Jan Kiszka 04f4f954b6 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: b92a165df1 ("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>

2018-10-17 12:30:20 +02:00

..

boot

x86/boot: Add -Wno-pointer-sign to KBUILD_CFLAGS

2018-10-14 11:11:23 +02:00

configs

x86/unwind: Rename unwinder config options to 'CONFIG_UNWINDER_*'

2017-10-14 10:12:12 +02:00

crypto

crypto: x86/aegis,morus - Do not require OSXSAVE for SSE2

2018-09-14 14:08:27 +08:00

entry

x86/entry/32: Clear the CS high bits

2018-10-17 12:30:20 +02:00

events

perf/x86/amd/uncore: Set ThreadMask and SliceMask for L3 Cache perf events

2018-10-02 09:38:04 +02:00

hyperv

x86/hyper-v: rename ipi_arg_{ex,non_ex} structures

2018-09-20 00:51:42 +02:00

ia32

syscalls/x86: auto-create compat_sys_*() prototypes

2018-04-02 20:16:18 +02:00

include

x86/percpu: Fix this_cpu_read()

2018-10-14 11:11:22 +02:00

kernel

x86/time: Correct the attribute on jiffies' definition

2018-10-14 11:11:23 +02:00

kvm

KVM: vmx: hyper-v: don't pass EPT configuration info to vmx_hv_remote_flush_tlb()

2018-10-13 11:38:54 +02:00

lib

x86/nmi: Fix NMI uaccess race against CR3 switching

2018-08-31 17:08:22 +02:00

math-emu

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mm

x86/mm: Avoid VLA in pgd_alloc()

2018-10-09 08:55:07 +02:00

net

bpf, x32: Fix regression caused by commit 24dea04767

2018-07-26 02:51:12 +02:00

oprofile

x86/oprofile: Fix bogus GCC-8 warning in nmi_setup()

2018-02-21 09:54:17 +01:00

pci

PCI: Make early dump functionality generic

2018-06-29 20:06:07 -05:00

platform

x86/efi: Load fixmap GDT in efi_call_phys_epilog() before setting %cr3

2018-09-12 21:53:34 +02:00

power

Merge tag 'pm-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2018-08-14 13:12:24 -07:00

purgatory

kbuild: move bin2c back to scripts/ from scripts/basic/

2018-07-18 01:18:05 +09:00

ras

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

realmode

x86-64/realmode: Add instruction suffix

2018-02-20 09:33:41 +01:00

tools

x86/relocs: Add __end_rodata_aligned to S_REL

2018-08-09 20:42:07 +02:00

um

Merge tag 'kconfig-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2018-08-15 13:05:12 -07:00

video

…

xen

Merge tag 'for-linus-4.19d-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2018-09-23 13:32:19 +02:00

.gitignore

x86/build: Add arch/x86/tools/insn_decoder_test to .gitignore

2018-02-13 14:10:29 +01:00

Kbuild

Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-09-07 09:25:15 -07:00

Kconfig

x86/Kconfig: Fix trivial typo

2018-08-27 10:29:14 +02:00

Kconfig.cpu

Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-03-25 07:36:02 -10:00

Kconfig.debug

Kconfig: consolidate the "Kernel hacking" menu

2018-08-02 08:06:48 +09:00

Makefile

x86: Allow generating user-space headers without a compiler

2018-08-31 17:08:22 +02:00

Makefile_32.cpu

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Makefile.um

kbuild: rename LDFLAGS to KBUILD_LDFLAGS

2018-08-24 08:22:08 +09:00