The HVM domain with PV driver always panics after save/restore or
migration. This patch fixes it.
Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>
diff -r f2457c7aff8d xen/arch/ia64/linux-xen/entry.S
--- a/xen/arch/ia64/linux-xen/entry.S Fri Apr 25 20:13:52 2008 +0900
+++ b/xen/arch/ia64/linux-xen/entry.S Thu May 08 19:25:17 2008 +0900
@@ -651,13 +651,37 @@ GLOBAL_ENTRY(ia64_ret_from_clone)
#ifdef XEN
// new domains are cloned but not exec'ed so switch to user mode here
cmp.ne pKStk,pUStk=r0,r0
- adds r16 = IA64_VCPU_FLAGS_OFFSET, r13
- ;;
- ld8 r16 = [r16]
- ;;
- cmp.ne p6,p7 = r16, r0
- (p6) br.cond.spnt ia64_leave_hypervisor /* VTi */
- (p7) br.cond.spnt ia64_leave_kernel /* !VTi */
+ adds r16 = IA64_VCPU_FLAGS_OFFSET, r13
+ ;;
+ ld8 r16 = [r16] // arch.arch_vmx.flags
+ ;;
+ cmp.eq p6,p0 = r16, r0
+(p6) br.cond.spnt ia64_leave_kernel // !VMX_DOMAIN
+ ;;
+ adds r16 = PT(CR_IFS)+16, r12
+ ;;
+ ld8 r16 = [r16]
+ cmp.eq pNonSys,pSys=r0,r0 // pSys=0,pNonSys=1
+ ;;
+ cmp.eq p6,p7 = 0x6, r16
+(p7) br.cond.sptk ia64_leave_hypervisor // VMX_DOMAIN
+ ;;
+ /*
+ * cr.ifs.v==0 && cr.ifm(ar.pfm)==6 means that HYPERVISOR_suspend
+ * has been called. (i.e. HVM with PV driver is restored here)
+ * We need to allocate a dummy RSE stack frame to resume.
+ */
+ alloc r32=ar.pfs, 0, 0, 6, 0
+ cmp.eq pSys,pNonSys=r0,r0 // pSys=1,pNonSys=0
+ ;;
+ bsw.0
+ ;;
+ mov r21=r13 // set current
+ ;;
+ bsw.1
+ ;;
+ mov r8=r0
+ br.cond.sptk.many ia64_leave_hypercall
#else
.ret8:
adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
diff -r f2457c7aff8d xen/arch/ia64/vmx/vmx_init.c
--- a/xen/arch/ia64/vmx/vmx_init.c Fri Apr 25 20:13:52 2008 +0900
+++ b/xen/arch/ia64/vmx/vmx_init.c Fri May 09 17:05:13 2008 +0900
@@ -55,7 +55,6 @@
#include <asm/vhpt.h>
#include <asm/vmx_pal_vsa.h>
#include <asm/patch.h>
-#include "entry.h"
/* Global flag to identify whether Intel vmx feature is on */
u32 vmx_enabled = 0;
@@ -532,10 +531,6 @@ vmx_final_setup_guest(struct vcpu *v)
/* Set up guest 's indicator for VTi domain*/
set_bit(ARCH_VMX_DOMAIN, &v->arch.arch_vmx.flags);
- /* Initialize pNonSys=1 for the first context switching */
- sw = (struct switch_stack *)vcpu_regs(v) - 1;
- sw->pr = (1UL << PRED_NON_SYSCALL);
-
return 0;
}
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