8e13b376b0
This commit addresses several multiprocessing issues in base-hw: * it reworks cross-cpu maintainance work for TLB invalidation by introducing a generic Inter_processor_work and removes the so called Cpu_domain_update * thereby it solves the cross-cpu thread destruction, when the corresponding thread is active on another cpu (fix #3043) * it adds the missing TLB shootdown for x86 (fix #3042) * on ARM it removes the TLB shootdown via IPIs, because this is not needed on the multiprocessing ARM platforms we support * it enables the per-cpu initialization of the kernel's cpu objects, which means those object initialization is executed by the proper cpu * it rollbacks prior decision to make multiprocessing an aspect, but puts back certain 'smp' mechanisms (like cross-cpu lock) into the generic code base for simplicity reasons
44 lines
867 B
C++
44 lines
867 B
C++
/*
|
|
* \brief Kernel lock for multi-processor systems
|
|
* \author Stefan Kalkowski
|
|
* \date 2018-11-20
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2019 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#include <kernel/cpu.h>
|
|
#include <kernel/lock.h>
|
|
#include <kernel/kernel.h>
|
|
|
|
Kernel::Lock & Kernel::data_lock()
|
|
{
|
|
static Kernel::Lock lock;
|
|
return lock;
|
|
}
|
|
|
|
|
|
void Kernel::Lock::lock()
|
|
{
|
|
/* check for the lock holder being the same cpu */
|
|
if (_current_cpu == Cpu::executing_id()) {
|
|
/* at least print an error message */
|
|
Genode::raw("Cpu ", _current_cpu,
|
|
" error: re-entered lock. Kernel exception?!");
|
|
for (;;) ;
|
|
}
|
|
_lock.lock();
|
|
_current_cpu = Cpu::executing_id();
|
|
}
|
|
|
|
|
|
void Kernel::Lock::unlock()
|
|
{
|
|
_current_cpu = INVALID;
|
|
_lock.unlock();
|
|
}
|