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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [IA64] vti fault handler clean up: fix vmx_break_fault and vmx_ia64_handle_break
# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1197665046 25200
# Node ID 2d01937021703d2ec5cc8c37faf73fd75b028d0b
# Parent 5ab3288e5b0fab956d0346b16d4f56e41a457aef
[IA64] vti fault handler clean up: fix vmx_break_fault and vmx_ia64_handle_break
vmx_break_fault and vmx_ia64_handle_break() should check cr.ipsr.vm bit
so that they can handle break fault in xen.
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
xen/arch/ia64/vmx/vmx_fault.c | 22 ++++++++++++----------
xen/arch/ia64/vmx/vmx_ivt.S | 20 +++++++-------------
xen/arch/ia64/xen/xenmisc.c | 11 -----------
xen/include/asm-ia64/domain.h | 5 +++++
xen/include/asm-ia64/vmx.h | 1 -
5 files changed, 24 insertions(+), 35 deletions(-)
diff -r 5ab3288e5b0f -r 2d0193702170 xen/arch/ia64/vmx/vmx_fault.c
--- a/xen/arch/ia64/vmx/vmx_fault.c Fri Dec 14 13:40:29 2007 -0700
+++ b/xen/arch/ia64/vmx/vmx_fault.c Fri Dec 14 13:44:06 2007 -0700
@@ -56,7 +56,6 @@
#define INITIAL_PSR_VALUE_AT_INTERRUPTION 0x0000001808028034
-extern void die_if_kernel(char *str, struct pt_regs *regs, long err);
extern void rnat_consumption (VCPU *vcpu);
extern void alt_itlb (VCPU *vcpu, u64 vadr);
extern void itlb_fault (VCPU *vcpu, u64 vadr);
@@ -177,7 +176,7 @@ vmx_ia64_handle_break (unsigned long ifa
perfc_incr(vmx_ia64_handle_break);
#ifdef CRASH_DEBUG
- if ((iim == 0 || iim == CDB_BREAK_NUM) && !guest_mode(regs) &&
+ if ((iim == 0 || iim == CDB_BREAK_NUM) && !vmx_user_mode(regs) &&
IS_VMM_ADDRESS(regs->cr_iip)) {
if (iim == 0)
show_registers(regs);
@@ -185,17 +184,20 @@ vmx_ia64_handle_break (unsigned long ifa
} else
#endif
{
- if (iim == 0)
- vmx_die_if_kernel("Break 0 in Hypervisor.", regs, iim);
+ if (!vmx_user_mode(regs)) {
+ show_registers(regs);
+ gdprintk(XENLOG_DEBUG, "%s:%d imm %lx\n", __func__, __LINE__, iim);
+ ia64_fault(11 /* break fault */, isr, ifa, iim,
+ 0 /* cr.itir */, 0, 0, 0, (unsigned long)regs);
+ }
if (ia64_psr(regs)->cpl == 0) {
/* Allow hypercalls only when cpl = 0. */
- if (iim == d->arch.breakimm) {
- ia64_hypercall(regs);
- vcpu_increment_iip(v);
- return IA64_NO_FAULT;
- }
- else if (iim == DOMN_PAL_REQUEST) {
+
+ /* normal hypercalls are handled by vmx_break_fault */
+ BUG_ON(iim == d->arch.breakimm);
+
+ if (iim == DOMN_PAL_REQUEST) {
pal_emul(v);
vcpu_increment_iip(v);
return IA64_NO_FAULT;
diff -r 5ab3288e5b0f -r 2d0193702170 xen/arch/ia64/vmx/vmx_ivt.S
--- a/xen/arch/ia64/vmx/vmx_ivt.S Fri Dec 14 13:40:29 2007 -0700
+++ b/xen/arch/ia64/vmx/vmx_ivt.S Fri Dec 14 13:44:06 2007 -0700
@@ -461,14 +461,10 @@ ENTRY(vmx_break_fault)
mov r31=pr
mov r19=11
mov r17=cr.iim
- ;;
-#ifdef VTI_DEBUG
- // break 0 is already handled in vmx_ia64_handle_break.
