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linux/arch/ia64/kvm/vmm_ivt.S
Tony Luck c0b5a64d93 [IA64] Change default PSR.ac from '1' to '0' (Fix erratum #237) 
April 2014 Itanium processor specification update:

http://www.intel.com/content/www/us/en/processors/itanium/itanium-specification-update.html

describes this erratum:

=========================================================================
237. Under a complex set of conditions, store to load forwarding for a
sub 8-byte load may complete incorrectly

Problem: A load instruction may complete incorrectly when a code sequence
using 4-byte or smaller load and store operations to the same address
is executed in combination with specific timing of all the following
concurrent conditions: store to load forwarding, alignment checking
enabled, a mis-predicted branch, and complex cache utilization activity.

Implication: The affected sub 8-byte instruction may complete
incorrectly resulting in unpredictable system behavior. There is an
extremely low probability of exposure due to the significant number of
complex microarchitectural concurrent conditions required to encounter
the erratum.

Workaround: Set PSR.ac = 0 to completely avoid the erratum. Disabling
Hyper-Threading will significantly reduce exposure to the conditions
that contribute to encountering the erratum.

Status: See the Summary Table of Changes for the affected steppings.
=========================================================================

[Table of changes essentially lists all models from McKinley to Tukwila]

The PSR.ac bit controls whether the processor will always generate
an unaligned reference trap (0x5a00) for a misaligned data access
(when PSR.ac=1) or if it will let the access succeed when running
on a cpu that implements logic to handle some unaligned accesses.

Way back in 2008 in commit b704882e70
  [IA64] Rationalize kernel mode alignment checking
we made the decision to always enable strict checking. We were
already doing so in trap/interrupt context because the common
preamble code set this bit - but the rest of supervisor code
(and by inheritance user code) ran with PSR.ac=0.

We now reverse that decision and set PSR.ac=0 everywhere in the
kernel (also inherited by user processes). This will avoid the
erratum using the method described in the Itanium specification
update.  Net effect for users is that the processor will handle
unaligned access when it can (typically with a tiny performance
bubble in the pipeline ... but much less invasive than taking a
trap and having the OS perform the access).

Signed-off-by: Tony Luck <tony.luck@intel.com>
2014-04-16 10:20:34 -07:00

1393 lines
34 KiB
ArmAsm
Raw Blame History

/*
* arch/ia64/kvm/vmm_ivt.S
*
* Copyright (C) 1998-2001, 2003 Hewlett-Packard Co
* Stephane Eranian <eranian@hpl.hp.com>
* David Mosberger <davidm@hpl.hp.com>
* Copyright (C) 2000, 2002-2003 Intel Co
* Asit Mallick <asit.k.mallick@intel.com>
* Suresh Siddha <suresh.b.siddha@intel.com>
* Kenneth Chen <kenneth.w.chen@intel.com>
* Fenghua Yu <fenghua.yu@intel.com>
*
*
* 00/08/23 Asit Mallick <asit.k.mallick@intel.com> TLB handling
* for SMP
* 00/12/20 David Mosberger-Tang <davidm@hpl.hp.com> DTLB/ITLB
* handler now uses virtual PT.
*
* 07/6/20 Xuefei Xu (Anthony Xu) (anthony.xu@intel.com)
* Supporting Intel virtualization architecture
*
*/
/*
* This file defines the interruption vector table used by the CPU.
* It does not include one entry per possible cause of interruption.
*
* The first 20 entries of the table contain 64 bundles each while the
* remaining 48 entries contain only 16 bundles each.
*
* The 64 bundles are used to allow inlining the whole handler for
* critical
* interruptions like TLB misses.
*
* For each entry, the comment is as follows:
*
* // 0x1c00 Entry 7 (size 64 bundles) Data Key Miss
* (12,51)
* entry offset ----/ / / /
* /
* entry number ---------/ / /
* /
* size of the entry -------------/ /
* /
* vector name -------------------------------------/
* /
* interruptions triggering this vector
* ----------------------/
*
* The table is 32KB in size and must be aligned on 32KB
* boundary.
* (The CPU ignores the 15 lower bits of the address)
*
* Table is based upon EAS2.6 (Oct 1999)
*/
#include <asm/asmmacro.h>
#include <asm/cache.h>
#include <asm/pgtable.h>
#include "asm-offsets.h"
#include "vcpu.h"
#include "kvm_minstate.h"
#include "vti.h"
#if 0
# define PSR_DEFAULT_BITS psr.ac
#else
# define PSR_DEFAULT_BITS 0
#endif
#define KVM_FAULT(n) \
kvm_fault_##n:; \
mov r19=n;; \
br.sptk.many kvm_vmm_panic; \
;; \
#define KVM_REFLECT(n) \
mov r31=pr; \
mov r19=n; /* prepare to save predicates */ \
mov r29=cr.ipsr; \
;; \
tbit.z p6,p7=r29,IA64_PSR_VM_BIT; \
(p7) br.sptk.many kvm_dispatch_reflection; \
br.sptk.many kvm_vmm_panic; \
GLOBAL_ENTRY(kvm_vmm_panic)
KVM_SAVE_MIN_WITH_COVER_R19
alloc r14=ar.pfs,0,0,1,0
mov out0=r15
adds r3=8,r2 // set up second base pointer
;;
ssm psr.ic
;;
srlz.i // guarantee that interruption collection is on
;;
(p15) ssm psr.i // restore psr.
