From bb3f0b59ad005d2d2ecbbe9bd048eab6d1ecbd31 Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Sun, 25 Jan 2009 02:38:09 -0800 Subject: x86: make irqinit_32.c more like irqinit_64.c, v2 Impact: cleanup 1. add smp_intr_init and apic_intr_init for 32bit, the same as 64bit 2. move the apic_intr_init() call before set gate with interrupt[i] 3. for 64bit, if ia32_emulation is not used, will make per_cpu to use 0x80 vector. [ v2: should use !test_bit() instead of test_bit() with 32bit ] Signed-off-by: Yinghai Lu Signed-off-by: Ingo Molnar --- arch/x86/kernel/traps.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) (limited to 'arch/x86/kernel/traps.c') diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index ed5aee5f3fcc..d36a502d87ab 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -979,8 +979,13 @@ void __init trap_init(void) #endif set_intr_gate(19, &simd_coprocessor_error); + /* Reserve all the builtin and the syscall vector: */ + for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++) + set_bit(i, used_vectors); + #ifdef CONFIG_IA32_EMULATION set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall); + set_bit(IA32_SYSCALL_VECTOR, used_vectors); #endif #ifdef CONFIG_X86_32 @@ -997,17 +1002,9 @@ void __init trap_init(void) } set_system_trap_gate(SYSCALL_VECTOR, &system_call); -#endif - - /* Reserve all the builtin and the syscall vector: */ - for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++) - set_bit(i, used_vectors); - -#ifdef CONFIG_X86_64 - set_bit(IA32_SYSCALL_VECTOR, used_vectors); -#else set_bit(SYSCALL_VECTOR, used_vectors); #endif + /* * Should be a barrier for any external CPU state: */ -- cgit v1.2.3 From fcb2ac5bdfa3a7a04fb9749b916f64400f4c35a8 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 8 Apr 2009 13:31:58 +0200 Subject: x86_32: introduce restore_fpu_checking() Impact: cleanup, prepare FPU code unificaton Like on x86_64, return an error from restore_fpu and kill the task if it fails. Also rename restore_fpu to restore_fpu_checking which allows ifdefs to be removed in math_state_restore(). Signed-off-by: Jiri Slaby LKML-Reference: <1239190320-23952-1-git-send-email-jirislaby@gmail.com> Signed-off-by: Ingo Molnar --- arch/x86/include/asm/i387.h | 9 ++++----- arch/x86/kernel/traps.c | 5 +---- 2 files changed, 5 insertions(+), 9 deletions(-) (limited to 'arch/x86/kernel/traps.c') diff --git a/arch/x86/include/asm/i387.h b/arch/x86/include/asm/i387.h index 71c9e5183982..09a2d6dfd85b 100644 --- a/arch/x86/include/asm/i387.h +++ b/arch/x86/include/asm/i387.h @@ -185,12 +185,10 @@ static inline void tolerant_fwait(void) asm volatile("fnclex ; fwait"); } -static inline void restore_fpu(struct task_struct *tsk) +static inline int restore_fpu_checking(struct task_struct *tsk) { - if (task_thread_info(tsk)->status & TS_XSAVE) { - xrstor_checking(&tsk->thread.xstate->xsave); - return; - } + if (task_thread_info(tsk)->status & TS_XSAVE) + return xrstor_checking(&tsk->thread.xstate->xsave); /* * The "nop" is needed to make the instructions the same * length. @@ -200,6 +198,7 @@ static inline void restore_fpu(struct task_struct *tsk) "fxrstor %1", X86_FEATURE_FXSR, "m" (tsk->thread.xstate->fxsave)); + return 0; } /* We need a safe address that is cheap to find and that is already diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index a1d288327ff0..d696145855b5 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -839,9 +839,6 @@ asmlinkage void math_state_restore(void) } clts(); /* Allow maths ops (or we recurse) */ -#ifdef CONFIG_X86_32 - restore_fpu(tsk); -#else /* * Paranoid restore. send a SIGSEGV if we fail to restore the state. */ @@ -850,7 +847,7 @@ asmlinkage void math_state_restore(void) force_sig(SIGSEGV, tsk); return; } -#endif + thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */ tsk->fpu_counter++; } -- cgit v1.2.3