ChangeSet 1.1713.2.12, 2005/06/20 14:36:39-06:00, djm@xxxxxxxxxxxxxxx
More hyperprivop work
Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxx>
asm-offsets.c | 2 ++
hyperprivop.S | 47 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)
diff -Nru a/xen/arch/ia64/asm-offsets.c b/xen/arch/ia64/asm-offsets.c
--- a/xen/arch/ia64/asm-offsets.c 2005-06-23 07:03:54 -04:00
+++ b/xen/arch/ia64/asm-offsets.c 2005-06-23 07:03:54 -04:00
@@ -79,8 +79,10 @@
DEFINE(IA64_VCPU_IRR0_OFFSET, offsetof (struct vcpu, arch.irr[0]));
DEFINE(IA64_VCPU_IRR3_OFFSET, offsetof (struct vcpu, arch.irr[3]));
DEFINE(IA64_VCPU_INSVC3_OFFSET, offsetof (struct vcpu, arch.insvc[3]));
+ DEFINE(IA64_VCPU_DOMAIN_ITM_OFFSET, offsetof (struct vcpu,
arch.domain_itm));
BLANK();
+ DEFINE(IA64_CPUINFO_ITM_NEXT_OFFSET, offsetof (struct cpuinfo_ia64,
itm_next));
//DEFINE(IA64_SIGHAND_SIGLOCK_OFFSET,offsetof (struct sighand_struct,
siglock));
diff -Nru a/xen/arch/ia64/hyperprivop.S b/xen/arch/ia64/hyperprivop.S
--- a/xen/arch/ia64/hyperprivop.S 2005-06-23 07:03:54 -04:00
+++ b/xen/arch/ia64/hyperprivop.S 2005-06-23 07:03:54 -04:00
@@ -97,6 +97,10 @@
cmp.eq p7,p6=XEN_HYPER_EOI,r17
(p7) br.sptk.many hyper_eoi;;
+ // HYPERPRIVOP_SET_ITM?
+ cmp.eq p7,p6=XEN_HYPER_SET_ITM,r17
+(p7) br.sptk.many hyper_set_itm;;
+
// if not one of the above, give up for now and do it the slow way
br.sptk.many dispatch_break_fault ;;
@@ -802,3 +806,46 @@
rfi
;;
END(hyper_eoi)
+
+ENTRY(hyper_set_itm)
+ // when we get to here r20=~=interrupts pending
+ cmp.ne p7,p0=r20,r0
+(p7) br.spnt.many dispatch_break_fault ;;
+#ifdef FAST_HYPERPRIVOP_CNT
+ movl r20=fast_hyperpriv_cnt+(8*XEN_HYPER_SET_ITM);;
+ ld8 r21=[r20];;
+ adds r21=1,r21;;
+ st8 [r20]=r21;;
+#endif
+ movl r20=(PERCPU_ADDR)+IA64_CPUINFO_ITM_NEXT_OFFSET;;
+ ld8 r21=[r20];;
+ mov r20=IA64_KR(CURRENT);;
+ adds r20=IA64_VCPU_DOMAIN_ITM_OFFSET,r20;;
+ st8 [r20]=r8;;
+ cmp.geu p6,p0=r21,r8;;
+(p6) mov r21=r8;;
+ // now "safe set" cr.itm=r21
+ mov r23=100;;
+2: mov cr.itm=r21;;
+ srlz.d;;
+ mov r22=ar.itc ;;
+ cmp.leu p6,p0=r21,r22;;
+ add r21=r21,r23;;
+ shl r23=r23,1;;
+(p6) br.cond.spnt.few 2b;;
+1: mov r24=cr.ipsr
+ mov r25=cr.iip;;
+ extr.u r26=r24,41,2 ;;
+ cmp.eq p6,p7=2,r26 ;;
+(p6) mov r26=0
+(p6) adds r25=16,r25
+(p7) adds r26=1,r26
+ ;;
+ dep r24=r26,r24,41,2
+ ;;
+ mov cr.ipsr=r24
+ mov cr.iip=r25
+ mov pr=r31,-1 ;;
+ rfi
+ ;;
+END(hyper_set_itm)
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