• A
    x86/entry: Move SYSENTER_stack to the beginning of struct tss_struct · 1a935bc3
    Andy Lutomirski 提交于
    SYSENTER_stack should have reliable overflow detection, which
    means that it needs to be at the bottom of a page, not the top.
    Move it to the beginning of struct tss_struct and page-align it.
    
    Also add an assertion to make sure that the fixed hardware TSS
    doesn't cross a page boundary.
    Signed-off-by: NAndy Lutomirski <luto@kernel.org>
    Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
    Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
    Reviewed-by: NBorislav Petkov <bp@suse.de>
    Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Borislav Petkov <bpetkov@suse.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Dave Hansen <dave.hansen@intel.com>
    Cc: Dave Hansen <dave.hansen@linux.intel.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: H. Peter Anvin <hpa@zytor.com>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Juergen Gross <jgross@suse.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rik van Riel <riel@redhat.com>
    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
    Link: https://lkml.kernel.org/r/20171204150605.881827433@linutronix.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
    1a935bc3
common.c 41.6 KB