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
mov rp=r14
;;
br.call.sptk.many b6=vmm_panic_handler;
END(kvm_vmm_panic)
.section .text..ivt,"ax"
.align 32768 // align on 32KB boundary
.global kvm_ia64_ivt
kvm_ia64_ivt:
///////////////////////////////////////////////////////////////
// 0x0000 Entry 0 (size 64 bundles) VHPT Translation (8,20,47)
ENTRY(kvm_vhpt_miss)
KVM_FAULT(0)
END(kvm_vhpt_miss)
.org kvm_ia64_ivt+0x400
////////////////////////////////////////////////////////////////
// 0x0400 Entry 1 (size 64 bundles) ITLB (21)
ENTRY(kvm_itlb_miss)
mov r31 = pr
mov r29=cr.ipsr;
;;
tbit.z p6,p7=r29,IA64_PSR_VM_BIT;
(p6) br.sptk kvm_alt_itlb_miss
mov r19 = 1
br.sptk kvm_itlb_miss_dispatch
KVM_FAULT(1);
END(kvm_itlb_miss)
.org kvm_ia64_ivt+0x0800
//////////////////////////////////////////////////////////////////
// 0x0800 Entry 2 (size 64 bundles) DTLB (9,48)
ENTRY(kvm_dtlb_miss)
mov r31 = pr
mov r29=cr.ipsr;
;;
tbit.z p6,p7=r29,IA64_PSR_VM_BIT;
(p6) br.sptk kvm_alt_dtlb_miss
br.sptk kvm_dtlb_miss_dispatch
END(kvm_dtlb_miss)
.org kvm_ia64_ivt+0x0c00
////////////////////////////////////////////////////////////////////
// 0x0c00 Entry 3 (size 64 bundles) Alt ITLB (19)
ENTRY(kvm_alt_itlb_miss)
mov r16=cr.ifa // get address that caused the TLB miss
;;
movl r17=PAGE_KERNEL
mov r24=cr.ipsr
movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
;;
and r19=r19,r16 // clear ed, reserved bits, and PTE control bits
;;
or r19=r17,r19 // insert PTE control bits into r19
;;
movl r20=IA64_GRANULE_SHIFT<<2
;;
mov cr.itir=r20
;;
itc.i r19 // insert the TLB entry
mov pr=r31,-1
rfi
END(kvm_alt_itlb_miss)
.org kvm_ia64_ivt+0x1000
/////////////////////////////////////////////////////////////////////
// 0x1000 Entry 4 (size 64 bundles) Alt DTLB (7,46)
ENTRY(kvm_alt_dtlb_miss)
mov r16=cr.ifa // get address that caused the TLB miss
;;
movl r17=PAGE_KERNEL
movl r19=(((1 << IA64_MAX_PHYS_BITS) - 1) & ~0xfff)
mov r24=cr.ipsr
;;
and r19=r19,r16 // clear ed, reserved bits, and PTE control bits
;;
or r19=r19,r17 // insert PTE control bits into r19
;;
movl r20=IA64_GRANULE_SHIFT<<2
;;
mov cr.itir=r20
;;
itc.d r19 // insert the TLB entry
mov pr=r31,-1
rfi
END(kvm_alt_dtlb_miss)
.org kvm_ia64_ivt+0x1400
//////////////////////////////////////////////////////////////////////
// 0x1400 Entry 5 (size 64 bundles) Data nested TLB (6,45)
ENTRY(kvm_nested_dtlb_miss)
KVM_FAULT(5)
END(kvm_nested_dtlb_miss)
.org kvm_ia64_ivt+0x1800
/////////////////////////////////////////////////////////////////////
// 0x1800 Entry 6 (size 64 bundles) Instruction Key Miss (24)
ENTRY(kvm_ikey_miss)
KVM_REFLECT(6)
END(kvm_ikey_miss)
.org kvm_ia64_ivt+0x1c00
/////////////////////////////////////////////////////////////////////
// 0x1c00 Entry 7 (size 64 bundles) Data Key Miss (12,51)
ENTRY(kvm_dkey_miss)
KVM_REFLECT(7)
END(kvm_dkey_miss)
.org kvm_ia64_ivt+0x2000
////////////////////////////////////////////////////////////////////
// 0x2000 Entry 8 (size 64 bundles) Dirty-bit (54)
ENTRY(kvm_dirty_bit)
KVM_REFLECT(8)
END(kvm_dirty_bit)
.org kvm_ia64_ivt+0x2400
////////////////////////////////////////////////////////////////////
// 0x2400 Entry 9 (size 64 bundles) Instruction Access-bit (27)
ENTRY(kvm_iaccess_bit)
KVM_REFLECT(9)
END(kvm_iaccess_bit)
.org kvm_ia64_ivt+0x2800
///////////////////////////////////////////////////////////////////
// 0x2800 Entry 10 (size 64 bundles) Data Access-bit (15,55)
ENTRY(kvm_daccess_bit)
KVM_REFLECT(10)
END(kvm_daccess_bit)
.org kvm_ia64_ivt+0x2c00
/////////////////////////////////////////////////////////////////
// 0x2c00 Entry 11 (size 64 bundles) Break instruction (33)
ENTRY(kvm_break_fault)
mov r31=pr
mov r19=11
mov r29=cr.ipsr
;;
KVM_SAVE_MIN_WITH_COVER_R19
;;
alloc r14=ar.pfs,0,0,4,0 //(must be first in insn group!)
