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b21c8729ea
This is a prerequisite to rework the allocation of core data structures for VM sessions in hw. Issue #5221
335 lines
9.6 KiB
C++
335 lines
9.6 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) 2006-2023 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 Affero General Public License version 3.
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*/
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/* Genode includes */
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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/component.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 <core_service.h>
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#include <signal_transmitter.h>
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#include <system_control.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 Core;
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/***************************************
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** Core environment/platform support **
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***************************************/
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Core_env &Core::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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/*
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* Register signal-source entrypoint at core-local signal-transmitter back
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* end
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*/
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static bool signal_transmitter_initialized;
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if (!signal_transmitter_initialized)
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signal_transmitter_initialized =
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(init_core_signal_transmitter(_env.signal_ep()), true);
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return _env;
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}
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Core::Platform &Core::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 &Core::platform() { return platform_specific(); }
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struct Genode::Platform { };
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Genode::Platform &Genode::init_platform()
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{
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core_env();
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static Genode::Platform platform { };
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return platform;
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}
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/**
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* Dummy implementation for core that has no parent to ask for resources
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*/
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void Genode::init_parent_resource_requests(Genode::Env &) {};
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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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Registry<Service> &_services;
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Capability<Pd_session> _core_pd_cap;
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Pd_session &_core_pd;
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Capability<Cpu_session> _core_cpu_cap;
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Cpu_session &_core_cpu;
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Cap_quota const _cap_quota;
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Ram_quota const _ram_quota;
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Id_space<Parent::Server> _server_ids { };
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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, Region_map &local_rm,
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Pd_session &core_pd, Capability<Pd_session> core_pd_cap,
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Cpu_session &core_cpu, Capability<Cpu_session> core_cpu_cap,
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Cap_quota cap_quota, Ram_quota ram_quota,
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Rpc_entrypoint &ep)
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:
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_services(services),
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_core_pd_cap (core_pd_cap), _core_pd (core_pd),
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_core_cpu_cap(core_cpu_cap), _core_cpu(core_cpu),
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_cap_quota(Child::effective_quota(cap_quota)),
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_ram_quota(Child::effective_quota(ram_quota)),
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_child(local_rm, ep, *this)
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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 override { return "init"; }
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Route resolve_session_request(Service::Name const &name,
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Session_label const &label,
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Session::Diag const diag) 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 Service_denied();
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return Route { .service = *service,
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.label = label,
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.diag = diag };
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}
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void init(Pd_session &session, Capability<Pd_session> cap) override
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{
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session.ref_account(_core_pd_cap);
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_core_pd.transfer_quota(cap, _cap_quota);
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_core_pd.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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Pd_session &ref_pd() override { return _core_pd; }
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Pd_session_capability ref_pd_cap() const override { return _core_pd_cap; }
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size_t session_alloc_batch_size() const override { return 128; }
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Id_space<Parent::Server> &server_id_space() override { return _server_ids; }
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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 non-core components, core disables the signal thread by
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* overriding 'Genode::init_signal_thread' with a dummy. Within core, the
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* signal thread is not needed as core is never supposed to receive any
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* signals.
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*/
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void Genode::init_signal_thread(Env &) { }
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/*******************
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** Trace support **
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*******************/
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Core::Trace::Source_registry &Core::Trace::sources()
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{
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static 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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void Genode::bootstrap_component(Genode::Platform &)
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{
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init_exception_handling(*core_env().pd_session(), core_env().local_rm());
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/* disable tracing within core because it is not fully implemented */
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inhibit_tracing = true;
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log("Genode ", Genode::version_string);
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static Core::Trace::Policy_registry trace_policies;
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static Rpc_entrypoint &ep = core_env().entrypoint();
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static Ram_allocator &core_ram_alloc = core_env().ram_allocator();
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static Region_map &local_rm = core_env().local_rm();
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Pd_session &core_pd = *core_env().pd_session();
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Capability<Pd_session> core_pd_cap = core_env().pd_session_cap();
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static Registry<Service> 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(core_ram_alloc, local_rm);
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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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using Trace_root = Core::Trace::Root;
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using Trace_session_component = Core::Trace::Session_component;
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static Core::System_control &system_control = init_system_control(sliced_heap, ep);
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static Rom_root rom_root (ep, ep, platform().rom_fs(), sliced_heap);
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static Rm_root rm_root (ep, sliced_heap, core_ram_alloc, local_rm, pager_ep);
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static Cpu_root cpu_root (core_ram_alloc, local_rm, ep, ep, pager_ep,
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sliced_heap, Core::Trace::sources());
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static Pd_root pd_root (ep, core_env().signal_ep(), pager_ep,
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platform().ram_alloc(),
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local_rm, sliced_heap,
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platform_specific().core_mem_alloc(),
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system_control);
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static Log_root log_root (ep, sliced_heap);
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static Io_mem_root io_mem_root (ep, ep, 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 (core_ram_alloc, local_rm, ep, sliced_heap,
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Core::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<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(ep, sliced_heap, services, Core::Trace::sources(), core_ram_alloc);
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size_t const avail_ram_quota = core_pd.avail_ram().value;
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size_t const avail_cap_quota = core_pd.avail_caps().value;
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size_t const preserved_ram_quota = 224*1024;
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size_t const preserved_cap_quota = 1000;
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if (avail_ram_quota < preserved_ram_quota) {
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error("core preservation exceeds platform RAM limit");
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return;
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}
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if (avail_cap_quota < preserved_cap_quota) {
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error("core preservation exceeds platform cap quota limit");
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return;
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}
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Ram_quota const init_ram_quota { avail_ram_quota - preserved_ram_quota };
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Cap_quota const init_cap_quota { avail_cap_quota - preserved_cap_quota };
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/* CPU session representing core */
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static Cpu_session_component
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core_cpu(ep,
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Session::Resources{{Cpu_session::RAM_QUOTA},
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{Cpu_session::CAP_QUOTA}},
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"core", Session::Diag{false},
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core_ram_alloc, local_rm, ep, pager_ep, Core::Trace::sources(), "",
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Affinity::unrestricted(), Cpu_session::QUOTA_LIMIT);
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Cpu_session_capability core_cpu_cap = core_cpu.cap();
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log("", init_ram_quota.value / (1024*1024), " MiB RAM and ", init_cap_quota, " caps "
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"assigned to init");
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static Reconstructible<Core_child>
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init(services, local_rm, core_pd, core_pd_cap, core_cpu, core_cpu_cap,
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init_cap_quota, init_ram_quota, ep);
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platform().wait_for_exit();
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init.destruct();
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}
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