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| author | Alexey Ishchuk <aishchuk@linux.vnet.ibm.com> | 2014-11-14 14:27:58 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-11-19 09:46:43 +0100 |
| commit | 4eafad7febd482092b331ea72c37274d745956be (patch) | |
| tree | 81df1dd45ee04b56180da2214fae5a3bfe66ea2a /arch/s390/kernel | |
| parent | 86c558e8d3b774580faf8250092388d52cfde63e (diff) | |
| download | op-kernel-dev-4eafad7febd482092b331ea72c37274d745956be.zip op-kernel-dev-4eafad7febd482092b331ea72c37274d745956be.tar.gz | |
s390/kernel: add system calls for PCI memory access
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>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/compat_wrapper.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/syscalls.S | 2 |
3 files changed, 6 insertions, 0 deletions
diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c index c4f7a3d..d7fa2f0 100644 --- a/arch/s390/kernel/compat_wrapper.c +++ b/arch/s390/kernel/compat_wrapper.c @@ -218,3 +218,5 @@ COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags) COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags) COMPAT_SYSCALL_WRAP3(bpf, int, cmd, union bpf_attr *, attr, unsigned int, size); +COMPAT_SYSCALL_WRAP3(s390_pci_mmio_write, const unsigned long, mmio_addr, const void __user *, user_buffer, const size_t, length); +COMPAT_SYSCALL_WRAP3(s390_pci_mmio_read, const unsigned long, mmio_addr, void __user *, user_buffer, const size_t, length); diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h index 0554b97..8e61393 100644 --- a/arch/s390/kernel/entry.h +++ b/arch/s390/kernel/entry.h @@ -74,4 +74,6 @@ struct old_sigaction; long sys_s390_personality(unsigned int personality); long sys_s390_runtime_instr(int command, int signum); +long sys_s390_pci_mmio_write(unsigned long, const void __user *, size_t); +long sys_s390_pci_mmio_read(unsigned long, void __user *, size_t); #endif /* _ENTRY_H */ diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S index 9f7087f..a298724 100644 --- a/arch/s390/kernel/syscalls.S +++ b/arch/s390/kernel/syscalls.S @@ -360,3 +360,5 @@ SYSCALL(sys_seccomp,sys_seccomp,compat_sys_seccomp) SYSCALL(sys_getrandom,sys_getrandom,compat_sys_getrandom) SYSCALL(sys_memfd_create,sys_memfd_create,compat_sys_memfd_create) /* 350 */ SYSCALL(sys_bpf,sys_bpf,compat_sys_bpf) +SYSCALL(sys_ni_syscall,sys_s390_pci_mmio_write,compat_sys_s390_pci_mmio_write) +SYSCALL(sys_ni_syscall,sys_s390_pci_mmio_read,compat_sys_s390_pci_mmio_read) |
