user/sven/linux.git/include/linux/acpi.h, branch v4.14.259

ACPI: tables: x86: Reserve memory occupied by ACPI tables

2021-05-22T08:57:12Z

commit 1a1c130ab7575498eed5bcf7220037ae09cd1f8a upstream. The following problem has been reported by George Kennedy: Since commit 7fef431be9c9 ("mm/page_alloc: place pages to tail in __free_pages_core()") the following use after free occurs intermittently when ACPI tables are accessed. BUG: KASAN: use-after-free in ibft_init+0x134/0xc49 Read of size 4 at addr ffff8880be453004 by task swapper/0/1 CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc1-7a7fd0d #1 Call Trace: dump_stack+0xf6/0x158 print_address_description.constprop.9+0x41/0x60 kasan_report.cold.14+0x7b/0xd4 __asan_report_load_n_noabort+0xf/0x20 ibft_init+0x134/0xc49 do_one_initcall+0xc4/0x3e0 kernel_init_freeable+0x5af/0x66b kernel_init+0x16/0x1d0 ret_from_fork+0x22/0x30 ACPI tables mapped via kmap() do not have their mapped pages reserved and the pages can be "stolen" by the buddy allocator. Apparently, on the affected system, the ACPI table in question is not located in "reserved" memory, like ACPI NVS or ACPI Data, that will not be used by the buddy allocator, so the memory occupied by that table has to be explicitly reserved to prevent the buddy allocator from using it. In order to address this problem, rearrange the initialization of the ACPI tables on x86 to locate the initial tables earlier and reserve the memory occupied by them. The other architectures using ACPI should not be affected by this change. Link: https://lore.kernel.org/linux-acpi/1614802160-29362-1-git-send-email-george.kennedy@oracle.com/ Reported-by: George Kennedy Tested-by: George Kennedy Signed-off-by: Rafael J. Wysocki Reviewed-by: Mike Rapoport Cc: 5.10+ # 5.10+ Signed-off-by: Greg Kroah-Hartman

ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI

2021-01-23T14:48:43Z

[ Upstream commit ee61cfd955a64a58ed35cbcfc54068fcbd486945 ] It adds a stub acpi_create_platform_device() for !CONFIG_ACPI build, so that caller doesn't have to deal with !CONFIG_ACPI build issue. Reported-by: kernel test robot Signed-off-by: Shawn Guo Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin

ACPI: fix acpi_find_child_device() invocation in acpi_preset_companion()

2019-12-17T19:38:09Z

[ Upstream commit f8c6d1402b89f22a3647705d63cbd171aa19a77e ] acpi_find_child_device() accepts boolean not pointer as last argument. Signed-off-by: Alexey Dobriyan [ rjw: Subject ] Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin

ACPI: fix false-positive -Wuninitialized warning

2019-08-06T17:05:22Z

[ Upstream commit dfd6f9ad36368b8dbd5f5a2b2f0a4705ae69a323 ] clang gets confused by an uninitialized variable in what looks to it like a never executed code path: arch/x86/kernel/acpi/boot.c:618:13: error: variable 'polarity' is uninitialized when used here [-Werror,-Wuninitialized] polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; ^~~~~~~~ arch/x86/kernel/acpi/boot.c:606:32: note: initialize the variable 'polarity' to silence this warning int rc, irq, trigger, polarity; ^ = 0 arch/x86/kernel/acpi/boot.c:617:12: error: variable 'trigger' is uninitialized when used here [-Werror,-Wuninitialized] trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; ^~~~~~~ arch/x86/kernel/acpi/boot.c:606:22: note: initialize the variable 'trigger' to silence this warning int rc, irq, trigger, polarity; ^ = 0 This is unfortunately a design decision in clang and won't be fixed. Changing the acpi_get_override_irq() macro to an inline function reliably avoids the issue. Signed-off-by: Arnd Bergmann Reviewed-by: Andy Shevchenko Reviewed-by: Nathan Chancellor Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin

acpi: Add helper for deactivating memory region

2018-07-08T13:30:46Z

commit d2d2e3c46be5d6dd8001d0eebdf7cafb9bc7006b upstream. Sometimes memory resource may be overlapping with SystemMemory Operation Region by design, for example if the memory region is used as a mailbox for communication with a firmware in the system. One occasion of such mailboxes is USB Type-C Connector System Software Interface (UCSI). With regions like that, it is important that the driver is able to map the memory with the requirements it has. For example, the driver should be allowed to map the memory as non-cached memory. However, if the operation region has been accessed before the driver has mapped the memory, the memory has been marked as write-back by the time the driver is loaded. That means the driver will fail to map the memory if it expects non-cached memory. To work around the problem, introducing helper that the drivers can use to temporarily deactivate (unmap) SystemMemory Operation Regions that overlap with their IO memory. Fixes: 8243edf44152 ("usb: typec: ucsi: Add ACPI driver") Cc: stable@vger.kernel.org Reviewed-by: Rafael J. Wysocki Signed-off-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman

