[Xen-changelog] More hyperprivop work

[BitKeeper Bot <riel@xxxxxxxxxxx>]

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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