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s390/kernel: add system calls for PCI memory access

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Add the new __NR_s390_pci_mmio_write and __NR_s390_pci_mmio_read
system calls to allow user space applications to access device PCI I/O
memory pages on s390x platform.

[ Martin Schwidefsky: some code beautification ]

Signed-off-by: Alexey Ishchuk <aishchuk@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Alexey Ishchuk
2014-11-14 14:27:58 +01:00
committed by Martin Schwidefsky
parent 86c558e8d3
commit 4eafad7feb
7 changed files with 127 additions and 2 deletions
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4
arch/s390/include/uapi/asm/unistd.h
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@@ -287,7 +287,9 @@
#define __NR_getrandom 349
#define __NR_memfd_create 350
#define __NR_bpf 351
#define NR_syscalls 352
#define __NR_s390_pci_mmio_write 352
#define __NR_s390_pci_mmio_read 353
#define NR_syscalls 354
/*
* There are some system calls that are not present on 64 bit, some