Commit Graph

228 Commits

Author SHA1 Message Date
Alexander Boettcher
e171683b8c nova: support setting affinity via cpu session
issue 
2013-08-13 17:08:23 +02:00
Alexander Boettcher
1a82b664ef nova: determine number of CPUs
Issue 
2013-08-13 17:08:23 +02:00
Alexander Boettcher
059bf1c576 nova: fix page fault during core bootup
Fixes 
2013-06-25 11:16:22 +02:00
Alexander Boettcher
e5eeda2ec9 run: support TFTP servers using absolute paths
TFTP server requiring absolute directory names are supported (better) -
specify in RUN_OPT "--tftp-absolute" to create Pulsar config with absolute
path names for PXE boot.

Additional a symbolic link is created from the build directory to
"$PXE_TFTP_DIR_BASE$PXE_TFTP_DIR_OFFSET" automatically. This eases the use
together with autopilot for x86.
2013-06-14 14:27:14 +02:00
Christian Helmuth
b355897f53 update x86emu to 1.20
+ document x86emu move from os -> libports

Fixes 
2013-06-12 11:35:12 +02:00
Alexander Boettcher
ed825c1d46 nova: fix bootstrap bug
commandline_to_basename may adjust the pointer of the string, recalculate the
length accordingly.
2013-05-10 11:16:12 +02:00
Alexander Boettcher
2a761c7fea run: extend genode_until_run by a spawn id
genode_until_run can be called now with a spawn id to able to reattach to a
spawned process (amt, serial output). Run scripts can now call genode_until_run
multiple times.
2013-05-08 09:42:44 +02:00
Norman Feske
09e04d6378 Avoid leakage of signal-source reply capabilities
Issue 
2013-05-07 21:56:06 +02:00
Stefan Kalkowski
8e9e866161 Unify framebuffer driver binary names (fix )
Introduce 'framebuffer' SPEC variable to distinguish hardware framebuffer
drivers furthermore from the SDL framebuffer driver used by Genode/Linux.
2013-05-07 13:04:30 +02:00
Norman Feske
6f294eddc2 Fix warning about initializer of 'Local_addr'
Fixes 
2013-05-06 11:11:03 +02:00
Alexander Boettcher
3593c7fb4d run: move general AMT support to tool/run
Issue 
2013-04-12 10:56:27 +02:00
Martin Stein
ea7ed5947a base: hand over Pd_connection label to Platform_pd
fix: 
2013-04-08 11:42:24 +02:00
Alexander Boettcher
8bc719ee1d nova: show badge as name during page fault message 2013-03-18 13:10:21 +01:00
Norman Feske
21de42c45d core: Introduce 'Address_space' interface
The new core-internal 'Address_space' interface enables cores RM service
to flush mappings of a PD in which a given 'Rm_client' thread resides.
Prior this patch, each platform invented their own way to flush mappings
in the respective 'rm_session_support.cc' implementation. However, those
implementations used to deal poorly with some corner cases. In
particular, if a PD session was destroyed prior a RM session, the RM
session would try to use no longer existing PD session. The new
'Address_space' uses the just added weak-pointer mechanism to deal with
this issue.

Furthermore, the generic 'Rm_session_component::detach' function has
been improved to avoid duplicated unmap operations for platforms that
implement the 'Address_space' interface. Therefore, it is related to
issue . Right now, this is OKL4 only, but other platforms will follow.
2013-03-12 21:53:08 +01:00
Alexander Boettcher
8f204ffd26 nova: improve page fault debugging messages
Ease debugging.

Fixes 
2013-03-08 12:15:02 +01:00
Alexander Boettcher
38b2a3dbb4 nova: support to run script automatically with AMT
This enables us to use the run scripts applied to a native machine equipped
with Intel's AMT. If the environment variables are correctly set up, the remote
test machine is reseted via 'amttool', then via 'amtterm' the serial output
is collected and the normal run script matching pattern for success/failure of
the run script are applied.

'amttool' and 'amtterm' are part of the package called 'amtterm' shipped with
the Linux distributions like Ubuntu, Debian and lot more.

Following environment variables are required, to run the run scripts with a
native AMT test machine:

PXE_TFTP_DIR_BASE   - absolute path of TFTP directory
PXE_TFTP_DIR_OFFSET - relative path to PXE_TFTP_DIR_BASE where the config file
                      will be generated - named 'config-00-00-00-00-00-00'

AMT_TEST_MACHINE_IP  - TCP/IP address of target AMT test machine
AMT_TEST_MACHINE_PWD - password of target AMT test machine

Issue 
2013-03-08 12:09:10 +01:00
Alexander Boettcher
48ea3c35b5 nova: zero out space behind rom modules
Fixes 
2013-02-27 16:50:40 +01:00
Alexander Boettcher
b2d92f3d94 nova: optimize unmap path
Directly unmap memory range instead of looking first it up and then unmap it.

