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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] ia64: Add fast reflection for most clock ticks
ChangeSet 1.1726.1.6, 2005/06/23 12:59:01-06:00, djm@xxxxxxxxxxxxxxx
ia64: Add fast reflection for most clock ticks
Also, some additional debug output for various situations.
Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxx>
asm-offsets.c | 1
domain.c | 2
hypercall.c | 3
hyperprivop.S | 198 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---
ivt.S | 20 +++++
privop.c | 1
process.c | 8 +-
7 files changed, 220 insertions(+), 13 deletions(-)
diff -Nru a/xen/arch/ia64/asm-offsets.c b/xen/arch/ia64/asm-offsets.c
--- a/xen/arch/ia64/asm-offsets.c 2005-06-29 18:03:06 -04:00
+++ b/xen/arch/ia64/asm-offsets.c 2005-06-29 18:03:06 -04:00
@@ -88,6 +88,7 @@
BLANK();
DEFINE(IA64_CPUINFO_ITM_NEXT_OFFSET, offsetof (struct cpuinfo_ia64,
itm_next));
+ DEFINE(IA64_CPUINFO_PGD_QUICK_OFFSET, offsetof (struct cpuinfo_ia64,
pgd_quick));
//DEFINE(IA64_SIGHAND_SIGLOCK_OFFSET,offsetof (struct sighand_struct,
siglock));
diff -Nru a/xen/arch/ia64/domain.c b/xen/arch/ia64/domain.c
--- a/xen/arch/ia64/domain.c 2005-06-29 18:03:06 -04:00
+++ b/xen/arch/ia64/domain.c 2005-06-29 18:03:06 -04:00
@@ -50,7 +50,7 @@
//FIXME: alignment should be 256MB, lest Linux use a 256MB page size
unsigned long dom0_align = 256*1024*1024;
#else // CONFIG_VTI
-unsigned long dom0_size = 256*1024*1024; //FIXME: Should be configurable
+unsigned long dom0_size = 512*1024*1024; //FIXME: Should be configurable
//FIXME: alignment should be 256MB, lest Linux use a 256MB page size
unsigned long dom0_align = 64*1024*1024;
#endif // CONFIG_VTI
diff -Nru a/xen/arch/ia64/hypercall.c b/xen/arch/ia64/hypercall.c
--- a/xen/arch/ia64/hypercall.c 2005-06-29 18:03:06 -04:00
+++ b/xen/arch/ia64/hypercall.c 2005-06-29 18:03:06 -04:00
@@ -43,7 +43,8 @@
#if 1
#define SPURIOUS_VECTOR 15
if (vcpu_check_pending_interrupts(v)!=SPURIOUS_VECTOR) {
-//printf("Domain trying to go idle when interrupt pending!\n");
+// int pi = vcpu_check_pending_interrupts(v);
+//printf("idle w/int#%d pending!\n",pi);
//this shouldn't happen, but it apparently does quite a bit! so don't
//allow it to happen... i.e. if a domain has an interrupt pending and
//it tries to halt itself because it thinks it is idle, just return here
diff -Nru a/xen/arch/ia64/hyperprivop.S b/xen/arch/ia64/hyperprivop.S
--- a/xen/arch/ia64/hyperprivop.S 2005-06-29 18:03:06 -04:00
+++ b/xen/arch/ia64/hyperprivop.S 2005-06-29 18:03:06 -04:00
@@ -17,6 +17,10 @@
#define FAST_HYPERPRIVOP_CNT
#define FAST_REFLECT_CNT
+// FIXME: This is defined in include/asm-ia64/hw_irq.h but this
+// doesn't appear to be include'able from assembly?
+#define IA64_TIMER_VECTOR 0xef
+
// Should be included from common header file (also in process.c)
// NO PSR_CLR IS DIFFERENT! (CPL)
#define IA64_PSR_CPL1 (__IA64_UL(1) << IA64_PSR_CPL1_BIT)
@@ -241,14 +245,23 @@
adds r2=XSI_BANK1_OFS-XSI_PSR_IC_OFS,r18;
adds r3=(XSI_BANK1_OFS+8)-XSI_PSR_IC_OFS,r18;;
bsw.1;;
- st8 [r2]=r16,16; st8 [r3]=r17,16 ;;
- st8 [r2]=r18,16; st8 [r3]=r19,16 ;;
- st8 [r2]=r20,16; st8 [r3]=r21,16 ;;
- st8 [r2]=r22,16; st8 [r3]=r23,16 ;;
- st8 [r2]=r24,16; st8 [r3]=r25,16 ;;
- st8 [r2]=r26,16; st8 [r3]=r27,16 ;;
- st8 [r2]=r28,16; st8 [r3]=r29,16 ;;
- st8 [r2]=r30,16; st8 [r3]=r31,16 ;;
+ // FIXME: need to handle ar.unat!
