x86/boot/compressed/64: Make sure we have a 32-bit code segment
When kernel starts in 64-bit mode we inherit the GDT from the bootloader. It may cause a problem if the GDT doesn't have a 32-bit code segment where we expect it to be. Load our own GDT with known segments. Signed-off-by:Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20180312100246.89175-2-kirill.shutemov@linux.intel.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
parent
a5b162b2
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