[Qemu-devel] [PATCH 12/21] userfaultfd: activate syscall

[Andrea Arcangeli]

This activates the userfaultfd syscall.

Signed-off-by: Andrea Arcangeli <address@hidden>
---
 arch/powerpc/include/asm/systbl.h      | 1 +
 arch/powerpc/include/asm/unistd.h      | 2 +-
 arch/powerpc/include/uapi/asm/unistd.h | 1 +
 arch/x86/syscalls/syscall_32.tbl       | 1 +
 arch/x86/syscalls/syscall_64.tbl       | 1 +
 include/linux/syscalls.h               | 1 +
 kernel/sys_ni.c                        | 1 +
 7 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/systbl.h 
b/arch/powerpc/include/asm/systbl.h
index 91062ee..7f21cfd 100644
--- a/arch/powerpc/include/asm/systbl.h
+++ b/arch/powerpc/include/asm/systbl.h
@@ -367,3 +367,4 @@ SYSCALL_SPU(getrandom)
 SYSCALL_SPU(memfd_create)
 SYSCALL_SPU(bpf)
 COMPAT_SYS(execveat)
+SYSCALL_SPU(userfaultfd)
diff --git a/arch/powerpc/include/asm/unistd.h 
b/arch/powerpc/include/asm/unistd.h
index 36b79c3..f4f8b66 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -12,7 +12,7 @@
 #include <uapi/asm/unistd.h>
 
 
-#define __NR_syscalls          363
+#define __NR_syscalls          364
 
 #define __NR__exit __NR_exit
 #define NR_syscalls    __NR_syscalls
diff --git a/arch/powerpc/include/uapi/asm/unistd.h 
b/arch/powerpc/include/uapi/asm/unistd.h
index ef5b5b1..4b4f21e 100644
--- a/arch/powerpc/include/uapi/asm/unistd.h
+++ b/arch/powerpc/include/uapi/asm/unistd.h
@@ -385,5 +385,6 @@
 #define __NR_memfd_create      360
 #define __NR_bpf               361
 #define __NR_execveat          362
+#define __NR_userfaultfd       363
 
 #endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */
diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index b3560ec..a20f0b8 100644
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -365,3 +365,4 @@
 356    i386    memfd_create            sys_memfd_create
 357    i386    bpf                     sys_bpf
 358    i386    execveat                sys_execveat                    
stub32_execveat
+359    i386    userfaultfd             sys_userfaultfd
diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
index 8d656fb..f320b19 100644
--- a/arch/x86/syscalls/syscall_64.tbl
+++ b/arch/x86/syscalls/syscall_64.tbl
@@ -329,6 +329,7 @@
 320    common  kexec_file_load         sys_kexec_file_load
 321    common  bpf                     sys_bpf
 322    64      execveat                stub_execveat
+323    common  userfaultfd             sys_userfaultfd
 
 #
 # x32-specific system call numbers start at 512 to avoid cache impact
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 76d1e38..adf5901 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -810,6 +810,7 @@ asmlinkage long sys_timerfd_gettime(int ufd, struct 
itimerspec __user *otmr);
 asmlinkage long sys_eventfd(unsigned int count);
 asmlinkage long sys_eventfd2(unsigned int count, int flags);
 asmlinkage long sys_memfd_create(const char __user *uname_ptr, unsigned int 
flags);
+asmlinkage long sys_userfaultfd(int flags);
 asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len);
 asmlinkage long sys_old_readdir(unsigned int, struct old_linux_dirent __user 
*, unsigned int);
 asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *,
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 5adcb0a..2a10e42 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -204,6 +204,7 @@ cond_syscall(compat_sys_timerfd_gettime);
 cond_syscall(sys_eventfd);
 cond_syscall(sys_eventfd2);
 cond_syscall(sys_memfd_create);
+cond_syscall(sys_userfaultfd);
 
 /* performance counters: */
 cond_syscall(sys_perf_event_open);