From: awilliam@xenbuild.aw <awilliam@xenbuild.aw>
Date: Sat, 3 Jun 2006 21:34:07 +0000 (-0600)
Subject: [IA64] Handle VTi's fp fault & trap in hypervisor instead of injecting to guest
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~15998
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=c280ab99c5f820b166ad1a5962681fd82fa9e4c7;p=xen.git

[IA64] Handle VTi's fp fault & trap in hypervisor instead of injecting to guest

Signed-off-by : Zhang xiantao <xiantao.zhang@intel.com>
Signed-off-by : Kevin Tian    <kevin.tian@intel.com>
---

diff --git a/xen/arch/ia64/vmx/vmx_process.c b/xen/arch/ia64/vmx/vmx_process.c
index b86bee57ef..c6e4d0220c 100644
--- a/xen/arch/ia64/vmx/vmx_process.c
+++ b/xen/arch/ia64/vmx/vmx_process.c
@@ -62,6 +62,7 @@ extern unsigned long translate_domain_mpaddr(unsigned long mpaddr);
 extern void alt_itlb (VCPU *vcpu, u64 vadr);
 extern void itlb_fault (VCPU *vcpu, u64 vadr);
 extern void ivhpt_fault (VCPU *vcpu, u64 vadr);
+extern unsigned long handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr);
 
 #define DOMN_PAL_REQUEST    0x110000
 #define DOMN_SAL_REQUEST    0x110001
@@ -84,9 +85,20 @@ void vmx_reflect_interruption(UINT64 ifa,UINT64 isr,UINT64 iim,
     VCPU *vcpu = current;
     UINT64 vpsr = vmx_vcpu_get_psr(vcpu);
     vector=vec2off[vector];
-    if(!(vpsr&IA64_PSR_IC)&&(vector!=0x1400)){
+    if(!(vpsr&IA64_PSR_IC)&&(vector!=IA64_DATA_NESTED_TLB_VECTOR)){
         panic_domain(regs, "Guest nested fault vector=%lx!\n", vector);
     }
+    else{ // handle fpswa emulation
+        // fp fault
+        if(vector == IA64_FP_FAULT_VECTOR && !handle_fpu_swa(1, regs, isr)){
+            vmx_vcpu_increment_iip(vcpu);
+            return;
+        }
+        //fp trap
+        else if(vector == IA64_FP_TRAP_VECTOR && !handle_fpu_swa(0, regs, isr)){
+            return; 
+        }
+    }
     VCPU(vcpu,isr)=isr;
     VCPU(vcpu,iipa) = regs->cr_iip;
     if (vector == IA64_BREAK_VECTOR || vector == IA64_SPECULATION_VECTOR)
diff --git a/xen/arch/ia64/xen/process.c b/xen/arch/ia64/xen/process.c
index dc24f065d7..631b5fc209 100644
--- a/xen/arch/ia64/xen/process.c
+++ b/xen/arch/ia64/xen/process.c
@@ -447,7 +447,7 @@ fp_emulate (int fp_fault, void *bundle, unsigned long *ipsr,
 /*
  * Handle floating-point assist faults and traps for domain.
  */
-static unsigned long
+unsigned long
 handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
 {
 	struct vcpu *v = current;
@@ -477,11 +477,6 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
 		PSCBX(v, fpswa_ret) = ret;
 		printk("%s(%s): fp_emulate() returned %ld\n",
 		       __FUNCTION__, fp_fault?"fault":"trap", ret.status);
-	} else {
-		if (fp_fault) {
-			/* emulation was successful */
-			vcpu_increment_iip(v);
-		}
 	}
 
 	return ret.status;
@@ -869,7 +864,10 @@ ia64_handle_reflection (unsigned long ifa, struct pt_regs *regs, unsigned long i
 		// FIXME: Should we handle unaligned refs in Xen??
 		vector = IA64_UNALIGNED_REF_VECTOR; break;
 	    case 32:
-		if (!(handle_fpu_swa(1, regs, isr))) return;
+		if (!(handle_fpu_swa(1, regs, isr))) {
+		    vcpu_increment_iip(v);
+		    return;
+		}
 		printf("ia64_handle_reflection: handling FP fault\n");
 		vector = IA64_FP_FAULT_VECTOR; break;
 	    case 33: