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

[Yang Zhang <yang.z.zhang@xxxxxxxxx>]

From: Yang Zhang <yang.z.zhang@xxxxxxxxx>

Introduce interrupt source to determine the source of interrupt that inject
to L1.

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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