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Merge branch 'x86/mpx' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull x86 cpufeature and mpx updates from Peter Anvin:
 "This includes the basic infrastructure for MPX (Memory Protection
  Extensions) support, but does not include MPX support itself.  It is,
  however, a prerequisite for KVM support for MPX, which I believe will
  be pushed later this merge window by the KVM team.

  This includes moving the functionality in
  futex_atomic_cmpxchg_inatomic() into a new function in uaccess.h so it
  can be reused - this will be used by the final MPX patches.

  The actual MPX functionality (map management and so on) will be pushed
  in a future merge window, when ready"

* 'x86/mpx' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/intel/mpx: Remove unused LWP structure
  x86, mpx: Add MPX related opcodes to the x86 opcode map
  x86: replace futex_atomic_cmpxchg_inatomic() with user_atomic_cmpxchg_inatomic
  x86: add user_atomic_cmpxchg_inatomic at uaccess.h
  x86, xsave: Support eager-only xsave features, add MPX support
  x86, cpufeature: Define the Intel MPX feature flag
This commit is contained in:
Linus Torvalds 2014-01-20 14:46:32 -08:00
commit c9cdd9a6ae
7 changed files with 133 additions and 26 deletions
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17
arch/x86/include/asm/processor.h
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@ -370,6 +370,20 @@ struct ymmh_struct {
u32 ymmh_space[64];
};
/* We don't support LWP yet: */
struct lwp_struct {
u8 reserved[128];
};
struct bndregs_struct {
u64 bndregs[8];
} __packed;
struct bndcsr_struct {
u64 cfg_reg_u;
u64 status_reg;
} __packed;
struct xsave_hdr_struct {
u64 xstate_bv;
u64 reserved1[2];
@ -380,6 +394,9 @@ struct xsave_struct {
struct i387_fxsave_struct i387;
struct xsave_hdr_struct xsave_hdr;
struct ymmh_struct ymmh;
struct lwp_struct lwp;
struct bndregs_struct bndregs;
struct bndcsr_struct bndcsr;
/* new processor state extensions will go here */
} __attribute__ ((packed, aligned (64)));