function. CC: Tony Luck <tony.luck(a)intel.com> CC: Thomas Gleixner <tglx(a)linutronix.de> Signed-off-by: Hanjun Guo <hanjun.guo(a)linaro.org> --- arch/ia64/kernel/acpi.c | 6 ------ arch/x86/kernel/acpi/boot.c | 16 ++-------------- drivers/acpi/numa.c | 12 ++---------- 3 files changed, 4 insertions(+), 30 deletions(-) diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c index e795cb8..2c44989 100644 --- a/arch/ia64/kernel/acpi.c +++ b/arch/ia64/kernel/acpi.c @@ -380,9 +380,6 @@ static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) static int __init acpi_parse_madt(struct acpi_table_header *table) { - if (!table) - return -EINVAL; - acpi_madt = (struct acpi_table_madt *)table; acpi_madt_rev = acpi_madt->header.revision; @@ -645,9 +642,6 @@ static int __init acpi_parse_fadt(struct acpi_table_header *table) struct acpi_table_header *fadt_header; struct acpi_table_fadt *fadt; - if (!table) - return -EINVAL; - fadt_header = (struct acpi_table_header *)table; if (fadt_header->revision != 3) return -ENODEV; /* Only deal with ACPI 2.0 FADT */ diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index b9e30da..14d3652 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -843,13 +843,7 @@ int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) static int __init acpi_parse_sbf(struct acpi_table_header *table) { - struct acpi_table_boot *sb; - - sb = (struct acpi_table_boot *)table; - if (!sb) { - printk(KERN_WARNING PREFIX "Unable to map SBF\n"); - return -ENODEV; - } + struct acpi_table_boot *sb = (struct acpi_table_boot *)table; sbf_port = sb->cmos_index; /* Save CMOS port */ @@ -863,13 +857,7 @@ static struct resource *hpet_res __initdata; static int __init acpi_parse_hpet(struct acpi_table_header *table) { - struct acpi_table_hpet *hpet_tbl; - - hpet_tbl = (struct acpi_table_hpet *)table; - if (!hpet_tbl) { - printk(KERN_WARNING PREFIX "Unable to map HPET\n"); - return -ENODEV; - } + struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { printk(KERN_WARNING PREFIX "HPET timers must be located in " diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index 24b5476..1333cbdc 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -177,12 +177,7 @@ static int __init slit_valid(struct acpi_table_slit *slit) static int __init acpi_parse_slit(struct acpi_table_header *table) { - struct acpi_table_slit *slit; - - if (!table) - return -EINVAL; - - slit = (struct acpi_table_slit *)table; + struct acpi_table_slit *slit = (struct acpi_table_slit *)table; if (!slit_valid(slit)) { printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n"); @@ -260,11 +255,8 @@ acpi_parse_memory_affinity(struct acpi_subtable_header * header, static int __init acpi_parse_srat(struct acpi_table_header *table) { - struct acpi_table_srat *srat; - if (!table) - return -EINVAL; + struct acpi_table_srat *srat = (struct acpi_table_srat *)table; - srat = (struct acpi_table_srat *)table; acpi_srat_revision = srat->header.revision; /* Real work done in acpi_table_parse_srat below. */ -- 1.9.1

