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s390: add support for vector extension

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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>
This commit is contained in:
Martin Schwidefsky
2014-10-06 17:53:53 +02:00
parent 42f4dd613f
commit 8070361799
22 changed files with 855 additions and 238 deletions
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9
arch/s390/kernel/setup.c
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@@ -343,6 +343,9 @@ static void __init setup_lowcore(void)
__ctl_set_bit(14, 29);
}
#else
if (MACHINE_HAS_VX)
lc->vector_save_area_addr =
(unsigned long) &lc->vector_save_area;
lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0];
#endif
lc->sync_enter_timer = S390_lowcore.sync_enter_timer;
@@ -765,6 +768,12 @@ static void __init setup_hwcaps(void)
*/
if (test_facility(50) && test_facility(73))
elf_hwcap |= HWCAP_S390_TE;
/*
* Vector extension HWCAP_S390_VXRS is bit 11.
*/
if (test_facility(129))
elf_hwcap |= HWCAP_S390_VXRS;
#endif
get_cpu_id(&cpu_id);