Re: [Xen-devel] [PATCH 1/7] Nested VMX: Introduce interrupt source supporting

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 09.08.13 at 10:49, Yang Zhang <yang.z.zhang@xxxxxxxxx> wrote:
> From: Yang Zhang <yang.z.zhang@xxxxxxxxx>
> 
> Introduce interrupt source to determine the source of interrupt that inject
> to L1.

So where's the consumer of that new structure field? Afaics you
only set it, but never read it.

Jan

> Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
> ---
>  xen/arch/x86/hvm/vmx/intr.c        |    4 ++--
>  xen/arch/x86/hvm/vmx/vmx.c         |   14 ++++++++------
>  xen/include/asm-x86/hvm/vmx/vmx.h  |    2 +-
>  xen/include/asm-x86/hvm/vmx/vvmx.h |    1 +
>  4 files changed, 12 insertions(+), 9 deletions(-)
> 
> diff --git a/xen/arch/x86/hvm/vmx/intr.c b/xen/arch/x86/hvm/vmx/intr.c
> index e376f3c..cb120f2 100644
> --- a/xen/arch/x86/hvm/vmx/intr.c
> +++ b/xen/arch/x86/hvm/vmx/intr.c
> @@ -180,7 +180,7 @@ static int nvmx_intr_intercept(struct vcpu *v, struct 
> hvm_intack intack)
>              if ( !(ctrl & PIN_BASED_EXT_INTR_MASK) )
>                  return 0;
>  
> -            vmx_inject_extint(intack.vector);
> +            vmx_inject_extint(intack.vector, intack.source);
>  
>              ctrl = __get_vvmcs(vcpu_nestedhvm(v).nv_vvmcx, 
> VM_EXIT_CONTROLS);
>              if ( ctrl & VM_EXIT_ACK_INTR_ON_EXIT )
> @@ -309,7 +309,7 @@ void vmx_intr_assist(void)
>      else
>      {
>          HVMTRACE_2D(INJ_VIRQ, intack.vector, /*fake=*/ 0);
> -        vmx_inject_extint(intack.vector);
> +        vmx_inject_extint(intack.vector, intack.source);
>          pt_intr_post(v, intack);
>      }
>  
> diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
> index 8ed7026..51c657f 100644
> --- a/xen/arch/x86/hvm/vmx/vmx.c
> +++ b/xen/arch/x86/hvm/vmx/vmx.c
> @@ -1208,7 +1208,7 @@ static void vmx_update_guest_efer(struct vcpu *v)
>  }
>  
>  void nvmx_enqueue_n2_exceptions(struct vcpu *v, 
> -            unsigned long intr_fields, int error_code)
> +            unsigned long intr_fields, int error_code, uint8_t source)
>  {
>      struct nestedvmx *nvmx = &vcpu_2_nvmx(v);
>  
> @@ -1216,6 +1216,7 @@ void nvmx_enqueue_n2_exceptions(struct vcpu *v,
>          /* enqueue the exception till the VMCS switch back to L1 */
>          nvmx->intr.intr_info = intr_fields;
>          nvmx->intr.error_code = error_code;
> +        nvmx->intr.source = source;
>          vcpu_nestedhvm(v).nv_vmexit_pending = 1;
>          return;
>      }
> @@ -1227,7 +1228,8 @@ void nvmx_enqueue_n2_exceptions(struct vcpu *v,
>  
>  static int nvmx_vmexit_trap(struct vcpu *v, struct hvm_trap *trap)
>  {
> -    nvmx_enqueue_n2_exceptions(v, trap->vector, trap->error_code);
> +    nvmx_enqueue_n2_exceptions(v, trap->vector, trap->error_code,
> +            hvm_intsrc_none);
>      return NESTEDHVM_VMEXIT_DONE;
>  }
>  
> @@ -1258,7 +1260,7 @@ static void __vmx_inject_exception(int trap, int type, 
> int error_code)
>          curr->arch.hvm_vmx.vmx_emulate = 1;
>  }
>  
> -void vmx_inject_extint(int trap)
> +void vmx_inject_extint(int trap, uint8_t source)
>  {
>      struct vcpu *v = current;
>      u32    pin_based_cntrl;
> @@ -1269,7 +1271,7 @@ void vmx_inject_extint(int trap)
>          if ( pin_based_cntrl & PIN_BASED_EXT_INTR_MASK ) {
>              nvmx_enqueue_n2_exceptions (v, 
>                 INTR_INFO_VALID_MASK | (X86_EVENTTYPE_EXT_INTR<<8) | trap,
> -               HVM_DELIVER_NO_ERROR_CODE);
> +               HVM_DELIVER_NO_ERROR_CODE, source);
>              return;
>          }
>      }
> @@ -1288,7 +1290,7 @@ void vmx_inject_nmi(void)
>          if ( pin_based_cntrl & PIN_BASED_NMI_EXITING ) {
>              nvmx_enqueue_n2_exceptions (v, 
>                 INTR_INFO_VALID_MASK | (X86_EVENTTYPE_NMI<<8) | TRAP_nmi,
> -               HVM_DELIVER_NO_ERROR_CODE);
> +               HVM_DELIVER_NO_ERROR_CODE, hvm_intsrc_nmi);
>              return;
>          }
>      }
> @@ -1356,7 +1358,7 @@ static void vmx_inject_trap(struct hvm_trap *trap)
>      {
>          nvmx_enqueue_n2_exceptions (curr, 
>              INTR_INFO_VALID_MASK | (_trap.type<<8) | _trap.vector,
> -            _trap.error_code); 
> +            _trap.error_code, hvm_intsrc_none);
>          return;
>      }
>      else
> diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h 
> b/xen/include/asm-x86/hvm/vmx/vmx.h
> index c33b9f9..f4d759b 100644
> --- a/xen/include/asm-x86/hvm/vmx/vmx.h
> +++ b/xen/include/asm-x86/hvm/vmx/vmx.h
> @@ -448,7 +448,7 @@ static inline int __vmxon(u64 addr)
>  
>  void vmx_get_segment_register(struct vcpu *, enum x86_segment,
>                                struct segment_register *);
> -void vmx_inject_extint(int trap);
> +void vmx_inject_extint(int trap, uint8_t source);
>  void vmx_inject_nmi(void);
>  
>  int ept_p2m_init(struct p2m_domain *p2m);
> diff --git a/xen/include/asm-x86/hvm/vmx/vvmx.h 
> b/xen/include/asm-x86/hvm/vmx/vvmx.h
> index 3874525..be2b5c6 100644
> --- a/xen/include/asm-x86/hvm/vmx/vvmx.h
> +++ b/xen/include/asm-x86/hvm/vmx/vvmx.h
> @@ -36,6 +36,7 @@ struct nestedvmx {
>      struct {
>          unsigned long intr_info;
>          u32           error_code;
> +        uint8_t       source;
>      } intr;
>      struct {
>          bool_t   enabled;
> -- 
> 1.7.1



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