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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-05 12:50:34 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-05 12:50:34 -0800
commitedaed168e135f8ec87b27b567a367cbb041f2243 (patch)
treedc56708c4a2c6ace03c8a7211e941c8911a17092 /tools/include
parent78f860135433a8bba406352fbdcea8e8980583bf (diff)
parent71368af9027f18fe5d1c6f372cfdff7e4bde8b48 (diff)
downloadlinux-edaed168e135f8ec87b27b567a367cbb041f2243.tar.bz2
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/pti update from Thomas Gleixner: "Just a single change from the anti-performance departement: - Add a new PR_SPEC_DISABLE_NOEXEC option which allows to apply the speculation protections on a process without inheriting the state on exec. This remedies a situation where a Java-launcher has speculation protections enabled because that's the default for JVMs which causes the launched regular harmless processes to inherit the protection state which results in unintended performance degradation" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/speculation: Add PR_SPEC_DISABLE_NOEXEC
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/uapi/linux/prctl.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/prctl.h b/tools/include/uapi/linux/prctl.h
index b4875a93363a..094bb03b9cc2 100644
--- a/tools/include/uapi/linux/prctl.h
+++ b/tools/include/uapi/linux/prctl.h
@@ -219,6 +219,7 @@ struct prctl_mm_map {
# define PR_SPEC_ENABLE (1UL << 1)
# define PR_SPEC_DISABLE (1UL << 2)
# define PR_SPEC_FORCE_DISABLE (1UL << 3)
+# define PR_SPEC_DISABLE_NOEXEC (1UL << 4)
/* Reset arm64 pointer authentication keys */
#define PR_PAC_RESET_KEYS 54