kernel/git/stable/linux.git/arch/mips/include, branch linux-3.17.y

MIPS: r4kcache: Add EVA case for protected_writeback_dcache_line

2014-12-06T23:57:14+00:00

commit 83fd43449baaf88fe5c03dd0081a062041837c51 upstream. Commit de8974e3f76c0 ("MIPS: asm: r4kcache: Add EVA cache flushing functions") added cache function for EVA using the cachee instruction. However, it didn't add a case for the protected_writeback_dcache_line. mips_dsemul() calls r4k_flush_cache_sigtramp() which in turn uses the protected_writeback_dcache_line() to flush the trampoline code back to memory. This used the wrong "cache" instruction leading to random userland crashes on non-FPU cores. Signed-off-by: Markos Chandras Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8331/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman

MIPS: cpu-probe: Set the FTLB probability bit on supported cores

2014-12-06T23:57:13+00:00

commit cf0a8aa0226da5de88011e7f30eff22a894b2f49 upstream. Make use of the Config6/FLTBP bit to set the probability of a TLBWR instruction to hit the FTLB or the VTLB. A value of 0 (which may be the default value on certain cores, such as proAptiv or P5600) means that a TLBWR instruction will never hit the VTLB which leads to performance limitations since it effectively decreases the number of available TLB slots. Signed-off-by: Markos Chandras Reviewed-by: James Hogan Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8368/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman

MIPS: asm: uaccess: Add v1 register to clobber list on EVA

2014-12-06T23:57:13+00:00

commit 58563817cfed0432e9a54476d5fc6c3aeba475e4 upstream. When EVA is turned on and prefetching is being used in memcpy.S, the v1 register is being used as a helper register to the PREFE instruction. However, v1 ($3) was not in the clobber list, which means that the compiler did not preserve it across function calls, and that could corrupt the value of the register leading to all sorts of userland crashes. We fix this problem by using the DADDI_SCRATCH macro to define the clobbered register when CONFIG_EVA && CONFIG_CPU_HAS_PREFETCH are enabled. Signed-off-by: Markos Chandras Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8510/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman

MIPS: ftrace: Fix a microMIPS build problem

2014-11-14T18:10:29+00:00

commit aedd153f5bb5b1f1d6d9142014f521ae2ec294cc upstream. Code before the .fixup section needs to have the .insn directive. This has no side effects on MIPS32/64 but it affects the way microMIPS loads the address for the return label. Fixes the following build problem: mips-linux-gnu-ld: arch/mips/built-in.o: .fixup+0x4a0: Unsupported jump between ISA modes; consider recompiling with interlinking enabled. mips-linux-gnu-ld: final link failed: Bad value Makefile:819: recipe for target 'vmlinux' failed The fix is similar to 1658f914ff91c3bf ("MIPS: microMIPS: Disable LL/SC and fix linker bug.") Signed-off-by: Markos Chandras Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8117/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman

MIPS: ptrace.h: Add a missing include

2014-11-14T18:10:29+00:00

commit cdb685ad44996e9a113a10002cb42d40ff29db99 upstream. Commit a79ebea62010 (MIPS: ptrace: Fix user pt_regs definition, use in ptrace_{get, set}regs()) converted struct pt_regs to use __u64. Some userspace applications (e.g. GDB) include this file directly, and fail to see this type. Fix by including . The patch fixes the following build failure with GDB 7.8 when using GLIBC headers created against Linux 3.17: In file included from /home/aaro/los/work/shared/gdb-7.8/gdb/mips-linux-nat.c:37:0: /home/aaro/los/work/mips/rootfs/mips-linux-gnu/usr/include/asm/ptrace.h:32:2: error: unknown type name '__u64' __u64 regs[32]; ^ /home/aaro/los/work/mips/rootfs/mips-linux-gnu/usr/include/asm/ptrace.h:35:2: error: unknown type name '__u64' __u64 lo; ^ /home/aaro/los/work/mips/rootfs/mips-linux-gnu/usr/include/asm/ptrace.h:36:2: error: unknown type name '__u64' __u64 hi; ^ Fixes: a79ebea62010 ("MIPS: ptrace: Fix user pt_regs definition, use in ptrace_{get, set}regs()") Signed-off-by: Aaro Koskinen Cc: Alex Smith Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8067/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman

irq_work: Introduce arch_irq_work_has_interrupt()

2014-10-15T10:29:23+00:00

commit c5c38ef3d70377dc504a6a3f611a3ec814bc757b upstream. The nohz full code needs irq work to trigger its own interrupt so that the subsystem can work even when the tick is stopped. Lets introduce arch_irq_work_has_interrupt() that archs can override to tell about their support for this ability. Signed-off-by: Peter Zijlstra Cc: Ingo Molnar Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Frederic Weisbecker Signed-off-by: Greg Kroah-Hartman

MIPS: Move CPU topology macros to topology.h

2014-08-27T11:44:44+00:00

The correct position is topology.h, and this fix macros redefinition problems for Netlogic. [ralf@linux-mips.org: Fix build - the original patch broke most configurations.] Signed-off-by: Huacai Chen Cc: Jayachandran C. Cc: John Crispin Cc: Steven J. Hill Cc: Aurelien Jarno Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang Cc: Zhangjin Wu Patchwork: https://patchwork.linux-mips.org/patch/7575/ Signed-off-by: Ralf Baechle

MIPS: Wire up new syscalls getrandom and memfd_create.

2014-08-26T01:03:40+00:00

Signed-off-by: Ralf Baechle

MIPS: Fix a warning for virt_to_page

2014-08-26T00:27:47+00:00

Compiling mm/highmem.c gives a warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast Fixed by casting to void* Signed-off-by: Zubair Lutfullah Kakakhel Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7337/ Signed-off-by: Ralf Baechle

MIPS: COP2: CPP macro safety fixes.

2014-08-26T00:18:59+00:00

- Don't pass things to macros that couldn't be dereferences if that macro was actually a function. - Don't use empty function-like macros. Signed-off-by: Ralf Baechle