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authorJan Kiszka <jan.kiszka@siemens.com>2018-10-15 16:09:29 +0200
committerIngo Molnar <mingo@kernel.org>2018-10-17 12:30:20 +0200
commit04f4f954b69526d7af8ffb8e5780f08b8a6cda2d (patch)
tree2a3f3fc150400381d8e65bc958d42066cf155706 /lib/test_firmware.c
parentx86/boot: Add -Wno-pointer-sign to KBUILD_CFLAGS (diff)
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x86/entry/32: Clear the CS high bits
Even if not on an entry stack, the CS's high bits must be initialized because they are unconditionally evaluated in PARANOID_EXIT_TO_KERNEL_MODE. Failing to do so broke the boot on Galileo Gen2 and IOT2000 boards. [ bp: Make the commit message tone passive and impartial. ] Fixes: b92a165df17e ("x86/entry/32: Handle Entry from Kernel-Mode on Entry-Stack") Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Joerg Roedel <jroedel@suse.de> Acked-by: Joerg Roedel <jroedel@suse.de> CC: "H. Peter Anvin" <hpa@zytor.com> CC: Andrea Arcangeli <aarcange@redhat.com> CC: Andy Lutomirski <luto@kernel.org> CC: Boris Ostrovsky <boris.ostrovsky@oracle.com> CC: Brian Gerst <brgerst@gmail.com> CC: Dave Hansen <dave.hansen@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: Ingo Molnar <mingo@kernel.org> CC: Jiri Kosina <jkosina@suse.cz> 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: Thomas Gleixner <tglx@linutronix.de> 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: linux-mm <linux-mm@kvack.org> CC: x86-ml <x86@kernel.org> Link: http://lkml.kernel.org/r/f271c747-1714-5a5b-a71f-ae189a093b8d@siemens.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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