Messages in this thread Patch in this message | | | Date | Tue, 15 Apr 2008 15:36:56 -0500 (CDT) | From | Alan Mayer <> | Subject | [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable. |
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Subject: [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable.
From: Alan Mayer <ajm@sgi.com>
The SGI UV system needs several more system vectors than a vanilla x86_64 system. Rather than burden the other archs with extra system vectors that they don't use, change FIRST_SYSTEM_VECTOR to a variable, so that it can be dynamic.
Signed-off-by: Alan Mayer <ajm@sgi.com>
--- Index: ingo/arch/x86/kernel/i8259_64.c =================================================================== --- ingo.orig/arch/x86/kernel/i8259_64.c 2008-04-10 13:24:30.000000000 -0500 +++ ingo/arch/x86/kernel/i8259_64.c 2008-04-10 13:57:33.000000000 -0500 @@ -479,33 +479,33 @@ * The reschedule interrupt is a CPU-to-CPU reschedule-helper * IPI, driven by wakeup. */ - set_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt); + alloc_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt); /* IPIs for invalidation */ - set_intr_gate(INVALIDATE_TLB_VECTOR_START+0, invalidate_interrupt0); - set_intr_gate(INVALIDATE_TLB_VECTOR_START+1, invalidate_interrupt1); - set_intr_gate(INVALIDATE_TLB_VECTOR_START+2, invalidate_interrupt2); - set_intr_gate(INVALIDATE_TLB_VECTOR_START+3, invalidate_interrupt3); - set_intr_gate(INVALIDATE_TLB_VECTOR_START+4, invalidate_interrupt4); - set_intr_gate(INVALIDATE_TLB_VECTOR_START+5, invalidate_interrupt5); - set_intr_gate(INVALIDATE_TLB_VECTOR_START+6, invalidate_interrupt6); - set_intr_gate(INVALIDATE_TLB_VECTOR_START+7, invalidate_interrupt7); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+0, invalidate_interrupt0); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+1, invalidate_interrupt1); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+2, invalidate_interrupt2); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+3, invalidate_interrupt3); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+4, invalidate_interrupt4); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+5, invalidate_interrupt5); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+6, invalidate_interrupt6); + alloc_intr_gate(INVALIDATE_TLB_VECTOR_START+7, invalidate_interrupt7); /* IPI for generic function call */ - set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt); + alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt); /* Low priority IPI to cleanup after moving an irq */ set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt); #endif - set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt); - set_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt); + alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt); + alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt); /* self generated IPI for local APIC timer */ - set_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt); + alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt); /* IPI vectors for APIC spurious and error interrupts */ - set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt); - set_intr_gate(ERROR_APIC_VECTOR, error_interrupt); + alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt); + alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt); if (!acpi_ioapic) setup_irq(2, &irq2); Index: ingo/arch/x86/kernel/io_apic_64.c =================================================================== --- ingo.orig/arch/x86/kernel/io_apic_64.c 2008-04-10 13:24:30.000000000 -0500 +++ ingo/arch/x86/kernel/io_apic_64.c 2008-04-10 13:57:33.000000000 -0500 @@ -82,6 +82,10 @@ static int assign_irq_vector(int irq, cpumask_t mask); +int first_system_vector = 0xfe; + +char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE}; + #define __apicdebuginit __init int sis_apic_bug; /* not actually supported, dummy for compile */ @@ -717,7 +721,7 @@ offset = current_offset; next: vector += 8; - if (vector >= FIRST_SYSTEM_VECTOR) { + if (vector >= first_system_vector) { /* If we run out of vectors on large boxen, must share them. */ offset = (offset + 1) % 8; vector = FIRST_DEVICE_VECTOR + offset; Index: ingo/include/asm-x86/hw_irq_64.h =================================================================== --- ingo.orig/include/asm-x86/hw_irq_64.h 2008-04-10 13:24:30.000000000 -0500 +++ ingo/include/asm-x86/hw_irq_64.h 2008-04-10 13:57:33.000000000 -0500 @@ -91,7 +91,6 @@ * levels. (0x80 is the syscall vector) */ #define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2) -#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */ #ifndef __ASSEMBLY__ @@ -115,6 +114,8 @@ void threshold_interrupt(void); void i8254_timer_resume(void); +extern int first_system_vector; + typedef int vector_irq_t[NR_VECTORS]; DECLARE_PER_CPU(vector_irq_t, vector_irq); extern