mov out0=cr.ifa
mov out2=cr.isr // FIXME: pity to make this slow access twice
mov out3=cr.iim // FIXME: pity to make this slow access twice
adds r3=8,r2 // set up second base pointer
;;
ssm psr.ic
;;
srlz.i // guarantee that interruption collection is on
;;
(p15)ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
mov rp=r14
;;
adds out1=16,sp
br.call.sptk.many b6=kvm_ia64_handle_break
;;
END(kvm_break_fault)
.org kvm_ia64_ivt+0x3000
/////////////////////////////////////////////////////////////////
// 0x3000 Entry 12 (size 64 bundles) External Interrupt (4)
ENTRY(kvm_interrupt)
mov r31=pr // prepare to save predicates
mov r19=12
mov r29=cr.ipsr
;;
tbit.z p6,p7=r29,IA64_PSR_VM_BIT
tbit.z p0,p15=r29,IA64_PSR_I_BIT
;;
(p7) br.sptk kvm_dispatch_interrupt
;;
mov r27=ar.rsc /* M */
mov r20=r1 /* A */
mov r25=ar.unat /* M */
mov r26=ar.pfs /* I */
mov r28=cr.iip /* M */
cover /* B (or nothing) */
;;
mov r1=sp
;;
invala /* M */
mov r30=cr.ifs
;;
addl r1=-VMM_PT_REGS_SIZE,r1
;;
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]
mov r29=b0
;;
adds r16=PT(R8),r1 /* initialize first base pointer */
adds r17=PT(R9),r1 /* initialize second base pointer */
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
;;
st8 [r16]=r28,16 /* save cr.iip */
st8 [r17]=r30,16 /* save cr.ifs */
mov r8=ar.fpsr /* M */
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 */
adds r17=16,r17 /* skip over ar_rnat field */
;;
st8 [r17]=r31,16 /* save predicates */
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" */
;;
.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]=r8,16 /* save ar.fpsr */
;;
.mem.offset 0,0; st8.spill [r16]=r15,16
.mem.offset 8,0; st8.spill [r17]=r14,16
dep r14=-1,r0,60,4
;;
.mem.offset 0,0; st8.spill [r16]=r2,16
.mem.offset 8,0; st8.spill [r17]=r3,16
adds r2=VMM_PT_REGS_R16_OFFSET,r1
adds r14 = VMM_VCPU_GP_OFFSET,r13
;;
mov r8=ar.ccv
ld8 r14 = [r14]
;;
mov r1=r14 /* establish kernel global pointer */
;; \
bsw.1
;;
alloc r14=ar.pfs,0,0,1,0 // must be first in an insn group
mov out0=r13
;;
ssm psr.ic
;;
srlz.i
;;
//(p15) ssm psr.i
adds r3=8,r2 // set up second base pointer for SAVE_REST
srlz.i // ensure everybody knows psr.ic is back on
;;
.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
mov r18=b6
;;
.mem.offset 0,0; st8.spill [r2]=r22,16
.mem.offset 8,0; st8.spill [r3]=r23,16
mov r19=b7
;;
.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]=r31,32
;;
mov ar.fpsr=r11 /* M-unit */
st8 [r2]=r8,8 /* ar.ccv */
adds r24=PT(B6)-PT(F7),r3
;;
stf.spill [r2]=f6,32
stf.spill [r3]=f7,32
;;
stf.spill [r2]=f8,32
stf.spill [r3]=f9,32
;;
stf.spill [r2]=f10
stf.spill [r3]=f11
adds r25=PT(B7)-PT(F11),r3
;;
st8 [r24]=r18,16 /* b6 */
st8 [r25]=r19,16 /* b7 */
;;
st8 [r24]=r9 /* ar.csd */
st8 [r25]=r10 /* ar.ssd */
;;
srlz.d // make sure we see the effect of cr.ivr
addl r14=@gprel(ia64_leave_nested),gp
;;
mov rp=r14
br.call.sptk.many b6=kvm_ia64_handle_irq
;;
END(kvm_interrupt)
.global kvm_dispatch_vexirq
.org kvm_ia64_ivt+0x3400
//////////////////////////////////////////////////////////////////////
// 0x3400 Entry 13 (size 64 bundles) Reserved
ENTRY(kvm_virtual_exirq)
mov r31=pr
mov r19=13
mov r30 =r0
;;
kvm_dispatch_vexirq:
cmp.eq p6,p0 = 1,r30
;;
(p6) add r29 = VMM_VCPU_SAVED_GP_OFFSET,r21
;;
(p6) ld8 r1 = [r29]
;;
KVM_SAVE_MIN_WITH_COVER_R19
alloc r14=ar.pfs,0,0,1,0
mov out0=r13
ssm psr.ic
;;
srlz.i // guarantee that interruption collection is on
;;
(p15) ssm psr.i // restore psr.i
adds r3=8,r2 // set up second base pointer
;;
KVM_SAVE_REST
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
mov rp=r14
br.call.sptk.many b6=kvm_vexirq
END(kvm_virtual_exirq)
.org kvm_ia64_ivt+0x3800
/////////////////////////////////////////////////////////////////////
// 0x3800 Entry 14 (size 64 bundles) Reserved
KVM_FAULT(14)
// this code segment is from 2.6.16.13
.org kvm_ia64_ivt+0x3c00
///////////////////////////////////////////////////////////////////////
// 0x3c00 Entry 15 (size 64 bundles) Reserved
KVM_FAULT(15)
.org kvm_ia64_ivt+0x4000
///////////////////////////////////////////////////////////////////////
// 0x4000 Entry 16 (size 64 bundles) Reserved
KVM_FAULT(16)
.org kvm_ia64_ivt+0x4400
//////////////////////////////////////////////////////////////////////
// 0x4400 Entry 17 (size 64 bundles) Reserved
KVM_FAULT(17)
.org kvm_ia64_ivt+0x4800
//////////////////////////////////////////////////////////////////////
// 0x4800 Entry 18 (size 64 bundles) Reserved
KVM_FAULT(18)
.org kvm_ia64_ivt+0x4c00
//////////////////////////////////////////////////////////////////////
// 0x4c00 Entry 19 (size 64 bundles) Reserved
KVM_FAULT(19)
.org kvm_ia64_ivt+0x5000
//////////////////////////////////////////////////////////////////////
// 0x5000 Entry 20 (size 16 bundles) Page Not Present
ENTRY(kvm_page_not_present)
KVM_REFLECT(20)
END(kvm_page_not_present)
