mirror of
https://abf.rosa.ru/djam/kernel-xen.git
synced 2025-02-23 15:52:46 +00:00
34 lines
1 KiB
Text
34 lines
1 KiB
Text
|
From: Andrea Arcangeli <andrea@cpushare.com>
|
||
|
|
Subject: [PATCH seccomp: make tsc disabling optional
|
||
|
|
Patch-mainline: unknown
|
||
|
|
References: 191123
|
||
|
|
|
||
|
|
Make the TSC disable purely paranoid feature optional, so by default seccomp
|
||
|
|
returns absolutely zerocost.
|
||
|
|
|
||
|
|
Ported from 2.6.19 to 2.6.24-rc7 by Jeff Mahoney.
|
||
|
|
Addition of x86-64 by Jan Beulich.
|
||
|
|
|
||
|
|
Signed-off-by: Andrea Arcangeli <andrea@cpushare.com>
|
||
|
|
Acked-by: Jeff Mahoney <jeffm@suse.com>
|
||
|
|
Automatically created from "patches.fixes/seccomp-disable-tsc-option" by xen-port-patches.py
|
||
|
|
|
||
|
|
--- sle11sp1-2010-02-09.orig/arch/x86/kernel/process-xen.c 2010-02-09 17:12:56.000000000 +0100
|
||
|
|
+++ sle11sp1-2010-02-09/arch/x86/kernel/process-xen.c 2010-02-09 17:13:11.000000000 +0100
|
||
|
|
@@ -117,6 +117,7 @@ static void hard_disable_TSC(void)
|
||
|
|
|
||
|
|
void disable_TSC(void)
|
||
|
|
{
|
||
|
|
+#ifdef CONFIG_SECCOMP_DISABLE_TSC
|
||
|
|
preempt_disable();
|
||
|
|
if (!test_and_set_thread_flag(TIF_NOTSC))
|
||
|
|
/*
|
||
|
|
@@ -125,6 +126,7 @@ void disable_TSC(void)
|
||
|
|
*/
|
||
|
|
hard_disable_TSC();
|
||
|
|
preempt_enable();
|
||
|
|
+#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
static void hard_enable_TSC(void)
|