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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-10-06 17:53:53 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-10-09 09:14:13 +0200 |
| commit | 8070361799ae1e3f4ef347bd10f0a508ac10acfb (patch) | |
| tree | 9846c0633cd28a86dc62eca55a4268fed513fcfd /arch/s390/kernel/smp.c | |
| parent | 42f4dd613fe808676126472bbe1283e452201148 (diff) | |
| download | op-kernel-dev-8070361799ae1e3f4ef347bd10f0a508ac10acfb.zip op-kernel-dev-8070361799ae1e3f4ef347bd10f0a508ac10acfb.tar.gz | |
s390: add support for vector extension
The vector extension introduces 32 128-bit vector registers and a set of
instruction to operate on the vector registers.
The kernel can control the use of vector registers for the problem state
program with a bit in control register 0. Once enabled for a process the
kernel needs to retain the content of the vector registers on context
switch. The signal frame is extended to include the vector registers.
Two new register sets NT_S390_VXRS_LOW and NT_S390_VXRS_HIGH are added
to the regset interface for the debugger and core dumps.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index bba0e246..13cae5b 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -179,6 +179,9 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu) goto out; } #else + if (MACHINE_HAS_VX) + lc->vector_save_area_addr = + (unsigned long) &lc->vector_save_area; if (vdso_alloc_per_cpu(lc)) goto out; #endif |