.org kvm_ia64_ivt+0x5100
///////////////////////////////////////////////////////////////////////
// 0x5100 Entry 21 (size 16 bundles) Key Permission vector
ENTRY(kvm_key_permission)
KVM_REFLECT(21)
END(kvm_key_permission)
.org kvm_ia64_ivt+0x5200
//////////////////////////////////////////////////////////////////////
// 0x5200 Entry 22 (size 16 bundles) Instruction Access Rights (26)
ENTRY(kvm_iaccess_rights)
KVM_REFLECT(22)
END(kvm_iaccess_rights)
.org kvm_ia64_ivt+0x5300
//////////////////////////////////////////////////////////////////////
// 0x5300 Entry 23 (size 16 bundles) Data Access Rights (14,53)
ENTRY(kvm_daccess_rights)
KVM_REFLECT(23)
END(kvm_daccess_rights)
.org kvm_ia64_ivt+0x5400
/////////////////////////////////////////////////////////////////////
// 0x5400 Entry 24 (size 16 bundles) General Exception (5,32,34,36,38,39)
ENTRY(kvm_general_exception)
KVM_REFLECT(24)
KVM_FAULT(24)
END(kvm_general_exception)
.org kvm_ia64_ivt+0x5500
//////////////////////////////////////////////////////////////////////
// 0x5500 Entry 25 (size 16 bundles) Disabled FP-Register (35)
ENTRY(kvm_disabled_fp_reg)
KVM_REFLECT(25)
END(kvm_disabled_fp_reg)
.org kvm_ia64_ivt+0x5600
////////////////////////////////////////////////////////////////////
// 0x5600 Entry 26 (size 16 bundles) Nat Consumption (11,23,37,50)
ENTRY(kvm_nat_consumption)
KVM_REFLECT(26)
END(kvm_nat_consumption)
.org kvm_ia64_ivt+0x5700
/////////////////////////////////////////////////////////////////////
// 0x5700 Entry 27 (size 16 bundles) Speculation (40)
ENTRY(kvm_speculation_vector)
KVM_REFLECT(27)
END(kvm_speculation_vector)
.org kvm_ia64_ivt+0x5800
/////////////////////////////////////////////////////////////////////
// 0x5800 Entry 28 (size 16 bundles) Reserved
KVM_FAULT(28)
.org kvm_ia64_ivt+0x5900
///////////////////////////////////////////////////////////////////
// 0x5900 Entry 29 (size 16 bundles) Debug (16,28,56)
ENTRY(kvm_debug_vector)
KVM_FAULT(29)
END(kvm_debug_vector)
.org kvm_ia64_ivt+0x5a00
///////////////////////////////////////////////////////////////
// 0x5a00 Entry 30 (size 16 bundles) Unaligned Reference (57)
ENTRY(kvm_unaligned_access)
KVM_REFLECT(30)
END(kvm_unaligned_access)
.org kvm_ia64_ivt+0x5b00
//////////////////////////////////////////////////////////////////////
// 0x5b00 Entry 31 (size 16 bundles) Unsupported Data Reference (57)
ENTRY(kvm_unsupported_data_reference)
KVM_REFLECT(31)
END(kvm_unsupported_data_reference)
.org kvm_ia64_ivt+0x5c00
////////////////////////////////////////////////////////////////////
// 0x5c00 Entry 32 (size 16 bundles) Floating Point FAULT (65)
ENTRY(kvm_floating_point_fault)
KVM_REFLECT(32)
END(kvm_floating_point_fault)
.org kvm_ia64_ivt+0x5d00
/////////////////////////////////////////////////////////////////////
// 0x5d00 Entry 33 (size 16 bundles) Floating Point Trap (66)
ENTRY(kvm_floating_point_trap)
KVM_REFLECT(33)
END(kvm_floating_point_trap)
.org kvm_ia64_ivt+0x5e00
//////////////////////////////////////////////////////////////////////
// 0x5e00 Entry 34 (size 16 bundles) Lower Privilege Transfer Trap (66)
ENTRY(kvm_lower_privilege_trap)
KVM_REFLECT(34)
END(kvm_lower_privilege_trap)
.org kvm_ia64_ivt+0x5f00
//////////////////////////////////////////////////////////////////////
// 0x5f00 Entry 35 (size 16 bundles) Taken Branch Trap (68)
ENTRY(kvm_taken_branch_trap)
KVM_REFLECT(35)
END(kvm_taken_branch_trap)
.org kvm_ia64_ivt+0x6000
////////////////////////////////////////////////////////////////////
// 0x6000 Entry 36 (size 16 bundles) Single Step Trap (69)
ENTRY(kvm_single_step_trap)
KVM_REFLECT(36)
END(kvm_single_step_trap)
.global kvm_virtualization_fault_back
.org kvm_ia64_ivt+0x6100
/////////////////////////////////////////////////////////////////////
// 0x6100 Entry 37 (size 16 bundles) Virtualization Fault
ENTRY(kvm_virtualization_fault)
mov r31=pr
adds r16 = VMM_VCPU_SAVED_GP_OFFSET,r21
;;
st8 [r16] = r1
adds r17 = VMM_VCPU_GP_OFFSET, r21
;;
ld8 r1 = [r17]
cmp.eq p6,p0=EVENT_MOV_FROM_AR,r24
cmp.eq p7,p0=EVENT_MOV_FROM_RR,r24
cmp.eq p8,p0=EVENT_MOV_TO_RR,r24
cmp.eq p9,p0=EVENT_RSM,r24
cmp.eq p10,p0=EVENT_SSM,r24
cmp.eq p11,p0=EVENT_MOV_TO_PSR,r24
cmp.eq p12,p0=EVENT_THASH,r24
(p6) br.dptk.many kvm_asm_mov_from_ar
(p7) br.dptk.many kvm_asm_mov_from_rr
(p8) br.dptk.many kvm_asm_mov_to_rr
(p9) br.dptk.many kvm_asm_rsm
(p10) br.dptk.many kvm_asm_ssm
(p11) br.dptk.many kvm_asm_mov_to_psr
(p12) br.dptk.many kvm_asm_thash
;;
kvm_virtualization_fault_back:
adds r16 = VMM_VCPU_SAVED_GP_OFFSET,r21
;;
ld8 r1 = [r16]
;;
mov r19=37
adds r16 = VMM_VCPU_CAUSE_OFFSET,r21
adds r17 = VMM_VCPU_OPCODE_OFFSET,r21
;;
st8 [r16] = r24
st8 [r17] = r25
;;
cmp.ne p6,p0=EVENT_RFI, r24
(p6) br.sptk kvm_dispatch_virtualization_fault
;;
adds r18=VMM_VPD_BASE_OFFSET,r21
;;
ld8 r18=[r18]
;;
adds r18=VMM_VPD_VIFS_OFFSET,r18
