GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 23:32:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

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
commit 0a499fc5c3
8 changed files with 89 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

6
arch/powerpc/kernel/security.c
View file

@ -57,7 +57,7 @@ void setup_barrier_nospec(void)
enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) &&
security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR);
if (!no_nospec)
if (!no_nospec && !cpu_mitigations_off())
enable_barrier_nospec(enable);
}
@ -116,7 +116,7 @@ static int __init handle_nospectre_v2(char *p)
early_param("nospectre_v2", handle_nospectre_v2);
void setup_spectre_v2(void)
{
if (no_spectrev2)
if (no_spectrev2 || cpu_mitigations_off())
do_btb_flush_fixups();
else
btb_flush_enabled = true;
@ -300,7 +300,7 @@ void setup_stf_barrier(void)
stf_enabled_flush_types = type;
if (!no_stf_barrier)
if (!no_stf_barrier && !cpu_mitigations_off())
stf_barrier_enable(enable);
}