145 lines
4.0 KiB
C++
145 lines
4.0 KiB
C++
/*
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* \brief VM session component for 'base-hw'
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* \author Stefan Kalkowski
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* \date 2015-02-17
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*/
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/*
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* Copyright (C) 2015-2017 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 <util/construct_at.h>
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/* core includes */
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#include <kernel/core_interface.h>
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#include <spec/arm/virtualization/vm_session_component.h>
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#include <platform.h>
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#include <core_env.h>
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using namespace Genode;
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static Core_mem_allocator & cma() {
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return static_cast<Core_mem_allocator&>(platform().core_mem_alloc()); }
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void Vm_session_component::_exception_handler(Signal_context_capability handler, Vcpu_id)
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{
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if (!_kobj.create(_ds_addr, Capability_space::capid(handler),
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cma().phys_addr(&_table)))
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Genode::warning("Cannot instantiate vm kernel object, invalid signal context?");
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}
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void Vm_session_component::_attach(addr_t phys_addr, addr_t vm_addr, size_t size)
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{
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using namespace Hw;
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Page_flags pflags { RW, NO_EXEC, USER, NO_GLOBAL, RAM, CACHED };
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try {
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_table.insert_translation(vm_addr, phys_addr, size, pflags,
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_table_array.alloc());
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return;
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} catch(Hw::Out_of_tables &) {
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Genode::error("Translation table needs to much RAM");
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} catch(...) {
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Genode::error("Invalid mapping ", Genode::Hex(phys_addr), " -> ",
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Genode::Hex(vm_addr), " (", size, ")");
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}
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}
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void Vm_session_component::_attach_vm_memory(Dataspace_component &dsc,
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addr_t const vm_addr,
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Attach_attr const attribute)
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{
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_attach(dsc.phys_addr() + attribute.offset, vm_addr, attribute.size);
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}
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void Vm_session_component::attach_pic(addr_t vm_addr)
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{
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_attach(Board::Cpu_mmio::IRQ_CONTROLLER_VT_CPU_BASE, vm_addr,
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Board::Cpu_mmio::IRQ_CONTROLLER_VT_CPU_SIZE);
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}
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void Vm_session_component::_detach_vm_memory(addr_t vm_addr, size_t size)
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{
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_table.remove_translation(vm_addr, size, _table_array.alloc());
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}
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void * Vm_session_component::_alloc_table()
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{
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void * table;
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/* get some aligned space for the translation table */
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if (!cma().alloc_aligned(sizeof(Table), (void**)&table,
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Table::ALIGNM_LOG2).ok()) {
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error("failed to allocate kernel object");
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throw Insufficient_ram_quota();
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}
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return table;
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}
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Vm_session_component::Vm_session_component(Rpc_entrypoint &ds_ep,
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Resources resources,
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Label const &,
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Diag,
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Ram_allocator &ram_alloc,
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Region_map ®ion_map,
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unsigned,
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Trace::Source_registry &)
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: Ram_quota_guard(resources.ram_quota),
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Cap_quota_guard(resources.cap_quota),
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_ep(ds_ep),
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_constrained_md_ram_alloc(ram_alloc, _ram_quota_guard(), _cap_quota_guard()),
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_sliced_heap(_constrained_md_ram_alloc, region_map),
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_region_map(region_map),
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_table(*construct_at<Table>(_alloc_table())),
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_table_array(*(new (cma()) Array([this] (void * virt) {
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return (addr_t)cma().phys_addr(virt);})))
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{
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_ds_cap = _constrained_md_ram_alloc.alloc(_ds_size(), Genode::Cache_attribute::UNCACHED);
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try {
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_ds_addr = region_map.attach(_ds_cap);
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} catch (...) {
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_constrained_md_ram_alloc.free(_ds_cap);
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throw;
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}
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/* configure managed VM area */
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_map.add_range(0, 0UL - 0x1000);
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_map.add_range(0UL - 0x1000, 0x1000);
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}
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Vm_session_component::~Vm_session_component()
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{
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/* detach all regions */
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while (true) {
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addr_t out_addr = 0;
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if (!_map.any_block_addr(&out_addr))
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break;
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detach(out_addr);
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}
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/* free region in allocator */
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if (_ds_cap.valid()) {
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_region_map.detach(_ds_addr);
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_constrained_md_ram_alloc.free(_ds_cap);
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}
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/* free guest-to-host page tables */
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destroy(platform().core_mem_alloc(), &_table);
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destroy(platform().core_mem_alloc(), &_table_array);
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}
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