BMC/Intel-BMC/linux.git/arch/powerpc/include/asm/systbl.h, branch dev

powerpc: Enable sys_kcmp() for CRIU

2015-05-20T00:42:05+00:00

The commit 8170a83f15ee ("powerpc: Wireup the kcmp syscall to sys_ni") has disabled the kcmp syscall for powerpc. This has been done due to the use of unsigned long parameters which may require a dedicated wrapper to handle 32bit process on top of 64bit kernel. However in the kcmp() case, the 2 unsigned long parameters are currently only used to carry file descriptors from user space to the kernel. Since such a parameter is passed through register, and file descriptor doesn't need to get extended, there is, today, no need for a wrapper. In the case there will be a need to pass address in or out of this system call, then a wrapper could be required, it will then be to care of it. As today this is not the case, it is safe to enable kcmp() on powerpc. Tested (by Laurent) on 64-bit, 32-bit, and 32-bit userspace on 64-bit kernel using tools/testing/selftests/kcmp [mpe]. Signed-off-by: Laurent Dufour Signed-off-by: Michael Ellerman

powerpc: Add a proper syscall for switching endianness

2015-03-28T11:03:40+00:00

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

powerpc: Wire up sys_execveat() syscall

2014-12-29T04:44:53+00:00

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 Signed-off-by: Michael Ellerman

powerpc: Wire up sys_bpf() syscall

2014-10-22T03:03:06+00:00

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 [mpe: test using samples/bpf] Signed-off-by: Michael Ellerman

powerpc: Wire up sys_seccomp(), sys_getrandom() and sys_memfd_create()

2014-09-09T09:02:47+00:00

This patch wires up three new syscalls for powerpc. The three new syscalls are seccomp, getrandom and memfd_create. Signed-off-by: Pranith Kumar Reviewed-by: David Herrmann

powerpc: Use standard macros for sys_sigpending() & sys_old_getrlimit()

2014-07-28T04:09:23+00:00

Currently we have sys_sigpending and sys_old_getrlimit defined to use COMPAT_SYS() in systbl.h, but then both are #defined to sys_ni_syscall in systbl.S. This seems to have been done when ppc and ppc64 were merged, in commit 9994a33 "Introduce entry_{32,64}.S, misc_{32,64}.S, systbl.S". AFAICS there's no longer (or never was) any need for this, we can just use SYSX() for both and remove the #defines to sys_ni_syscall. The expansion before was: #define COMPAT_SYS(func) .llong .sys_##func,.compat_sys_##func #define sys_old_getrlimit sys_ni_syscall COMPAT_SYS(old_getrlimit) => .llong .sys_old_getrlimit,.compat_sys_old_getrlimit => .llong .sys_ni_syscall,.compat_sys_old_getrlimit After is: #define SYSX(f, f3264, f32) .llong .f,.f3264 SYSX(sys_ni_syscall, compat_sys_old_getrlimit, sys_old_getrlimit) => .llong .sys_ni_syscall,.compat_sys_old_getrlimit ie. they are equivalent. Finally both COMPAT_SYS() and SYSX() evaluate to sys_ni_syscall in the Cell SPU code. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2014-06-11T01:54:22+00:00

Pull powerpc updates from Ben Herrenschmidt: "Here is the bulk of the powerpc changes for this merge window. It got a bit delayed in part because I wasn't paying attention, and in part because I discovered I had a core PCI change without a PCI maintainer ack in it. Bjorn eventually agreed it was ok to merge it though we'll probably improve it later and I didn't want to rebase to add his ack. There is going to be a bit more next week, essentially fixes that I still want to sort through and test. The biggest item this time is the support to build the ppc64 LE kernel with our new v2 ABI. We previously supported v2 userspace but the kernel itself was a tougher nut to crack. This is now sorted mostly thanks to Anton and Rusty. We also have a fairly big series from Cedric that add support for 64-bit LE zImage boot wrapper. This was made harder by the fact that traditionally our zImage wrapper was always 32-bit, but our new LE toolchains don't really support 32-bit anymore (it's somewhat there but not really "supported") so we didn't want to rely on it. This meant more churn that just endian fixes. This brings some more LE bits as well, such as the ability to run in LE mode without a hypervisor (ie. under OPAL firmware) by doing the right OPAL call to reinitialize the CPU to take HV interrupts in the right mode and the usual pile of endian fixes. There's another series from Gavin adding EEH improvements (one day we *will* have a release with less than 20 EEH patches, I promise!). Another highlight is the support for the "Split core" functionality on P8 by Michael. This allows a P8 core to be split into "sub cores" of 4 threads which allows the subcores to run different guests under KVM (the HW still doesn't support a partition per thread). And then the usual misc bits and fixes ..." [ Further delayed by gmail deciding that BenH is a dirty spammer. Google knows. ] * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (155 commits) powerpc/powernv: Add missing include to LPC code selftests/powerpc: Test the THP bug we fixed in the previous commit powerpc/mm: Check paca psize is up to date for huge mappings powerpc/powernv: Pass buffer size to OPAL validate flash call powerpc/pseries: hcall functions are exported to modules, need _GLOBAL_TOC() powerpc: Exported functions __clear_user and copy_page use r2 so need _GLOBAL_TOC() powerpc/powernv: Set memory_block_size_bytes to 256MB powerpc: Allow ppc_md platform hook to override memory_block_size_bytes powerpc/powernv: Fix endian issues in memory error handling code powerpc/eeh: Skip eeh sysfs when eeh is disabled powerpc: 64bit sendfile is capped at 2GB powerpc/powernv: Provide debugfs access to the LPC bus via OPAL powerpc/serial: Use saner flags when creating legacy ports powerpc: Add cpu family documentation powerpc/xmon: Fix up xmon format strings powerpc/powernv: Add calls to support little endian host powerpc: Document sysfs DSCR interface powerpc: Fix regression of per-CPU DSCR setting powerpc: Split __SYSFS_SPRSETUP macro arch: powerpc/fadump: Cleaning up inconsistent NULL checks ...

powerpc: 64bit sendfile is capped at 2GB

2014-06-05T03:20:38+00:00

commit 8f9c0119d7ba (compat: fs: Generic compat_sys_sendfile implementation) changed the PowerPC 64bit sendfile call from sys_sendile64 to sys_sendfile. Unfortunately this broke sendfile of lengths greater than 2G because sys_sendfile caps at MAX_NON_LFS. Restore what we had previously which fixes the bug. Cc: stable@vger.kernel.org Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt

powerpc: Wire renameat2() syscall

2014-06-01T23:24:27+00:00

Signed-off-by: Benjamin Herrenschmidt

powerpc: Create DOTSYM to wrap dot symbol usage

2014-04-23T00:05:19+00:00

There are a few places we have to use dot symbols with the current ABI - the syscall table and the kvm hcall table. Wrap both of these with a new macro called DOTSYM so it will be easy to transition away from dot symbols in a future ABI. Signed-off-by: Anton Blanchard