Commit Graph

107 Commits

Author SHA1 Message Date
Martin Stein
05f5999e71 cpu_session: Access thread state by value 2012-11-23 12:20:22 +01:00
Norman Feske
959df5d46b Generalize handling of PD-session arguments
On Linux, we want to attach additional attributes to processes, i.e.,
the chroot location, the designated UID, and GID. Instead of polluting
the generic code with such Linux-specific platform details, I introduced
the new 'Native_pd_args' type, which can be customized for each
platform. The platform-dependent policy of init is factored out in the
new 'pd_args' library.

The new 'base-linux/run/lx_pd_args.run' script can be used to validate
the propagation of those attributes into core.

Note that this patch does not add the interpretation of the new UID and
PID attributes by core. This will be subject of a follow-up patch.

Related to #510.
2012-11-21 20:04:07 +01:00
Norman Feske
bcabbe2c92 Add 'Thread_base::join()'
Using the new 'join()' function, the caller can explicitly block for the
completion of the thread's 'entry()' function. The test case for this
feature can be found at 'os/src/test/thread_join'. For hybrid
Linux/Genode programs, the 'Thread_base::join()' does not map directly
to 'pthread_join'. The latter function gets already called by the
destructor of 'Thread_base'. According to the documentation, subsequent
calls of 'pthread_join' for one thread may result in undefined behaviour.
So we use a 'Genode::Lock' on this platform, which is in line with the
other platforms.

Related to #194, #501
2012-11-19 12:43:34 +01:00
Christian Helmuth
d23ee02e9a Destruct IPC-server object on entrypoint destruction
The IPC-server object exists solely on the stack of the entrypoint
thread and, therefore, would never be destructed as the thread is just
killed. Now, the object is explicitly destructed in the entrypoint
destructor. An alternative solution could instruct the entrypoint thread
the terminate, which would automatically cleanup its stack.

The object pool is assumed to be empty on destruction of the entrypoint.
If not, we warn and at least dissolve all RPC objects.
2012-11-16 13:55:00 +01:00
Martin Stein
91c27f3f72 base: Tell a mapping wether it maps IO memory. 2012-11-14 16:36:51 +01:00
Alexander Boettcher
7a619b9ede base-nova: solely revoke unused capabilities
Extend tracking of delegated and of translated items. The additional
information is used to solely free up unused/unwanted mapped capabilities and
to avoid unnecessary revokes on capability indexes where nothing have been
received.

Fixes #430
2012-11-07 13:32:40 +01:00
Alexander Boettcher
c1d59e81c2 NOVA: use latest kernel from github
Related to issue #431. Requires toolchain rebuild to bump version to 2.22 !!!

Fixes #429
2012-11-05 17:28:51 +01:00
Christian Helmuth
2f357a7224 Firewall-friendly download methods for contrib src
After this commit "make prepare" uses HTTP, HTTPS, or FTP where possible
fvor downloading third-party source codes. This prevents problems with
strict firewall rules where only selected ports are usable.

Unfortunately, git.l4android.org does not support Git via HTTP and,
therefore, the sources need a working Git port (9418).

Fixes #443.
2012-10-30 12:12:42 +01:00
Stefan Kalkowski
dc3d784e6d Introduce platform-specific services for core
By now all services in core where created, and registered in the generic
main routine. Although there exists already a x86-specific service (I/O ports)
there was no possibility to announce core-services for certain platforms only.
This commit introduces a hook function in the 'Platform' class, that enables
registration of platform-specific services. Moreover, the io-port service
is offered on x86 platforms only now.
2012-10-29 10:08:29 +01:00
Christian Prochaska
1c064d9e70 core: implement missing context area functions
This patch implements the following functions:

base:
- Context_area_rm_session::detach()
- Context_area_ram_session::free()

base-nova:
- unmap_local()

base-fiasco, base-pistachio:
- unmap_local() stub

This patch partially resolves issue #394.
2012-10-24 11:34:39 +02:00
Christian Prochaska
330980378c base-nova: 'Rm_client::unmap()' fix
Areas of an attached dataspace which have never been accessed cannot get
unmapped. With this patch this case is not treated as error anymore.