- cmp.eq p6,p7=r17,r0
- (p6) br.sptk vmx_fault_11
- ;;
-#endif
mov r29=cr.ipsr
+ ;;
+ tbit.z p6,p0=r29,IA64_PSR_VM_BIT
+(p6)br.sptk.many vmx_dispatch_break_fault /* make sure before access [r21] */
adds r22=IA64_VCPU_BREAKIMM_OFFSET, r21
;;
ld4 r22=[r22]
@@ -1426,7 +1422,7 @@ END(vmx_dispatch_tlb_miss)
END(vmx_dispatch_tlb_miss)
ENTRY(vmx_dispatch_break_fault)
- VMX_SAVE_MIN_WITH_COVER
+ VMX_SAVE_MIN_WITH_COVER_NO_PANIC
;;
alloc r14=ar.pfs,0,0,4,0 // now it's safe (must be first in insn group!)
mov out0=cr.ifa
@@ -1439,12 +1435,12 @@ ENTRY(vmx_dispatch_break_fault)
srlz.i // guarantee that interruption collection is on
;;
(p15)ssm psr.i // restore psr.i
- movl r14=ia64_leave_hypervisor
- ;;
+(pUStk)movl r14=ia64_leave_hypervisor
+ ;;
+(pKStk)movl r14=ia64_leave_nested
VMX_SAVE_REST
mov rp=r14
;;
- P6_BR_CALL_PANIC(.Lvmx_dispatch_break_fault_string)
adds out1=16,sp
br.call.sptk.many b6=vmx_ia64_handle_break
;;
@@ -1478,5 +1474,3 @@ END(vmx_dispatch_interrupt)
.asciz "vmx_dispatch_vexirq\n"
.Lvmx_dispatch_tlb_miss_string:
.asciz "vmx_dispatch_tlb_miss\n"
-.Lvmx_dispatch_break_fault_string:
- .asciz "vmx_dispatch_break_fault\n"
diff -r 5ab3288e5b0f -r 2d0193702170 xen/arch/ia64/xen/xenmisc.c
--- a/xen/arch/ia64/xen/xenmisc.c Fri Dec 14 13:40:29 2007 -0700
+++ b/xen/arch/ia64/xen/xenmisc.c Fri Dec 14 13:44:06 2007 -0700
@@ -69,17 +69,6 @@ void die_if_kernel(char *str, struct pt_
domain_crash_synchronous();
}
-void vmx_die_if_kernel(char *str, struct pt_regs *regs, long err)
-{
- if (vmx_user_mode(regs))
- return;
-
- printk("%s: %s %ld\n", __func__, str, err);
- debugtrace_dump();
- show_registers(regs);
- domain_crash_synchronous();
-}
-
long
ia64_peek (struct task_struct *child, struct switch_stack *child_stack,
unsigned long user_rbs_end, unsigned long addr, long *val)
diff -r 5ab3288e5b0f -r 2d0193702170 xen/include/asm-ia64/domain.h
--- a/xen/include/asm-ia64/domain.h Fri Dec 14 13:40:29 2007 -0700
+++ b/xen/include/asm-ia64/domain.h Fri Dec 14 13:44:06 2007 -0700
@@ -306,6 +306,11 @@ do_perfmon_op(unsigned long cmd,
do_perfmon_op(unsigned long cmd,
XEN_GUEST_HANDLE(void) arg1, unsigned long arg2);
+void
+ia64_fault(unsigned long vector, unsigned long isr, unsigned long ifa,
+ unsigned long iim, unsigned long itir, unsigned long arg5,
+ unsigned long arg6, unsigned long arg7, unsigned long stack);
+
#endif /* __ASM_DOMAIN_H__ */
/*
diff -r 5ab3288e5b0f -r 2d0193702170 xen/include/asm-ia64/vmx.h
--- a/xen/include/asm-ia64/vmx.h Fri Dec 14 13:40:29 2007 -0700
+++ b/xen/include/asm-ia64/vmx.h Fri Dec 14 13:44:06 2007 -0700
@@ -52,7 +52,6 @@ extern void rsv_reg_field (struct vcpu *
extern void rsv_reg_field (struct vcpu *vcpu);
extern void vmx_relinquish_guest_resources(struct domain *d);
extern void vmx_relinquish_vcpu_resources(struct vcpu *v);
-extern void vmx_die_if_kernel(char *str, struct pt_regs *regs, long err);
extern void vmx_send_assist_req(struct vcpu *v);
extern void deliver_pal_init(struct vcpu *vcpu);
extern void vmx_pend_pal_init(struct domain *d);
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