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doc: add x86 and core kernel release notes

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Add x86 and core kernel release notes for 2.2.0.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
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Andrew Boie 2020-03-04 08:33:12 -08:00 • committed by Johan Hedberg
commit 8d5bb88aa7
1 changed files with 40 additions and 2 deletions
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doc/releases/release-notes-2.2.rst
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@ -134,7 +134,33 @@ Removed APIs in this release
Kernel
******
* <TBD>
* Addressed some race conditions observed on SMP-enabled systems
* Propagate a distinct error code if a workqueue item is submitted that
has already been completed
* Disable preemption when handing fatal errors
* Fix an issue with the sytsem call stack frame if the system call is
preempted and then later tries to Z_OOPS()
* add k_thread_stack_space_get() system call for analyzing thread stack
space. Older methods which had problems in some cases or on some
architectures like STACK_ANALYZE() are now deprecated.
* Many kernel object APIs now optionally return runtime error values
instead of relying on assertions. Whether these return values, fail
assertions, or do no checking at all is controlled by the new
Kconfig options ASSERT_ON_ERRORS, NO_RUNTIME_CHECKS, RUNTIME_ERROR_CHECKS.
* Cleanups to the arch_cpu_start() API
* Spinlock validation now dumps the address of the incorrectly used spinlock
* Various improvements to the assertion mechanism
* k_poll() may be passed 0 events, in which case it just puts the caller to
sleep
* Add k_thread_foreach_unlocked() API
* Add an assertion if k_sleep() is called from an ISR
* Numerous 64-bit fixes, mostly related to data type sizes
* k_mutex_unlock() is now correctly a rescheduling point
* Calling k_thread_suspend() on the current thread now correctly invokes
the scheduler
* Calling k_thread_suspend() on any thread cancels any pending timeouts for
that thread
* Fix edge case in meta-IRQ preemption of co-operative threads
Architectures
*************
@ -165,7 +191,19 @@ Architectures
* x86:
* <TBD>
* Fix an issue with Kconfig values larger than INT_MAX
* Fix an issue where callee-saved registers could be unnecessarily
saved on the stack when handling exceptions on x86_64
* Fix a potential race with saving RFLAGS on context switch on x86_64
* Enable 64-bit mode and X2APIC for the 'acrn' target
* Add a poison value of 0xB9 to RIP if a thread is dispatched on multiple
cores
* Implement CONFIG_USERSPACE on x86_64
* Fix an issue where reserved memory could be overwritten when loading the
Zephyr image on qemu_x86_64
* x86_64 will now exit QEMU when encountering a fatal error, much like
32-bit already does
* Cleanups and improvements to exception debug messages
Boards & SoC Support
********************