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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-ia64-devel] Paravirtualized xenlinux/ia64 available
For those interested -- but not interested enough to go through
the effort to pull the bits -- here's the diffstat and diff -u.
arch/ia64/Kconfig | 4
arch/ia64/Makefile | 1
arch/ia64/hp/sim/Makefile | 2
arch/ia64/ia32/ia32_signal.c | 12 ++
arch/ia64/ia32/ia32_support.c | 8 +
arch/ia64/kernel/entry.S | 185
++++++++++++++++++++++++++++++++++++++++++
arch/ia64/kernel/ivt.S | 160
++++++++++++++++++++++++++++++++++++
arch/ia64/kernel/minstate.h | 117 ++++++++++++++++++++++++++
arch/ia64/kernel/pal.S | 16 +++
arch/ia64/kernel/setup.c | 6 +
drivers/acpi/motherboard.c | 3
include/asm-ia64/ia32.h | 4
include/asm-ia64/processor.h | 76 +++++++++++++++++
include/asm-ia64/system.h | 58 +++++++++++++
14 files changed, 652 insertions(+)
--- 1.85/arch/ia64/Kconfig Fri Jan 28 16:32:25 2005
+++ 1.86/arch/ia64/Kconfig Fri Apr 22 16:52:50 2005
@@ -46,6 +46,10 @@
bool
default y
+config XEN
+ bool
+ default y
+
choice
prompt "System type"
default IA64_GENERIC
===== arch/ia64/Makefile 1.74 vs 1.75 =====
--- 1.74/arch/ia64/Makefile Fri Jan 28 16:32:45 2005
+++ 1.75/arch/ia64/Makefile Fri Apr 22 16:52:50 2005
@@ -60,6 +60,7 @@
drivers-$(CONFIG_PCI) += arch/ia64/pci/
drivers-$(CONFIG_IA64_HP_SIM) += arch/ia64/hp/sim/
+drivers-$(CONFIG_XEN) += arch/ia64/hp/sim/
drivers-$(CONFIG_IA64_HP_ZX1) += arch/ia64/hp/common/
arch/ia64/hp/zx1/
drivers-$(CONFIG_IA64_HP_ZX1_SWIOTLB) += arch/ia64/hp/common/
arch/ia64/hp/zx1/
drivers-$(CONFIG_IA64_GENERIC) += arch/ia64/hp/common/
arch/ia64/hp/zx1/ arch/ia64/hp/sim/ arch/ia64/sn/
===== arch/ia64/hp/sim/Makefile 1.8 vs 1.9 =====
--- 1.8/arch/ia64/hp/sim/Makefile Sat Aug 16 16:58:46 2003
+++ 1.9/arch/ia64/hp/sim/Makefile Fri Apr 22 16:52:50 2005
@@ -13,4 +13,6 @@
obj-$(CONFIG_HP_SIMETH) += simeth.o
obj-$(CONFIG_HP_SIMSERIAL) += simserial.o
obj-$(CONFIG_HP_SIMSERIAL_CONSOLE) += hpsim_console.o
+obj-$(CONFIG_XEN) += simserial.o
+obj-$(CONFIG_XEN) += hpsim_console.o
obj-$(CONFIG_HP_SIMSCSI) += simscsi.o
===== arch/ia64/ia32/ia32_signal.c 1.35 vs 1.36 =====
--- 1.35/arch/ia64/ia32/ia32_signal.c Tue Jan 25 13:23:45 2005
+++ 1.36/arch/ia64/ia32/ia32_signal.c Wed May 4 14:16:59 2005
@@ -667,7 +667,11 @@
/*
* `eflags' is in an ar register for this context
*/
+#ifdef CONFIG_XEN
+ flag = xen_get_eflag();
+#else
flag = ia64_getreg(_IA64_REG_AR_EFLAG);
+#endif
err |= __put_user((unsigned int)flag, &sc->eflags);
err |= __put_user(regs->r12, &sc->esp_at_signal);
err |= __put_user((regs->r17 >> 16) & 0xffff, (unsigned int
__user *)&sc->ss);
@@ -755,10 +759,18 @@
* IA32 process's context.
*/
err |= __get_user(tmpflags, &sc->eflags);
+#ifdef CONFIG_XEN
+ flag = xen_get_eflag();
+#else
flag = ia64_getreg(_IA64_REG_AR_EFLAG);
+#endif
flag &= ~0x40DD5;
flag |= (tmpflags & 0x40DD5);
+#ifdef CONFIG_XEN
+ xen_set_eflag(flag);
+#else
ia64_setreg(_IA64_REG_AR_EFLAG, flag);
+#endif
regs->r1 = -1; /* disable syscall checks, r1 is
orig_eax */
}
===== arch/ia64/ia32/ia32_support.c 1.20 vs 1.21 =====
--- 1.20/arch/ia64/ia32/ia32_support.c Wed Oct 6 23:55:23 2004
+++ 1.21/arch/ia64/ia32/ia32_support.c Wed May 4 14:16:59 2005
@@ -100,7 +100,11 @@
void
ia32_save_state (struct task_struct *t)
{
+#ifdef CONFIG_XEN
+ t->thread.eflag = xen_get_eflag();
+#else
t->thread.eflag = ia64_getreg(_IA64_REG_AR_EFLAG);
+#endif
t->thread.fsr = ia64_getreg(_IA64_REG_AR_FSR);
t->thread.fcr = ia64_getreg(_IA64_REG_AR_FCR);
t->thread.fir = ia64_getreg(_IA64_REG_AR_FIR);
@@ -122,7 +126,11 @@
fdr = t->thread.fdr;
tssd = load_desc(_TSS); /* TSSD
*/
+#ifdef CONFIG_XEN
+ xen_set_eflag(eflag);
+#else
ia64_setreg(_IA64_REG_AR_EFLAG, eflag);
+#else
ia64_setreg(_IA64_REG_AR_FSR, fsr);
ia64_setreg(_IA64_REG_AR_FCR, fcr);
ia64_setreg(_IA64_REG_AR_FIR, fir);
===== arch/ia64/kernel/entry.S 1.80 vs 1.83 =====
--- 1.80/arch/ia64/kernel/entry.S Fri Jan 28 16:15:49 2005
+++ 1.83/arch/ia64/kernel/entry.S Wed May 4 14:16:59 2005
@@ -189,7 +189,13 @@
adds r22=IA64_TASK_THREAD_KSP_OFFSET,r13
movl r25=init_task
+#ifdef CONFIG_XEN
+ movl r27=XSI_KR0+(IA64_KR_CURRENT_STACK*8)
+ ;;
+ ld8 r27=[r27]
+#else
mov r27=IA64_KR(CURRENT_STACK)
+#endif
adds r21=IA64_TASK_THREAD_KSP_OFFSET,in0
dep r20=0,in0,61,3 // physical address of "next"
;;
@@ -204,11 +210,25 @@
(p6) br.cond.dpnt .map
;;
.done:
+#ifdef CONFIG_XEN
+ movl r27=XSI_PSR_IC
+ mov r8=1
+ ;;
+(p6) st4 [r27]=r8
+ ;;
+#else
(p6) ssm psr.ic // if we had to map, reenable
the psr.ic bit FIRST!!!