+ .mem.offset 0,0; st8.spill [r2]=r16,16;
+ .mem.offset 8,0; st8.spill [r3]=r17,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r18,16;
+ .mem.offset 8,0; st8.spill [r3]=r19,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r20,16;
+ .mem.offset 8,0; st8.spill [r3]=r21,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r22,16;
+ .mem.offset 8,0; st8.spill [r3]=r23,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r24,16;
+ .mem.offset 8,0; st8.spill [r3]=r25,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r26,16;
+ .mem.offset 8,0; st8.spill [r3]=r27,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r28,16;
+ .mem.offset 8,0; st8.spill [r3]=r29,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r30,16;
+ .mem.offset 8,0; st8.spill [r3]=r31,16 ;;
movl r31=XSI_IPSR;;
bsw.0 ;;
mov r2=r30; mov r3=r29;;
@@ -257,6 +270,175 @@
mov pr=r31,-1 ;;
rfi
;;
+
+// reflect domain clock interrupt
+// r31 == pr
+// r30 == cr.ivr
+// r29 == rp
+GLOBAL_ENTRY(fast_tick_reflect)
+#define FAST_TICK
+#ifndef FAST_TICK
+ br.cond.sptk.many rp;;
+#endif
+ mov r28=IA64_TIMER_VECTOR;;
+ cmp.ne p6,p0=r28,r30
+(p6) br.cond.sptk.many rp;;
+ movl r20=(PERCPU_ADDR)+IA64_CPUINFO_ITM_NEXT_OFFSET;;
+ ld8 r21=[r20];;
+ mov r27=ar.itc;;
+ cmp.ltu p6,p0=r21,r27
+(p6) br.cond.sptk.many rp;;
+ mov r17=cr.ipsr;;
+ // slow path if: ipsr.be==1, ipsr.pp==1
+ extr.u r21=r17,IA64_PSR_BE_BIT,1 ;;
+ cmp.ne p6,p0=r21,r0
+(p6) br.cond.sptk.many rp;;
+ extr.u r21=r17,IA64_PSR_PP_BIT,1 ;;
+ cmp.ne p6,p0=r21,r0
+(p6) br.cond.sptk.many rp;;
+#ifdef FAST_REFLECT_CNT
+ movl r20=fast_reflect_count+((0x3000>>8)*8);;
+ ld8 r21=[r20];;
+ adds r21=1,r21;;
+ st8 [r20]=r21;;
+#endif
+ mov cr.eoi=r0;;
+ mov rp=r29;;
+ // vcpu_pend_timer(current)
+ movl r18=XSI_PSR_IC;;
+ adds r20=XSI_ITV_OFS-XSI_PSR_IC_OFS,r18 ;;
+ ld8 r20=[r20];;
+ cmp.eq p6,p0=r20,r0 // if cr.itv==0 done
+(p6) br.cond.sptk.many fast_tick_reflect_done;;
+ tbit.nz p6,p0=r20,16;; // check itv.m (discard) bit
+(p6) br.cond.sptk.many fast_tick_reflect_done;;
+ extr.u r27=r20,0,6 // r27 has low 6 bits of itv.vector
+ extr.u r26=r20,6,2;; // r26 has irr index of itv.vector
+ mov r19=IA64_KR(CURRENT);;
+ adds r22=IA64_VCPU_DOMAIN_ITM_LAST_OFFSET,r19
+ adds r23=IA64_VCPU_DOMAIN_ITM_OFFSET,r19;;
+ ld8 r24=[r22];;
+ ld8 r23=[r23];;
+ cmp.eq p6,p0=r23,r24 // skip if this tick already delivered
+(p6) br.cond.sptk.many fast_tick_reflect_done;;
+ // set irr bit
+ adds r21=IA64_VCPU_IRR0_OFFSET,r19;
+ shl r26=r26,3;;
+ add r21=r21,r26;;
+ mov r25=1;;
+ shl r22=r25,r27;;
+ ld8 r23=[r21];;
+ or r22=r22,r23;;
+ st8 [r21]=r22;;
+ // set PSCB(pending_interruption)!
+ adds r20=XSI_PEND_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st4 [r20]=r25;;
+
+ // if interrupted at pl0, we're done
+ extr.u r16=r17,IA64_PSR_CPL0_BIT,2;;
+ cmp.eq p6,p0=r16,r0;;
+(p6) br.cond.sptk.many fast_tick_reflect_done;;
+ // now deliver to iva+0x3000
+ // r17 == cr.ipsr
+ // r18 == XSI_PSR_IC
+ // r19 == IA64_KR(CURRENT)
+ // r31 == pr
+
+ // if guest vpsr.i is off, we're done
+ adds r21=XSI_PSR_I_OFS-XSI_PSR_IC_OFS,r18 ;;
+ ld4 r21=[r21];;
+ cmp.eq p6,p0=r21,r0
+(p6) br.cond.sptk.many fast_tick_reflect_done;;
+
+ // OK, we have a clock tick to deliver to the active domain!