Prerequisite for 
2013-02-27 16:50:27 +01:00
Alexander Boettcher
974c5442c6 nova: don't try to prepare UTCB in case of vCPU
vCPU has no UTCB.

Fixes 
2013-02-27 16:47:21 +01:00
Norman Feske
4fbd74f3aa nova: Support upgrading kernel via 'make prepare' 2013-02-25 22:14:22 +01:00
Norman Feske
fb3933faf3 nova: use bender by default
Bender fixes the serial output on modern PC hardware. Prior this patch,
it was used only when combined with pulsar. Now, we also use it when
booting via GRUB.
2013-02-25 22:14:22 +01:00
Alexander Boettcher
0ac6be3c70 nova: fix boot modules and command line bootstrap
Allocate ever an extra page behind the commandline pointer. If it turns out
that this page is unused, because commandline was short enough, unmap the
memory and put the virtual and physical regions back to the allocator.

Fix 
2013-02-25 22:14:21 +01:00
Christian Prochaska
a99193ad90 Rework the internal lock interface
With this patch, the 'futex' syscall gets used for blocking and unblocking
of threads in the Linux-specific lock implementation.

The 'Native_thread_id' type, which was previously used in the
lock-internal 'Applicant' class to identify a thread to be woken up,
was not suitable anymore for implementing this change. With this patch,
the 'Thread_base*' type gets used instead, which also has the positive
effect of making the public 'cancelable_lock.h' header file
platform-independent.

Fixes .
2013-02-25 22:14:21 +01:00
Alexander Boettcher
b4805af5bc nova: update kernel revision to r2
Fix 
2013-02-25 16:45:50 +01:00
Alexander Boettcher
801d09f166 nova: revoke set portal id right
Revoke the right to set the portal id (aka label) when it is not needed
anymore. Otherwise everybody in the system having a mapping of the portal can
reset the label to something we don't expect.

Issue 
2013-02-25 16:45:50 +01:00
Alexander Boettcher
46447d531e nova: add syscall pt_ctrl bindings
Issue 
2013-02-25 16:45:49 +01:00
Martin Stein
0f8803245a base: make signal framework usable for base-hw
ref 
2013-02-22 20:28:28 +01:00
Alexander Boettcher
b35484b8b0 nova: enable iommu in kernel by default 2013-02-22 20:28:27 +01:00
Alexander Boettcher
c36f6a04a7 nova: extend pd_session by assign_pci function 2013-02-21 11:52:02 +01:00
Alexander Boettcher
c114014c1c nova: kernel patch for assign_pci
Apply lookup of pci config memory address to target pd.
2013-02-21 11:52:02 +01:00
Alexander Boettcher
467eec731f nova: set default receive and translate windows 2013-02-21 11:52:02 +01:00
Alexander Boettcher
250f7b1570 nova: update syscall assign_gsi/_pci for 32/64 bit 2013-02-21 11:52:02 +01:00
Alexander Boettcher
ff062f24ff nova: map write_combined ds as dma able 2013-02-21 11:52:02 +01:00
Alexander Boettcher
1c2f76cd2a nova: add support to specify dma mapping flag 2013-02-21 11:52:02 +01:00
Alexander Boettcher
5380c09c6f nova: construct pager name out of client name
Ease debugging to find out which client is dying actually.
2013-02-21 11:52:02 +01:00
Norman Feske
fae63f4fa9 Merge base libraries into a single library
This patch simplifies the way of how Genode's base libraries are
organized. Originally, the base API was implemented in the form of many
small libraries such as 'thread', 'env', 'server', etc. Most of them
used to consist of only a small number of files. Because those libraries
are incorporated in any build, the checking of their inter-dependencies
made the build process more verbose than desired. Also, the number of
libraries and their roles (core only, non-core only, shared by both core
and non-core) were not easy to capture.

Hereby, the base libraries have been reduced to the following few
libraries:

- startup.mk contains the startup code for normal Genode processes.
  On some platform, core is able to use the library as well.
- base-common.mk contains the parts of the base library that are
  identical by core and non-core processes.
- base.mk contains the complete base API implementation for non-core
  processes

Consequently, the 'LIBS' declaration in 'target.mk' files becomes
simpler as well. In the most simple case, only the 'base' library must
be mentioned.

