Instead of blocking in case of exceptions and MMU faults, delegate
the faulter's scheduling context to the assigned pager thread.
Fixgenodelabs/genode#5318
Instatiate a separate pager thread for each cpu core. Every time a pager
object gets managed by the Pager_entrypoint, assign it to the pager thread
on the same cpu core.
Ref genodelabs/genode#5318
* Rename Kernel::Cpu_job to Kernel::Cpu_context (alias Kernel::Cpu::Context)
* State first Cpu affinity of Cpu::Context at construction time
* Move cpu affinity argument from kernel syscall create_thread to start_thread
* Ensure that Cpu pointer is always valid
Fixgenodelabs/genode#5319
On x86, the `Vm_session_component` obscured the differences between SVM
and VMX.
Separate the implementations, factor out common functionality and
address a number of long-standing issues in the process:
- Allocate nested page tables from Core_ram_allocator as a more suitable
abstraction and account for the required memory, subtract the
necessary amount of RAM from the session's `Ram_quota` *before*
constructing the session object, to make sure that the memory
allocated from the `Core_ram_allocator` is available from the VMM's
RAM quota.
- Move the allocation of Vcpu_state and Vcpu_data into the Core::Vcpu
class and use the Core RAM Allocator to allocate memory with a known
physical address.
- Remove the fixed number of virtual CPUs and the associated reservation
of memory by using a Registry for a flexible amount of vCPUs.
Issue #5221
This patch replaces the use of 'core_env()' in 'platform_services.cc' by
the function arguments 'core_ram', 'core_rm', and 'io_port_ranges'.
It also removes the 'Pd_session' argument from 'Io_port_root' and
'Irq_root' to avoid the reliance on the 'Pd_session' interface within
core,
Issue #5408
Replace the use of the global 'core_env()' accessor by the explicit
delegation of interfaces.
- For allocating UTCBs in base-hw, 'Platform_thread' requires
a way to allocate dataspaces ('Ram_allocator') accounted to the
corresponding CPU session, a way to locally map the allocated
dataspaces (core's 'Region_map'), and a way to determine the
physical address (via 'Rpc_entrypoint') used for the initial
UTCB mapping of main threads. Hence those interfaces must be
passed to 'Platform_thread'.
- NOVA's pager code needs to look up 'Cpu_thread_component'
objects using a map item as key. The lookup requires the
'Rpc_entrypoint' that hold the 'Cpu_thread_component' objects.
To make this 'Rpc_entrypoint' available, this patch adds
the 'init_page_fault_handing' function.
- The 'Region_map_mmap' for Linux requires a way to look up
'Linux_dataspace' objects for given dataspace capabilities.
This lookup requires the 'Rpc_entrypoint' holding the dataspaces,
which is now passed to 'platform.cc' via the new Linux-specific
'Core_region_map::init' function.
Issue #5408
`Vm_session_component::create_vcpu()` is present across all supported
kernels, yet until now it was not part of the `Vm_session` interface.
Add the method to the `Vm_session` interface. This unifies calls in the
base library and is the basis to remove the need for a common base class
for separate `Vm_session` implementations for SVM and VMX on x86_64.
Issue #5221
If one of core's threads is causing an MMU fault, dump the
register state and stack backtrace of the faulting stack to
aid debugging.
Fixgenodelabs/genode#5387
This patch removes the only residual C++ exception from the kernel part
of core, eliminating the risk of the kernel thread trying to enter the
kernel itself via the C++ exception-handling path. When throwing an
exception, __cxa_allocate_exception invokes the cxx_heap, which
synchronizes accesses via a Genode::Mutex. In the contention case,
the blocking of the mutex issues a syscall to pause the caller.
The patch fixes the problem by replacing the exception with a return
value.
Fixes#5382
Issue #5245
over rsdp v1. The multiboot2 provided rsdp_v1 version may not contain the
xsdt pointer, but may have the very same acpi revision as the acpi rsdp v2
version of multiboot2.
Fixes#5332
This patch tightens the coupling of the 'Platform_thread' objects
with their corresponding 'Platform_pd' objects by specifying the
'Platform_pd' as constructor argument, keeping the relationship
as a reference (instead of a pointer), and constraining the
lifetime of 'Platform_pd' objects to the lifetime of the PD.
It thereby clears the way to simplify the thread creation since all
PD-related information (like quota budgets) are now known at the
construction time of the 'Platform_thread'.
The return value of 'Platform_thread::start' has been removed because it
is not evaluated by 'Cpu_thread_component'.
Related to #5256
For consistency reasons, remove the cortex_a8, cortex_a9, and cortex_a15
spec directories. Such SPEC variables do not exist since a while.
Also rename remaining translation_table.h header to page_table.h to
stay consistent with the class names inside.
Fixgenodelabs/genode#5253
- Remove exceptions
- Use 'Attr' struct for attach arguments
- Let 'attach' return 'Range' instead of 'Local_addr'
- Renamed 'Region_map::State' to 'Region_map::Fault'
Issue #5245Fixes#5070
The 'Thread_creation_failed' error is now reflected as
'Thread::Start_result' return value. This change also removes the
use of 'Invalid_thread' within core as this exception is an alias
of Cpu_session::Thread_creation_failed.
Issue #5245
This patch removes the exception formerly thrown by 'Cpu_thread::state'
and turns the 'Thread_state' structure into a plain compound type w/o a
constructor.
Issue #5245Fixes#5250
This patch replaces exceptions of the PD session RPC interface with
result types.
The change of the quota-transfer RPC functions required the adaptation
of base/quota_transfer.h and base/child.h.
The 'alloc_signal_source' method has been renamed to 'signal_source'
to avoid an exceedingly long name of the corresponding result type.
The Pd_session::map function takes a 'Virt_range' instead of basic-type
arguments.
The 'Signal_source_capability' alias for 'Capability<Signal_source>' has
been removed.
Issue #5245
This patch updates the signal API to avoid raw pointers, and
replaces the Context_already_in_use and Context_not_associated
exceptions by diagnostic messages.
Fixes#5247
The initial SVM implementation (correctly) just used another standard
x86_64 page table for nested paging. The EPT implementation is for Intel
VMX only. Since we don't know the underlying virtualization technology
at compile time, we need to pick the correct page table implementation
at runtime.
Add add a AMD-compatible HPT page table implementation using the same
base implementation and (more importantly) allocator as the EPT
implementation. Add a Vm_page_table implementation that determines the
used virtualization technology at runtime and internally defers insert
and remove operations to the correct page table implementation.
Issue #5218
On hw, `Page_flags` is used throughout architectures. At the same time,
it is used by the Intel IOMMU page table implementation in the pc
platform driver.
Consolidate the definition in base so it is available for all users.
Issue #5217
Create a generic interface for x86 virtualization.
Split the VMCB data structure in `Vmcb_buf` to represent the physical
VMCB page and `VMCB` as a control interface.
Issue #5113
So far, the VMCB data structure was generated from it's parts (most
prominently VMCB Control Area and VMCB State Save Area) with the VMCB Control
Area accessed via the Mmio framework, while the VMCB State Save Area
struct used directly defined members.
Unify the VMCB structure and uniformly use the Mmio framework to access
the VMCB. Separate the controlling structure from the VMCB page.
Issue #5113
