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Subject[RFC 4/9] Popcorn system call additions
Date
The Popcorn system calls are a core component of
Popcorn Linux. All system calls have been added
to kernel/sched/core.c

The main system call is popcorn_migrate. User
applications may invoke this system call to trigger
a migration from their origin node to a remote
node; and vice-versa. The system call relies on
several "server modules" (process server, vma server,
page server) to perform the migration and maintain
VMA coherency. A message layer for IPC has been
also added to communicate Popcorn messages across
the distributed threads. You may find a basic
example of the system call at the Popcorn kernel
library. All three system calls are showcased in the
Popcorn kernel library.
---
arch/x86/entry/syscalls/syscall_64.tbl | 3 +++
include/linux/syscalls.h | 9 +++++++++
include/uapi/asm-generic/unistd.h | 11 +++++++++--
3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index b4e6f9e62..5f8aff57e 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -355,6 +355,9 @@
431 common fsconfig __x64_sys_fsconfig
432 common fsmount __x64_sys_fsmount
433 common fspick __x64_sys_fspick
+434 64 popcorn_migrate __x64_sys_popcorn_migrate
+435 64 popcorn_get_thread_status __x64_sys_popcorn_get_thread_status
+436 64 popcorn_get_node_info __x64_sys_popcorn_get_node_info

#
# 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 2bcef4c70..e8e4430d5 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1250,6 +1250,15 @@ ssize_t ksys_pread64(unsigned int fd, char __user *buf, size_t count,
ssize_t ksys_pwrite64(unsigned int fd, const char __user *buf,
size_t count, loff_t pos);
int ksys_fallocate(int fd, int mode, loff_t offset, loff_t len);
+#ifdef CONFIG_POPCORN
+long ksys_brk(unsigned long brk);
+long ksys_mremap(unsigned long addr,
+ unsigned long old_len, unsigned long new_len,
+ unsigned long flags, unsigned long new_addr);
+long ksys_madvise(unsigned long start, size_t len, int behavior);
+long ksys_mprotect(unsigned long start, size_t len,
+ unsigned long prot);
+#endif
#ifdef CONFIG_ADVISE_SYSCALLS
int ksys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice);
#else
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index a87904daf..71a526a1b 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -844,9 +844,16 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig)
__SYSCALL(__NR_fsmount, sys_fsmount)
#define __NR_fspick 433
__SYSCALL(__NR_fspick, sys_fspick)
-
+#ifdef CONFIG_POPCORN
+#define __NR_popcorn_migrate 434
+__SYSCALL(__NR_popcorn_migrate, sys_popcorn_migrate)
+#define __NR_popcorn_get_thread_status 435
+__SYSCALL(__NR_popcorn_get_thread_status, sys_popcorn_get_thread_status)
+#define __NR_popcorn_get_node_info 436
+__SYSCALL(__NR_popcorn_get_node_info, sys_popcorn_get_node_info)
+#endif
#undef __NR_syscalls
-#define __NR_syscalls 434
+#define __NR_syscalls 437

/*
* 32 bit systems traditionally used different
--
2.17.1
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