Fixes #398.
2012-10-24 11:34:39 +02:00
Alexander Boettcher
83039267fa Cleanup: remove 'first' and 'next' of cpu_session
Fixes #10
2012-10-24 11:34:38 +02:00
Norman Feske
8b0ad007ca Fix warning 2012-10-12 13:10:48 +02:00
Sebastian Sumpf
4a3d852b65 Core: Shared IRQ support for Nova/FOC/OKL4
Implement shared IRQs using 'Irq_proxy' class.

Nova: Added global worker 'Irq_thread' support in core and adapted Irq_session.

FOC: Adapted IRQ session code, x86 has shared IRQ support, ARM uses the old
model. Read and set 'mode' argument (from MADT) in 'Irq_session'.

OKL4: Use generic 'Irq_proxy'

Fixes issue #390
2012-10-11 17:10:16 +02:00
Norman Feske
4a1b545770 Move 'Child' API implementation to library 2012-10-09 13:45:33 +02:00
Alexander Boettcher
ec66788f11 NOVA: cleanup - remove _first_sel special handling
Replace dislocation of extern variables with simplistic convention
2012-10-08 15:08:12 +02:00
Alexander Boettcher
f1202139f9 NOVA: fix compiler warning 2012-10-08 15:08:06 +02:00
Alexander Boettcher
6862ab481a NOVA: drop special utcb handling of main thread
Unify handling of UTCBs. The utcb of the main thread is with commit
ea38aad30e at a fixed location - per convention.
So we can remove all the ugly code to transfer the utcb address during process
creation.

To do so also the UTCB of the main thread of Core must be inside Genode's
thread context area to handle it the same way. Unfortunately the UTCB of the
main thread of Core can't be chosen, it is defined by the kernel.

Possible solutions:
- make virtual address of first thread UTCB configurable in hypervisor
- map the utcb of the first thread inside Core to the desired location

This commit implements the second option.

Kernel patch: make utcb map-able
With the patch the Utcb of the main thread of Core is map-able.

Fixes #374

Noux actually uses the sp variable during thread creation and expects to be
set accordingly. This wasn't the case for the main thread, it was ever set
to the address of the main thread UTCB.
2012-10-04 14:35:38 +02:00
Alexander Boettcher
7bd0ed7c44 NOVA: fix overflow in address check 2012-09-24 09:17:59 +02:00
Alexander Boettcher
110a69413d NOVA: move context area
Move the context area close to the end of the virtual user available address,
so that Vancouver can obtain as much as possible of the lower virtual address
range for VMs.
2012-09-24 09:17:58 +02:00
Alexander Boettcher
ed2e610178 NOVA: maximize contiguous virtual space for 32/64
Use virtual regions for memory used during core initialization behind context
area. Enables us to start Vancouver VMs up to 1280 MiB, which requires
large virtual regions of contiguous aligned memory.

Exclude used virtual regions of echo and of pager thread in core.
2012-09-24 09:17:57 +02:00
Alexander Boettcher
ea38aad30e Move context area definition to native_type 2012-09-24 09:17:54 +02:00
Norman Feske
83bdfea9b0 Extend Cpu_session with thread-affinity API
This patch introduces the functions 'affinity' and 'num_cpus' to the CPU
session interface. The interface extension will allow the assignment of
individual threads to CPUs. At this point, it is just a stub with no
actual platform support.
2012-09-05 10:25:04 +02:00
Alexander Boettcher
aae3ce348e NOVA: add single-step support used by gdb
Fixes #336
2012-08-30 10:42:38 +02:00
Alexander Boettcher
3b0e4372fe NOVA: setup all exception handlers of a thread 2012-08-30 10:42:38 +02:00
Alexander Boettcher
fcd62729d4 NOVA: tunnel thread start parameters via state()
The cpu_session interface fails to be virtualized by gdb_monitor because
platform-nova uses an extended nova_cpu_session interface.

