Re: [Xen-devel] [PATCH] IRQ: Group IRQ_MOVE_CLEANUP_VECTOR with other hypervisor IPIs

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 07/09/2011 17:03, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

>>>> On 07.09.11 at 17:03, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
> 
> Are you sure this is correct? I'm suspicious that this may intentionally
> have been the lowest priority vector...

I can't see why?

>> Also, rename to MOVE_CLEANUP_VECTOR to be in line with the other IPI
>> names.
> 
> Why would the removal of part of the descriptive name be in line with
> the other names? We're dealing with the cleanup after an IRQ move
> here, so let the name state this. The IRQ_ prefix here has nothing to
> do with this being the vector for a specific IRQ.

Agreed.

 -- Keir

> Jan
> 
>> This requires bumping LAST_HIPRIORITY_VECTOR, but does mean that the
>> range FIRST-LAST_HIPRIORITY_VECTORs are free once again.
>> 
>> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
>> 
>> diff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/apic.c
>> --- a/xen/arch/x86/apic.c Mon Sep 05 15:10:28 2011 +0100
>> +++ b/xen/arch/x86/apic.c Wed Sep 07 16:00:55 2011 +0100
>> @@ -90,7 +90,7 @@ bool_t __read_mostly directed_eoi_enable
>>   * through the ICC by us (IPIs)
>>   */
>>  __asm__(".section .text");
>> -BUILD_SMP_INTERRUPT(irq_move_cleanup_interrupt,IRQ_MOVE_CLEANUP_VECTOR)
>> +BUILD_SMP_INTERRUPT(irq_move_cleanup_interrupt,MOVE_CLEANUP_VECTOR)
>>  BUILD_SMP_INTERRUPT(event_check_interrupt,EVENT_CHECK_VECTOR)
>>  BUILD_SMP_INTERRUPT(invalidate_interrupt,INVALIDATE_TLB_VECTOR)
>>  BUILD_SMP_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR)
>> diff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/hvm/vmx/vmx.c
>> --- a/xen/arch/x86/hvm/vmx/vmx.c Mon Sep 05 15:10:28 2011 +0100
>> +++ b/xen/arch/x86/hvm/vmx/vmx.c Wed Sep 07 16:00:55 2011 +0100
>> @@ -1986,7 +1986,7 @@ static void vmx_do_extint(struct cpu_use
>>  
>>      switch ( vector )
>>      {
>> -    case IRQ_MOVE_CLEANUP_VECTOR:
>> +    case MOVE_CLEANUP_VECTOR:
>>          smp_irq_move_cleanup_interrupt(regs);
>>          break;
>>      case LOCAL_TIMER_VECTOR:
>> diff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/io_apic.c
>> --- a/xen/arch/x86/io_apic.c Mon Sep 05 15:10:28 2011 +0100
>> +++ b/xen/arch/x86/io_apic.c Wed Sep 07 16:00:55 2011 +0100
>> @@ -476,7 +476,7 @@ fastcall void smp_irq_move_cleanup_inter
>>           * to myself.
>>           */
>>          if (irr  & (1 << (vector % 32))) {
>> -            genapic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
>> +            genapic->send_IPI_self(MOVE_CLEANUP_VECTOR);
>>              TRACE_3D(TRC_HW_IRQ_MOVE_CLEANUP_DELAY,
>>                       irq, vector, smp_processor_id());
>>              goto unlock;
>> @@ -513,7 +513,7 @@ static void send_cleanup_vector(struct i
>>  
>>      cpus_and(cleanup_mask, cfg->old_cpu_mask, cpu_online_map);
>>      cfg->move_cleanup_count = cpus_weight(cleanup_mask);
>> -    genapic->send_IPI_mask(&cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
>> +    genapic->send_IPI_mask(&cleanup_mask, MOVE_CLEANUP_VECTOR);
>>  
>>      cfg->move_in_progress = 0;
>>  }
>> diff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/irq.c
>> --- a/xen/arch/x86/irq.c Mon Sep 05 15:10:28 2011 +0100
>> +++ b/xen/arch/x86/irq.c Wed Sep 07 16:00:55 2011 +0100
>> @@ -338,7 +338,7 @@ int __init init_irq_data(void)
>>      set_bit(HYPERCALL_VECTOR, used_vectors);
>>      
>>      /* IRQ_MOVE_CLEANUP_VECTOR used for clean up vectors */
>> -    set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors);
>> +    set_bit(MOVE_CLEANUP_VECTOR, used_vectors);
>>  
>>      return 0;
>>  }
>> diff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/smpboot.c
>> --- a/xen/arch/x86/smpboot.c Mon Sep 05 15:10:28 2011 +0100
>> +++ b/xen/arch/x86/smpboot.c Wed Sep 07 16:00:55 2011 +0100
>> @@ -1027,7 +1027,7 @@ void __init smp_intr_init(void)
>>      }
>>  
>>      /* IPI for cleanuping vectors after irq move */
>> -    set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
>> +    set_intr_gate(MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
>>  
>>      /* IPI for event checking. */
>>      set_intr_gate(EVENT_CHECK_VECTOR, event_check_interrupt);
>> diff -r 0268e7380953 -r c7884dbb6f7d
>> xen/include/asm-x86/mach-default/irq_vectors.h
>> --- a/xen/include/asm-x86/mach-default/irq_vectors.h Mon Sep 05 15:10:28 2011
>> +0100
>> +++ b/xen/include/asm-x86/mach-default/irq_vectors.h Wed Sep 07 16:00:55 2011
>> +0100
>> @@ -11,12 +11,14 @@
>>  #define LOCAL_TIMER_VECTOR 0xf9
>>  #define PMU_APIC_VECTOR  0xf8
>>  #define CMCI_APIC_VECTOR 0xf7
>> +#define MOVE_CLEANUP_VECTOR 0xf6
>> +
>>  /*
>>   * High-priority dynamically-allocated vectors. For interrupts that
>>   * must be higher priority than any guest-bound interrupt.
>>   */
>>  #define FIRST_HIPRIORITY_VECTOR 0xf0
>> -#define LAST_HIPRIORITY_VECTOR  0xf6
>> +#define LAST_HIPRIORITY_VECTOR 0xf5
>>  
>>  /* Legacy PIC uses vectors 0xe0-0xef. */
>>  #define FIRST_LEGACY_VECTOR 0xe0
>> @@ -30,8 +32,6 @@
>>  #define LAST_DYNAMIC_VECTOR 0xdf
>>  #define NR_DYNAMIC_VECTORS (LAST_DYNAMIC_VECTOR - FIRST_DYNAMIC_VECTOR + 1)
>>  
>> -#define IRQ_MOVE_CLEANUP_VECTOR FIRST_DYNAMIC_VECTOR
>> -
>>  #define NR_VECTORS 256
>>  
>>  #endif /* _ASM_IRQ_VECTORS_H */
>> 
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>> http://lists.xensource.com/xen-devel
> 
> 
> 
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