Wire up the rseq system call on powerpc.
This provides an ABI improving the speed of a user-space getcpu
operation on powerpc by skipping the getcpu system call on the fast
path, as well as improving the speed of user-space operations on per-cpu
data compared to using load-reservation/store-conditional atomics.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Watson <davejwatson@fb.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Chris Lameter <cl@linux.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Andrew Hunter <ahh@google.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Paul Turner <pjt@google.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ben Maurer <bmaurer@fb.com>
Cc: linux-api@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20180602124408.8430-11-mathieu.desnoyers@efficios.com
Patch provides the ability for a process to
associate a pkey with a address range.
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Finally this patch provides the ability for a process to
allocate and free a protection key.
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Test runs on a ppc64 BE guest succeeded. linux/samples/statx/test-statx
program was executed on the following file types,
1. Regular file
2. Directory
3. device file
4. symlink
5. Named pipe
The test run also included invoking test-statx with the runtime options
provided in the main() function of test-statx.c
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Define the Kconfig symbol so that the kexec_file_load() code can be
built, and wire up the syscall so that it can be called.
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Wire up preadv2/pwritev2 in the same way as preadv/pwritev. Fixes two
build warnings on ppc64.
mpe: Lightly tested with fio (slightly hacked to add the syscall
wrappers):
fio-4217 [009] .... 1304.635300: sys_preadv2(fd: 3, vec:
10025821de0, vlen: 1, pos_l: 6253000, pos_h: 0, flags: 1)
fio-4217 [009] .... 1304.635474: sys_preadv2 -> 0x1000
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Test runs on a ppc64 BE guest succeeded using modified fstests.
Also tested on ppc64 LE using a home made test - mpe.
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This partially reverts commit a34236155a.
While reviewing the glibc patch to exploit the individual IPC calls,
Arnd & Andreas noticed that we were still requiring userspace to pass
IPC_64 in order to get the new style IPC API.
With a bit of cleanup in the kernel we can drop that requirement, and
instead only provide the new style API, which will simplify things for
userspace.
Rather than try and sneak that patch into 4.4, instead we will drop the
individual IPC calls for powerpc, and merge them again in 4.5 once the
cleanup patch has gone in.
Because we've already added sys_mlock2() as syscall #378, we don't do a
full revert of the IPC calls. Instead we drop the __NR #defines, and
send those now undefined syscall numbers to sys_ni_syscall(). This
leaves a gap in the syscall numbers, but we'll reuse them when we merge
the individual IPC calls.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
This patch provides individual system call numbers for the following
System V IPC system calls, on PowerPC, so that they do not need to be
multiplexed:
* semop, semget, semctl, semtimedop
* msgsnd, msgrcv, msgget, msgctl
* shmat, shmdt, shmget, shmctl
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We currently have a "special" syscall for switching endianness. This is
syscall number 0x1ebe, which is handled explicitly in the 64-bit syscall
exception entry.
That has a few problems, firstly the syscall number is outside of the
usual range, which confuses various tools. For example strace doesn't
recognise the syscall at all.
Secondly it's handled explicitly as a special case in the syscall
exception entry, which is complicated enough without it.
As a first step toward removing the special syscall, we need to add a
regular syscall that implements the same functionality.
The logic is simple, it simply toggles the MSR_LE bit in the userspace
MSR. This is the same as the special syscall, with the caveat that the
special syscall clobbers fewer registers.
This version clobbers r9-r12, XER, CTR, and CR0-1,5-7.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Wire up sys_execveat(). This passes the selftests for the system call.