Fixes 
2013-02-19 14:45:55 +01:00
Norman Feske
bcdc706f42 Unify 'ipc.h' and 'ipc_generic.h' across platforms
The distinction between 'ipc.h' and 'ipc_generic.h' is no more. The only
use case for platform-specific extensions of the IPC support was the
marshalling of capabilities. However, this case is accommodated by a
function interface ('_marshal_capability', '_unmarshal_capability'). By
moving the implementation of these functions from the headers into the
respective ipc libraries, we can abandon the platform-specific 'ipc.h'
headers.
2013-02-14 13:23:37 +01:00
Norman Feske
b1f63e3356 Turn 'platform_env.h' into a private header
This patch removes 'platform_env.h' from the public API headers because
this header was not part of the API anyway.
2013-02-14 13:23:36 +01:00
Alexander Boettcher
ee8eea9330 nova: fix lock guard usage in cap selector
Issue 
2013-02-11 12:11:48 +01:00
Alexander Boettcher
64dbe08359 nova: kill thread with no pager where recall fails
Issue 
2013-02-11 12:01:27 +01:00
Alexander Boettcher
edd30b56a2 nova: fix pager cleanup handling
The cleanup call must be performed already during the _dissolve function
shortly after the object at the cap_session is freed up. Otherwise there
is the chance that an in-flight IPC will find the to be dissolved function
again.

Bomb test triggered the case, that a already dissolved rpc_object was found
by a in-flight IPC. If the rpc_object was already freed up by alloc->destroy
the thread using this stale rpc_object pointer cause page-faults in core.

Fixes partly 
2013-02-11 12:01:26 +01:00
Alexander Boettcher
28f7cf5dc2 nova: fix cleanup handling in server object
As first step the rpc object must be freed up so that the kernel object
(portal) vanishes. Then the object must be removed from the internal object
pool list so that the object can't be obtained anymore. And then the cleanup
call can be performed (_leave_server_object) since now all names to the
rpc_object are gone.

Doing it in different order (as before the commit) there is a very very little
chance (but the bomb test triggers it occasionally) that the rpc_object can be
obtained again by an incoming IPC - even it is already scheduled for removal.

Fixes partly 
2013-02-11 12:01:26 +01:00
Alexander Boettcher
08d87adb4b nova: use kernel branch adjusted to Genode
Since we have now more than a handful patches to the vanilla kernel, we
better switch to a separate git repository in order to review and to maintain
the patches more effectively.

Remove the patches, they are already in the kernel branch.

Fixes 
2013-02-11 12:01:26 +01:00
Alexander Boettcher
f762e8e4fd nova: increase number of available cap indexes
Noux test requires some more indexes. We don't free all up because of a missing
reference counting implementation of indexes in base-nova.

Issue 
2013-02-11 12:01:25 +01:00
Alexander Boettcher
9453d319cb base: add remove_client to rm_session
Fixes 
2013-02-11 12:01:25 +01:00
Alexander Boettcher
486b27a1b8 nova: ease debugging if no cap indexes are left
If we ran out of capabilities indexes, the bit allocator throws an exception.
If this happens the code seems to hang and nothing happens.

Instead one could catch the exception and print some diagnostic message.
This would be nice, but don't work. Printing some diagnostic message itself
tries to do potentially IPC and will allocate new capability indexes at
least for the receive window.

So, catch the exception and let the thread die, so at least the instruction
pointer is left as trace to identify the reason of the trouble.

Fixes 
2013-01-24 11:09:15 +01:00
Alexander Boettcher
e817163f1a nova: use lock guard instead of explicit calls
If an exception is thrown the lock is released automatically, so that
other callers may get a capability index if in between some are freed. Fixes
some deadlocks if Genode is short on capability indexes.

Related to 
2013-01-24 11:05:41 +01:00
Alexander Boettcher
6cc0d69aa7 nova: recall thread if exception can't be resolved
Recall faulting thread and block pager thread. The pager get resumed as soon
as the fault gets resolved by the rm_session (or never ever).

Fixes 
2013-01-21 11:40:38 +01:00
Norman Feske
8fe0c6c91c base-nova: Coding style 2013-01-11 23:11:07 +01:00
Norman Feske
bef78dd9f8 Core: Fix registration of CPU exception handler 2013-01-11 22:16:25 +01:00
Norman Feske
0ca774592f Fix default base-nova/etc/specs.conf 2013-01-11 20:54:46 +01:00
Norman Feske
73ab30c22c Update copyright headers to 2013 2013-01-10 21:44:47 +01:00
Alexander Boettcher
e8c063a8b4 base: release signal context from signal list
Remove signal context object from signal source component list (_signal_queue)
before destruction, otherwise we get a dangling pointer.

On native hardware for base-nova, the signal source thread triggered page
faults in the Signal_source_component::wait_for_signal() method when the signal
context got freed up in Signal_session_component::free_context but was still
enqueued in Signal_source_component::_signal_queue.

Fixes 
2013-01-10 21:17:42 +01:00
Alexander Boettcher
c2d3543e62 base: replace obj_by_* by lookup_and_lock
Add functionality to lookup an object and lock it. Additional the case is
handled that a object may be already in-destruction and the lookup will deny
returning the object.