;;
ld8 r18=[r18]
;;
tbit.z p6,p0=r18,63
(p6) br.sptk kvm_dispatch_virtualization_fault
;;
//if vifs.v=1 desert current register frame
alloc r18=ar.pfs,0,0,0,0
br.sptk kvm_dispatch_virtualization_fault
END(kvm_virtualization_fault)
.org kvm_ia64_ivt+0x6200
//////////////////////////////////////////////////////////////
// 0x6200 Entry 38 (size 16 bundles) Reserved
KVM_FAULT(38)
.org kvm_ia64_ivt+0x6300
/////////////////////////////////////////////////////////////////
// 0x6300 Entry 39 (size 16 bundles) Reserved
KVM_FAULT(39)
.org kvm_ia64_ivt+0x6400
/////////////////////////////////////////////////////////////////
// 0x6400 Entry 40 (size 16 bundles) Reserved
KVM_FAULT(40)
.org kvm_ia64_ivt+0x6500
//////////////////////////////////////////////////////////////////
// 0x6500 Entry 41 (size 16 bundles) Reserved
KVM_FAULT(41)
.org kvm_ia64_ivt+0x6600
//////////////////////////////////////////////////////////////////
// 0x6600 Entry 42 (size 16 bundles) Reserved
KVM_FAULT(42)
.org kvm_ia64_ivt+0x6700
//////////////////////////////////////////////////////////////////
// 0x6700 Entry 43 (size 16 bundles) Reserved
KVM_FAULT(43)
.org kvm_ia64_ivt+0x6800
//////////////////////////////////////////////////////////////////
// 0x6800 Entry 44 (size 16 bundles) Reserved
KVM_FAULT(44)
.org kvm_ia64_ivt+0x6900
///////////////////////////////////////////////////////////////////
// 0x6900 Entry 45 (size 16 bundles) IA-32 Exeception
//(17,18,29,41,42,43,44,58,60,61,62,72,73,75,76,77)
ENTRY(kvm_ia32_exception)
KVM_FAULT(45)
END(kvm_ia32_exception)
.org kvm_ia64_ivt+0x6a00
////////////////////////////////////////////////////////////////////
// 0x6a00 Entry 46 (size 16 bundles) IA-32 Intercept (30,31,59,70,71)
ENTRY(kvm_ia32_intercept)
KVM_FAULT(47)
END(kvm_ia32_intercept)
.org kvm_ia64_ivt+0x6c00
/////////////////////////////////////////////////////////////////////
// 0x6c00 Entry 48 (size 16 bundles) Reserved
KVM_FAULT(48)
.org kvm_ia64_ivt+0x6d00
//////////////////////////////////////////////////////////////////////
// 0x6d00 Entry 49 (size 16 bundles) Reserved
KVM_FAULT(49)
.org kvm_ia64_ivt+0x6e00
//////////////////////////////////////////////////////////////////////
// 0x6e00 Entry 50 (size 16 bundles) Reserved
KVM_FAULT(50)
.org kvm_ia64_ivt+0x6f00
/////////////////////////////////////////////////////////////////////
// 0x6f00 Entry 51 (size 16 bundles) Reserved
KVM_FAULT(52)
.org kvm_ia64_ivt+0x7100
////////////////////////////////////////////////////////////////////
// 0x7100 Entry 53 (size 16 bundles) Reserved
KVM_FAULT(53)
.org kvm_ia64_ivt+0x7200
/////////////////////////////////////////////////////////////////////
// 0x7200 Entry 54 (size 16 bundles) Reserved
KVM_FAULT(54)
.org kvm_ia64_ivt+0x7300
////////////////////////////////////////////////////////////////////
// 0x7300 Entry 55 (size 16 bundles) Reserved
KVM_FAULT(55)
.org kvm_ia64_ivt+0x7400
////////////////////////////////////////////////////////////////////
// 0x7400 Entry 56 (size 16 bundles) Reserved
KVM_FAULT(56)
.org kvm_ia64_ivt+0x7500
/////////////////////////////////////////////////////////////////////
// 0x7500 Entry 57 (size 16 bundles) Reserved
KVM_FAULT(57)
.org kvm_ia64_ivt+0x7600
/////////////////////////////////////////////////////////////////////
// 0x7600 Entry 58 (size 16 bundles) Reserved
KVM_FAULT(58)
.org kvm_ia64_ivt+0x7700
////////////////////////////////////////////////////////////////////
// 0x7700 Entry 59 (size 16 bundles) Reserved
KVM_FAULT(59)
.org kvm_ia64_ivt+0x7800
////////////////////////////////////////////////////////////////////
// 0x7800 Entry 60 (size 16 bundles) Reserved
KVM_FAULT(60)
.org kvm_ia64_ivt+0x7900
/////////////////////////////////////////////////////////////////////
// 0x7900 Entry 61 (size 16 bundles) Reserved
KVM_FAULT(61)
.org kvm_ia64_ivt+0x7a00
/////////////////////////////////////////////////////////////////////
// 0x7a00 Entry 62 (size 16 bundles) Reserved
KVM_FAULT(62)
.org kvm_ia64_ivt+0x7b00
/////////////////////////////////////////////////////////////////////
// 0x7b00 Entry 63 (size 16 bundles) Reserved
KVM_FAULT(63)
.org kvm_ia64_ivt+0x7c00
////////////////////////////////////////////////////////////////////
// 0x7c00 Entry 64 (size 16 bundles) Reserved
KVM_FAULT(64)
.org kvm_ia64_ivt+0x7d00
/////////////////////////////////////////////////////////////////////
// 0x7d00 Entry 65 (size 16 bundles) Reserved
KVM_FAULT(65)
.org kvm_ia64_ivt+0x7e00
/////////////////////////////////////////////////////////////////////
// 0x7e00 Entry 66 (size 16 bundles) Reserved
KVM_FAULT(66)
.org kvm_ia64_ivt+0x7f00
////////////////////////////////////////////////////////////////////
// 0x7f00 Entry 67 (size 16 bundles) Reserved
KVM_FAULT(67)
.org kvm_ia64_ivt+0x8000
// 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...
