This patch exports the variable clear_loaded_vmcs_enabled to userspace.
Signed-off-by: zhangyanfei <zhangyanfei@xxxxxxxxxxxxxx>
---
Documentation/sysctl/kernel.txt | 8 ++++++++
kernel/sysctl.c | 10 ++++++++++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 6d78841..038148b 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -25,6 +25,7 @@ show up in /proc/sys/kernel:
- bootloader_version [ X86 only ]
- callhome [ S390 only ]
- cap_last_cap
+- clear_loaded_vmcs [ X86 only ]
- core_pattern
- core_pipe_limit
- core_uses_pid
@@ -164,6 +165,13 @@ CAP_LAST_CAP from the kernel.
==============================================================
+clear_loaded_vmcs
+
+Controls if VMCSs should be cleared when host is doing kdump. Exports
+clear_loaded_vmcs_enabled from the kernel.
+
+==============================================================
+
core_pattern:
core_pattern is used to specify a core dumpfile pattern name.
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 4ab1187..3ab7d9c 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -63,6 +63,7 @@
#include <asm/uaccess.h>
#include <asm/processor.h>
+#include <asm/kexec.h>
#ifdef CONFIG_X86
#include <asm/nmi.h>
@@ -994,6 +995,15 @@ static struct ctl_table kern_table[] = {
.proc_handler = proc_dointvec,
},
#endif
+#ifdef CONFIG_KEXEC
+ {
+ .procname = "clear_loaded_vmcs",
+ .data = &clear_loaded_vmcs_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
{ }
};
--
1.7.1
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