The object_pool generalize the lookup and lock functionality of the rpc_server
and serve as base for following up patches to fix dangling pointer issues.
2013-01-10 11:13:13 +01:00
Norman Feske
9f82764316 core: Introduce default CPU exception handler
The CPU session interfaces comes with the ability to install an
exception handler per thread. This patch enhances the feature with the
provision of a default signal handler that is used if no thread-specific
handler is installed. The default signal handler can be set by
specifying an invalid thread capability and a valid signal context
capability.

Furthermore, this patch relaxes the requirement of the order of the
calls of 'exception_handler' and 'set_pager'. Originally, the exception
handler could be installed not before setting a pager. Now, we remember
the installed exception handler in the 'Cpu_thread' and propagate to to
the platform thread at a later time.
2013-01-04 15:26:16 +01:00
Alexander Boettcher
1211516c08 nova: decode type of page fault in core
Ease reading debugging messages if a core thread fails.
2012-12-21 14:54:20 +01:00
Alexander Boettcher
cef9af1978 nova: set page fault handler for core threads
Ease debugging if a core thread fail.
2012-12-21 14:54:20 +01:00
Alexander Boettcher
2426030c5b nova: extend cap_session to free up portals 2012-12-21 14:54:20 +01:00
Alexander Boettcher
8c4e1b7eb0 base: extend cap_session with memory allocator
Required to allocate memory to remember per session created capabilities.
During session destruction all capabilities have to be freed up.
2012-12-21 14:54:20 +01:00
Christian Prochaska
42cef716e1 CPU session meta data RAM quota upgrade support
Fixes .
2012-11-30 16:27:29 +01:00
Alexander Boettcher
fa2cbdc7cb Fix: don't deference stale pager pointer in core
Reset pager pointer in platform_thread if pager object is removed.

Fixes 
2012-11-29 13:44:07 +01:00
Norman Feske
0dbb5e1696 Propagate 'Range_allocator::alloc_aligned' errors
This patch reflects eventual allocation errors in a more specific way to
the caller of 'alloc_aligned', in particular out-of-metadata and
out-of-memory are considered as different conditions.

Related to issue .
2012-11-28 22:51:09 +01:00
Christian Prochaska
6c25ced5f2 base-nova: fix core virtual memory region leak
Revert the core-local mapping created in 'Ram_session_component::_clear_ds()'
and free the virtual memory region allocated for this mapping when a
RAM dataspace gets freed.

Fixes .
2012-11-27 20:21:36 +01:00
Alexander Boettcher
51f99106bd NOVA: don't exclude 2. page of virt. address space
Fixes 
2012-11-27 15:33:03 +01:00
Alexander Boettcher
727f29f2e9 Remove obsolete cap selector lock
We can use the Genode::Lock abstraction instead of a separate native SM cap.
2012-11-27 10:56:05 +01:00
Norman Feske
f2e47ef9f4 Whitespace 2012-11-26 09:45:13 +01:00
Alexander Boettcher
c63a6d94f6 NOVA: add chain_loader 'bender'
'Bender' can detect serial ports accessible via PCI and writes the I/O ports
to the Bios Data area (BDA).

Usage together with the PXE bootloader ease life running Genode/NOVA on native
hardware, where a standard serial device isn't available anymore anywhere.
2012-11-23 12:20:28 +01:00
Alexander Boettcher
94c6b7bd10 NOVA: map boot modules rx only 2012-11-23 12:20:28 +01:00
Alexander Boettcher
d5ef49acf9 NOVA: fix bootstrap if modules are loaded above 3G
We don't can use map_local_one_to_one for boot modules because it happens
that boot modules can be at addresses above physical 3G boundary for x86_32.

Defer the mapping of modules until the point where the core allocators
are set up properly and then remap the physical pages to virtual addresses
below 3G.
2012-11-23 12:20:27 +01:00
Alexander Boettcher
b8ab3673cd NOVA: support to restrict memory rwx bits in core 2012-11-23 12:20:27 +01:00
Alexander Boettcher
4d12464cee Read BIOS data area (BDA) to get serial I/O ports
If the I/O ports are non default (3f8), we had to specify manually the correct
I/O ports. With this commit the BDA is read and the I/O port of the first
serial interface (COM) is taken. If no serial interface is available no device
configuration will be undertaken.
2012-11-23 12:20:27 +01:00
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 .
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 , 
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 
2012-11-07 13:32:40 +01:00
Alexander Boettcher
c1d59e81c2 NOVA: use latest kernel from github
Related to issue . Requires toolchain rebuild to bump version to 2.22 !!!

Fixes 
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 .
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 .
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 .
2012-10-24 11:34:39 +02:00
Alexander Boettcher
83039267fa Cleanup: remove 'first' and 'next' of cpu_session
Fixes 
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 
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 

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 
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