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Joerg Roedel b976690f5d x86/mm/pti: Introduce pti_finalize()

Introduce a new function to finalize the kernel mappings for the userspace
page-table after all ro/nx protections have been applied to the kernel
mappings.

Also move the call to pti_clone_kernel_text() to that function so that it
will run on 32 bit kernels too.

Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Pavel Machek <[email protected]>
Cc: "H . Peter Anvin" <[email protected]>
Cc: [email protected]
Cc: Linus Torvalds <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: David Laight <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: Eduardo Valentin <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Andrea Arcangeli <[email protected]>
Cc: Waiman Long <[email protected]>
Cc: "David H . Gutteridge" <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]

2018-07-20 01:11:45 +02:00

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 // SPDX-License-Identifier: GPL-2.0
 #ifndef _INCLUDE_PTI_H
 #define _INCLUDE_PTI_H
 #ifdef CONFIG_PAGE_TABLE_ISOLATION
 #include <asm/pti.h>
 #else
 static inline void pti_init(void) { }
 static inline void pti_finalize(void) { }
 #endif
 #endif