;;
(p6) srlz.d
+#endif
ld8 sp=[r21] // load kernel stack pointer of
new task
+#ifdef CONFIG_XEN
+ movl r8=XSI_KR0+(IA64_KR_CURRENT*8)
+ ;;
+ st8 [r8]=in0
+#else
mov IA64_KR(CURRENT)=in0 // update "current" application
register
+#endif
mov r8=r13 // return pointer to previously
running task
mov r13=in0 // set "current" pointer
;;
@@ -220,7 +240,13 @@
br.ret.sptk.many rp // boogie on out in new context
.map:
+#ifdef CONFIG_XEN
+ movl r27=XSI_PSR_IC
+ ;;
+ st4 [r27]=r0
+#else
rsm psr.ic // interrupts (psr.i) are
already disabled here
+#endif
movl r25=PAGE_KERNEL
;;
srlz.d
@@ -231,7 +257,13 @@
mov cr.ifa=in0 // VA of next task...
;;
mov r25=IA64_TR_CURRENT_STACK
+#ifdef CONFIG_XEN
+ movl r8=XSI_KR0+(IA64_KR_CURRENT_STACK*8)
+ ;;
+ st8 [r8]=r26
+#else
mov IA64_KR(CURRENT_STACK)=r26 // remember last page we
mapped...
+#endif
;;
itr.d dtr[r25]=r23 // wire in new mapping...
br.cond.sptk .done
@@ -693,7 +725,13 @@
;;
cmp.eq p6,p0=r21,r0 // p6 <- pUStk || (preempt_count
== 0)
#else /* !CONFIG_PREEMPT */
+#ifdef CONFIG_XEN
+ movl r2=XSI_PSR_I
+ ;;
+(pUStk) st4 [r2]=r0
+#else
(pUStk) rsm psr.i
+#endif
cmp.eq pLvSys,p0=r0,r0 // pLvSys=1: leave from syscall
(pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk
#endif
@@ -720,7 +758,14 @@
mov f6=f0 // clear f6
;;
invala // M0|1 invalidate ALAT
+#ifdef CONFIG_XEN
+ movl r29=XSI_PSR_IC
+ ;;
+ st8 [r29]=r0 // note: clears both vpsr.i and vpsr.ic!
+ ;;
+#else
rsm psr.i | psr.ic // M2 initiate turning off of interrupt
and interruption collection
+#endif
mov f9=f0 // clear f9
ld8 r29=[r2],16 // load cr.ipsr
@@ -809,7 +854,14 @@
;;
cmp.eq p6,p0=r21,r0 // p6 <- pUStk || (preempt_count
== 0)
#else
+#ifdef CONFIG_XEN
+(pUStk) movl r17=XSI_PSR_I
+ ;;
+(pUStk) st4 [r17]=r0
+ ;;
+#else
(pUStk) rsm psr.i
+#endif
cmp.eq p0,pLvSys=r0,r0 // pLvSys=0: leave from kernel
(pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk
#endif
@@ -857,7 +909,14 @@
mov ar.csd=r30
mov ar.ssd=r31
;;
+#ifdef CONFIG_XEN
+ movl r22=XSI_PSR_IC
+ ;;
+ st8 [r22]=r0 // note: clears both vpsr.i and vpsr.ic!
+ ;;
+#else
rsm psr.i | psr.ic // initiate turning off of interrupt and
interruption collection
+#endif
invala // invalidate ALAT
;;
ld8.fill r22=[r2],24
@@ -889,9 +948,48 @@
mov ar.ccv=r15
;;
ldf.fill f11=[r2]
+#ifdef CONFIG_XEN
+ ;;
+ // r16-r31 all now hold bank1 values
+ movl r2=XSI_BANK1_R16
+ movl r3=XSI_BANK1_R16+8
+ ;;
+ 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
+ ;;
+#else
bsw.0 // switch back to bank 0 (no stop bit
required beforehand...)
