xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'core-speculation-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
Pull speculation mitigation update from Ingo Molnar:
 "This adds the "mitigations=" bootline option, which offers a
  cross-arch set of options that will work on x86, PowerPC and s390 that
  will map to the arch specific option internally"

* 'core-speculation-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  s390/speculation: Support 'mitigations=' cmdline option
  powerpc/speculation: Support 'mitigations=' cmdline option
  x86/speculation: Support 'mitigations=' cmdline option
  cpu/speculation: Add 'mitigations=' cmdline option
This commit is contained in:
Linus Torvalds
2019-05-06 13:01:16 -07:00
parent e50c5d2e72 0336e04a65
commit 0a499fc5c3
8 changed files with 89 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
include/linux/cpu.h
View File

@@ -187,4 +187,28 @@ static inline void cpu_smt_disable(bool force) { }
static inline void cpu_smt_check_topology(void) { }
#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;
}
#endif /* _LINUX_CPU_H_ */