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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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[IA64] pv_ops: move some functions in ivt.S to avoid lack of space.
move interrupt, page_fault, non_syscall, dispatch_unaligned_handler and
dispatch_to_fault_handler to avoid lack of instructin space.
The change set 4dcc29e157 bloated
SAVE_MIN_WITH_COVER, SAVE_MIN_WITH_COVER_R19 so that it bloated the
functions which uses those macros.
In the native case, only dispatch_illegal_op_fault had to be moved.
When paravirtualized case the all functions which use the macros need
to be moved to avoid the lack of space.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata
Tony Luck
parent
8a2f2ccc7a
commit
4d58bbcc89
1 changed files with 133 additions and 128 deletions
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@ -515,27 +515,6 @@ ENTRY(ikey_miss)
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FAULT(6)
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END(ikey_miss)
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//-----------------------------------------------------------------------------------
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// call do_page_fault (predicates are in r31, psr.dt may be off, r16 is faulting address)
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ENTRY(page_fault)
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SSM_PSR_DT_AND_SRLZ_I
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;;
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SAVE_MIN_WITH_COVER
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alloc r15=ar.pfs,0,0,3,0
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MOV_FROM_IFA(out0)
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MOV_FROM_ISR(out1)
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r14, r3)
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adds r3=8,r2 // set up second base pointer
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SSM_PSR_I(p15, p15, r14) // restore psr.i
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movl r14=ia64_leave_kernel
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;;
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SAVE_REST
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mov rp=r14
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;;
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adds out2=16,r12 // out2 = pointer to pt_regs
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br.call.sptk.many b6=ia64_do_page_fault // ignore return address
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END(page_fault)
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.org ia64_ivt+0x1c00
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/////////////////////////////////////////////////////////////////////////////////////////
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// 0x1c00 Entry 7 (size 64 bundles) Data Key Miss (12,51)
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@ -896,26 +875,8 @@ END(break_fault)
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/////////////////////////////////////////////////////////////////////////////////////////
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// 0x3000 Entry 12 (size 64 bundles) External Interrupt (4)
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ENTRY(interrupt)
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DBG_FAULT(12)
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mov r31=pr // prepare to save predicates
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;;
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SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r14)
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// ensure everybody knows psr.ic is back on
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adds r3=8,r2 // set up second base pointer for SAVE_REST
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;;
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SAVE_REST
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;;
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MCA_RECOVER_RANGE(interrupt)
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alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
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MOV_FROM_IVR(out0, r8) // pass cr.ivr as first arg
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add out1=16,sp // pass pointer to pt_regs as second arg
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;;
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srlz.d // make sure we see the effect of cr.ivr
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movl r14=ia64_leave_kernel
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;;
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mov rp=r14
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br.call.sptk.many b6=ia64_handle_irq
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/* interrupt handler has become too big to fit this area. */
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br.sptk.many __interrupt
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END(interrupt)
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.org ia64_ivt+0x3400
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@ -1125,105 +1086,18 @@ END(account_sys_enter)
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DBG_FAULT(17)
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FAULT(17)
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ENTRY(non_syscall)
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mov ar.rsc=r27 // restore ar.rsc before SAVE_MIN_WITH_COVER
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;;
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SAVE_MIN_WITH_COVER
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// There is no particular reason for this code to be here, other than that
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// there happens to be space here that would go unused otherwise. If this
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// fault ever gets "unreserved", simply moved the following code to a more
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// suitable spot...
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alloc r14=ar.pfs,0,0,2,0
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MOV_FROM_IIM(out0)
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add out1=16,sp
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adds r3=8,r2 // set up second base pointer for SAVE_REST
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r15, r24)
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// guarantee that interruption collection is on
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SSM_PSR_I(p15, p15, r15) // restore psr.i
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movl r15=ia64_leave_kernel
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;;
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SAVE_REST
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mov rp=r15
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;;
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br.call.sptk.many b6=ia64_bad_break // avoid WAW on CFM and ignore return addr
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END(non_syscall)
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.org ia64_ivt+0x4800
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/////////////////////////////////////////////////////////////////////////////////////////
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// 0x4800 Entry 18 (size 64 bundles) Reserved
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DBG_FAULT(18)
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FAULT(18)
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/*
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* There is no particular reason for this code to be here, other than that
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* there happens to be space here that would go unused otherwise. If this
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* fault ever gets "unreserved", simply moved the following code to a more
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* suitable spot...
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*/
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ENTRY(dispatch_unaligned_handler)
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SAVE_MIN_WITH_COVER
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;;
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alloc r14=ar.pfs,0,0,2,0 // now it's safe (must be first in insn group!)
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MOV_FROM_IFA(out0)
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adds out1=16,sp
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24)
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// guarantee that interruption collection is on
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SSM_PSR_I(p15, p15, r3) // restore psr.i
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adds r3=8,r2 // set up second base pointer
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;;
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SAVE_REST
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movl r14=ia64_leave_kernel
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;;
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mov rp=r14
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br.sptk.many ia64_prepare_handle_unaligned
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END(dispatch_unaligned_handler)
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.org ia64_ivt+0x4c00
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/////////////////////////////////////////////////////////////////////////////////////////
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// 0x4c00 Entry 19 (size 64 bundles) Reserved
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DBG_FAULT(19)
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FAULT(19)
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/*
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* There is no particular reason for this code to be here, other than that
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* there happens to be space here that would go unused otherwise. If this
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* fault ever gets "unreserved", simply moved the following code to a more
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* suitable spot...