+#endif
;;
+#ifdef CONFIG_XEN
+(pUStk) movl r18=XSI_KR0+(IA64_KR_CURRENT*8)
+ ;;
+(pUStk) ld8 r18=[r18]
+ ;;
+#else
(pUStk) mov r18=IA64_KR(CURRENT)// M2 (12 cycle read latency)
+#endif
adds r16=PT(CR_IPSR)+16,r12
adds r17=PT(CR_IIP)+16,r12
@@ -947,7 +1045,11 @@
(pNonSys) br.cond.dpnt dont_preserve_current_frame
rbs_switch:
+#ifdef CONFIG_XEN
+ break.b 0x1fffff // this is a "privified" cover
+#else
cover // add current frame into dirty
partition and set cr.ifs
+#endif
;;
mov r19=ar.bsp // get new backing store pointer
sub r16=r16,r18 // krbs = old bsp - size of
dirty partition
@@ -1049,16 +1151,34 @@
(pKStk) dep r29=r22,r29,21,1 // I0 update ipsr.pp with psr.pp
(pLvSys)mov r16=r0 // A clear r16 for leave_syscall, no-op
otherwise
;;
+#ifdef CONFIG_XEN
+ movl r25=XSI_IPSR
+ ;;
+ st8[r25]=r29,XSI_IFS-XSI_IPSR
+ ;;
+#else
mov cr.ipsr=r29 // M2
+#endif
mov ar.pfs=r26 // I0
(pLvSys)mov r17=r0 // A clear r17 for leave_syscall, no-op
otherwise
+#ifdef CONFIG_XEN
+(p9) st8 [r25]=r30
+ ;;
+ adds r25=XSI_IIP-XSI_IFS,r25
+ ;;
+#else
(p9) mov cr.ifs=r30 // M2
+#endif
mov b0=r21 // I0
(pLvSys)mov r18=r0 // A clear r18 for leave_syscall, no-op
otherwise
mov ar.fpsr=r20 // M2
+#ifdef CONFIG_XEN
+ st8 [r25]=r28
+#else
mov cr.iip=r28 // M2
+#endif
nop 0
;;
(pUStk) mov ar.rnat=r24 // M2 must happen with RSE in
lazy mode
@@ -1067,6 +1187,23 @@
mov ar.rsc=r27 // M2
mov pr=r31,-1 // I0
+#ifdef CONFIG_XEN
+ ;;
+ /* FIXME: THIS CODE IS NOT NaT SAFE! */
+ movl r30=XSI_BANKNUM;
+ mov r31=1;;
+ st4 [r30]=r31;
+ movl r30=XSI_BANK1_R16;
+ movl r31=XSI_BANK1_R16+8;;
+ ld8 r16=[r30],16; ld8 r17=[r31],16;;
+ ld8 r18=[r30],16; ld8 r19=[r31],16;;
+ ld8 r20=[r30],16; ld8 r21=[r31],16;;
+ ld8 r22=[r30],16; ld8 r23=[r31],16;;
+ ld8 r24=[r30],16; ld8 r25=[r31],16;;
+ ld8 r26=[r30],16; ld8 r27=[r31],16;;
+ ld8 r28=[r30],16; ld8 r29=[r31],16;;
+ ld8 r30=[r30]; ld8 r31=[r31];;
+#endif
rfi // B
/*
@@ -1096,7 +1233,13 @@
#endif
br.call.spnt.many rp=schedule
.ret9: cmp.eq p6,p0=r0,r0 // p6 <- 1
+#ifdef CONFIG_XEN
+ movl r2=XSI_PSR_I
+ ;;
+ st4 [r2]=r0
+#else
rsm psr.i // disable interrupts
+#endif
;;
#ifdef CONFIG_PREEMPT
(pKStk) adds r20=TI_PRE_COUNT+IA64_TASK_SIZE,r13
@@ -1322,6 +1465,48 @@
mov rp=loc0
br.ret.sptk.many rp
END(unw_init_running)
+
+#ifdef CONFIG_XEN
+GLOBAL_ENTRY(xen_thash)
+ tak r8=r96 // this is a "privified" thash r8=r32
+ ;;
+ br.ret.sptk.many rp
+END(xen_thash)
+
+GLOBAL_ENTRY(xen_fc)
+ ptc.e r96 // this is a "privified" fc r32
+ ;;
+ br.ret.sptk.many rp
+END(xen_fc)
+
+GLOBAL_ENTRY(xen_get_cpuid)
+ mov r72=rr[r32] // this is a "privified" mov
r8=cpuid[r32]
+ ;;
+ br.ret.sptk.many rp
+END(xen_get_cpuid)
+
+GLOBAL_ENTRY(xen_get_pmd)
+ mov r72=pmc[r32] // this is a "privified" mov r8=pmd[r32]
+ ;;
+ br.ret.sptk.many rp
+END(xen_get_pmd)
+
+#ifdef CONFIG_IA32_SUPPORT
+GLOBAL_ENTRY(xen_get_eflag)
+ mov ar24=r72 // this is a "privified" mov r8=ar.eflg
+ ;;
+ br.ret.sptk.many rp
+END(xen_get_eflag)
+// some bits aren't set if pl!=0, see SDM vol1 3.1.8
+GLOBAL_ENTRY(xen_set_eflag)
+ mov ar24=r32
+ ;;
+ br.ret.sptk.many rp
+END(xen_get_eflag)
+#endif
+
+
+#endif
.rodata
.align 8
===== arch/ia64/kernel/ivt.S 1.31 vs 1.34 =====
--- 1.31/arch/ia64/kernel/ivt.S Wed Feb 2 16:06:25 2005
+++ 1.34/arch/ia64/kernel/ivt.S Wed May 4 14:16:59 2005
@@ -224,7 +224,13 @@
mov r29=b0 // save b0
mov r31=pr // save predicates
.itlb_fault:
+#ifdef CONFIG_XEN
+ movl r17=XSI_IHA
+ ;;
+ ld8 r17=[r17] // get virtual address
of L3 PTE
+#else
mov r17=cr.iha // get virtual address
of L3 PTE
+#endif
movl r30=1f // load nested fault
continuation point
;;
1: ld8 r18=[r17] // read L3 PTE
@@ -268,7 +274,13 @@
mov r29=b0 // save b0
mov r31=pr // save predicates
dtlb_fault:
+#ifdef CONFIG_XEN
+ movl r17=XSI_IHA
+ ;;
+ ld8 r17=[r17] // get virtual address
of L3 PTE
+#else
mov r17=cr.iha // get virtual address
of L3 PTE
+#endif
movl r30=1f // load nested fault
continuation point
;;
1: ld8 r18=[r17] // read L3 PTE
@@ -302,20 +314,33 @@