ENTRY(kvm_dtlb_miss_dispatch)
mov r19 = 2
KVM_SAVE_MIN_WITH_COVER_R19
alloc r14=ar.pfs,0,0,3,0
mov out0=cr.ifa
mov out1=r15
adds r3=8,r2 // set up second base pointer
;;
ssm psr.ic
;;
srlz.i // guarantee that interruption collection is on
;;
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor_prepare),gp
;;
KVM_SAVE_REST
KVM_SAVE_EXTRA
mov rp=r14
;;
adds out2=16,r12
br.call.sptk.many b6=kvm_page_fault
END(kvm_dtlb_miss_dispatch)
ENTRY(kvm_itlb_miss_dispatch)
KVM_SAVE_MIN_WITH_COVER_R19
alloc r14=ar.pfs,0,0,3,0
mov out0=cr.ifa
mov out1=r15
adds r3=8,r2 // set up second base pointer
;;
ssm psr.ic
;;
srlz.i // guarantee that interruption collection is on
;;
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
mov rp=r14
;;
adds out2=16,r12
br.call.sptk.many b6=kvm_page_fault
END(kvm_itlb_miss_dispatch)
ENTRY(kvm_dispatch_reflection)
/*
* Input:
* psr.ic: off
* r19: intr type (offset into ivt, see ia64_int.h)
* r31: contains saved predicates (pr)
*/
KVM_SAVE_MIN_WITH_COVER_R19
alloc r14=ar.pfs,0,0,5,0
mov out0=cr.ifa
mov out1=cr.isr
mov out2=cr.iim
mov out3=r15
adds r3=8,r2 // set up second base pointer
;;
ssm psr.ic
;;
srlz.i // guarantee that interruption collection is on
;;
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
mov rp=r14
;;
adds out4=16,r12
br.call.sptk.many b6=reflect_interruption
END(kvm_dispatch_reflection)
ENTRY(kvm_dispatch_virtualization_fault)
adds r16 = VMM_VCPU_CAUSE_OFFSET,r21
adds r17 = VMM_VCPU_OPCODE_OFFSET,r21
;;
st8 [r16] = r24
st8 [r17] = r25
;;
KVM_SAVE_MIN_WITH_COVER_R19
;;
alloc r14=ar.pfs,0,0,2,0 // (must be first in insn group!)
mov out0=r13 //vcpu
adds r3=8,r2 // set up second base pointer
;;
ssm psr.ic
;;
srlz.i // guarantee that interruption collection is on
;;
(p15) ssm psr.i // restore psr.i
addl r14=@gprel(ia64_leave_hypervisor_prepare),gp
;;
KVM_SAVE_REST
KVM_SAVE_EXTRA
mov rp=r14
;;
adds out1=16,sp //regs
br.call.sptk.many b6=kvm_emulate
END(kvm_dispatch_virtualization_fault)
ENTRY(kvm_dispatch_interrupt)
KVM_SAVE_MIN_WITH_COVER_R19 // uses r31; defines r2 and r3
;;
alloc r14=ar.pfs,0,0,1,0 // must be first in an insn group
adds r3=8,r2 // set up second base pointer for SAVE_REST
;;
ssm psr.ic
;;
srlz.i
;;
(p15) ssm psr.i
addl r14=@gprel(ia64_leave_hypervisor),gp
;;
KVM_SAVE_REST
mov rp=r14
;;
mov out0=r13 // pass pointer to pt_regs as second arg
br.call.sptk.many b6=kvm_ia64_handle_irq
END(kvm_dispatch_interrupt)
GLOBAL_ENTRY(ia64_leave_nested)
rsm psr.i
;;
adds r21=PT(PR)+16,r12
;;
lfetch [r21],PT(CR_IPSR)-PT(PR)
adds r2=PT(B6)+16,r12
adds r3=PT(R16)+16,r12
;;
lfetch [r21]
ld8 r28=[r2],8 // load b6
adds r29=PT(R24)+16,r12
ld8.fill r16=[r3]
adds r3=PT(AR_CSD)-PT(R16),r3
adds r30=PT(AR_CCV)+16,r12
;;
ld8.fill r24=[r29]
ld8 r15=[r30] // load ar.ccv
;;
ld8 r29=[r2],16 // load b7
ld8 r30=[r3],16 // load ar.csd
;;
ld8 r31=[r2],16 // load ar.ssd
ld8.fill r8=[r3],16
;;
ld8.fill r9=[r2],16
ld8.fill r10=[r3],PT(R17)-PT(R10)
;;
ld8.fill r11=[r2],PT(R18)-PT(R11)
ld8.fill r17=[r3],16
;;
ld8.fill r18=[r2],16
ld8.fill r19=[r3],16
;;
ld8.fill r20=[r2],16
ld8.fill r21=[r3],16
mov ar.csd=r30
mov ar.ssd=r31
;;
rsm psr.i | psr.ic
// initiate turning off of interrupt and interruption collection
invala // invalidate ALAT
;;
srlz.i
;;
ld8.fill r22=[r2],24
ld8.fill r23=[r3],24
mov b6=r28
;;
ld8.fill r25=[r2],16
ld8.fill r26=[r3],16
mov b7=r29
;;
ld8.fill r27=[r2],16
ld8.fill r28=[r3],16
;;
ld8.fill r29=[r2],16
ld8.fill r30=[r3],24
;;
ld8.fill r31=[r2],PT(F9)-PT(R31)
adds r3=PT(F10)-PT(F6),r3
;;
ldf.fill f9=[r2],PT(F6)-PT(F9)
ldf.fill f10=[r3],PT(F8)-PT(F10)
;;
ldf.fill f6=[r2],PT(F7)-PT(F6)
;;
ldf.fill f7=[r2],PT(F11)-PT(F7)
ldf.fill f8=[r3],32
;;
srlz.i // ensure interruption collection is off
mov ar.ccv=r15
;;
bsw.0 // switch back to bank 0 (no stop bit required beforehand...)