The problem was that threads have been created directly at core without
knowledge of gdb_monitor. This lead to the situation that gdb_monitor didn't
know of all threads to be debugged.

Tunnel the additional parameters required on base-nova through the state()
call of the cpu_session interface before the thread actual is started.
2012-08-30 10:42:26 +02:00
Alexander Boettcher
197a48a26c NOVA: implement pause using recall kernel feature 2012-08-30 10:40:00 +02:00
Alexander Boettcher
841a1fd579 NOVA: extend cpu_session with synchronous pause
The kernel provides a "recall" feature issued on threads to force a thread into
an exception. In the exception the current state of the thread can be obtained
and its execution can be halted/paused.

However, the recall exception is only delivered when the next time the thread
would leave the kernel. That means the delivery is asynchronous and Genode has
to wait until the exception triggered.

Waiting for the exception can either be done in the cpu_session service or
outside the service in the protection domain of the caller.

It turned out that waiting inside the cpu_service is prone to deadlock the
system. The cpu_session interface is one of many session interfaces handled by
the same thread inside Core.

Deadlock situation:
* The caller (thread_c) to pause some thread_p manages to establish the call
  to the cpu_session thread_s of Core but get be interrupted before issuing
  the actual pause (recall) command.
* Now the - to be recalled thread_p - is scheduled and tries to invoke another
  service of Core, like making log output.
* Since the Core thread_s is handling the session request of thread_c, the
  kernel uses the timeslice of thread_p to help to finish the request handled
  by thread_s.
* Thread_s issues the actual pause/recall on thread_p and blocks inside Core
  to wait for the recall exception to be issued.
* thread_p will leave not the kernel before finishing it actual IPC with
  thread_s which is blocked waiting for thread_p.

That is the reason why the waiting/blocking for the recall exception taking
place must be done on NOVA in the context of the caller (thread_1).

Introduce a pause_sync call to the cpu_session which returns a semaphore
capability to the caller. The caller blocks on the semaphore and is woken up
when the pager of thread_p receives the recall exception with the state of
thread_p.
2012-08-30 10:40:00 +02:00
Alexander Boettcher
0d03a91b80 NOVA: Use thread_state with all registers 2012-08-30 10:40:00 +02:00
Alexander Boettcher
869abe4ec6 NOVA: make noux_tool_chain happy
Multiple calls to get the dataspace capability on NOVA lead to the situation
that the caller gets each time a new mapping of the same capability at
different indexes.

The client/caller assumes to get every time the very same index, e.g. in
Noux the index is used to look up structures.

Cache the dataspace capability returned via a rm_session for base-nova.
2012-08-17 11:43:04 +02:00
Alexander Boettcher
6899dd3d0a NOVA: fix compiler warning 2012-08-16 10:03:07 +02:00
Alexander Boettcher
dddd602b48 NOVA: fix invalid cap detection 2012-08-10 10:58:14 +02:00
Alexander Boettcher
8526dc4f19 Set ERR_INVALID_OBEJCT if call failed to server
Tell the client that the last operation failed, instead of continuing doing
useless things.
2012-08-10 10:57:54 +02:00
Alexander Boettcher
c06c2887f2 NOVA: don't use externals in sleep forever
Not required.
2012-08-09 14:14:28 +02:00
Alexander Boettcher
a7235d2411 NOVA: Use Genode interfaces to bootstrap Vancouver
Since no kernel objects can be created anymore outside Genode::core,
the Vancouver port must be adjusted to use solely the Genode interfaces.

The Vcpu_dispatcher creates all portals via the cpu_session interface and
uses the feature to setup a specific receive window during a IPC (the
cap_session::alloc IPC) to place to be received/to be mapped capability
(virtualization exception portal) at the designed indexes.

