- add header guards
- standardize vertical alignment
- add comments about MPX
No code changed.
Reviewed-by: Borislav Petkov <b...@alien8.de>
Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Fenghua Yu <fenghua...@intel.com>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
arch/x86/include/asm/fpu/types.h | 50
++++++++++++++++++++++++++++++--------------------
1 file changed, 30 insertions(+), 20 deletions(-)
diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h
index e996023380d3..efb520dcf38e 100644
--- a/arch/x86/include/asm/fpu/types.h
+++ b/arch/x86/include/asm/fpu/types.h
@@ -1,3 +1,8 @@
+/*
+ * FPU data structures:
+ */
+#ifndef _ASM_X86_FPU_H
+#define _ASM_X86_FPU_H
#define MXCSR_DEFAULT 0x1f80
@@ -52,6 +57,9 @@ struct i387_fxsave_struct {
} __attribute__((aligned(16)));
+/*
+ * Software based FPU emulation state:
+ */
struct i387_soft_struct {
u32 cwd;
u32 swd;
@@ -74,38 +82,39 @@ struct i387_soft_struct {
struct ymmh_struct {
/* 16 * 16 bytes for each YMMH-reg = 256 bytes */
- u32 ymmh_space[64];
+ u32 ymmh_space[64];
};
/* We don't support LWP yet: */
struct lwp_struct {
- u8 reserved[128];
+ u8 reserved[128];
};
+/* Intel MPX support: */
struct bndreg {
- u64 lower_bound;
- u64 upper_bound;
+ u64 lower_bound;
+ u64 upper_bound;
} __packed;
struct bndcsr {
- u64 bndcfgu;
- u64 bndstatus;
+ u64 bndcfgu;
+ u64 bndstatus;
} __packed;
struct xsave_hdr_struct {
- u64 xstate_bv;
- u64 xcomp_bv;
- u64 reserved[6];
+ u64 xstate_bv;
+ u64 xcomp_bv;
+ u64 reserved[6];
} __attribute__((packed));
struct xsave_struct {
- struct i387_fxsave_struct i387;
- struct xsave_hdr_struct xsave_hdr;
- struct ymmh_struct ymmh;
- struct lwp_struct lwp;
- struct bndreg bndreg[4];
- struct bndcsr bndcsr;
- /* new processor state extensions will go here */
+ struct i387_fxsave_struct i387;
+ struct xsave_hdr_struct xsave_hdr;
+ struct ymmh_struct ymmh;
+ struct lwp_struct lwp;
+ struct bndreg bndreg[4];
+ struct bndcsr bndcsr;
+ /* New processor state extensions will go here. */
} __attribute__ ((packed, aligned (64)));
union thread_xstate {
@@ -116,9 +125,9 @@ union thread_xstate {
};
struct fpu {
- unsigned int last_cpu;
- unsigned int has_fpu;
- union thread_xstate *state;
+ unsigned int last_cpu;
+ unsigned int has_fpu;
+ union thread_xstate *state;
/*
* This counter contains the number of consecutive context switches
* during which the FPU stays used. If this is over a threshold, the
@@ -127,6 +136,7 @@ struct fpu {
* wraps and the context switch behavior turns lazy again; this is to
* deal with bursty apps that only use the FPU for a short time:
*/
- unsigned char counter;
+ unsigned char counter;
};
+#endif /* _ASM_X86_FPU_H */
--
2.1.0
--
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