8393ac6895
* Introduces Schedule_context * Use fast-interrupts or normal interrupts * Add mode-transition between secure/non-secure world * Limit system resources for Genode apps due to non-secure world This commit implements the newly introduced Vm session interface to be used on top of TrustZone capable Armv7 CPUs. Therefore a new Schedule_context is introduced in the kernel. Threads and Vms are both Schedule_contexts used by the scheduler. In contrast to a thread a vm uses a different assembler mode switch to the non-secure, virtual world, as well as another exception is used, when the non-secure world is left. For both worlds to co-exist the interrupt-controller needs to be configured, so that the secure (Genode) world uses fast-interrupts only, and the non-secure world only legacy interrupts. The only TrustZone capable platform the base-hw kernel works on top of is the CoreTile Express 9x4 for the Versatile Express motherboard. For a virtual machine working properly on top some platform resources must be reserved. Therefore there exist two flavours of this platform now, one with the 'trustzone' spec-variable enabled, and one without. If 'trustzone' is specified most platform resources (DDR-RAM, and most IRQs) are reserved for the Vm and not available to the secure Genode world.
57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
/*
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* \brief Vm root interface
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* \author Stefan Kalkowski
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* \date 2012-10-08
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*/
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/*
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* Copyright (C) 2012 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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#ifndef _CORE__INCLUDE__VM_ROOT_H_
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#define _CORE__INCLUDE__VM_ROOT_H_
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/* Genode includes */
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#include <root/component.h>
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/* core includes */
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#include <vm_session_component.h>
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namespace Genode {
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class Vm_root : public Root_component<Vm_session_component>
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{
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private:
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Range_allocator *_ram_alloc;
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protected:
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Vm_session_component *_create_session(const char *args)
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{
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size_t ram_quota = Arg_string::find_arg(args, "ram_quota").long_value(0);
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return new (md_alloc())
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Vm_session_component(ep(), _ram_alloc, ram_quota);
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}
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public:
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/**
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* Constructor
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*
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* \param session_ep entrypoint managing vm_session components
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* \param md_alloc meta-data allocator to be used by root component
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*/
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Vm_root(Rpc_entrypoint *session_ep,
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Allocator *md_alloc,
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Range_allocator *ram_alloc)
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: Root_component<Vm_session_component>(session_ep, md_alloc),
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_ram_alloc(ram_alloc){ }
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};
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}
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#endif /* _CORE__INCLUDE__VM_ROOT_H_ */
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