+ mov r16=cr.isr;;
+ mov r29=cr.iip;;
+ adds r21=XSI_IIP_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st8 [r21]=r29 ;;
+ // set shared_mem isr
+ extr.u r16=r16,38,1;; // grab cr.isr.ir bit
+ dep r16=r16,r0,38,1 ;; // insert into cr.isr (rest of bits zero)
+ extr.u r20=r17,41,2 ;; // get ipsr.ri
+ dep r16=r20,r16,41,2 ;; // deposit cr.isr.ei
+ adds r21=XSI_ISR_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st8 [r21]=r16 ;;
+ // set cr.ipsr (make sure cpl==2!)
+ mov r29=r17 ;;
+ movl r28=DELIVER_PSR_SET;;
+ movl r27=~(DELIVER_PSR_CLR|IA64_PSR_CPL0);;
+ or r29=r29,r28;;
+ and r29=r29,r27;;
+ mov cr.ipsr=r29;;
+ // set shared_mem ipsr (from ipsr in r17 with ipsr.ri already set)
+ extr.u r29=r17,IA64_PSR_CPL0_BIT,2;;
+ cmp.eq p6,p7=3,r29;;
+(p6) dep r17=-1,r17,IA64_PSR_CPL0_BIT,2
+(p7) dep r17=0,r17,IA64_PSR_CPL0_BIT,2
+ ;;
+ movl r28=(IA64_PSR_DT|IA64_PSR_IT|IA64_PSR_RT);;
+ movl r27=~(IA64_PSR_BE|IA64_PSR_PP|IA64_PSR_BN|IA64_PSR_I|IA64_PSR_IC);;
+ dep r21=-1,r21,IA64_PSR_CPL1_BIT,1 ;;
+ or r17=r17,r28;;
+ and r17=r17,r27;;
+ ld4 r16=[r18],4;;
+ cmp.ne p6,p0=r16,r0;;
+(p6) dep r17=-1,r17,IA64_PSR_IC_BIT,1 ;;
+ ld4 r16=[r18],-4;;
+ cmp.ne p6,p0=r16,r0;;
+(p6) dep r17=-1,r17,IA64_PSR_I_BIT,1 ;;
+ adds r21=XSI_IPSR_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st8 [r21]=r17 ;;
+ // set shared_mem interrupt_delivery_enabled to 0
+ // set shared_mem interrupt_collection_enabled to 0
+ st8 [r18]=r0;;
+ // cover and set shared_mem precover_ifs to cr.ifs
+ // set shared_mem ifs and incomplete_regframe to 0
+ cover ;;
+ mov r20=cr.ifs;;
+ adds r21=XSI_INCOMPL_REG_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st4 [r21]=r0 ;;
+ adds r21=XSI_IFS_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st8 [r21]=r0 ;;
+ adds r21=XSI_PRECOVER_IFS_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st8 [r21]=r20 ;;
+ // leave cr.ifs alone for later rfi
+ // set iip to go to domain IVA break instruction vector
+ adds r22=IA64_VCPU_IVA_OFFSET,r19;;
+ ld8 r23=[r22];;
+ movl r24=0x3000;;
+ add r24=r24,r23;;
+ mov cr.iip=r24;;
+ // OK, now all set to go except for switch to virtual bank0
+ mov r30=r2; mov r29=r3;;
+ adds r2=XSI_BANK1_OFS-XSI_PSR_IC_OFS,r18;
+ adds r3=(XSI_BANK1_OFS+8)-XSI_PSR_IC_OFS,r18;;
+ bsw.1;;
+ // FIXME: need to handle ar.unat!
