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>
31 lines
680 B
C
31 lines
680 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_SHARED_MSR_H
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#define _ASM_X86_SHARED_MSR_H
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struct msr {
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union {
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struct {
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u32 l;
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u32 h;
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};
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u64 q;
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};
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};
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/*
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* The kernel proper already defines rdmsr()/wrmsr(), but they are not for the
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* boot kernel since they rely on tracepoint/exception handling infrastructure
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* that's not available here.
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*/
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static inline void raw_rdmsr(unsigned int reg, struct msr *m)
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{
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asm volatile("rdmsr" : "=a" (m->l), "=d" (m->h) : "c" (reg));
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}
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static inline void raw_wrmsr(unsigned int reg, const struct msr *m)
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{
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asm volatile("wrmsr" : : "c" (reg), "a"(m->l), "d" (m->h) : "memory");
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}
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#endif /* _ASM_X86_SHARED_MSR_H */
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