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authorTyler Hicks <tyhicks@canonical.com>2019-11-04 12:22:02 +0100
committerThomas Gleixner <tglx@linutronix.de>2019-11-04 12:22:02 +0100
commit731dc9df975a5da21237a18c3384f811a7a41cc6 (patch)
tree9f8e64dbc0fa2b579978052937ac56ac48fd1b20 /include/linux/cpu.h
parentcad14885a8d32c1c0d8eaa7bf5c0152a22b6080e (diff)
cpu/speculation: Uninline and export CPU mitigations helpers
A kernel module may need to check the value of the "mitigations=" kernel command line parameter as part of its setup when the module needs to perform software mitigations for a CPU flaw. Uninline and export the helper functions surrounding the cpu_mitigations enum to allow for their usage from a module. Lastly, privatize the enum and cpu_mitigations variable since the value of cpu_mitigations can be checked with the exported helper functions. Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/cpu.h')
-rw-r--r--include/linux/cpu.h25
1 files changed, 2 insertions, 23 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 2a093434e975..bc6c879bd110 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -218,28 +218,7 @@ static inline int cpuhp_smt_enable(void) { return 0; }
static inline int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) { return 0; }
#endif
-/*
- * These are used for a global "mitigations=" cmdline option for toggling
- * optional CPU mitigations.
- */
-enum cpu_mitigations {
- CPU_MITIGATIONS_OFF,
- CPU_MITIGATIONS_AUTO,
- CPU_MITIGATIONS_AUTO_NOSMT,
-};
-
-extern enum cpu_mitigations cpu_mitigations;
-
-/* mitigations=off */
-static inline bool cpu_mitigations_off(void)
-{
- return cpu_mitigations == CPU_MITIGATIONS_OFF;
-}
-
-/* mitigations=auto,nosmt */
-static inline bool cpu_mitigations_auto_nosmt(void)
-{
- return cpu_mitigations == CPU_MITIGATIONS_AUTO_NOSMT;
-}
+extern bool cpu_mitigations_off(void);
+extern bool cpu_mitigations_auto_nosmt(void);
#endif /* _LINUX_CPU_H_ */