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* x86/asm/entry/64: Update path namesJames C Boyd2015-07-021-4/+4
| | | | | | | | | | | | | | The paths mentioned in this file weren't updated through some file rename commits. Fix them to refer to the correct path. Signed-off-by: James C Boyd <jcboyd.dev@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: corbet@lwn.net Cc: trivial@kernel.org Link: http://lkml.kernel.org/r/1435781606-3037-1-git-send-email-jcboyd.dev@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/asm/entry: Rename compat syscall entry pointsIngo Molnar2015-06-081-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Rename the following system call entry points: ia32_cstar_target -> entry_SYSCALL_compat ia32_syscall -> entry_INT80_compat The generic naming scheme for x86 system call entry points is: entry_MNEMONIC_qualifier where 'qualifier' is one of _32, _64 or _compat. Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86, entry: Switch stacks on a paranoid entry from userspaceAndy Lutomirski2015-01-021-6/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | This causes all non-NMI, non-double-fault kernel entries from userspace to run on the normal kernel stack. Double-fault is exempt to minimize confusion if we double-fault directly from userspace due to a bad kernel stack. This is, suprisingly, simpler and shorter than the current code. It removes the IMO rather frightening paranoid_userspace path, and it make sync_regs much simpler. There is no risk of stack overflow due to this change -- the kernel stack that we switch to is empty. This will also enable us to create non-atomic sections within machine checks from userspace, which will simplify memory failure handling. It will also allow the upcoming fsgsbase code to be simplified, because it doesn't need to worry about usergs when scheduling in paranoid_exit, as that code no longer exists. Cc: Oleg Nesterov <oleg@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Tony Luck <tony.luck@intel.com> Acked-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Andy Lutomirski <luto@amacapital.net>
* x86/doc: Update documentation after file shufflingLuis R. Rodriguez2014-12-111-2/+5
| | | | | | | | | | | | While at it, also refer to the 32 bit entry file. Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Borislav Petkov <bp@suse.de> Cc: linux-doc@vger.kernel.org Cc: bpoirier@suse.de Link: http://lkml.kernel.org/r/1418165684-6226-1-git-send-email-mcgrof@do-not-panic.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86-64, doc: Remove int 0xcc from entry_64.S documentationCesar Eduardo Barros2011-08-161-3/+0
| | | | | | | | | | | | | Commit 3ae36655b97a03fa1decf72f04078ef945647c1a (x86-64: Rework vsyscall emulation and add vsyscall= parameter) removed the special use of the 0xcc IDT vector. Remove it from Documentation/x86/entry_64.txt also. Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net> Acked-by: Andy Lutomirski <luto@MIT.EDU> Link: http://lkml.kernel.org/r/1313447210-9149-1-git-send-email-cesarb@cesarb.net Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86-64: Document some of entry_64.SAndy Lutomirski2011-06-051-0/+98
Signed-off-by: Andy Lutomirski <luto@mit.edu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Mikael Pettersson <mikpe@it.uu.se> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Louis Rilling <Louis.Rilling@kerlabs.com> Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/fc134867cc550977cc996866129e11a16ba0f9ea.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar <mingo@elte.hu>
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