1 files changed, 0 insertions, 44 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0036-kaiser-disabled-on-Xen-PV.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0036-kaiser-disabled-on-Xen-PV.patch
deleted file mode 100644
index 7dcd8729..00000000
--- a/common/recipes-kernel/linux/linux-yocto-4.9.21/0036-kaiser-disabled-on-Xen-PV.patch
+++ /dev/null
@@ -1,44 +0,0 @@
-From e935ed6506f0753343bfc8adfa6f96922737af28 Mon Sep 17 00:00:00 2001
-From: Jiri Kosina <jkosina@suse.cz>
-Date: Tue, 2 Jan 2018 14:19:49 +0100
-Subject: [PATCH 036/103] kaiser: disabled on Xen PV
-
-Kaiser cannot be used on paravirtualized MMUs (namely reading and writing CR3).
-This does not work with KAISER as the CR3 switch from and to user space PGD
-would require to map the whole XEN_PV machinery into both.
-
-More importantly, enabling KAISER on Xen PV doesn't make too much sense, as PV
-guests use distinct %cr3 values for kernel and user already.
-
-Signed-off-by: Jiri Kosina <jkosina@suse.cz>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- arch/x86/mm/kaiser.c | 5 +++++
- 1 file changed, 5 insertions(+)
-
-diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c
-index 8600663..2768854 100644
---- a/arch/x86/mm/kaiser.c
-+++ b/arch/x86/mm/kaiser.c
-@@ -263,6 +263,9 @@ void __init kaiser_check_boottime_disable(void)
- 	char arg[5];
- 	int ret;
- 
-+	if (boot_cpu_has(X86_FEATURE_XENPV))
-+		goto silent_disable;
-+
- 	ret = cmdline_find_option(boot_command_line, "pti", arg, sizeof(arg));
- 	if (ret > 0) {
- 		if (!strncmp(arg, "on", 2))
-@@ -290,6 +293,8 @@ void __init kaiser_check_boottime_disable(void)
- 
- disable:
- 	pr_info("Kernel/User page tables isolation: disabled\n");
-+
-+silent_disable:
- 	kaiser_enabled = 0;
- 	setup_clear_cpu_cap(X86_FEATURE_KAISER);
- }
--- 
-2.7.4
-