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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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kernel/sys_ni.c
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@@ -169,6 +169,8 @@ cond_syscall(ppc_rtas);
cond_syscall(sys_spu_run);
cond_syscall(sys_spu_create);
cond_syscall(sys_subpage_prot);
cond_syscall(sys_s390_pci_mmio_read);
cond_syscall(sys_s390_pci_mmio_write);
/* mmu depending weak syscall entries */
cond_syscall(sys_mprotect);