;;
ldf.fill f11=[r2]
// mov r18=r13
// mov r21=r13
adds r16=PT(CR_IPSR)+16,r12
adds r17=PT(CR_IIP)+16,r12
;;
ld8 r29=[r16],16 // load cr.ipsr
ld8 r28=[r17],16 // load cr.iip
;;
ld8 r30=[r16],16 // load cr.ifs
ld8 r25=[r17],16 // load ar.unat
;;
ld8 r26=[r16],16 // load ar.pfs
ld8 r27=[r17],16 // load ar.rsc
cmp.eq p9,p0=r0,r0
// set p9 to indicate that we should restore cr.ifs
;;
ld8 r24=[r16],16 // load ar.rnat (may be garbage)
ld8 r23=[r17],16// load ar.bspstore (may be garbage)
;;
ld8 r31=[r16],16 // load predicates
ld8 r22=[r17],16 // load b0
;;
ld8 r19=[r16],16 // load ar.rsc value for "loadrs"
ld8.fill r1=[r17],16 // load r1
;;
ld8.fill r12=[r16],16
ld8.fill r13=[r17],16
;;
ld8 r20=[r16],16 // ar.fpsr
ld8.fill r15=[r17],16
;;
ld8.fill r14=[r16],16
ld8.fill r2=[r17]
;;
ld8.fill r3=[r16]
;;
mov r16=ar.bsp // get existing backing store pointer
;;
mov b0=r22
mov ar.pfs=r26
mov cr.ifs=r30
mov cr.ipsr=r29
mov ar.fpsr=r20
mov cr.iip=r28
;;
mov ar.rsc=r27
mov ar.unat=r25
mov pr=r31,-1
rfi
END(ia64_leave_nested)
GLOBAL_ENTRY(ia64_leave_hypervisor_prepare)
/*
* work.need_resched etc. mustn't get changed
*by this CPU before it returns to
* user- or fsys-mode, hence we disable interrupts early on:
*/
adds r2 = PT(R4)+16,r12
adds r3 = PT(R5)+16,r12
adds r8 = PT(EML_UNAT)+16,r12
;;
ld8 r8 = [r8]
;;
mov ar.unat=r8
;;
ld8.fill r4=[r2],16 //load r4
ld8.fill r5=[r3],16 //load r5
;;
ld8.fill r6=[r2] //load r6
ld8.fill r7=[r3] //load r7
;;
END(ia64_leave_hypervisor_prepare)
//fall through
GLOBAL_ENTRY(ia64_leave_hypervisor)
rsm psr.i
;;
br.call.sptk.many b0=leave_hypervisor_tail
;;
adds r20=PT(PR)+16,r12
adds r8=PT(EML_UNAT)+16,r12
;;
ld8 r8=[r8]
;;
mov ar.unat=r8
;;
lfetch [r20],PT(CR_IPSR)-PT(PR)
adds r2 = PT(B6)+16,r12
adds r3 = PT(B7)+16,r12
;;
lfetch [r20]
;;
ld8 r24=[r2],16 /* B6 */
ld8 r25=[r3],16 /* B7 */
;;
ld8 r26=[r2],16 /* ar_csd */
ld8 r27=[r3],16 /* ar_ssd */
mov b6 = r24
;;
ld8.fill r8=[r2],16
ld8.fill r9=[r3],16
mov b7 = r25
;;
mov ar.csd = r26
mov ar.ssd = r27
;;
ld8.fill r10=[r2],PT(R15)-PT(R10)
ld8.fill r11=[r3],PT(R14)-PT(R11)
;;
ld8.fill r15=[r2],PT(R16)-PT(R15)
ld8.fill r14=[r3],PT(R17)-PT(R14)
;;
ld8.fill r16=[r2],16
ld8.fill r17=[r3],16
;;
ld8.fill r18=[r2],16
ld8.fill r19=[r3],16
;;
ld8.fill r20=[r2],16
ld8.fill r21=[r3],16
;;
ld8.fill r22=[r2],16
ld8.fill r23=[r3],16
;;
ld8.fill r24=[r2],16
ld8.fill r25=[r3],16
;;
ld8.fill r26=[r2],16
ld8.fill r27=[r3],16
;;
ld8.fill r28=[r2],16
ld8.fill r29=[r3],16
;;
ld8.fill r30=[r2],PT(F6)-PT(R30)
ld8.fill r31=[r3],PT(F7)-PT(R31)
;;
rsm psr.i | psr.ic
// initiate turning off of interrupt and interruption collection
invala // invalidate ALAT
;;
srlz.i // ensure interruption collection is off
;;
bsw.0
;;
adds r16 = PT(CR_IPSR)+16,r12
adds r17 = PT(CR_IIP)+16,r12
mov r21=r13 // get current
;;
ld8 r31=[r16],16 // load cr.ipsr
ld8 r30=[r17],16 // load cr.iip
;;
ld8 r29=[r16],16 // load cr.ifs
ld8 r28=[r17],16 // load ar.unat
;;
ld8 r27=[r16],16 // load ar.pfs
ld8 r26=[r17],16 // load ar.rsc
;;
ld8 r25=[r16],16 // load ar.rnat
ld8 r24=[r17],16 // load ar.bspstore
;;
ld8 r23=[r16],16 // load predicates
ld8 r22=[r17],16 // load b0
;;
ld8 r20=[r16],16 // load ar.rsc value for "loadrs"
ld8.fill r1=[r17],16 //load r1
;;
ld8.fill r12=[r16],16 //load r12
ld8.fill r13=[r17],PT(R2)-PT(R13) //load r13
;;
ld8 r19=[r16],PT(R3)-PT(AR_FPSR) //load ar_fpsr
ld8.fill r2=[r17],PT(AR_CCV)-PT(R2) //load r2
;;
ld8.fill r3=[r16] //load r3
ld8 r18=[r17] //load ar_ccv
;;
mov ar.fpsr=r19
mov ar.ccv=r18
shr.u r18=r20,16
;;
kvm_rbs_switch:
mov r19=96
kvm_dont_preserve_current_frame:
/*
* To prevent leaking bits between the hypervisor and guest domain,
* we must clear the stacked registers in the "invalid" partition here.
