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| author | Max Filippov <jcmvbkbc@gmail.com> | 2021-07-26 07:32:55 -0700 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2021-10-18 22:19:35 -0700 |
| commit | da0a4e5c8fbcce3d1afebf9f2a967083bb19634d (patch) | |
| tree | 5decac9abd975143a4f0f0fd63607dc4aaadb324 /arch/xtensa/kernel/vectors.S | |
| parent | 09af39f649dac66c2681ca53977275fe876690cc (diff) | |
xtensa: only build windowed register support code when needed
There's no need in window overflow/underflow/alloca exception handlers
or window spill code when neither kernel nor userspace support windowed
registers. Don't build or link it.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/kernel/vectors.S')
| -rw-r--r-- | arch/xtensa/kernel/vectors.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S index 0eed5aa82914..407ece204e7c 100644 --- a/arch/xtensa/kernel/vectors.S +++ b/arch/xtensa/kernel/vectors.S @@ -226,6 +226,7 @@ ENTRY(_DoubleExceptionVector) xsr a0, depc # get DEPC, save a0 +#ifdef SUPPORT_WINDOWED movi a2, WINDOW_VECTORS_VADDR _bltu a0, a2, .Lfixup addi a2, a2, WINDOW_VECTORS_SIZE @@ -275,6 +276,10 @@ _DoubleExceptionVector_WindowUnderflow: l32i a0, a0, EXC_TABLE_FAST_USER jx a0 +#else + j .Lfixup +#endif + /* * We only allow the ITLB miss exception if we are in kernel space. * All other exceptions are unexpected and thus unrecoverable! @@ -343,6 +348,7 @@ _DoubleExceptionVector_WindowUnderflow: l32i a0, a0, EXC_TABLE_FAST_USER jx a0 +#ifdef SUPPORT_WINDOWED /* * Restart window OVERFLOW exception. * Currently: @@ -475,9 +481,12 @@ _DoubleExceptionVector_handle_exception: rsr a0, depc rotw -3 j 1b +#endif ENDPROC(_DoubleExceptionVector) +#ifdef SUPPORT_WINDOWED + /* * Fixup handler for TLB miss in double exception handler for window owerflow. * We get here with windowbase set to the window that was being spilled and @@ -590,6 +599,8 @@ ENTRY(window_overflow_restore_a0_fixup) ENDPROC(window_overflow_restore_a0_fixup) +#endif + /* * Debug interrupt vector * @@ -687,6 +698,8 @@ _SimulateUserKernelVectorException: .section .WindowVectors.text, "ax" +#ifdef SUPPORT_WINDOWED + /* 4-Register Window Overflow Vector (Handler) */ ENTRY_ALIGN64(_WindowOverflow4) @@ -787,4 +800,6 @@ ENTRY_ALIGN64(_WindowUnderflow12) ENDPROC(_WindowUnderflow12) +#endif + .text |