Check success of execveat(3, '../execveat', 0)... [OK]
Check success of execveat(5, 'execveat', 0)... [OK]
Check success of execveat(6, 'execveat', 0)... [OK]
Check success of execveat(-100, '/home/pranith/linux/...ftests/exec/execveat', 0)... [OK]
Check success of execveat(99, '/home/pranith/linux/...ftests/exec/execveat', 0)... [OK]
Check success of execveat(8, '', 4096)... [OK]
Check success of execveat(17, '', 4096)... [OK]
Check success of execveat(9, '', 4096)... [OK]
Check success of execveat(14, '', 4096)... [OK]
Check success of execveat(14, '', 4096)... [OK]
Check success of execveat(15, '', 4096)... [OK]
Check failure of execveat(8, '', 0) with ENOENT... [OK]
Check failure of execveat(8, '(null)', 4096) with EFAULT... [OK]
Check success of execveat(5, 'execveat.symlink', 0)... [OK]
Check success of execveat(6, 'execveat.symlink', 0)... [OK]
Check success of execveat(-100, '/home/pranith/linux/...xec/execveat.symlink', 0)... [OK]
Check success of execveat(10, '', 4096)... [OK]
Check success of execveat(10, '', 4352)... [OK]
Check failure of execveat(5, 'execveat.symlink', 256) with ELOOP... [OK]
Check failure of execveat(6, 'execveat.symlink', 256) with ELOOP... [OK]
Check failure of execveat(-100, '/home/pranith/linux/tools/testing/selftests/exec/execveat.symlink', 256) with ELOOP... [OK]
Check success of execveat(3, '../script', 0)... [OK]
Check success of execveat(5, 'script', 0)... [OK]
Check success of execveat(6, 'script', 0)... [OK]
Check success of execveat(-100, '/home/pranith/linux/...elftests/exec/script', 0)... [OK]
Check success of execveat(13, '', 4096)... [OK]
Check success of execveat(13, '', 4352)... [OK]
Check failure of execveat(18, '', 4096) with ENOENT... [OK]
Check failure of execveat(7, 'script', 0) with ENOENT... [OK]
Check success of execveat(16, '', 4096)... [OK]
Check success of execveat(16, '', 4096)... [OK]
Check success of execveat(4, '../script', 0)... [OK]
Check success of execveat(4, 'script', 0)... [OK]
Check success of execveat(4, '../script', 0)... [OK]
Check failure of execveat(4, 'script', 0) with ENOENT... [OK]
Check failure of execveat(5, 'execveat', 65535) with EINVAL... [OK]
Check failure of execveat(5, 'no-such-file', 0) with ENOENT... [OK]
Check failure of execveat(6, 'no-such-file', 0) with ENOENT... [OK]
Check failure of execveat(-100, 'no-such-file', 0) with ENOENT... [OK]
Check failure of execveat(5, '', 4096) with EACCES... [OK]
Check failure of execveat(5, 'Makefile', 0) with EACCES... [OK]
Check failure of execveat(11, '', 4096) with EACCES... [OK]
Check failure of execveat(12, '', 4096) with EACCES... [OK]
Check failure of execveat(99, '', 4096) with EBADF... [OK]
Check failure of execveat(99, 'execveat', 0) with EBADF... [OK]
Check failure of execveat(8, 'execveat', 0) with ENOTDIR... [OK]
Invoke copy of 'execveat' via filename of length 4093:
Check success of execveat(19, '', 4096)... [OK]
Check success of execveat(5, 'xxxxxxxxxxxxxxxxxxxx...yyyyyyyyyyyyyyyyyyyy', 0)... [OK]
Invoke copy of 'script' via filename of length 4093:
Check success of execveat(20, '', 4096)... [OK]
/bin/sh: 0: Can't open /dev/fd/5/xxxxxxx(... a long line of x's and y's, 0)... [OK]
Check success of execveat(5, 'xxxxxxxxxxxxxxxxxxxx...yyyyyyyyyyyyyyyyyyyy', 0)... [OK]
Tested on a 32-bit powerpc system.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This patch wires up the new syscall sys_bpf() on powerpc.
Passes the tests in samples/bpf:
#0 add+sub+mul OK
#1 unreachable OK
#2 unreachable2 OK
#3 out of range jump OK
#4 out of range jump2 OK
#5 test1 ld_imm64 OK
#6 test2 ld_imm64 OK
#7 test3 ld_imm64 OK
#8 test4 ld_imm64 OK
#9 test5 ld_imm64 OK
#10 no bpf_exit OK
#11 loop (back-edge) OK
#12 loop2 (back-edge) OK
#13 conditional loop OK
#14 read uninitialized register OK
#15 read invalid register OK
#16 program doesn't init R0 before exit OK
#17 stack out of bounds OK
#18 invalid call insn1 OK
#19 invalid call insn2 OK
#20 invalid function call OK
#21 uninitialized stack1 OK
#22 uninitialized stack2 OK
#23 check valid spill/fill OK
#24 check corrupted spill/fill OK
#25 invalid src register in STX OK
#26 invalid dst register in STX OK
#27 invalid dst register in ST OK
#28 invalid src register in LDX OK
#29 invalid dst register in LDX OK
#30 junk insn OK
#31 junk insn2 OK
#32 junk insn3 OK
#33 junk insn4 OK
#34 junk insn5 OK
#35 misaligned read from stack OK
#36 invalid map_fd for function call OK
#37 don't check return value before access OK
#38 access memory with incorrect alignment OK
#39 sometimes access memory with incorrect alignment OK
#40 jump test 1 OK
#41 jump test 2 OK
#42 jump test 3 OK
#43 jump test 4 OK
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
[mpe: test using samples/bpf]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This patch wires up three new syscalls for powerpc. The three
new syscalls are seccomp, getrandom and memfd_create.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Since kmp takes 2 unsigned long args there should be a compat wrapper.
Since one isn't provided I think it's safer just to hook this up to not
implemented. If we need it later we can do it properly then.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
(This is just for Acks: this won't work without the actual syscall patches,
sitting in my tree for -next at the moment).
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
Boqun Feng