The actual vCPU thread extends from a normal Genode::Thread and extends it
by specific vCPU requirements, which are a larger exception base window and
the need by Vancouver to place the SM and EC cap at indexes next to each other.

Fixes #316
2012-08-09 11:09:42 +02:00
Alexander Boettcher
135a5a6bfb Adjust cap_integrity test to NOVA changes 2012-08-09 11:09:42 +02:00
Alexander Boettcher
2726740d6b NOVA: enable specifying a receive index for IPC
Extend Native_capability type to hold a specific selector index where the to
be received cap during a IPC should be mapped to. This feature is required to
place created caps by the cap_session at specific indexes. This feature is
used by Vancouver to setup the virtualization exception portals (created by
the cap_session) at the intended indexes.
2012-08-09 11:09:42 +02:00
Alexander Boettcher
f68482f87a NOVA: add support to cpu_session to create vCPUs
Extend base-nova specific cpu_session to create also vCPUs.
2012-08-09 11:09:42 +02:00
Alexander Boettcher
4342d0d234 NOVA: let thread die if SM cap is invalid
Patch prevents following bugs:

* In sleep_forever the thread return from semaphore down if cap is revoked
  during destruction of a thread. This causes an endless loop consuming time
  not available for other threads.
* In lock_helper and cap_sel_alloc the thread return from the lock() method
  even if the semaphore down call failed because of an revoked semaphore.

  This lead to the situation that a thread subject to de-construction returns
  from the lock method, but not holding the lock, entering the critical section
  and modifying state inside the critical section. Another thread in parallel
  already in the critical section or entering the critical section also
  modifies the state. This lead to curious bugs ...
* thread_nova, thread_start, irq_session
  Detect early bugs if the SM is gone unexpectedly where it should never
  happen.
2012-08-09 11:09:42 +02:00
Alexander Boettcher
650a1d47f0 NOVA: Throughly cleanup caps in case of errors 2012-08-09 11:09:42 +02:00
Alexander Boettcher
e3a7d2220d NOVA: Use everywhere same value for a invalid cap 2012-08-09 11:09:42 +02:00
Alexander Boettcher
e44648e1ab NOVA: remove pd selector from non Core code
Pd selector isn't used beside core anymore - remove all occurrences inside base
code.
2012-08-09 11:09:41 +02:00
Alexander Boettcher
b6ea5714d7 NOVA: create sm solely in core
Any kernel objects are now created solely by core - namely pt, ec, sm and sc.
2012-08-09 11:09:41 +02:00
Alexander Boettcher
2f84fd0434 NOVA: allocate stack size depending on word size 2012-08-09 11:09:41 +02:00
Alexander Boettcher
f1fa55e804 NOVA: Suppress warnings in rpc_entrypoint 2012-08-09 11:09:41 +02:00
Alexander Boettcher
5620eca7b9 NOVA: force to map cap in pd_session::assing_pd 2012-08-09 11:09:41 +02:00
Alexander Boettcher
9c57fd7229 NOVA: delegate EC cap solely with recall right
Vancouver recalls the vCPU in the vCPU dispatcher code. Enable the right bit
in the mapped native cap so that Vancouver actually is able to perform this
operation.
2012-08-09 11:09:41 +02:00
Alexander Boettcher
4155585267 NOVA: Adjust native_capability type
It now can hold a right bit used during IPC to demote rights of the to be
transfered capability.

The local_name field in the native_capability type is not needed anymore
in NOVA. Simplify the class, remove it from constructors and adapt all
invocations in base-nova.

Unfortunately local_name in struct Raw is still used in generic base code
(process.cc, reload_parent_cap.cc), however has no effect in base-nova.
2012-08-09 11:09:41 +02:00
Alexander Boettcher
7550f243ad NOVA: use cap_session to allocate portals 2012-08-09 11:09:41 +02:00
Alexander Boettcher
0a89d8dbb4 NOVA: extend cpu_session for base-nova 2012-08-09 11:09:40 +02:00