powerpc/64s: move some exception handlers out of line

(backport only)

We're about to grow the exception handlers, which will make a bunch of them
no longer fit within the space available. We move them out of line.

This is a fiddly and error-prone business, so in the interests of reviewability
I haven't merged this in with the addition of the entry flush.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 0c8b966e807022639504dab55f921ce49f14fab7..05c1f0c903166aa33c2e6cb4da1209cdc23d2749 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -519,6 +519,10 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
 EXC_REAL_BEGIN(data_access_slb, 0x380, 0x400)
        SET_SCRATCH0(r13)
        EXCEPTION_PROLOG_0(PACA_EXSLB)
+       b tramp_data_access_slb
+EXC_REAL_END(data_access_slb, 0x380, 0x400)
+
+TRAMP_REAL_BEGIN(tramp_data_access_slb)
        EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x380)
        std     r3,PACA_EXSLB+EX_R3(r13)
        mfspr   r3,SPRN_DAR
@@ -537,7 +541,6 @@ EXC_REAL_BEGIN(data_access_slb, 0x380, 0x400)
        mtctr   r10
        bctr
 #endif
-EXC_REAL_END(data_access_slb, 0x380, 0x400)
 
 EXC_VIRT_BEGIN(data_access_slb, 0x4380, 0x4400)
        SET_SCRATCH0(r13)
@@ -587,6 +590,10 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
 EXC_REAL_BEGIN(instruction_access_slb, 0x480, 0x500)
        SET_SCRATCH0(r13)
        EXCEPTION_PROLOG_0(PACA_EXSLB)
+       b tramp_instruction_access_slb
+EXC_REAL_END(instruction_access_slb, 0x480, 0x500)
+
+TRAMP_REAL_BEGIN(tramp_instruction_access_slb)
        EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480)
        std     r3,PACA_EXSLB+EX_R3(r13)
        mfspr   r3,SPRN_SRR0            /* SRR0 is faulting address */
@@ -600,7 +607,6 @@ EXC_REAL_BEGIN(instruction_access_slb, 0x480, 0x500)
        mtctr   r10
        bctr
 #endif
-EXC_REAL_END(instruction_access_slb, 0x480, 0x500)
 
 EXC_VIRT_BEGIN(instruction_access_slb, 0x4480, 0x4500)
        SET_SCRATCH0(r13)