// 0x0c00 Entry 3 (size 64 bundles) Alt ITLB (19)
ENTRY(alt_itlb_miss)
DBG_FAULT(3)
+#ifdef CONFIG_XEN
+ ld8 r21=[r31],XSI_IFA-XSI_IPSR // get ipsr, point to ifa
+ movl r17=PAGE_KERNEL
+ ;;
+ movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
+ ;;
+ ld8 r16=[r31] // get ifa
+ mov r31=pr
+ ;;
+#else
mov r16=cr.ifa // get address that caused the TLB miss
movl r17=PAGE_KERNEL
mov r21=cr.ipsr
movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
mov r31=pr
;;
+#endif
#ifdef CONFIG_DISABLE_VHPT
shr.u r22=r16,61 // get the region number
into r21
;;
cmp.gt p8,p0=6,r22 // user mode
;;
+#ifndef CONFIG_XEN
(p8) thash r17=r16
;;
(p8) mov cr.iha=r17
+#endif
(p8) mov r29=b0 // save b0
(p8) br.cond.dptk .itlb_fault
#endif
@@ -340,6 +365,17 @@
// 0x1000 Entry 4 (size 64 bundles) Alt DTLB (7,46)
ENTRY(alt_dtlb_miss)
DBG_FAULT(4)
+#ifdef CONFIG_XEN
+ ld8 r21=[r31],XSI_ISR-XSI_IPSR // get ipsr, point to isr
+ movl r17=PAGE_KERNEL
+ ;;
+ ld8 r20=[r31],XSI_IFA-XSI_ISR // get isr, point to ifa
+ movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
+ ;;
+ ld8 r16=[r31] // get ifa
+ mov r31=pr
+ ;;
+#else
mov r16=cr.ifa // get address that caused the TLB miss
movl r17=PAGE_KERNEL
mov r20=cr.isr
@@ -347,14 +383,17 @@
mov r21=cr.ipsr
mov r31=pr
;;
+#endif
#ifdef CONFIG_DISABLE_VHPT
shr.u r22=r16,61 // get the region number
into r21
;;
cmp.gt p8,p0=6,r22 // access to region 0-5
;;
+#ifndef CONFIG_XEN
(p8) thash r17=r16
;;
(p8) mov cr.iha=r17
+#endif
(p8) mov r29=b0 // save b0
(p8) br.cond.dptk dtlb_fault
#endif
@@ -408,7 +447,13 @@
* Clobbered: b0, r18, r19, r21, psr.dt (cleared)
*/
rsm psr.dt // switch to using
physical data addressing
+#ifdef CONFIG_XEN
+ movl r19=XSI_KR0+(IA64_KR_PT_BASE*8) // get the page table
base address
+ ;;
+ ld8 r19=[r19]
+#else
mov r19=IA64_KR(PT_BASE) // get the page table
base address
+#endif
shl r21=r16,3 // shift bit 60 into
sign bit
;;
shr.u r17=r16,61 // get the region number
into r17
@@ -462,6 +507,19 @@
;;
SAVE_MIN_WITH_COVER
alloc r15=ar.pfs,0,0,3,0
+#ifdef CONFIG_XEN
+ movl r3=XSI_ISR
+ ;;
+ ld8 out1=[r3],XSI_IFA-XSI_ISR // get vcr.isr, point to
ifa
+ ;;
+ ld8 out0=[r3],XSI_PSR_IC-XSI_IFA // get vcr.ifa, point to
vpsr.ic
+ ;;
+ mov r14=1
+ ;;
+ st4 [r3]=r14 // vpsr.ic = 1
+ adds r3=8,r2 // set up second base
pointer
+ ;;
+#else
mov out0=cr.ifa
mov out1=cr.isr
adds r3=8,r2 // set up second base
pointer
@@ -470,7 +528,23 @@
;;
srlz.i // guarantee that
interruption collectin is on
;;
+#endif
+#ifdef CONFIG_XEN_XXX /* untested; overflows this IVT section */
+(p15) movl r3=XSI_PSR_I
+ ;;
+(p15) st4 [r3]=r14,XSI_PEND-XSI_PSR_I // if (p15) vpsr.i = 1
+ mov r14=r0
+ ;;
+(p15) ld4 r14=[r3] // if
(pending_interrupts)
+ ;;
+(p15) cmp.ne p15,p0=r14,r0
+ ;;
+(p15) ssm psr.i // do a real ssm psr.i
+ ;;
+ adds r3=8,r2 // set up second base
pointer
+#else
(p15) ssm psr.i // restore psr.i
+#endif
movl r14=ia64_leave_kernel
;;
SAVE_REST
@@ -505,7 +579,11 @@
mov r16=cr.ifa // get the address that
caused the fault
movl r30=1f // load continuation
point in case of nested fault
;;
+#ifdef CONFIG_XEN
+ tak r17=r80 // "privified" thash
+#else
thash r17=r16 // compute virtual
address of L3 PTE
+#endif
mov r29=b0 // save b0 in case of
nested fault
mov r31=pr // save pr
#ifdef CONFIG_SMP
@@ -571,7 +649,11 @@
(p6) mov r16=r18 // if so, use cr.iip
instead of cr.ifa
#endif /* CONFIG_ITANIUM */
;;
+#ifdef CONFIG_XEN
+ tak r17=r80 // "privified" thash
+#else
thash r17=r16 // compute virtual
address of L3 PTE
+#endif
mov r29=b0 // save b0 in case of
nested fault)
#ifdef CONFIG_SMP
mov r28=ar.ccv // save ar.ccv
@@ -624,7 +706,11 @@
mov r16=cr.ifa // get the address that
caused the fault
movl r30=1f // load continuation
point in case of nested fault
;;
+#ifdef CONFIG_XEN
+ tak r17=r80 // "privified" thash
+#else
thash r17=r16 // compute virtual
address of L3 PTE
+#endif
mov r31=pr
mov r29=b0 // save b0 in case of
nested fault)
#ifdef CONFIG_SMP
@@ -687,6 +773,23 @@
* to prevent leaking bits from kernel to user level.