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*/
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ENTRY(dispatch_to_fault_handler)
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/*
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* Input:
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* psr.ic: off
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* r19: fault vector number (e.g., 24 for General Exception)
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* r31: contains saved predicates (pr)
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*/
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SAVE_MIN_WITH_COVER_R19
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alloc r14=ar.pfs,0,0,5,0
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MOV_FROM_ISR(out1)
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MOV_FROM_IFA(out2)
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MOV_FROM_IIM(out3)
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MOV_FROM_ITIR(out4)
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;;
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, out0)
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// guarantee that interruption collection is on
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mov out0=r15
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;;
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SSM_PSR_I(p15, p15, r3) // restore psr.i
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adds r3=8,r2 // set up second base pointer for SAVE_REST
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;;
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SAVE_REST
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movl r14=ia64_leave_kernel
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;;
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mov rp=r14
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br.call.sptk.many b6=ia64_fault
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END(dispatch_to_fault_handler)
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//
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// --- End of long entries, Beginning of short entries
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//
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@ -1670,6 +1544,137 @@ END(ia32_interrupt)
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DBG_FAULT(67)
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FAULT(67)
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//-----------------------------------------------------------------------------------
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// call do_page_fault (predicates are in r31, psr.dt may be off, r16 is faulting address)
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ENTRY(page_fault)
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SSM_PSR_DT_AND_SRLZ_I
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;;
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SAVE_MIN_WITH_COVER
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alloc r15=ar.pfs,0,0,3,0
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MOV_FROM_IFA(out0)
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MOV_FROM_ISR(out1)
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r14, r3)
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adds r3=8,r2 // set up second base pointer
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SSM_PSR_I(p15, p15, r14) // restore psr.i
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movl r14=ia64_leave_kernel
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;;
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SAVE_REST
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mov rp=r14
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;;
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adds out2=16,r12 // out2 = pointer to pt_regs
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br.call.sptk.many b6=ia64_do_page_fault // ignore return address
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END(page_fault)
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ENTRY(non_syscall)
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mov ar.rsc=r27 // restore ar.rsc before SAVE_MIN_WITH_COVER
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;;
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SAVE_MIN_WITH_COVER
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// There is no particular reason for this code to be here, other than that
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// there happens to be space here that would go unused otherwise. If this
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// fault ever gets "unreserved", simply moved the following code to a more
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// suitable spot...
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alloc r14=ar.pfs,0,0,2,0
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MOV_FROM_IIM(out0)
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add out1=16,sp
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adds r3=8,r2 // set up second base pointer for SAVE_REST
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r15, r24)
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// guarantee that interruption collection is on
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SSM_PSR_I(p15, p15, r15) // restore psr.i
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movl r15=ia64_leave_kernel
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;;
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SAVE_REST
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mov rp=r15
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;;
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br.call.sptk.many b6=ia64_bad_break // avoid WAW on CFM and ignore return addr
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END(non_syscall)
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ENTRY(__interrupt)
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DBG_FAULT(12)
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mov r31=pr // prepare to save predicates
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;;
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SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r14)
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// ensure everybody knows psr.ic is back on
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adds r3=8,r2 // set up second base pointer for SAVE_REST
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;;
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SAVE_REST
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;;
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MCA_RECOVER_RANGE(interrupt)
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alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
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MOV_FROM_IVR(out0, r8) // pass cr.ivr as first arg
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add out1=16,sp // pass pointer to pt_regs as second arg
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;;
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srlz.d // make sure we see the effect of cr.ivr
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movl r14=ia64_leave_kernel
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;;
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mov rp=r14
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br.call.sptk.many b6=ia64_handle_irq
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END(__interrupt)
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/*
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* There is no particular reason for this code to be here, other than that
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* there happens to be space here that would go unused otherwise. If this
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* fault ever gets "unreserved", simply moved the following code to a more
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* suitable spot...
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*/
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ENTRY(dispatch_unaligned_handler)
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SAVE_MIN_WITH_COVER
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;;
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alloc r14=ar.pfs,0,0,2,0 // now it's safe (must be first in insn group!)
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MOV_FROM_IFA(out0)
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adds out1=16,sp
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24)
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// guarantee that interruption collection is on
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SSM_PSR_I(p15, p15, r3) // restore psr.i
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adds r3=8,r2 // set up second base pointer
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;;
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SAVE_REST
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movl r14=ia64_leave_kernel
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;;
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mov rp=r14
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br.sptk.many ia64_prepare_handle_unaligned
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END(dispatch_unaligned_handler)
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/*
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* There is no particular reason for this code to be here, other than that
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* there happens to be space here that would go unused otherwise. If this
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* fault ever gets "unreserved", simply moved the following code to a more
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* suitable spot...
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*/
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ENTRY(dispatch_to_fault_handler)
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/*
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* Input:
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* psr.ic: off
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* r19: fault vector number (e.g., 24 for General Exception)
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* r31: contains saved predicates (pr)
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*/
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SAVE_MIN_WITH_COVER_R19
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alloc r14=ar.pfs,0,0,5,0
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MOV_FROM_ISR(out1)
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MOV_FROM_IFA(out2)
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MOV_FROM_IIM(out3)
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MOV_FROM_ITIR(out4)
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;;
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SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, out0)
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// guarantee that interruption collection is on
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mov out0=r15
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;;
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SSM_PSR_I(p15, p15, r3) // restore psr.i
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adds r3=8,r2 // set up second base pointer for SAVE_REST
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;;
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SAVE_REST
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movl r14=ia64_leave_kernel
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;;
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mov rp=r14
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br.call.sptk.many b6=ia64_fault
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END(dispatch_to_fault_handler)
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/*
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* Squatting in this space ...
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*
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