* 5 registers/cycle on McKinley).
*/
# define pRecurse p6
# define pReturn p7
# define Nregs 14
alloc loc0=ar.pfs,2,Nregs-2,2,0
shr.u loc1=r18,9 // RNaTslots <= floor(dirtySize / (64*8))
sub r19=r19,r18 // r19 = (physStackedSize + 8) - dirtySize
;;
mov ar.rsc=r20 // load ar.rsc to be used for "loadrs"
shladd in0=loc1,3,r19
mov in1=0
;;
TEXT_ALIGN(32)
kvm_rse_clear_invalid:
alloc loc0=ar.pfs,2,Nregs-2,2,0
cmp.lt pRecurse,p0=Nregs*8,in0
// if more than Nregs regs left to clear, (re)curse
add out0=-Nregs*8,in0
add out1=1,in1 // increment recursion count
mov loc1=0
mov loc2=0
;;
mov loc3=0
mov loc4=0
mov loc5=0
mov loc6=0
mov loc7=0
(pRecurse) br.call.dptk.few b0=kvm_rse_clear_invalid
;;
mov loc8=0
mov loc9=0
cmp.ne pReturn,p0=r0,in1
// if recursion count != 0, we need to do a br.ret
mov loc10=0
mov loc11=0
(pReturn) br.ret.dptk.many b0
# undef pRecurse
# undef pReturn
// loadrs has already been shifted
alloc r16=ar.pfs,0,0,0,0 // drop current register frame
;;
loadrs
;;
mov ar.bspstore=r24
;;
mov ar.unat=r28
mov ar.rnat=r25
mov ar.rsc=r26
;;
mov cr.ipsr=r31
mov cr.iip=r30
mov cr.ifs=r29
mov ar.pfs=r27
adds r18=VMM_VPD_BASE_OFFSET,r21
;;
ld8 r18=[r18] //vpd
adds r17=VMM_VCPU_ISR_OFFSET,r21
;;
ld8 r17=[r17]
adds r19=VMM_VPD_VPSR_OFFSET,r18
;;
ld8 r19=[r19] //vpsr
mov r25=r18
adds r16= VMM_VCPU_GP_OFFSET,r21
;;
ld8 r16= [r16] // Put gp in r24
movl r24=@gprel(ia64_vmm_entry) // calculate return address
;;
add r24=r24,r16
;;
br.sptk.many kvm_vps_sync_write // call the service
;;
END(ia64_leave_hypervisor)
// fall through
GLOBAL_ENTRY(ia64_vmm_entry)
/*
* must be at bank 0
* parameter:
* r17:cr.isr
* r18:vpd
* r19:vpsr
* r22:b0
* r23:predicate
*/
mov r24=r22
mov r25=r18
tbit.nz p1,p2 = r19,IA64_PSR_IC_BIT // p1=vpsr.ic
(p1) br.cond.sptk.few kvm_vps_resume_normal
(p2) br.cond.sptk.many kvm_vps_resume_handler
;;
END(ia64_vmm_entry)
/*
* extern u64 ia64_call_vsa(u64 proc, u64 arg1, u64 arg2,
* u64 arg3, u64 arg4, u64 arg5,
* u64 arg6, u64 arg7);
*
* XXX: The currently defined services use only 4 args at the max. The
* rest are not consumed.
*/
GLOBAL_ENTRY(ia64_call_vsa)
.regstk 4,4,0,0
rpsave = loc0
pfssave = loc1
psrsave = loc2
entry = loc3
hostret = r24
alloc pfssave=ar.pfs,4,4,0,0
mov rpsave=rp
adds entry=VMM_VCPU_VSA_BASE_OFFSET, r13
;;
ld8 entry=[entry]
1: mov hostret=ip
mov r25=in1 // copy arguments
mov r26=in2
mov r27=in3
mov psrsave=psr
;;
tbit.nz p6,p0=psrsave,14 // IA64_PSR_I
tbit.nz p7,p0=psrsave,13 // IA64_PSR_IC
;;
add hostret=2f-1b,hostret // calculate return address
add entry=entry,in0
;;
rsm psr.i | psr.ic
;;
srlz.i
mov b6=entry
br.cond.sptk b6 // call the service
2:
// Architectural sequence for enabling interrupts if necessary
(p7) ssm psr.ic
;;
(p7) srlz.i
;;
(p6) ssm psr.i
;;
mov rp=rpsave
mov ar.pfs=pfssave
mov r8=r31
;;
srlz.d
br.ret.sptk rp
END(ia64_call_vsa)
#define INIT_BSPSTORE ((4<<30)-(12<<20)-0x100)
GLOBAL_ENTRY(vmm_reset_entry)
//set up ipsr, iip, vpd.vpsr, dcr
// For IPSR: it/dt/rt=1, i/ic=1, si=1, vm/bn=1
// For DCR: all bits 0
bsw.0
;;
mov r21 =r13
adds r14=-VMM_PT_REGS_SIZE, r12
;;
movl r6=0x501008826000 // IPSR dt/rt/it:1;i/ic:1, si:1, vm/bn:1
movl r10=0x8000000000000000
adds r16=PT(CR_IIP), r14
adds r20=PT(R1), r14
;;
rsm psr.ic | psr.i
;;
srlz.i
;;
mov ar.rsc = 0
;;
flushrs
;;
mov ar.bspstore = 0
// clear BSPSTORE
;;
mov cr.ipsr=r6
mov cr.ifs=r10
ld8 r4 = [r16] // Set init iip for first run.
ld8 r1 = [r20]
;;
mov cr.iip=r4
adds r16=VMM_VPD_BASE_OFFSET,r13
;;
ld8 r18=[r16]
;;
adds r19=VMM_VPD_VPSR_OFFSET,r18
;;
ld8 r19=[r19]
mov r17=r0
mov r22=r0
mov r23=r0
br.cond.sptk ia64_vmm_entry
br.ret.sptk b0
END(vmm_reset_entry)
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