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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-02-09 20:29:28 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-11 13:35:12 +0100 |
| commit | d524dda719f06967db4d3ba519edf9267f84c155 (patch) | |
| tree | 91120a551f132ba10a5a711b2a01bc452d7380af /arch/powerpc/kernel/head_booke.h | |
| parent | powerpc/syscall: Do not check unsupported scv vector on PPC32 (diff) | |
| download | linux-d524dda719f06967db4d3ba519edf9267f84c155.tar.xz linux-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/head_booke.h')
| -rw-r--r-- | arch/powerpc/kernel/head_booke.h | 19 |
1 files changed, 0 insertions, 19 deletions
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h index 5f565232b99d..47857795f50a 100644 --- a/arch/powerpc/kernel/head_booke.h +++ b/arch/powerpc/kernel/head_booke.h @@ -130,25 +130,6 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV) SAVE_2GPRS(7, r11) addi r2,r10,-THREAD - /* Check to see if the dbcr0 register is set up to debug. Use the - internal debug mode bit to do this. */ - lwz r12,THREAD_DBCR0(r10) - andis. r12,r12,DBCR0_IDM@h - beq+ 3f - /* From user and task is ptraced - load up global dbcr0 */ - li r12,-1 /* clear all pending debug events */ - mtspr SPRN_DBSR,r12 - lis r11,global_dbcr0@ha - addi r11,r11,global_dbcr0@l -#ifdef CONFIG_SMP - lwz r10, TASK_CPU(r2) - slwi r10, r10, 2 - add r11, r11, r10 -#endif - lwz r12,0(r11) - mtspr SPRN_DBCR0,r12 - -3: b transfer_to_syscall /* jump to handler */ .endm |