void __setup_vector_irq(int cpu); Index: ingo/include/asm-x86/irq_64.h =================================================================== --- ingo.orig/include/asm-x86/irq_64.h 2008-04-10 13:24:30.000000000 -0500 +++ ingo/include/asm-x86/irq_64.h 2008-04-10 13:57:33.000000000 -0500 @@ -31,7 +31,7 @@ */ #define NR_VECTORS 256 -#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */ +extern int first_system_vector; #if NR_CPUS < MAX_IO_APICS #define NR_IRQS (NR_VECTORS + (32 * NR_CPUS)) Index: ingo/arch/x86/kernel/io_apic_32.c =================================================================== --- ingo.orig/arch/x86/kernel/io_apic_32.c 2008-04-10 13:24:30.000000000 -0500 +++ ingo/arch/x86/kernel/io_apic_32.c 2008-04-10 13:57:33.000000000 -0500 @@ -73,6 +73,10 @@ static int disable_timer_pin_1 __initdata; +int first_system_vector = 0xfe; + +char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE}; + /* * Rough estimation of how many shared IRQs there are, can * be changed anytime. @@ -1166,7 +1170,7 @@ offset = current_offset; next: vector += 8; - if (vector >= FIRST_SYSTEM_VECTOR) { + if (vector >= first_system_vector) { offset = (offset + 1) % 8; vector = FIRST_DEVICE_VECTOR + offset; } @@ -2263,7 +2267,7 @@ int i; /* Reserve all the system vectors. */ - for (i = FIRST_SYSTEM_VECTOR; i < NR_VECTORS; i++) + for (i = first_system_vector; i < NR_VECTORS; i++) set_bit(i, used_vectors); enable_IO_APIC(); Index: ingo/include/asm-x86/mach-default/irq_vectors.h =================================================================== --- ingo.orig/include/asm-x86/mach-default/irq_vectors.h 2008-04-10 13:24:30.000000000 -0500 +++ ingo/include/asm-x86/mach-default/irq_vectors.h 2008-04-10 13:57:33.000000000 -0500 @@ -63,7 +63,6 @@ * levels. (0x80 is the syscall vector) */ #define FIRST_DEVICE_VECTOR 0x31 -#define FIRST_SYSTEM_VECTOR 0xef #define TIMER_IRQ 0 Index: ingo/include/asm-x86/mach-visws/irq_vectors.h =================================================================== --- ingo.orig/include/asm-x86/mach-visws/irq_vectors.h 2008-04-10 13:24:30.000000000 -0500 +++ ingo/include/asm-x86/mach-visws/irq_vectors.h 2008-04-10 13:57:33.000000000 -0500 @@ -42,7 +42,6 @@ * levels. (0x80 is the syscall vector) */ #define FIRST_DEVICE_VECTOR 0x31 -#define FIRST_SYSTEM_VECTOR 0xef #define TIMER_IRQ 0 Index: ingo/arch/x86/kernel/apic_32.c =================================================================== --- ingo.orig/arch/x86/kernel/apic_32.c 2008-04-10 13:24:30.000000000 -0500 +++ ingo/arch/x86/kernel/apic_32.c 2008-04-10 13:57:33.000000000 -0500 @@ -1353,13 +1353,13 @@ * The reschedule interrupt is a CPU-to-CPU reschedule-helper * IPI, driven by wakeup. */ - set_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt); + alloc_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt); /* IPI for invalidation */ - set_intr_gate(INVALIDATE_TLB_VECTOR, invalidate_interrupt); + alloc_intr_gate(INVALIDATE_TLB_VECTOR, invalidate_interrupt); /* IPI for generic function call */ - set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt); + alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt); } #endif @@ -1372,15 +1372,15 @@ smp_intr_init(); #endif /* self generated IPI for local APIC timer */ - set_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt); + alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt); /* IPI vectors for APIC spurious and error interrupts */ - set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt); - set_intr_gate(ERROR_APIC_VECTOR, error_interrupt); + alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt); + alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt); /* thermal monitor LVT interrupt */ #ifdef CONFIG_X86_MCE_P4THERMAL - set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt); + alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt); #endif } Index: ingo/include/asm-x86/desc.h =================================================================== --- ingo.orig/include/asm-x86/desc.h 2008-04-10 13:48:58.000000000 -0500 +++ ingo/include/asm-x86/desc.h 2008-04-10 14:01:48.000000000 -0500 @@ -311,6 +311,28 @@ _set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS); } +#define SYS_VECTOR_FREE 0 +#define SYS_VECTOR_ALLOCED 1 + +extern int first_system_vector; +extern char system_vectors[]; + +static inline void alloc_system_vector(int vector) +{ + if (system_vectors[vector] == SYS_VECTOR_FREE) { + system_vectors[vector] = SYS_VECTOR_ALLOCED; + if (first_system_vector > vector) + first_system_vector = vector; + } else + BUG(); +} + +static inline void alloc_intr_gate(unsigned int n, void *addr) +{ + alloc_system_vector(n); + set_intr_gate(n, addr); +} + /* * This routine sets up an interrupt gate at directory privilege level 3. */
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