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

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(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>
This commit is contained in:
Daniel Axtens
2020-11-20 10:57:37 +11:00
committed by Chris
parent 877e0f600d
commit 502db48034
1 changed files with 8 additions and 2 deletions
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10
arch/powerpc/kernel/exceptions-64s.S
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@@ -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)