It's sufficient to access the boot info only on kernel initialization time.
Therfore, it can remain completely hidden to the rest of the kernel inside
kernel/main.cc in the initialization function.
Ref #4217
This commit introduces the Kernel::Main class that replaces the former way of
initializing the kernel (former 'kernel_init' function) and calling the C++
kernel entry handler (former 'kernel' function). These two are now
'Main::initialize_and_handle_kernel_entry' and 'Main::handle_kernel_entry'.
Also reading the execution time of the idle threads was already moved to
'Main'. The one static Main instance is meant to successivly replace all the
global static objects of the base-hw kernel with data members of the Main
instance making the data model of the kernel much more comprehensible. The
instance and most of its interface are hidden in kernel/main.cc. There are only
rare cases where parts of the Main interface must be accessible from the
outside. This should be done in the most specific way possible (see main.h)
and, if possible, without handing out references to Main data members or the
Main instance itself.
Ref #4217
Normally, the board header can be found for each supported board under
'src/core/board/<BOARD>/board.h'. This was not the case for the board 'pc'
that was located under 'src/core/spec/x86_64/board.h'. The commit fixes this.
Ref #4217
The class name Core_thread in Kernel for the object of the first thread of
core is too generic as there can be an arbitrary number of threads in core
besides this one. Furthermore, creating a core thread has its own syscall
'new_core_thread' that isn't related in any way to Core_thread. Therefore
this commit introduces the more specific name Core_main_thread as replacement
for Core_thread.
Ref #4217
The function was only still used for reading the execution time of idle threads
of CPUs. Certainly, it is technically fine and more performant to read these
values directly from the kernel objects without doing a syscall. However,
calling cpu_pool() for it provides read and write access to a lot more than
only the execution time values. The interface via which Core directly reads
state of the kernel should be as narrow and specific as possible.
Perspectively, we want to get rid of the cpu_pool() accessor anyway. Therefore
this commit introduces Kernel::read_idle_thread_execution_time(cpu_idx) as
replacement. The function is implemented in kernel code and called by Core in
platform.cc.
Ref #4217
Apparently, there is no need for exposing the data members of Trace_source, so,
we sould better make them private before someone gets the impression that they
are meant to be accessed directly.
Ref #4217
Core used to read the kernel-reserved IRQs from the timer objects in the
kernel's CPU objects and the PIC class (inter-processor IRQ). Besides not
being "good style" to access a kernel object in Core, this becomes a problem
when trying to prevent CPU pool from being accessed via global functions.
As a solution, this commit extends the boot info to also carry an array of all
kernel-reserved IRQs.
Ref #4217
For the constructor of Kernel_object<T> there are two variants. One for the
case that it is called from Core where the kernel object (type T) must be
created via a syscall and one when it is called from within the kernel and the
kernel object can be created directly. Selecting one of these variants was done
using a bool argument to the constructor. However, this implies that the
constructor of Kernel_object<T> and that of T have the same signature in the
variadic arguments, even in the syscall case, although technically it would
then not be necessary.
This becomes a problem as soon as kernel objects created by Core shall receive
additional arguments from the kernel, for instance a reference to the global
CPU pool, and therefore stands in the way when wanting to get rid of global
statics in the kernel. Therefore, this commit introduces two constructors that
are selected through enum arguments:
! Kernel_object(Called_from_kernel, ...);
! Kernel_object(Called_from_core, ...);
Ref #4217
Introduce two new cache maintainance functions:
* cache_clean_invalidate_data
* cache_invalidate_data
used to flush or invalidate data-cache lines.
Both functions are typically empty, accept for the ARM architecture.
The commit provides implementations for the base-hw kernel, and Fiasco.OC.
Fixes#4207
Report via platform_info the capabilities of the kernel, e.g. ACPI and MSI.
With the commit the try-catch pattern on IRQ session creation by the platform
driver is avoided.
Issue #4016
This patch unifies the core-internal 'Mapping' type across all base
platforms.
As one minor downside on seL4, the diagnostic error messages when
observing faults other than page faults no longer print the faulting
thread and PD names.
