From da9f2b2ac8d91e556125d5b0f94830f88f1bc487 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Sat, 9 Jun 2018 21:23:54 +0000
Subject: [PATCH] add speculation control prctls from linux v4.17

PR_{SET,GET}_SPECULATION_CTRL controls speculation related vulnerability
mitigations, new in commits
b617cfc858161140d69cc0b5cc211996b557a1c7
356e4bfff2c5489e016fdb925adbf12a1e3950ee
---
 include/sys/prctl.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/sys/prctl.h b/include/sys/prctl.h
index aa0c7a88..af76408c 100644
--- a/include/sys/prctl.h
+++ b/include/sys/prctl.h
@@ -136,6 +136,15 @@ struct prctl_mm_map {
 #define PR_SVE_VL_LEN_MASK 0xffff
 #define PR_SVE_VL_INHERIT (1 << 17)
 
+#define PR_GET_SPECULATION_CTRL 52
+#define PR_SET_SPECULATION_CTRL 53
+#define PR_SPEC_STORE_BYPASS 0
+#define PR_SPEC_NOT_AFFECTED 0
+#define PR_SPEC_PRCTL (1UL << 0)
+#define PR_SPEC_ENABLE (1UL << 1)
+#define PR_SPEC_DISABLE (1UL << 2)
+#define PR_SPEC_FORCE_DISABLE (1UL << 3)
+
 int prctl (int, ...);
 
 #ifdef __cplusplus
-- 
2.25.1