*/
DBG_FAULT(11)
+#ifdef CONFIG_XEN
+ ld8 r29=[r31],XSI_IIP-XSI_IPSR // get ipsr, point to
iip
+ mov r18=__IA64_BREAK_SYSCALL
+ mov r21=ar.fpsr
+ ;;
+ ld8 r28=[r31],XSI_IIM-XSI_IIP // get iip, point to iim
+ mov r19=b6
+ mov r25=ar.unat
+ ;;
+ ld8 r17=[r31] // get iim
+ mov r27=ar.rsc
+ mov r26=ar.pfs
+ ;;
+ adds r31=(XSI_KR0+(IA64_KR_CURRENT*8))-XSI_IIM,r31
+ ;;
+ ld8 r16=[r31] // r16 = current task
+#else
mov r16=IA64_KR(CURRENT) // r16 = current task;
12 cycle read lat.
mov r17=cr.iim
mov r18=__IA64_BREAK_SYSCALL
@@ -697,6 +800,7 @@
mov r27=ar.rsc
mov r26=ar.pfs
mov r28=cr.iip
+#endif
mov r31=pr // prepare to save
predicates
mov r20=r1
;;
@@ -729,13 +833,36 @@
MINSTATE_START_SAVE_MIN_VIRT
br.call.sptk.many b7=ia64_syscall_setup
;;
+#ifdef CONFIG_XEN
+ mov r2=b0; br.call.sptk b0=xen_bsw1;; mov b0=r2;;
+#else
MINSTATE_END_SAVE_MIN_VIRT // switch to bank 1
+#endif
+#ifdef CONFIG_XEN
+ movl r3=XSI_PSR_IC
+ mov r16=1
+ ;;
+ st4 [r3]=r16,XSI_PSR_I-XSI_PSR_IC // vpsr.ic = 1
+ ;;
+(p15) st4 [r3]=r16,XSI_PEND-XSI_PSR_I // if (p15) vpsr.i = 1
+ mov r16=r0
+ ;;
+(p15) ld4 r16=[r3] // if
(pending_interrupts)
+ ;;
+ cmp.ne p6,p0=r16,r0
+ ;;
+(p6) ssm psr.i // do a real ssm psr.i
+ ;;
+ mov r3=NR_syscalls - 1
+ ;;
+#else
ssm psr.ic | PSR_DEFAULT_BITS
;;
srlz.i // guarantee that
interruption collection is on
mov r3=NR_syscalls - 1
;;
(p15) ssm psr.i // restore psr.i
+#endif
// p10==true means out registers are more than 8 or r15's Nat is
true
(p10) br.cond.spnt.many ia64_ret_from_syscall
;;
@@ -773,7 +900,14 @@
mov r31=pr // prepare to save predicates
;;
SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3
+#ifdef CONFIG_XEN
+ movl r3=XSI_PSR_IC
+ mov r14=1
+ ;;
+ st4 [r3]=r14
+#else
ssm psr.ic | PSR_DEFAULT_BITS
+#endif
;;
adds r3=8,r2 // set up second base pointer for
SAVE_REST
srlz.i // ensure everybody knows psr.ic is back
on
@@ -1521,6 +1655,32 @@
// 0x7e00 Entry 66 (size 16 bundles) Reserved
DBG_FAULT(66)
FAULT(66)
+
+#ifdef CONFIG_XEN
+ /*
+ * There is no particular reason for this code to be here, other
than that
+ * there happens to be space here that would go unused
otherwise. If this
+ * fault ever gets "unreserved", simply moved the following code
to a more
+ * suitable spot...
+ */
+
+GLOBAL_ENTRY(xen_bsw1)
+ /* FIXME: THIS CODE IS NOT NaT SAFE! */
+ movl r30=XSI_BANKNUM;
+ mov r31=1;;
+ st4 [r30]=r31;
+ movl r30=XSI_BANK1_R16;
+ movl r31=XSI_BANK1_R16+8;;
+ ld8 r16=[r30],16; ld8 r17=[r31],16;;
+ ld8 r18=[r30],16; ld8 r19=[r31],16;;
+ ld8 r20=[r30],16; ld8 r21=[r31],16;;
+ ld8 r22=[r30],16; ld8 r23=[r31],16;;
+ ld8 r24=[r30],16; ld8 r25=[r31],16;;
+ ld8 r26=[r30],16; ld8 r27=[r31],16;;
+ ld8 r28=[r30],16; ld8 r29=[r31],16;;
+ ld8 r30=[r30]; ld8 r31=[r31];;
+ br.ret.sptk.many b0
+#endif
.org ia64_ivt+0x7f00
////////////////////////////////////////////////////////////////////////
/////////////////
===== arch/ia64/kernel/minstate.h 1.19 vs 1.22 =====
--- 1.19/arch/ia64/kernel/minstate.h Wed Jan 26 11:01:31 2005
+++ 1.22/arch/ia64/kernel/minstate.h Wed May 4 14:16:59 2005
@@ -93,10 +93,122 @@
* p15 = TRUE if psr.i is set in cr.ipsr
* predicate registers (other than p2, p3, and p15), b6, r3, r14,
r15:
* preserved
+ * CONFIG_XEN note: p6/p7 are not preserved
*
* Note that psr.ic is NOT turned on by this macro. This is so that
* we can pass interruption state as arguments to a handler.
