2291b26874
Fix the function name declaration so it is just one line, and add the missing brackets to the else clause in the if statement. Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* timskmodutils.c
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*
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* Copyright (C) 2010 - 2013 UNISYS CORPORATION
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*/
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#include "uniklog.h"
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#include "timskmod.h"
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#define MYDRVNAME "timskmodutils"
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/* s-Par uses the Intel processor's VT-X features to separate groups of
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* processors into partitions. The firmware sets the hypervisor bit and
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* reports an ID in the HV capabilities leaf so that the partition's OS
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* knows s-Par is present and managing the processors.
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*/
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#define UNISYS_SPAR_LEAF_ID 0x40000000
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/* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */
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#define UNISYS_SPAR_ID_EBX 0x73696e55
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#define UNISYS_SPAR_ID_ECX 0x70537379
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#define UNISYS_SPAR_ID_EDX 0x34367261
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int unisys_spar_platform;
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EXPORT_SYMBOL_GPL(unisys_spar_platform);
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static __init uint32_t visorutil_spar_detect(void)
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{
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unsigned int eax, ebx, ecx, edx;
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if (cpu_has_hypervisor) {
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/* check the ID */
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cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx);
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return (ebx == UNISYS_SPAR_ID_EBX) &&
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(ecx == UNISYS_SPAR_ID_ECX) &&
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(edx == UNISYS_SPAR_ID_EDX);
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} else {
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return 0;
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}
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}
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static __init int visorutil_mod_init(void)
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{
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if (visorutil_spar_detect()) {
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unisys_spar_platform = TRUE;
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return 0;
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} else {
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return -ENODEV;
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}
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}
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static __exit void
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visorutil_mod_exit(void)
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{
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}
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module_init(visorutil_mod_init);
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module_exit(visorutil_mod_exit);
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MODULE_LICENSE("GPL");
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