11 years, 1 month

[PATCH] acpi: move sleep_arm to architecure specific directory

by Graeme Gregory

There is no reason this file cannot be an arm64 specific stub holder so move the file and change the Kconfig to match. Signed-off-by: Graeme Gregory <graeme.gregory(a)linaro.org> --- arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/acpi_sleep.c | 28 ++++++++++++++++++++++++++++ drivers/acpi/Makefile | 4 +--- drivers/acpi/sleep_arm.c | 28 ---------------------------- 4 files changed, 30 insertions(+), 32 deletions(-) create mode 100644 arch/arm64/kernel/acpi_sleep.c delete mode 100644 drivers/acpi/sleep_arm.c diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 8bdc6bd..f2c488b 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -34,7 +34,7 @@ arm64-obj-$(CONFIG_KGDB) += kgdb.o arm64-obj-$(CONFIG_EFI) += efi.o efi-stub.o efi-entry.o arm64-obj-$(CONFIG_PCI) += pci.o arm64-obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o -arm64-obj-$(CONFIG_ACPI) += acpi.o +arm64-obj-$(CONFIG_ACPI) += acpi.o acpi_sleep.o obj-y += $(arm64-obj-y) vdso/ obj-m += $(arm64-obj-m) diff --git a/arch/arm64/kernel/acpi_sleep.c b/arch/arm64/kernel/acpi_sleep.c new file mode 100644 index 0000000..54578ef --- /dev/null +++ b/arch/arm64/kernel/acpi_sleep.c @@ -0,0 +1,28 @@ +/* + * ARM64 Specific Sleep Functionality + * + * Copyright (C) 2013-2014, Linaro Ltd. + * Author: Graeme Gregory <graeme.gregory(a)linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/acpi.h> + +/* + * Currently the ACPI 5.1 standard does not define S states in a + * manner which is usable for ARM64. These two stubs are sufficient + * that system initialises and device PM works. + */ +u32 acpi_target_system_state(void) +{ + return ACPI_STATE_S0; +} +EXPORT_SYMBOL_GPL(acpi_target_system_state); + +int __init acpi_sleep_init(void) +{ + return -ENOSYS; +} diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index bcec54e..753785d 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -23,9 +23,7 @@ acpi-y += nvs.o # Power management related files acpi-y += wakeup.o -ifeq ($(ARCH), arm64) -acpi-y += sleep_arm.o -else # X86, IA64 +ifneq (,$(findstring $(ARCH),x86 ia64)) acpi-y += sleep.o endif acpi-y += device_pm.o diff --git a/drivers/acpi/sleep_arm.c b/drivers/acpi/sleep_arm.c deleted file mode 100644 index 54578ef..0000000 --- a/drivers/acpi/sleep_arm.c +++ /dev/null @@ -1,28 +0,0 @@ -/* - * ARM64 Specific Sleep Functionality - * - * Copyright (C) 2013-2014, Linaro Ltd. - * Author: Graeme Gregory <graeme.gregory(a)linaro.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/acpi.h> - -/* - * Currently the ACPI 5.1 standard does not define S states in a - * manner which is usable for ARM64. These two stubs are sufficient - * that system initialises and device PM works. - */ -u32 acpi_target_system_state(void) -{ - return ACPI_STATE_S0; -} -EXPORT_SYMBOL_GPL(acpi_target_system_state); - -int __init acpi_sleep_init(void) -{ - return -ENOSYS; -} -- 2.1.4

11 years, 1 month

[PATCH v2 0/5] Start deprecating _OSI on new architectures

by al.stone＠linaro.org

From: Al Stone <al.stone(a)linaro.org> The use of the ACPI _OSI method in Linux has a long and sordid history. Instead of perpetuating past complications on new architectures, the consensus amongst those writing the ACPI specification and those using it seems to be to ultimately deprecate the use of _OSI. A change request has been submitted (but not yet decided upon) to modify the ACPI specification accordingly. In the meantime, these patches rearrange the implementation of _OSI so that it can be deprecated, or ultimately removed completely, on at least arm64 platforms. This is done by separating out the _OSI implementation and moving it into a new file. For x86 and ia64, there is no change in functionality. But, this allows us to provide a separate implementation of _OSI for arm64 that generates a warning that it has been deprecated, and always returns false; i.e., that the capability being queried for, whether OS name or functionality, is not supported. This is the first four of the patches. The final patch changes the default value for the _OS_ method for arm64 only. Since there is no need to pretend to be older versions of Windows, or any other OS at all, the _OS_ method will return "Linux" on arm64. One can still use the acpi_os_name kernel parameter if there is a need to use some other value. The first three patches do not depend on arm64 support for ACPI and could be used independently. The last two patches make much more sense when used in conjunction with Hanjun's patches for ACPI 5.1 on arm64 [0]. These have been through some simple testing on two different x86 laptops, and all seems well (Lenovo t440s and t430s ThinkPads). The arm64 code has been tested on an AMD Seattle system. Unfortunately, for ia64, all I could do was cross-compile the code; I have no access to hardware to test on. NB: the first two patches do not pass checkpatch.pl; since this is existing code being moved, I have not repaired the reported errors for now, but will do so once the disposition of these patches have been resolved. Changes in v2: -- significant simplification based on Rafael's comments -- ACPI spec change request has now been submitted [0] https://lkml.org/lkml/2015/2/2/261 Al Stone (4): ACPI: move acpi_os_handler() so it can be made arch-dependent later ACPI: move _OSI support functions to allow arch-dependent implementation ACPI: add arch-specific compilation for _OSI and the blacklist ACPI: arm64: use the arch-specific ACPI _OSI method and ACPI blacklist Hanjun Guo (1): ACPI: arm64: use "Linux" as ACPI_OS_NAME for _OS on arm64 arch/arm64/Kconfig | 7 ++ drivers/acpi/Kconfig | 22 ++++ drivers/acpi/Makefile | 17 +++ drivers/acpi/blacklist-arm.c | 20 ++++ drivers/acpi/blacklist.c | 9 ++ drivers/acpi/osi-arm.c | 25 ++++ drivers/acpi/osi.c | 255 ++++++++++++++++++++++++++++++++++++++++ drivers/acpi/osl.c | 217 ---------------------------------- include/acpi/acconfig.h | 2 + include/acpi/platform/aclinux.h | 4 + include/linux/acpi.h | 4 +- 11 files changed, 362 insertions(+), 220 deletions(-) create mode 100644 drivers/acpi/blacklist-arm.c create mode 100644 drivers/acpi/osi-arm.c create mode 100644 drivers/acpi/osi.c -- 2.1.0

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Linaro-acpi February 2015