Issue #2243
- Enable the "platform-level interrupt controller" PLIC on base-hw
- The RISC-V specification offers only a register description, but no
layout for the register set. This implies the layout is platform
dependent, and therefore, implemented separately for Qemu
issue #4042
Simplify calculation of Timer::_duration, the old implementation caused
the time running backwards sometimes. This makes
'nic_router_dhcp_*' and 'event_filter' run scripts succeed.
issue #4021
Do not link base and core libraries into on large relocatable .o file,
which is linked later to core - causing long link times. Create an
independent library archive out of the base and core libraries that can
be linked faster.
issue #4027
- remove Spike/BBL support in favour of Qemu (>=4.2.1)
- add 'riscv_qemu' board, remove 'spike' board'
- update to privileged ISA v1.10 (from v1.9.1)
- use direct system calls for privileged core threads (they call into
the kernel and don't use mode changing system calls, i.e. 'ecall',
semantics)
- use 'OpenSBI' semtantics for SBI calls (to machine mode) instead of
BBL
issue #4012
Improve consistency with the other base repositories, in particular
- Indentation of class initializers
- Vertical whitespace around control-flow statements
- Preferably place control-flow statements (return, break, continue) at
beginning of a line
- Placing the opening brace of a namespace at the end of line
- Placing the opening brace of a class at a new line
- Removing superfluous braces around single statements
- Two empty lines between methods/functions in implementation files
* Remove SPEC declarations from mk/spec
* Remove all board-specific REQUIRE declaratiions left
* Replace [have_spec <board>] run-script declarations with have_board where necessary
* Remove addition of BOARD variable to SPECS in toplevel Makefile
* Move board-specific directories in base-hw out of specs
The lambda function passed to Board::Vm_page_table_array does not
actually use "this" for anything. GCC does not warn about this, but
clang does. Remove the extra capture to make clang happy.
Issue #3938
GCC doesn't care, but clang complains if [[fallthrough]] is not followed
by a semicolon. Existing code is also not consitent in this regard. Lets
just fix it to make clang happy.
Issue #3938
* Introduce hypervisor-stack per CPU
* Introduce host world context per CPU
* Mark EL2 translation table memory as inner shareable
* The VMID is not bound to a single VCPU, but to the Vm_session as a whole
* Set affinity of the VCPU accordingly
* Add VMPIDR to VM state
Ref #3926
Instead of calling core to run/pause a VCPU, go directly to the kernel.
Apart from the performance win, it would otherwise involve a more complex
protocol, when a VCPU on another core has to be removed from the scheduler.
Core's entrypoint handling those request runs on the boot-cpu only.
Ref #3926
To enable the interaction of a VMM with the kernel directly,
a hidden RPC gets introduced. It allows a kernel-specific
base-library implementation of the Vm_session::Client to request
a kernel-specific capability to address a VCPU, e.g., to
run/stop it.
Ref #3926
Adjust the base-* platforms to acknowledge new thread location solely if
migration is supported and succeeded. Otherwise the wrong thread
locations are observed via the trace session and utilization time calculation
get wrong.
Issue #3842
By now, the enumeration of peripheral interrupts on Raspberry Pi 1 was
different in between base-hw kernel and Fiasco.OC. Therefore, hacks were
needed in every driver to request the correct interrupt number dependent
on the kernel. Before reproducing the same in the platform driver for rpi,
we can more easily use the same enumeration with base-hw.
Ref #3864
To access the ARM Trusted Firmware from the platform driver
fill the new `managing_system` call of the PD session with life resp.
do a SMC call on behalf of the client.
Fix#3816
Older ARM processors like ARMv6, or Cortex A8 need to write back changes
of the page-tables to physical ram because the MMU does not use the cache.
This naturally needs to be done not only when adding a mapping,
but on removal too.
Fix#3715
This patch adds support for booting base-hw kernel on qemu-arm virt
machines. The arm_virt machine has 2GB of RAM, 2 Cortex A15 cores and
uses GICv2 interrupt controller. The arm_64_virt machine also has 2GB of
RAM, but has 4 Cortex A53 cores and uses GICv3. Both machines use PSCI
to boot additional CPU cores.
Fixes#3673
This commit fixes the following issues regarding cache maintainance
under ARM:
* read out I-, and D-cache line size at runtime and use the correct one
* remove 'update_data_region' call from unprivileged syscalls
* rename 'update_instr_region' syscall to 'cache_coherent_region' to
reflect what it doing, namely make I-, and D-cache coherent
* restrict 'cache_coherent_region' syscall to one page at a time
* lookup the region given in a 'cache_coherent_region' syscall in the
page-table of the PD to prevent machine exceptions in the kernel
* only clean D-cache lines, do not invalidate them when pages where
added on Cortex-A8 and ARMv6 (MMU sees phys. memory here)
* remove unused code relicts of cache maintainance
In addition it introduces per architecture memory clearance functions
used by core, when preparing new dataspaces. Thereby, it optimizes:
* on ARMv7 using per-word assignments
* on ARMv8 using cacheline zeroing
* on x86_64 using 'rept stosq' assembler instruction
Fix#3685
