• Josh Poimboeuf's avatar
    powerpc/speculation: Support 'mitigations=' cmdline option · 782e69ef
    Josh Poimboeuf authored
    Configure powerpc CPU runtime speculation bug mitigations in accordance
    with the 'mitigations=' cmdline option.  This affects Meltdown, Spectre
    v1, Spectre v2, and Speculative Store Bypass.
    
    The default behavior is unchanged.
    Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Tested-by: Jiri Kosina <jkosina@suse.cz> (on x86)
    Reviewed-by: default avatarJiri Kosina <jkosina@suse.cz>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: "H . Peter Anvin" <hpa@zytor.com>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Jiri Kosina <jikos@kernel.org>
    Cc: Waiman Long <longman@redhat.com>
    Cc: Andrea Arcangeli <aarcange@redhat.com>
    Cc: Jon Masters <jcm@redhat.com>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Michael Ellerman <mpe@ellerman.id.au>
    Cc: linuxppc-dev@lists.ozlabs.org
    Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
    Cc: linux-s390@vger.kernel.org
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: linux-arm-kernel@lists.infradead.org
    Cc: linux-arch@vger.kernel.org
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Tyler Hicks <tyhicks@canonical.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Randy Dunlap <rdunlap@infradead.org>
    Cc: Steven Price <steven.price@arm.com>
    Cc: Phil Auld <pauld@redhat.com>
    Link: https://lkml.kernel.org/r/245a606e1a42a558a310220312d9b6adb9159df6.1555085500.git.jpoimboe@redhat.com
    782e69ef
security.c 10.4 KB