Merge tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2017-09-05T19:50:00Z

Pull device properties framework updates from Rafael Wysocki: "These introduce fwnode operations for all of the separate types of 'firmware nodes' that can be handled by the device properties framework, make the framework use const fwnode arguments all over, add a helper for the consolidated handling of node references and switch over the framework to the new UUID API. Specifics: - Introduce fwnode operations for all of the separate types of 'firmware nodes' that can be handled by the device properties framework and drop the type field from struct fwnode_handle (Sakari Ailus, Arnd Bergmann). - Make the device properties framework use const fwnode arguments where possible (Sakari Ailus). - Add a helper for the consolidated handling of node references to the device properties framework (Sakari Ailus). - Switch over the ACPI part of the device properties framework to the new UUID API (Andy Shevchenko)" * tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: device property: Switch to use new generic UUID API device property: export irqchip_fwnode_ops device property: Introduce fwnode_property_get_reference_args device property: Constify fwnode property API device property: Constify argument to pset fwnode backend ACPI: Constify internal fwnode arguments ACPI: Constify acpi_bus helper functions, switch to macros ACPI: Prepare for constifying acpi_get_next_subnode() fwnode argument device property: Get rid of struct fwnode_handle type field ACPI: Use IS_ERR_OR_NULL() instead of non-NULL check in is_acpi_data_node()

Merge branches 'acpi-sysfs', 'acpi-apei' and 'acpi-blacklist'

2017-09-03T21:55:34Z

* acpi-sysfs: ACPI / sysfs: Extend ACPI sysfs to provide access to boot error region * acpi-apei: ACPI / APEI: Suppress message if HEST not present ACPI, APEI, EINJ: Subtract any matching Register Region from Trigger resources ACPI: APEI: fix the wrong iteration of generic error status block ACPI: APEI: Enable APEI multiple GHES source to share a single external IRQ * acpi-blacklist: intel_pstate: convert to use acpi_match_platform_list() ACPI / blacklist: add acpi_match_platform_list()

Merge branches 'acpi-x86', 'acpi-soc', 'acpi-pmic' and 'acpi-apple'

2017-09-03T21:54:03Z

* acpi-x86: ACPI / boot: Add number of legacy IRQs to debug output ACPI / boot: Correct address space of __acpi_map_table() ACPI / boot: Don't define unused variables * acpi-soc: ACPI / LPSS: Don't abort ACPI scan on missing mem resource * acpi-pmic: ACPI / PMIC: xpower: Do pinswitch magic when reading GPADC * acpi-apple: spi: Use Apple device properties in absence of ACPI resources ACPI / scan: Recognize Apple SPI and I2C slaves ACPI / property: Support Apple _DSM properties ACPI / property: Don't evaluate objects for devices w/o handle treewide: Consolidate Apple DMI checks

Merge branches 'acpi-ec', 'acpi-dma', 'acpi-processor' and 'acpi-cppc'

2017-09-03T21:53:39Z

* acpi-ec: ACPI / EC: Clean up EC GPE mask flag ACPI: EC: Fix possible issues related to EC initialization order * acpi-dma: ACPI/IORT: Add IORT named component memory address limits ACPI: Make acpi_dma_configure() DMA regions aware ACPI: Introduce DMA ranges parsing ACPI: Make acpi_dev_get_resources() method agnostic * acpi-processor: ACPI / processor: make function acpi_processor_check_duplicates() static ACPI: processor: use dev_dbg() instead of dev_warn() when CPPC probe failed * acpi-cppc: mailbox: pcc: Drop uninformative output during boot

ACPI / blacklist: add acpi_match_platform_list()

2017-08-28T23:42:48Z

ACPI OEM ID / OEM Table ID / Revision can be used to identify a platform based on ACPI firmware info. acpi_blacklisted(), intel_pstate_platform_pwr_mgmt_exists(), and some other funcs, have been using similar check to detect a list of platforms that require special handlings. Move the platform check in acpi_blacklisted() to a new common utility function, acpi_match_platform_list(), so that other drivers do not have to implement their own version. There is no change in functionality. Signed-off-by: Toshi Kani Reviewed-by: Borislav Petkov Signed-off-by: Rafael J. Wysocki