*/
+#ifdef CONFIG_XEN
+#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA)
\
+ /*MINSTATE_GET_CURRENT(r16); /* M (or M;;I) */
\
+ movl r16=XSI_KR0+(IA64_KR_CURRENT*8);;
\
+ ld8 r16=[r16];;
\
+ mov r27=ar.rsc; /* M */
\
+ mov r20=r1; /* A */
\
+ mov r25=ar.unat; /* M */
\
+ /* mov r29=cr.ipsr; /* M */
\
+ movl r29=XSI_IPSR;;
\
+ ld8 r29=[r29];;
\
+ mov r26=ar.pfs; /* I */
\
+ /* mov r28=cr.iip; /* M */
\
+ movl r28=XSI_IIP;;
\
+ ld8 r28=[r28];;
\
+ mov r21=ar.fpsr; /* M */
\
+ COVER; /* B;; (or nothing) */
\
+/* break.b 0x1fffff; /* "privified" cover instr */
\
+ ;;
\
+ adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16;
\
+ ;;
\
+ ld1 r17=[r16]; /* load
current->thread.on_ustack flag */ \
+ st1 [r16]=r0; /* clear
current->thread.on_ustack flag */ \
+ adds r1=-IA64_TASK_THREAD_ON_USTACK_OFFSET,r16
\
+ /* switch from user to kernel RBS: */
\
+ ;;
\
+ invala; /* M */
\
+ /* SAVE_IFS; /* see xen special handling below */
\
+ cmp.eq pKStk,pUStk=r0,r17; /* are we in kernel mode
already? */ \
+ ;;
\
+ MINSTATE_START_SAVE_MIN
\
+ adds r17=2*L1_CACHE_BYTES,r1; /* really: biggest
cache-line size */ \
+ adds r16=PT(CR_IPSR),r1;
\
+ ;;
\
+ lfetch.fault.excl.nt1 [r17],L1_CACHE_BYTES;
\
+ st8 [r16]=r29; /* save cr.ipsr */
\
+ ;;
\
+ lfetch.fault.excl.nt1 [r17];
\
+ tbit.nz p15,p0=r29,IA64_PSR_I_BIT;
\
+ mov r29=b0
\
+ ;;
\
+ adds r16=PT(R8),r1; /* initialize first base pointer */
\
+ adds r17=PT(R9),r1; /* initialize second base pointer */
\
+(pKStk) mov r18=r0; /* make sure r18 isn't NaT */
\
+ ;;
\
+.mem.offset 0,0; st8.spill [r16]=r8,16;
\
+.mem.offset 8,0; st8.spill [r17]=r9,16;
\
+ ;;
\
+.mem.offset 0,0; st8.spill [r16]=r10,24;
\
+.mem.offset 8,0; st8.spill [r17]=r11,24;
\
+ ;;
\
+ /* xen special handling for possibly lazy cover */
\
+ movl r8=XSI_INCOMPL_REGFR;
\
+ ;;
\
+ ld4 r30=[r8];
\
+ ;;
\
+ cmp.eq p6,p7=r30,r0;
\
+ ;; /* not sure if this stop bit is necessary */
\
+(p6) adds r8=XSI_PRECOVER_IFS-XSI_INCOMPL_REGFR,r8;
\
+(p7) adds r8=XSI_IFS-XSI_INCOMPL_REGFR,r8;
\
+ ;;
\
+ ld8 r30=[r8];
\
+ ;;
\
+ st8 [r16]=r28,16; /* save cr.iip */
\
+ st8 [r17]=r30,16; /* save cr.ifs */
\
+(pUStk) sub r18=r18,r22; /* r18=RSE.ndirty*8 */
\
+ mov r8=ar.ccv;
\
+ mov r9=ar.csd;
\
+ mov r10=ar.ssd;
\
+ movl r11=FPSR_DEFAULT; /* L-unit */
\
+ ;;
\
+ st8 [r16]=r25,16; /* save ar.unat */
\
+ st8 [r17]=r26,16; /* save ar.pfs */
\
+ shl r18=r18,16; /* compute ar.rsc to be used for
"loadrs" */ \
+ ;;
\
+ st8 [r16]=r27,16; /* save ar.rsc */
\
+(pUStk) st8 [r17]=r24,16; /* save ar.rnat */
\
+(pKStk) adds r17=16,r17; /* skip over ar_rnat field */
\
+ ;; /* avoid RAW on r16 & r17 */
\
+(pUStk) st8 [r16]=r23,16; /* save ar.bspstore */
\
+ st8 [r17]=r31,16; /* save predicates */
\
+(pKStk) adds r16=16,r16; /* skip over ar_bspstore field
*/ \
+ ;;
\
+ st8 [r16]=r29,16; /* save b0 */
\
+ st8 [r17]=r18,16; /* save ar.rsc value for "loadrs" */
\
+ cmp.eq pNonSys,pSys=r0,r0 /* initialize pSys=0, pNonSys=1
*/ \
+ ;;
\
+.mem.offset 0,0; st8.spill [r16]=r20,16; /* save original r1 */
\
+.mem.offset 8,0; st8.spill [r17]=r12,16;
\
+ adds r12=-16,r1; /* switch to kernel memory stack (with
16 bytes of scratch) */ \
+ ;;
\
+.mem.offset 0,0; st8.spill [r16]=r13,16;
\
+.mem.offset 8,0; st8.spill [r17]=r21,16; /* save ar.fpsr */
\
+ /* mov r13=IA64_KR(CURRENT); /* establish `current' */
\
+ movl r21=XSI_KR0+(IA64_KR_CURRENT*8);;
\
+ ld8 r13=[r21];;
\
+ ;;
\
+.mem.offset 0,0; st8.spill [r16]=r15,16;
\
+.mem.offset 8,0; st8.spill [r17]=r14,16;
\
+ ;;
\
+.mem.offset 0,0; st8.spill [r16]=r2,16;
\
+.mem.offset 8,0; st8.spill [r17]=r3,16;
\
+ ;;
\
+ EXTRA;
\
+ mov r2=b0; br.call.sptk b0=xen_bsw1;; mov b0=r2;
\
+ adds r2=IA64_PT_REGS_R16_OFFSET,r1;
\
+ ;;
\
+ movl r1=__gp; /* establish kernel global pointer */
\
+ ;;
\
+ /* MINSTATE_END_SAVE_MIN */
+#else
#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA)
\
MINSTATE_GET_CURRENT(r16); /* M (or M;;I) */
\
mov r27=ar.rsc; /* M */
\
@@ -183,6 +295,7 @@
movl r1=__gp; /* establish kernel global pointer */
\
;;
\
MINSTATE_END_SAVE_MIN
+#endif
/*
* SAVE_REST saves the remainder of pt_regs (with psr.ic on).
