From 833b441ec0f6f3c57cc2106ef628bb19d8fb0ee2 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 23 Apr 2019 13:14:28 +0200 Subject: s390: enable processes for mio instructions Allow for userspace to use PCI MIO instructions. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/pci_insn.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/s390/include/asm/pci_insn.h') diff --git a/arch/s390/include/asm/pci_insn.h b/arch/s390/include/asm/pci_insn.h index 61cf9531f68f..ff81ed19c506 100644 --- a/arch/s390/include/asm/pci_insn.h +++ b/arch/s390/include/asm/pci_insn.h @@ -143,4 +143,14 @@ static inline int zpci_set_irq_ctrl(u16 ctl, u8 isc) return __zpci_set_irq_ctrl(ctl, isc, &iib); } +#ifdef CONFIG_PCI +static inline void enable_mio_ctl(void) +{ + if (static_branch_likely(&have_mio)) + __ctl_set_bit(2, 5); +} +#else /* CONFIG_PCI */ +static inline void enable_mio_ctl(void) {} +#endif /* CONFIG_PCI */ + #endif -- cgit v1.2.3