From: Alison Schofield <alison.schofield@xxxxxxxxx> encrypt_mprotect() is a new system call to support memory encryption. It takes the same parameters as legacy mprotect, plus an additional key serial number that is mapped to an encryption keyid. Signed-off-by: Alison Schofield <alison.schofield@xxxxxxxxx> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> --- arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + include/linux/syscalls.h | 2 ++ include/uapi/asm-generic/unistd.h | 4 +++- kernel/sys_ni.c | 2 ++ 5 files changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index 1f9607ed087c..dbcd4c28d743 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -433,3 +433,4 @@ 425 i386 io_uring_setup sys_io_uring_setup __ia32_sys_io_uring_setup 426 i386 io_uring_enter sys_io_uring_enter __ia32_sys_io_uring_enter 427 i386 io_uring_register sys_io_uring_register __ia32_sys_io_uring_register +428 i386 encrypt_mprotect sys_encrypt_mprotect __ia32_sys_encrypt_mprotect diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 92ee0b4378d4..d01bd132e9ee 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -349,6 +349,7 @@ 425 common io_uring_setup __x64_sys_io_uring_setup 426 common io_uring_enter __x64_sys_io_uring_enter 427 common io_uring_register __x64_sys_io_uring_register +428 common encrypt_mprotect __x64_sys_encrypt_mprotect # # 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 e446806a561f..38a2d7b95397 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -988,6 +988,8 @@ asmlinkage long sys_rseq(struct rseq __user *rseq, uint32_t rseq_len, asmlinkage long sys_pidfd_send_signal(int pidfd, int sig, siginfo_t __user *info, unsigned int flags); +asmlinkage long sys_encrypt_mprotect(unsigned long start, size_t len, + unsigned long prot, key_serial_t serial); /* * Architecture-specific system calls diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index dee7292e1df6..86f942f54b1b 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -832,9 +832,11 @@ __SYSCALL(__NR_io_uring_setup, sys_io_uring_setup) __SYSCALL(__NR_io_uring_enter, sys_io_uring_enter) #define __NR_io_uring_register 427 __SYSCALL(__NR_io_uring_register, sys_io_uring_register) +#define __NR_encrypt_mprotect 428 +__SYSCALL(__NR_encrypt_mprotect, sys_encrypt_mprotect) #undef __NR_syscalls -#define __NR_syscalls 428 +#define __NR_syscalls 429 /* * 32 bit systems traditionally used different diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index d21f4befaea4..80da8d9ac8b1 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c @@ -350,6 +350,8 @@ COND_SYSCALL(pkey_mprotect); COND_SYSCALL(pkey_alloc); COND_SYSCALL(pkey_free); +/* multi-key total memory encryption keys */ +COND_SYSCALL(encrypt_mprotect); /* * Architecture specific weak syscall entries. -- 2.20.1
