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| author | Sven Schnelle <svens@linux.ibm.com> | 2024-07-22 16:41:24 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2024-07-23 17:02:32 +0300 |
| commit | 7cc86dee44a47d961fd6195fd91f75ce176b992d (patch) | |
| tree | 85db9984bd22e1a0fe1bd769f5386c6c6f0913b5 /arch/s390 | |
| parent | 4064b711127e1eb5b5fd42d539fd45e3e33c9b6f (diff) | |
| download | linux-7cc86dee44a47d961fd6195fd91f75ce176b992d.tar.xz | |
s390/entry: Make __switch_to() ready for lowcore relocation
In preparation of having lowcore at different address than zero,
add the base register to all lowcore accesses in __switch_to().
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/entry.S | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index ca58b3da3916..bbdbe3c3a770 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -169,13 +169,14 @@ SYM_FUNC_START(__switch_to_asm) stg %r15,__THREAD_ksp(%r1,%r2) # store kernel stack of prev lg %r15,0(%r4,%r3) # start of kernel stack of next agr %r15,%r5 # end of kernel stack of next - stg %r3,__LC_CURRENT # store task struct of next - stg %r15,__LC_KERNEL_STACK # store end of kernel stack + GET_LC %r13 + stg %r3,__LC_CURRENT(%r13) # store task struct of next + stg %r15,__LC_KERNEL_STACK(%r13) # store end of kernel stack lg %r15,__THREAD_ksp(%r1,%r3) # load kernel stack of next aghi %r3,__TASK_pid - mvc __LC_CURRENT_PID(4,%r0),0(%r3) # store pid of next + mvc __LC_CURRENT_PID(4,%r13),0(%r3) # store pid of next + ALTERNATIVE "nop", "lpp _LPP_OFFSET(%r13)", ALT_FACILITY(40) lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task - ALTERNATIVE "nop", "lpp _LPP_OFFSET", ALT_FACILITY(40) BR_EX %r14 SYM_FUNC_END(__switch_to_asm) |