diff options
| author | Ingo Molnar | 2015-05-04 09:04:56 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2015-05-19 15:48:10 +0200 |
| commit | 489e9c018854158722eb7123f9efefe67af5c4bd (patch) | |
| tree | 1efa593c12b667dd654915359a45572dd35c0ef9 /arch/x86/include/asm | |
| parent | x86/fpu/xstate: Don't assume the first zero xfeatures zero bit means the end (diff) | |
| download | kernel-qcow2-linux-489e9c018854158722eb7123f9efefe67af5c4bd.tar.gz kernel-qcow2-linux-489e9c018854158722eb7123f9efefe67af5c4bd.tar.xz kernel-qcow2-linux-489e9c018854158722eb7123f9efefe67af5c4bd.zip | |
x86/fpu: Clean up xstate feature reservation
Put MPX support into its separate high level structure, and
also replace the fixed YMM, LWP and MPX structures in
xregs_state with just reservations - their exact offsets
in the structure will depend on the CPU and no code actually
relies on those fields.
No change in functionality.
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/fpu/types.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h index 4c4eceb08a42..02241c2a10e9 100644 --- a/arch/x86/include/asm/fpu/types.h +++ b/arch/x86/include/asm/fpu/types.h @@ -145,12 +145,21 @@ struct bndcsr { u64 bndstatus; } __packed; +struct mpx_struct { + struct bndreg bndreg[4]; + struct bndcsr bndcsr; +}; + struct xstate_header { u64 xfeatures; u64 xcomp_bv; u64 reserved[6]; } __attribute__((packed)); +/* New processor state extensions should be added here: */ +#define XSTATE_RESERVE (sizeof(struct ymmh_struct) + \ + sizeof(struct lwp_struct) + \ + sizeof(struct mpx_struct) ) /* * This is our most modern FPU state format, as saved by the XSAVE * and restored by the XRSTOR instructions. @@ -162,11 +171,7 @@ struct xstate_header { struct xregs_state { struct fxregs_state i387; struct xstate_header header; - struct ymmh_struct ymmh; - struct lwp_struct lwp; - struct bndreg bndreg[4]; - struct bndcsr bndcsr; - /* New processor state extensions will go here. */ + u8 __reserved[XSTATE_RESERVE]; } __attribute__ ((packed, aligned (64))); /* |