• Andy Lutomirski's avatar
    x86/entry/64: Move the IST stacks into struct cpu_entry_area · 40e7f949
    Andy Lutomirski authored
    The IST stacks are needed when an IST exception occurs and are accessed
    before any kernel code at all runs.  Move them into struct cpu_entry_area.
    
    The IST stacks are unlike the rest of cpu_entry_area: they're used even for
    entries from kernel mode.  This means that they should be set up before we
    load the final IDT.  Move cpu_entry_area setup to trap_init() for the boot
    CPU and set it up for all possible CPUs at once in native_smp_prepare_cpus().
    Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Reviewed-by: default avatarBorislav 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/20171204150606.480598743@linutronix.deSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    40e7f949
fixmap.h 7.41 KB