@@ -248,4 +361,8 @@
#define SAVE_MIN_WITH_COVER DO_SAVE_MIN(cover, mov r30=cr.ifs,)
#define SAVE_MIN_WITH_COVER_R19 DO_SAVE_MIN(cover, mov
r30=cr.ifs, mov r15=r19)
+#ifdef CONFIG_XEN
+#define SAVE_MIN break 0;; /* FIXME: non-cover version
only for ia32 support? */
+#else
#define SAVE_MIN DO_SAVE_MIN( , mov r30=r0, )
+#endif
===== arch/ia64/kernel/pal.S 1.10 vs 1.12 =====
--- 1.10/arch/ia64/kernel/pal.S Fri Jul 2 05:27:05 2004
+++ 1.12/arch/ia64/kernel/pal.S Tue Apr 26 17:11:17 2005
@@ -74,6 +74,21 @@
.body
mov r30 = in2
+#ifdef CONFIG_XEN
+ // this is low priority for paravirtualization, but is called
+ // from the idle loop so confuses privop counting
+ movl r31=XSI_PSR_IC
+ ;;
+(p6) st8 [r31]=r0
+ ;;
+(p7) adds r31=XSI_PSR_I-XSI_PSR_IC,r31
+ ;;
+(p7) st4 [r31]=r0
+ ;;
+ mov r31 = in3
+ mov b7 = loc2
+ ;;
+#else
(p6) rsm psr.i | psr.ic
mov r31 = in3
mov b7 = loc2
@@ -81,6 +96,7 @@
(p7) rsm psr.i
;;
(p6) srlz.i
+#endif
mov rp = r8
br.cond.sptk.many b7
1: mov psr.l = loc3
===== arch/ia64/kernel/setup.c 1.86 vs edited =====
--- 1.86/arch/ia64/kernel/setup.c Wed Feb 2 13:21:27 2005
+++ edited/arch/ia64/kernel/setup.c Wed May 4 11:16:45 2005
@@ -270,6 +270,11 @@
static inline int __init
early_console_setup (char *cmdline)
{
+#ifdef CONFIG_XEN
+ extern struct console hpsim_cons;
+ register_console(&hpsim_cons);
+ return 0;
+#else
#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
{
extern int sn_serial_console_early_setup(void);
@@ -287,6 +292,7 @@
#endif
return -1;
+#endif
}
static inline void
===== drivers/acpi/motherboard.c 1.6 vs 1.7 =====
--- 1.6/drivers/acpi/motherboard.c Wed Nov 10 15:57:35 2004
+++ 1.7/drivers/acpi/motherboard.c Fri Apr 22 16:47:41 2005
@@ -120,6 +120,9 @@
static void __init
acpi_reserve_resources (void)
{
+#ifdef CONFIG_XEN
+ if (!acpi_gbl_FADT) return;
+#endif
if (acpi_gbl_FADT->xpm1a_evt_blk.address &&
acpi_gbl_FADT->pm1_evt_len)
request_region(acpi_gbl_FADT->xpm1a_evt_blk.address,
acpi_gbl_FADT->pm1_evt_len, "PM1a_EVT_BLK");
===== include/asm-ia64/ia32.h 1.31 vs 1.32 =====
--- 1.31/include/asm-ia64/ia32.h Wed Oct 6 23:59:48 2004
+++ 1.32/include/asm-ia64/ia32.h Wed May 4 14:16:59 2005
@@ -19,6 +19,10 @@
extern int ia32_exception (struct pt_regs *regs, unsigned long isr);
extern int ia32_intercept (struct pt_regs *regs, unsigned long isr);
extern int ia32_clone_tls (struct task_struct *child, struct pt_regs
*childregs);
+#ifdef CONFIG_XEN
+extern unsigned long xen_get_eflag(void);
+extern void xen_set_eflag(unsigned long);
+#endif
# endif /* !CONFIG_IA32_SUPPORT */
===== include/asm-ia64/processor.h 1.72 vs 1.75 =====
--- 1.72/include/asm-ia64/processor.h Wed Jan 26 11:01:41 2005
+++ 1.75/include/asm-ia64/processor.h Wed May 4 14:16:59 2005
@@ -695,4 +695,80 @@
#endif /* !__ASSEMBLY__ */
+#ifdef CONFIG_XEN
+
+/* Xen shared-info base and offsets */
+#define XSI_BASE 0xf100000000000000
+/* derived from xen/include/public/arch-ia64.h arch_vcpu_info_t */
+#define XSI_IPSR_OFS 0x08
+#define XSI_IIP_OFS 0x10
+#define XSI_IFS_OFS 0x18
+#define XSI_PRECOVER_IFS_OFS 0x20
+#define XSI_ISR_OFS 0x28
+#define XSI_IFA_OFS 0x30
+#define XSI_IIPA_OFS 0x38
+#define XSI_IIM_OFS 0x40
+#define XSI_TPR_OFS 0x50
+#define XSI_IHA_OFS 0x58
+#define XSI_PSR_IC_OFS 0x88
+#define XSI_PSR_I_OFS 0x8c
+#define XSI_PEND_OFS 0x90
+#define XSI_INCOMPL_REGFR_OFS 0x94
+#define XSI_DELIV_MASK0_OFS 0x98
