From 8070361799ae1e3f4ef347bd10f0a508ac10acfb Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Mon, 6 Oct 2014 17:53:53 +0200 Subject: 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 --- arch/s390/kernel/setup.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/s390/kernel/setup.c') diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index cdfc060..e80d9ff 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -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); -- cgit v1.1