]> git.ipfire.org Git - thirdparty/kernel/linux.git/commit
x86/entry/32: Enter the kernel via trampoline stack
authorJoerg Roedel <jroedel@suse.de>
Wed, 18 Jul 2018 09:40:44 +0000 (11:40 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 19 Jul 2018 23:11:37 +0000 (01:11 +0200)
commit45d7b255747c21fc4b1f5043bee0754d39c3bdbf
tree3326c9a21730ae5de0a5902802cd43b861d34714
parent0d2eb73b29996684d5bbb72f85c74b47b4c359f7
x86/entry/32: Enter the kernel via trampoline stack

Use the entry-stack as a trampoline to enter the kernel. The entry-stack is
already in the cpu_entry_area and will be mapped to userspace when PTI is
enabled.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Pavel Machek <pavel@ucw.cz>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: linux-mm@kvack.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Waiman Long <llong@redhat.com>
Cc: "David H . Gutteridge" <dhgutteridge@sympatico.ca>
Cc: joro@8bytes.org
Link: https://lkml.kernel.org/r/1531906876-13451-8-git-send-email-joro@8bytes.org
arch/x86/entry/entry_32.S
arch/x86/include/asm/switch_to.h
arch/x86/kernel/asm-offsets.c
arch/x86/kernel/cpu/common.c
arch/x86/kernel/process.c
arch/x86/kernel/process_32.c