+#define XSI_METAPHYS_OFS 0xb8
+#define XSI_BANKNUM_OFS 0xbc
+#define XSI_BANK0_R16_OFS 0xc0
+#define XSI_BANK1_R16_OFS 0x140
+#define XSI_RR0_OFS 0x1c0
+#define XSI_KR0_OFS 0x200
+
+#define XSI_IPSR (XSI_BASE+XSI_IPSR_OFS)
+#define XSI_IIP (XSI_BASE+XSI_IIP_OFS)
+#define XSI_IFS (XSI_BASE+XSI_IFS_OFS)
+#define XSI_PRECOVER_IFS
(XSI_BASE+XSI_PRECOVER_IFS_OFS)
+#define XSI_ISR (XSI_BASE+XSI_ISR_OFS)
+#define XSI_IFA (XSI_BASE+XSI_IFA_OFS)
+#define XSI_IIPA (XSI_BASE+XSI_IIPA_OFS)
+#define XSI_IIM (XSI_BASE+XSI_IIM_OFS)
+#define XSI_TPR (XSI_BASE+XSI_TPR_OFS)
+#define XSI_IHA (XSI_BASE+XSI_IHA_OFS)
+#define XSI_PSR_IC
(XSI_BASE+XSI_PSR_IC_OFS)
+#define XSI_PSR_I (XSI_BASE+XSI_PSR_I_OFS)
+#define XSI_PEND (XSI_BASE+XSI_PEND_OFS)
+#define XSI_INCOMPL_REGFR
(XSI_BASE+XSI_INCOMPL_REGFR_OFS)
+#define XSI_DELIV_MASK0
(XSI_BASE+XSI_DELIV_MASK0_OFS)
+#define XSI_METAPHYS
(XSI_BASE+XSI_METAPHYS_OFS)
+#define XSI_BANKNUM
(XSI_BASE+XSI_BANKNUM_OFS)
+#define XSI_BANK0_R16
(XSI_BASE+XSI_BANK0_R16_OFS)
+#define XSI_BANK1_R16
(XSI_BASE+XSI_BANK1_R16_OFS)
+#define XSI_RR0 (XSI_BASE+XSI_RR0_OFS)
+#define XSI_KR0 (XSI_BASE+XSI_KR0_OFS)
+
+#ifndef __ASSEMBLY__
+#undef ia64_get_kr
+#define ia64_get_kr(regnum) \
+({ \
+ ((unsigned long *)(XSI_KR0))[regnum]; \
+})
+
+#undef ia64_thash
+extern unsigned long xen_thash(unsigned long addr);
+#define ia64_thash(addr) xen_thash(addr)
+
+#undef ia64_fc
+extern void xen_fc(unsigned long addr);
+#define ia64_fc(addr) xen_fc(addr)
+
+#undef ia64_get_cpuid
+extern unsigned long xen_get_cpuid(int index);
+#define ia64_get_cpuid(i) xen_get_cpuid(i)
+
+#undef ia64_get_pmd
+extern unsigned long xen_get_pmd(int index);
+#define ia64_get_pmd(i) xen_get_pmd(i)
+
+/* FIXME: may need to redefine ia64_set/is_local_fpu_owner(t) */
+#endif /* !__ASSEMBLY__ */
+#endif /* CONFIG_XEN */
+
#endif /* _ASM_IA64_PROCESSOR_H */
===== include/asm-ia64/system.h 1.48 vs 1.49 =====
--- 1.48/include/asm-ia64/system.h Tue Jan 4 19:48:18 2005
+++ 1.49/include/asm-ia64/system.h Fri Apr 22 16:52:51 2005
@@ -181,6 +181,64 @@
(__ia64_id_flags & IA64_PSR_I) == 0; \
})
+
+#ifdef CONFIG_XEN
+
+#include <asm/processor.h>
+
+#define ia64_rsm_psr_i() \
+do { \
+ *(int *)(XSI_PSR_I) = 0; \
+} while (0)
+
+#define ia64_ssm_psr_i() \
+do { \
+ int old = *(int *)(XSI_PSR_I); \
+ *(int *)(XSI_PSR_I) = 1; \
+ if (!old && *(int *)(XSI_PEND)) \
+ ia64_ssm(IA64_PSR_I); \
+} while (0)
+
+#undef local_irq_enable
+#define local_irq_enable() ia64_ssm_psr_i()
+
+# undef __local_irq_save
+#define __local_irq_save(x) \
+do { \
+ (x) = *(int *)(XSI_PSR_I) ? \
+ IA64_PSR_I : 0; \
+ ia64_rsm_psr_i(); \
+} while (0)
+
+#undef __local_irq_disable
+#define __local_irq_disable() \
+do { \
+ ia64_rsm_psr_i(); \
+} while (0)
+
+#undef __local_irq_restore
+#define __local_irq_restore(x) \
+do { \
+ if (x & IA64_PSR_I) ia64_ssm_psr_i(); \
+ else ia64_rsm_psr_i(); \
+} while (0)
+
+#undef local_save_flags
+#define local_save_flags(flags) \
+do { \
+ (flags) = *(int *)(XSI_PSR_I) ? \
+ IA64_PSR_I : 0; \
+} while (0)
+
+#undef local_irq_save
+#undef local_irq_disable
+#undef local_irq_restore
+# define local_irq_save(x) __local_irq_save(x)
+# define local_irq_disable() __local_irq_disable()
+# define local_irq_restore(x) __local_irq_restore(x)
+
+#endif
+
#ifdef __KERNEL__
#define prepare_to_switch() do { } while(0)
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