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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-02-09 19:29:28 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-02-11 23:35:12 +1100 |
| commit | d524dda719f06967db4d3ba519edf9267f84c155 (patch) | |
| tree | 91120a551f132ba10a5a711b2a01bc452d7380af /arch/powerpc/kernel/entry_32.S | |
| parent | powerpc/syscall: Do not check unsupported scv vector on PPC32 (diff) | |
| download | linux-dev-d524dda719f06967db4d3ba519edf9267f84c155.tar.xz linux-dev-d524dda719f06967db4d3ba519edf9267f84c155.zip | |
powerpc/32: Handle bookE debugging in C in syscall entry/exit
The handling of SPRN_DBCR0 and other registers can easily
be done in C instead of ASM.
For that, create booke_load_dbcr0() and booke_restore_dbcr0().
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1a7515f9258b27a9177de88491a8bb79b255ceb7.1612898425.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 9dd90be9f8a5..78c430b7f9d9 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -343,13 +343,6 @@ ret_from_syscall: addi r4,r1,STACK_FRAME_OVERHEAD li r5,0 bl syscall_exit_prepare -#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE) - /* If the process has its own DBCR0 value, load it up. The internal - debug mode bit tells us that dbcr0 should be loaded. */ - lwz r0,THREAD+THREAD_DBCR0(r2) - andis. r10,r0,DBCR0_IDM@h - bnel- load_dbcr0 -#endif #ifdef CONFIG_PPC_47x lis r4,icache_44x_need_flush@ha lwz r5,icache_44x_need_flush@l(r4) |