5a1cef6381
This patch unconditionally applies the labeling of sessions and thereby removes the most common use case of 'Child_policy::filter_session_args'. Furthermore, the patch removes an ambiguity of the session labels of sessions created by the parent of behalf of its child, e.g., the PD session created as part of 'Child' now has the label "<child-name>" whereas an unlabeled PD-session request originating from the child has the label "<child-name> -> ". This way, the routing-policy of 'Child_policy::resolve_session_request' can differentiate both cases. As a consequence, the stricter labeling must now be considered wherever a precise label was specified as a key for a session route or a server- side policy selection. The simplest way to adapt those cases is to use a 'label_prefix' instead of the 'label' attribute. Alternatively, the 'label' attribute may used by appending " -> " (note the whitespace). Fixes #2171
314 lines
8.6 KiB
C++
314 lines
8.6 KiB
C++
/*
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* \brief Core main program
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* \author Norman Feske
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* \date 2006-07-12
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*/
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/*
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* Copyright (C) 2006-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/snprintf.h>
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#include <base/sleep.h>
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#include <base/service.h>
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#include <base/child.h>
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#include <base/log.h>
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#include <rm_session/connection.h>
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#include <pd_session/connection.h>
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#include <rom_session/connection.h>
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#include <cpu_session/connection.h>
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/* base-internal includes */
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#include <base/internal/globals.h>
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/* core includes */
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#include <platform.h>
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#include <core_env.h>
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#include <ram_root.h>
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#include <rom_root.h>
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#include <rm_root.h>
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#include <cpu_root.h>
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#include <pd_root.h>
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#include <log_root.h>
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#include <io_mem_root.h>
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#include <irq_root.h>
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#include <trace/root.h>
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#include <platform_services.h>
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using namespace Genode;
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/***************************************
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** Core environment/platform support **
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***************************************/
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Core_env * Genode::core_env()
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{
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/*
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* Make sure to initialize the platform before constructing the core
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* environment.
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*/
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platform();
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/*
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* By placing the environment as static object here, we ensure that its
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* constructor gets called when this function is used the first time.
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*/
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static Core_env _env;
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return &_env;
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}
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Env_deprecated * Genode::env() {
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return core_env(); }
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Platform *Genode::platform_specific()
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{
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static Platform _platform;
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return &_platform;
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}
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Platform_generic *Genode::platform() { return platform_specific(); }
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/*************************
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** Core parent support **
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*************************/
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Session_capability Core_parent::session(Parent::Client::Id id,
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Parent::Service_name const &name,
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Parent::Session_args const &args,
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Affinity const &affinity)
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{
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Session_capability cap;
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_services.for_each([&] (Service &service) {
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if ((service.name() != name.string()) || cap.valid())
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return;
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Session_state &session = *new (_alloc)
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Session_state(service, _id_space, id, args.string(), affinity);
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service.initiate_request(session);
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cap = session.cap;
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});
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if (!cap.valid())
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error("unexpected core-parent ", name.string(), " session request");
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return cap;
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}
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/****************
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** Core child **
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****************/
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class Core_child : public Child_policy
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{
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private:
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/*
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* Entry point used for serving the parent interface
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*/
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Rpc_entrypoint _entrypoint;
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enum { STACK_SIZE = 2 * 1024 * sizeof(Genode::addr_t)};
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Registry<Service> &_services;
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Capability<Ram_session> _core_ram_cap;
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Ram_session &_core_ram;
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Capability<Cpu_session> _core_cpu_cap;
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Cpu_session &_core_cpu;
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size_t const _ram_quota;
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Child _child;
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public:
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/**
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* Constructor
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*/
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Core_child(Registry<Service> &services, Ram_session &core_ram,
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Capability<Ram_session> core_ram_cap, size_t ram_quota,
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Cpu_session &core_cpu, Capability<Cpu_session> core_cpu_cap)
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:
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_entrypoint(nullptr, STACK_SIZE, "init_child", false),
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_services(services),
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_core_ram_cap(core_ram_cap), _core_ram(core_ram),
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_core_cpu_cap(core_cpu_cap), _core_cpu(core_cpu),
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_ram_quota(Child::effective_ram_quota(ram_quota)),
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_child(*env()->rm_session(), _entrypoint, *this)
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{
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_entrypoint.activate();
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}
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/****************************
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** Child-policy interface **
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****************************/
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Name name() const { return "init"; }
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Service &resolve_session_request(Service::Name const &name,
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Session_state::Args const &args) override
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{
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Service *service = nullptr;
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_services.for_each([&] (Service &s) {
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if (!service && s.name() == name)
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service = &s; });
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if (!service)
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throw Parent::Service_denied();
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return *service;
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}
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void init(Ram_session &session, Capability<Ram_session> cap) override
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{
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session.ref_account(_core_ram_cap);
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_core_ram.transfer_quota(cap, _ram_quota);
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}
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void init(Cpu_session &session, Capability<Cpu_session> cap) override
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{
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session.ref_account(_core_cpu_cap);
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_core_cpu.transfer_quota(cap, Cpu_session::quota_lim_upscale(100, 100));
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}
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Ram_session &ref_ram() { return _core_ram; }
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Ram_session_capability ref_ram_cap() const { return _core_ram_cap; }
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};
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/****************
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** Signal API **
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****************/
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/*
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* In contrast to the 'Platform_env' used by non-core components, core disables
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* the signal thread but overriding 'Genode::init_signal_thread' with a dummy.
