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Diffstat (limited to 'changes.txt')
| -rw-r--r-- | changes.txt | 97 |
1 files changed, 95 insertions, 2 deletions
diff --git a/changes.txt b/changes.txt index 3c60c27d366b8..e7cc572a0cc34 100644 --- a/changes.txt +++ b/changes.txt @@ -1,6 +1,94 @@ ---------------------------------------- +13 November 2020. Summary of changes for version 20201113: + +This release is available at https://acpica.org/downloads + + +1) ACPICA kernel-resident subsystem: + +Interpreter: fixed a memory leak by using use existing buffer in _HID +repair. There was a memory leak that occurred when a _CID object is +defined as a package containing string objects. When _CID is checked for +any possible repairs, it calls a helper function to repair _HID (because +_CID basically contains multiple _HID entries). The _HID repair function +assumes that string objects are standalone objects that are not contained +inside of any packages. The _HID repair function replaced the string +object with a brand new object and attempted to delete the old object by +decrementing the reference count of the old object. Strings inside of +packages have a reference count of 2 so the _HID repair function leaves +this object in a dangling state and causes a memory leak. Instead of +allocating a brand new object and removing the old object, use the +existing object when repairing the _HID object. + +Added function trace macros to improve namespace debugging. The namespace +repair mechanism does not have function tracing macros. Add several trace +macros to improve debuggability. + +Handle "orphan" _REG methods for GPIO OpRegions. Before this change +AcpiEvExecuteRegMethods() had special handling to handle "orphan" (no +matching OpRegion declared) _REG methods for EC nodes. On Intel Cherry +Trail devices there are 2 possible ACPI OpRegions for accessing GPIOs. +The standard GeneralPurposeIo OpRegion and the Cherry Trail - specific +UserDefined 0x9X OpRegions. Having 2 different types of OpRegions leads +to potential issues with checks for OpRegion availability, or in other +words checks if _REG has been called for the OpRegion which the ACPI code +wants to use. Except for the "orphan" EC handling, ACPICA core does not +call _REG on an ACPI node which does not define an OpRegion matching the +type being registered; and the reference design DSDT, from which most +Cherry Trail DSDTs are derived, does not define GeneralPurposeIo, nor +UserDefined(0x93) OpRegions for the GPO2 (UID 3) device, because no pins +were assigned ACPI controlled functions in the reference design. Together +this leads to the perfect storm, at least on the Cherry Trail based +Medion Akayo E1239T. This design does use a GPO2 pin from its ACPI code +and has added the Cherry Trail specific UserDefined(0x93) opregion to its +GPO2 ACPI node to access this pin. But it uses a "has _REG been called" +availability check for the standard GeneralPurposeIo OpRegion. This +clearly is a bug in the DSDT, but this does work under Windows. This +issue leads to the intel vbtn driver reporting the device always being in +tablet-mode at boot, even if it is in laptop mode. Which in turn causes +userspace to ignore touchpad events. So in other words, this issue causes +the touchpad to not work at boot. This change fixes this by extending the +"orphan" _REG method handling to also apply to GPIO address-space +handlers. + + +2) iASL Compiler/Disassembler and ACPICA tools: + +iASL: Added more info to namespace dump file (-ln option). In a separate +section of the dump file (after the main namespace dump), emit the full +pathname for each namespace node, its type, and the ASL filename and line +number where it is declared. + +AcpiHelp: Added an option to display/decode iASL exceptions. Option is: - +x [Hex Value] where "Hex Value" is the iASL exception code. If Hex Value +is omitted, all iASL exceptions are displayed. + +iASL: Use StringLiteral instead of StringData for some ASL macros. The +use of the stringData rule allows for some "string" oriented opcodes +(Such as ToString, ToHexString, etc.) None of which make sense with the +macros in question. This change modifies the StringData part of the rule +for these macros to a simple string literal - thus disallowing the use +of ToString, ToHexString, etc. +The following ASL operators (macros) are affected: +EisaId +Fprintf +Printf +ToUuid +Unicode +Note: The MS compiler requires the use of string literals for these +operators also. + +iASL: Added a remark for an unknown UUID: ASL_MSG_UUID_NOT_FOUND. Search +the list of "known" UUIDs for the input to the ToUUID macro. + +Added 5 new UUIDs to the known UUID table. All related to NVDIMM and the +NFIT table. + + +---------------------------------------- + 25 September 2020. Summary of changes for version 20200925: This release is available at https://acpica.org/downloads @@ -41,7 +129,7 @@ names: _SBT _SBW -AML Disassembler: Added a new command, "All <NameSeg". This command will +AML Disassembler: Added a new command, "All <NameSeg>". This command will evaluate all objects in the current namespace whose NameString contains the input NameSeg as the last element of the NameString. Useful for debugging. @@ -55,6 +143,11 @@ with lengths that exceed the initializer list. iASL: added more detail to external resolution error message when compiling multiple definition blocks. +iASL: added a remark for an attempt to create a nameseg or namestring +containing lower-case letters. This should prevent declaring multiple +namesegs or namestrings in an attempt to refer to different objects (with +different cases), but actually refer to the same object(s). + iASL: improve alias analysis by saving object type. If the alias is a method type, the parameter count is also recorded. @@ -3702,7 +3795,7 @@ iASL compiler, all ACPICA utilities, and the test suites. Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues. A raw gpe handling mechanism was created to allow better handling of GPE storms that aren't easily managed by the normal handler. The raw handler -allows disabling/renabling of the the GPE so that interrupt storms can be +allows disabling/renabling of the GPE so that interrupt storms can be avoided in cases where events cannot be timely serviced. In this scenario, handlers should use the AcpiSetGpe() API to disable/enable the GPE. This API will leave the reference counts undisturbed, thereby |