Messages in this thread Patch in this message | | | From | Willy Tarreau <> | Subject | [PATCH RFC 1/4] x86/thread_info: add TIF_NOPTI to disable PTI per task | Date | Mon, 8 Jan 2018 17:12:16 +0100 |
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This flag indicates that the task will not use isolated page tables.
Signed-off-by: Willy Tarreau <w@1wt.eu> --- arch/x86/include/asm/thread_info.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index 0022333..2f92cf1 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -126,6 +126,14 @@ struct thread_info { #define _TIF_X32 (1 << TIF_X32) #define _TIF_FSCHECK (1 << TIF_FSCHECK) +/* The following flags only exist on x86-64. We can't use the shift anymore + * due to C using signed ints by default and asm using unsigned longs. + */ +#ifdef CONFIG_X86_64 +# define TIF_NOPTI 32 /* disable PTI for this task */ +# define _TIF_NOPTI 0x0000000100000000 +#endif + /* * work to do in syscall_trace_enter(). Also includes TIF_NOHZ for * enter_from_user_mode() -- 1.7.12.1
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