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* Within core, the signal thread is not needed as core is never supposed to
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* receive any signals. Otherwise, the signal thread would be the only
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* non-entrypoint thread within core, which would be a problem on NOVA where
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* the creation of regular threads within core is unsupported.
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*/
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namespace Genode { void init_signal_thread(Env &) { } }
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/*******************
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** Trace support **
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*******************/
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Trace::Source_registry &Trace::sources()
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{
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static Trace::Source_registry inst;
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return inst;
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}
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/***************
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** Core main **
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***************/
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namespace Genode {
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extern bool inhibit_tracing;
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extern char const *version_string;
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}
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int main()
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{
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/**
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* Disable tracing within core because it is currently not fully implemented.
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*/
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inhibit_tracing = true;
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log("Genode ", Genode::version_string);
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static Trace::Policy_registry trace_policies;
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/*
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* Initialize root interfaces for our services
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*/
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Rpc_entrypoint *e = core_env()->entrypoint();
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Registry<Service> &services = core_env()->services();
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/*
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* Allocate session meta data on distinct dataspaces to enable independent
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* destruction (to enable quota trading) of session component objects.
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*/
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static Sliced_heap sliced_heap(env()->ram_session(), env()->rm_session());
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/*
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* Factory for creating RPC capabilities within core
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*/
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static Rpc_cap_factory rpc_cap_factory(sliced_heap);
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static Pager_entrypoint pager_ep(rpc_cap_factory);
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static Ram_root ram_root (e, e, platform()->ram_alloc(), &sliced_heap);
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static Rom_root rom_root (e, e, platform()->rom_fs(), &sliced_heap);
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static Rm_root rm_root (e, &sliced_heap, pager_ep);
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static Cpu_root cpu_root (e, e, &pager_ep, &sliced_heap,
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Trace::sources());
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static Pd_root pd_root (e, e, pager_ep, &sliced_heap);
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static Log_root log_root (e, &sliced_heap);
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static Io_mem_root io_mem_root (e, e, platform()->io_mem_alloc(),
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platform()->ram_alloc(), &sliced_heap);
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static Irq_root irq_root (core_env()->pd_session(),
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platform()->irq_alloc(), &sliced_heap);
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static Trace::Root trace_root (e, &sliced_heap, Trace::sources(), trace_policies);
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static Core_service<Rom_session_component> rom_service (services, rom_root);
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static Core_service<Ram_session_component> ram_service (services, ram_root);
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static Core_service<Rm_session_component> rm_service (services, rm_root);
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static Core_service<Cpu_session_component> cpu_service (services, cpu_root);
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static Core_service<Pd_session_component> pd_service (services, pd_root);
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static Core_service<Log_session_component> log_service (services, log_root);
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static Core_service<Io_mem_session_component> io_mem_service (services, io_mem_root);
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static Core_service<Irq_session_component> irq_service (services, irq_root);
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static Core_service<Trace::Session_component> trace_service (services, trace_root);
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/* make platform-specific services known to service pool */
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platform_add_local_services(e, &sliced_heap, &services);
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/* create CPU session representing core */
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static Cpu_session_component
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core_cpu(e, e, &pager_ep, &sliced_heap, Trace::sources(),
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"label=\"core\"", Affinity(), Cpu_session::QUOTA_LIMIT);
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Cpu_session_capability core_cpu_cap = core_env()->entrypoint()->manage(&core_cpu);
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/*
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* Transfer all left memory to init, but leave some memory left for core
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*
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* NOTE: exception objects thrown in core components are currently
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* allocated on core's heap and not accounted by the component's meta data
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* allocator
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*/
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Genode::size_t const ram_quota = platform()->ram_alloc()->avail() - 224*1024;
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log("", ram_quota / (1024*1024), " MiB RAM assigned to init");
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static Volatile_object<Core_child>
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init(services, *env()->ram_session(), env()->ram_session_cap(),
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ram_quota, core_cpu, core_cpu_cap);
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platform()->wait_for_exit();
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init.destruct();
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return 0;
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}
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