linux/arch
Ricardo Neri 670f928ba0 x86/insn-eval: Add utility function to get segment descriptor
The segment descriptor contains information that is relevant to how linear
addresses need to be computed. It contains the default size of addresses
as well as the base address of the segment. Thus, given a segment
selector, we ought to look at segment descriptor to correctly calculate
the linear address.

In protected mode, the segment selector might indicate a segment
descriptor from either the global descriptor table or a local descriptor
table. Both cases are considered in this function.

This function is a prerequisite for functions in subsequent commits that
will obtain the aforementioned attributes of the segment descriptor.

Improvements-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: ricardo.neri@intel.com
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: "Ravi V. Shankar" <ravi.v.shankar@intel.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Chen Yucong <slaoub@gmail.com>
Cc: Adam Buchbinder <adam.buchbinder@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Garnier <thgarnie@google.com>
Link: https://lkml.kernel.org/r/1509135945-13762-15-git-send-email-ricardo.neri-calderon@linux.intel.com
2017-11-01 21:50:12 +01:00
..
alpha pci-v4.14-fixes-6 2017-10-28 10:53:24 -07:00
arc ARC: unbork module link errors with !CONFIG_ARC_HAS_LLSC 2017-10-11 17:07:44 -07:00
arm xen: fixes for 4.14-rc7 2017-10-27 20:41:05 -07:00
arm64 Allwinner fixes for 4.14 2017-10-20 22:24:48 +02:00
blackfin Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
c6x arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
cris MTD changes for 4.14: 2017-09-09 14:48:21 -07:00
frv arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
h8300 arch: define CPU_BIG_ENDIAN for all fixed big endian archs 2017-09-08 18:26:48 -07:00
hexagon Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-04 11:52:29 -07:00
ia64 Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 17:37:26 -07:00
m32r m32r: fix build failure 2017-10-03 17:54:26 -07:00
m68k Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2017-09-10 21:07:39 -07:00
metag arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
microblaze arch: change default endian for microblaze 2017-09-25 15:31:26 +02:00
mips MIPS: math-emu: Remove pr_err() calls from fpu_emu() 2017-10-09 16:33:34 +02:00
mn10300 arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
nios2 nios2 update for v4.14-rc1 2017-09-15 12:47:21 -07:00
openrisc OpenRISC patches for 4.14 2017-09-13 11:52:18 -07:00
parisc parisc: Fix detection of nonsynchronous cr16 cycle counters 2017-10-19 09:21:24 +02:00
powerpc Merge branch 'kvm-ppc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2017-10-19 14:42:09 +02:00
s390 s390/kvm: fix detection of guest machine checks 2017-10-25 07:59:30 +02:00
score
sh sh: sh7269: remove nonexistent GPIO_PH[0-7] to fix pinctrl registration 2017-10-03 17:54:24 -07:00
sparc Revert commit 1a8b6d76dc ("net:add one common config...") 2017-10-09 07:43:06 -07:00
tile Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2017-09-22 13:02:54 -10:00
um um/time: Fixup namespace collision 2017-09-29 10:07:44 +02:00
unicore32 unicore32/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks 2017-08-03 16:29:34 -05:00
x86 x86/insn-eval: Add utility function to get segment descriptor 2017-11-01 21:50:12 +01:00
xtensa arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
.gitignore
Kconfig Revert commit 1a8b6d76dc ("net:add one common config...") 2017-10-09 07:43:06 -07:00