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These SMP-specific switches allow to test and control configurations with various number of CPUs on multiprocessor systems. - NUMPROC: maximum number of logical processors that can be started (including dynamically, not currently supported by ReactOS) at run-time. - BOOTPROC: maximum number of logical processors that can be started at boot-time. - MAXPROC: forces the OS to report the maximum possible number of CPUs as existing on the system. - ONECPU (MP HAL-only boot switch): causes the HAL to only use one (the boot) CPU on a multiprocessor system. Attempting to start other processors will fail. For more information, see: https://www.geoffchappell.com/notes/windows/boot/bcd/osloader/numproc.htm https://www.geoffchappell.com/notes/windows/license/processors.htm https://rmscrypt.wordpress.com/2011/02/ https://codeinsecurity.wordpress.com/2022/04/07/cpu-socket-and-core-count-limits-in-windows-10-and-how-to-remove-them/ Generic references about BOOT.INI switches: https://learn.microsoft.com/en-us/windows-hardware/drivers/devtest/boot-options-in-a-boot-ini-file https://www.itprotoday.com/cloud-computing/what-switches-can-be-used-bootini http://franck.kiechel.free.fr/dbr_eng/BootIni.htm References about BCD options: https://learn.microsoft.com/en-us/windows-hardware/drivers/devtest/bcdedit--set http://www.mistyprojects.co.uk/documents/BCDEdit/files/commands.6.1.7601.htm#TYPES%20OSLOADER
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: MIT (https://spdx.org/licenses/MIT)
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* PURPOSE: Portable processor related routines
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* COPYRIGHT: Copyright 2025 Timo Kreuzer <timo.kreuzer@reactos.org>
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS *******************************************************************/
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KAFFINITY KeActiveProcessors = 0;
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/* Number of processors */
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CCHAR KeNumberProcessors = 0;
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#ifdef CONFIG_SMP
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/* Theoretical maximum number of processors that can be handled.
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* Set once at run-time. Returned by KeQueryMaximumProcessorCount(). */
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ULONG KeMaximumProcessors = MAXIMUM_PROCESSORS;
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/* Maximum number of logical processors that can be started
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* (including dynamically) at run-time. If 0: do not perform checks. */
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ULONG KeNumprocSpecified = 0;
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/* Maximum number of logical processors that can be started
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* at boot-time. If 0: do not perform checks. */
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ULONG KeBootprocSpecified = 0;
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#endif // CONFIG_SMP
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/* FUNCTIONS *****************************************************************/
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KAFFINITY
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NTAPI
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KeQueryActiveProcessors(VOID)
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{
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return KeActiveProcessors;
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}
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