+ .mem.offset 0,0; st8.spill [r2]=r16,16;
+ .mem.offset 8,0; st8.spill [r3]=r17,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r18,16;
+ .mem.offset 8,0; st8.spill [r3]=r19,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r20,16;
+ .mem.offset 8,0; st8.spill [r3]=r21,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r22,16;
+ .mem.offset 8,0; st8.spill [r3]=r23,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r24,16;
+ .mem.offset 8,0; st8.spill [r3]=r25,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r26,16;
+ .mem.offset 8,0; st8.spill [r3]=r27,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r28,16;
+ .mem.offset 8,0; st8.spill [r3]=r29,16 ;;
+ .mem.offset 0,0; st8.spill [r2]=r30,16;
+ .mem.offset 8,0; st8.spill [r3]=r31,16 ;;
+ movl r31=XSI_IPSR;;
+ bsw.0 ;;
+ mov r2=r30; mov r3=r29;;
+ adds r20=XSI_BANKNUM_OFS-XSI_PSR_IC_OFS,r18 ;;
+ st4 [r20]=r0 ;;
+fast_tick_reflect_done:
+ mov pr=r31,-1 ;;
+ rfi
+END(fast_tick_reflect)
// reflect domain breaks directly to domain
// FIXME: DOES NOT WORK YET
diff -Nru a/xen/arch/ia64/ivt.S b/xen/arch/ia64/ivt.S
--- a/xen/arch/ia64/ivt.S 2005-06-29 18:03:06 -04:00
+++ b/xen/arch/ia64/ivt.S 2005-06-29 18:03:06 -04:00
@@ -919,6 +919,21 @@
DBG_FAULT(12)
mov r31=pr // prepare to save predicates
;;
+#ifdef XEN
+ mov r30=cr.ivr // pass cr.ivr as first arg
+ // FIXME: this is a hack... use cpuinfo.pgd_quick because its
+ // not used anywhere else and we need a place to stash ivr and
+ // there's no registers available unused by SAVE_MIN/REST
+ movl r29=(PERCPU_ADDR)+IA64_CPUINFO_PGD_QUICK_OFFSET;;
+ st8 [r29]=r30;;
+ movl r28=slow_interrupt;;
+ mov r29=rp;;
+ mov rp=r28;;
+ br.cond.sptk.many fast_tick_reflect
+ ;;
+slow_interrupt:
+ mov rp=r29;;
+#endif
SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3
ssm psr.ic | PSR_DEFAULT_BITS
;;
@@ -928,7 +943,12 @@
SAVE_REST
;;
alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
+#ifdef XEN
+ movl out0=(PERCPU_ADDR)+IA64_CPUINFO_PGD_QUICK_OFFSET;;
+ ld8 out0=[out0];;
+#else
mov out0=cr.ivr // pass cr.ivr as first arg
+#endif
add out1=16,sp // pass pointer to pt_regs as second arg
;;
srlz.d // make sure we see the effect of cr.ivr
diff -Nru a/xen/arch/ia64/privop.c b/xen/arch/ia64/privop.c
--- a/xen/arch/ia64/privop.c 2005-06-29 18:03:06 -04:00
+++ b/xen/arch/ia64/privop.c 2005-06-29 18:03:06 -04:00
@@ -781,6 +781,7 @@
// FIXME: Handle faults appropriately for these
if (!iim || iim > HYPERPRIVOP_MAX) {
printf("bad hyperprivop; ignored\n");
+ printf("iim=%d, iip=%p\n",iim,regs->cr_iip);
return 1;
}
slow_hyperpriv_cnt[iim]++;
diff -Nru a/xen/arch/ia64/process.c b/xen/arch/ia64/process.c
--- a/xen/arch/ia64/process.c 2005-06-29 18:03:06 -04:00
+++ b/xen/arch/ia64/process.c 2005-06-29 18:03:06 -04:00
@@ -191,8 +191,8 @@
if (vector != IA64_DATA_TLB_VECTOR &&
vector != IA64_ALT_DATA_TLB_VECTOR &&
vector != IA64_VHPT_TRANS_VECTOR) {
-panic_domain(regs,"psr.ic off, delivering
fault=%lx,iip=%p,ifa=%p,isr=%p,PSCB.iip=%p\n",
- vector,regs->cr_iip,ifa,isr,PSCB(v,iip));
+panic_domain(regs,"psr.ic off, delivering
fault=%lx,ipsr=%p,iip=%p,ifa=%p,isr=%p,PSCB.iip=%p\n",
+ vector,regs->cr_ipsr,regs->cr_iip,ifa,isr,PSCB(v,iip));
}
//printf("Delivering NESTED DATA TLB fault\n");
@@ -754,7 +754,8 @@
vcpu_set_gr(current,8,-1L);
break;
default:
- printf("ia64_handle_break: bad ssc code %lx, iip=%p,
b0=%p\n",ssc,regs->cr_iip,regs->b0);
+ printf("ia64_handle_break: bad ssc code %lx, iip=%p, b0=%p...
spinning\n",ssc,regs->cr_iip,regs->b0);
+ while(1);
break;
}
vcpu_increment_iip(current);
@@ -845,6 +846,7 @@
break;
case 26:
printf("*** NaT fault... attempting to handle as privop\n");
+printf("isr=%p, ifa=%p,iip=%p,ipsr=%p\n",isr,ifa,regs->cr_iip,psr);
vector = priv_emulate(v,regs,isr);
if (vector == IA64_NO_FAULT) {
printf("*** Handled privop masquerading as NaT fault\n");
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