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s390: enable processes for mio instructions
Allow for userspace to use PCI MIO instructions. Signed-off-by: Sebastian Ott <sebott@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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2 changed files with 12 additions and 0 deletions
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@ -143,4 +143,14 @@ static inline int zpci_set_irq_ctrl(u16 ctl, u8 isc)
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return __zpci_set_irq_ctrl(ctl, isc, &iib);
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}
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#ifdef CONFIG_PCI
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static inline void enable_mio_ctl(void)
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{
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if (static_branch_likely(&have_mio))
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__ctl_set_bit(2, 5);
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}
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#else /* CONFIG_PCI */
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static inline void enable_mio_ctl(void) {}
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#endif /* CONFIG_PCI */
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#endif
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@ -30,6 +30,7 @@
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#include <asm/sclp.h>
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#include <asm/facility.h>
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#include <asm/boot_data.h>
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#include <asm/pci_insn.h>
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#include "entry.h"
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/*
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@ -235,6 +236,7 @@ static __init void detect_machine_facilities(void)
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clock_comparator_max = -1ULL >> 1;
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__ctl_set_bit(0, 53);
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}
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enable_mio_ctl();
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}
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static inline void save_vector_registers(void)
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