Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
46 lines
898 B
C
46 lines
898 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* AMD SVM-SEV command line parsing support
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*
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* Copyright (C) 2023 - 2024 Advanced Micro Devices, Inc.
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*
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* Author: Michael Roth <michael.roth@amd.com>
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*/
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#include <linux/string.h>
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#include <linux/printk.h>
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#include <linux/cache.h>
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#include <linux/cpufeature.h>
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#include <asm/sev-common.h>
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struct sev_config sev_cfg __read_mostly;
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static int __init init_sev_config(char *str)
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{
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char *s;
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while ((s = strsep(&str, ","))) {
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if (!strcmp(s, "debug")) {
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sev_cfg.debug = true;
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continue;
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}
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if (!strcmp(s, "nosnp")) {
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if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) {
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setup_clear_cpu_cap(X86_FEATURE_SEV_SNP);
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cc_platform_clear(CC_ATTR_HOST_SEV_SNP);
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continue;
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} else {
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goto warn;
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}
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}
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warn:
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pr_info("SEV command-line option '%s' was not recognized\n", s);
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}
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return 1;
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}
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__setup("sev=", init_sev_config);
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