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1e4ee5135d
Add initial symmetric multi-processing (SMP) support to UML. With this support enabled, users can tell UML to start multiple virtual processors, each represented as a separate host thread. In UML, kthreads and normal threads (when running in kernel mode) can be scheduled and executed simultaneously on different virtual processors. However, the userspace code of normal threads still runs within their respective single-threaded stubs. That is, SMP support is currently available both within the kernel and across different processes, but still remains limited within threads of the same process in userspace. Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com> Link: https://patch.msgid.link/20251027001815.1666872-6-tiwei.bie@linux.dev Signed-off-by: Johannes Berg <johannes.berg@intel.com>
33 lines
722 B
C
33 lines
722 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#ifndef __ARCH_UM_MMU_H
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#define __ARCH_UM_MMU_H
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#include "linux/types.h"
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <mm_id.h>
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typedef struct mm_context {
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struct mm_id id;
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struct mutex turnstile;
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struct list_head list;
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/* Address range in need of a TLB sync */
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spinlock_t sync_tlb_lock;
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unsigned long sync_tlb_range_from;
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unsigned long sync_tlb_range_to;
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} mm_context_t;
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#define INIT_MM_CONTEXT(mm) \
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.context = { \
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.turnstile = __MUTEX_INITIALIZER(mm.context.turnstile), \
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.sync_tlb_lock = __SPIN_LOCK_INITIALIZER(mm.context.sync_tlb_lock), \
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}
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#endif
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