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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-07 03:25:13 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-07 03:25:13 +0400
commit4a386c3e177ca2fbc70c9283d0b46537844763a0 (patch)
tree7f3a6a6a984a988e8a6e908d93dcd57d92a82efd /arch/x86/include/asm/i387.h
parente8779776afbd5f2d5315cf48c4257ca7e9b250fb (diff)
parent1cff92d8fdb27684308864d9cdb324bee43b40ab (diff)
downloadlinux-4a386c3e177ca2fbc70c9283d0b46537844763a0.tar.xz
Merge branch 'x86-xsave-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-xsave-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, xsave: Make xstate_enable_boot_cpu() __init, protect on CPU 0 x86, xsave: Add __init attribute to setup_xstate_features() x86, xsave: Make init_xstate_buf static x86, xsave: Check cpuid level for XSTATE_CPUID (0x0d) x86, xsave: Introduce xstate enable functions x86, xsave: Separate fpu and xsave initialization x86, xsave: Move boot cpu initialization to xsave_init() x86, xsave: 32/64 bit boot cpu check unification in initialization x86, xsave: Do not include asm/i387.h in asm/xsave.h x86, xsave: Use xsaveopt in context-switch path when supported x86, xsave: Sync xsave memory layout with its header for user handling x86, xsave: Track the offset, size of state in the xsave layout
Diffstat (limited to 'arch/x86/include/asm/i387.h')
-rw-r--r--arch/x86/include/asm/i387.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h
index f1accc625beb..a73a8d5a5e69 100644
--- a/arch/x86/include/asm/i387.h
+++ b/arch/x86/include/asm/i387.h
@@ -31,7 +31,6 @@ extern void mxcsr_feature_mask_init(void);
extern int init_fpu(struct task_struct *child);
extern asmlinkage void math_state_restore(void);
extern void __math_state_restore(void);
-extern void init_thread_xstate(void);
extern int dump_fpu(struct pt_regs *, struct user_i387_struct *);
extern user_regset_active_fn fpregs_active, xfpregs_active;
@@ -58,11 +57,25 @@ extern int restore_i387_xstate_ia32(void __user *buf);
#define X87_FSW_ES (1 << 7) /* Exception Summary */
+static __always_inline __pure bool use_xsaveopt(void)
+{
+ return static_cpu_has(X86_FEATURE_XSAVEOPT);
+}
+
static __always_inline __pure bool use_xsave(void)
{
return static_cpu_has(X86_FEATURE_XSAVE);
}
+extern void __sanitize_i387_state(struct task_struct *);
+
+static inline void sanitize_i387_state(struct task_struct *tsk)
+{
+ if (!use_xsaveopt())
+ return;
+ __sanitize_i387_state(tsk);
+}
+
#ifdef CONFIG_X86_64
/* Ignore delayed exceptions from user space */