linux-toradex.git/arch/riscv/kernel, branch v5.0

Revert "RISC-V: Make BSS section as the last section in vmlinux.lds.S"

2019-02-11T23:24:45+00:00

At least BBL relies on the flat binaries containing all the bytes in the
actual image to exist in the file.  Before this revert the flat images
dropped the trailing zeros, which caused BBL to put its copy of the
device tree where Linux thought the BSS was, which wreaks all sorts of
havoc.  Manifesting the bug is a bit subtle because BBL aligns
everything to 2MiB page boundaries, but with large enough kernels you're
almost certain to get bitten by the bug.

While moving the sections around isn't a great long-term fix, it will at
least avoid producing broken images.

This reverts commit 22e6a2e14cb8ebcae059488cf24e778e4058c2bf.

Signed-off-by: Palmer Dabbelt 
Reviewed-by: Christoph Hellwig

riscv: fixup max_low_pfn with PFN_DOWN.

2019-01-24T01:51:53+00:00

max_low_pfn should be pfn_size not byte_size.

Signed-off-by: Guo Ren 
Signed-off-by: Mao Han 
Signed-off-by: Palmer Dabbelt

RISC-V: fix bad use of of_node_put

2019-01-23T20:56:19+00:00

of_find_node_by_type already calls of_node_put, don't call it again.

Fixes: 94f9bf118f ("RISC-V: Fix of_node_* refcount")
Signed-off-by: Andreas Schwab 
Reviewed-by: Atish Patra 
Signed-off-by: Palmer Dabbelt

RISC-V: Add _TIF_NEED_RESCHED check for kernel thread when CONFIG_PREEMPT=y

2019-01-23T20:56:19+00:00

The cond_resched() can be used to yield the CPU resource if
CONFIG_PREEMPT is not defined. Otherwise, cond_resched() is a dummy
function. In order to avoid kernel thread occupying entire CPU,
when CONFIG_PREEMPT=y, the kernel thread needs to follow the
rescheduling mechanism like a user thread.

Signed-off-by: Vincent Chen 
Tested-by: Guenter Roeck 
Signed-off-by: Palmer Dabbelt

Fix a handful of audit-related issue

2019-01-07T16:45:47+00:00

This is sort of a mix between a new feature and a bug fix.  I've managed
to screw up merging this patch set a handful of times but I think it's
OK this time around.  The main new feature here is audit support for
RISC-V, with some fixes to audit-related bugs that cropped up along the
way:

* The addition of NR_syscalls into unistd.h, which is necessary for
  CONFIG_FTRACE_SYSCALLS.
* The definition of CREATE_TRACE_POINTS so
  __tracepoint_sys_{enter,exit} get defined.
* A fix for trace_sys_exit() so we can enable
  CONFIG_HAVE_SYSCALL_TRACEPOINTS.

riscv: fix trace_sys_exit hook

2019-01-07T16:22:43+00:00

Fix compilation error.

Signed-off-by: David Abdurachmanov 
Signed-off-by: Palmer Dabbelt

riscv: define CREATE_TRACE_POINTS in ptrace.c

2019-01-07T16:22:42+00:00

Define CREATE_TRACE_POINTS in order to create functions and structures
for the trace events. This is needed if HAVE_SYSCALL_TRACEPOINTS and
CONFIG_FTRACE_SYSCALLS are enabled, otherwise we get linking errors:

[..]
  MODPOST vmlinux.o
kernel/trace/trace_syscalls.o: In function `.L0 ':
trace_syscalls.c:(.text+0x1152): undefined reference to `__tracepoint_sys_enter'
trace_syscalls.c:(.text+0x126c): undefined reference to `__tracepoint_sys_enter'
trace_syscalls.c:(.text+0x1328): undefined reference to `__tracepoint_sys_enter'
trace_syscalls.c:(.text+0x14aa): undefined reference to `__tracepoint_sys_enter'
trace_syscalls.c:(.text+0x1684): undefined reference to `__tracepoint_sys_exit'
trace_syscalls.c:(.text+0x17a0): undefined reference to `__tracepoint_sys_exit'
trace_syscalls.c:(.text+0x185c): undefined reference to `__tracepoint_sys_exit'
trace_syscalls.c:(.text+0x19de): undefined reference to `__tracepoint_sys_exit'
arch/riscv/kernel/ptrace.o: In function `.L0 ':
ptrace.c:(.text+0x4dc): undefined reference to `__tracepoint_sys_enter'
ptrace.c:(.text+0x632): undefined reference to `__tracepoint_sys_exit'
make: *** [Makefile:1036: vmlinux] Error 1

Signed-off-by: David Abdurachmanov 
Fixes: b78002b395b4 ("riscv: add HAVE_SYSCALL_TRACEPOINTS to Kconfig")
Signed-off-by: Palmer Dabbelt

riscv: audit: add audit hook in do_syscall_trace_enter/exit()

2019-01-07T16:22:40+00:00

This patch adds auditing functions on entry to and exit from every system
call invocation.

Signed-off-by: David Abdurachmanov 
Signed-off-by: Palmer Dabbelt

riscv: add audit support

2019-01-07T16:22:39+00:00

On RISC-V (riscv) audit is supported through generic lib/audit.c.
The patch adds required arch specific definitions.

Signed-off-by: David Abdurachmanov 
Signed-off-by: Palmer Dabbelt

RISC-V: Support MODULE_SECTIONS mechanism on RV32

2019-01-07T16:19:20+00:00

This patch supports dynamic generate got and plt sections mechanism on
rv32. It contains the modification as follows:
 - Always enable MODULE_SECTIONS (both rv64 and rv32)
 - Change the fixed size type.

This patch had been tested by following modules:

btrfs 6795991 0 - Live 0xa544b000
test_static_keys 17304 0 - Live 0xa28be000
zstd_compress 1198986 1 btrfs, Live 0xa2a25000
zstd_decompress 608112 1 btrfs, Live 0xa24e7000
lzo 8787 0 - Live 0xa2049000
xor 27461 1 btrfs, Live 0xa2041000
zram 78849 0 - Live 0xa2276000
netdevsim 55909 0 - Live 0xa202d000
tun 211534 0 - Live 0xa21b5000
fuse 566049 0 - Live 0xa25fb000
nfs_layout_flexfiles 192597 0 - Live 0xa229b000
ramoops 74895 0 - Live 0xa2019000
xfs 3973221 0 - Live 0xa507f000
libcrc32c 3053 2 btrfs,xfs, Live 0xa34af000
lzo_compress 17302 2 btrfs,lzo, Live 0xa347d000
lzo_decompress 7178 2 btrfs,lzo, Live 0xa3451000
raid6_pq 142086 1 btrfs, Live 0xa33a4000
reed_solomon 31022 1 ramoops, Live 0xa31eb000
test_bitmap 3734 0 - Live 0xa31af000
test_bpf 1588736 0 - Live 0xa2c11000
test_kmod 41161 0 - Live 0xa29f8000
test_module 1356 0 - Live 0xa299e000
test_printf 6024 0 [permanent], Live 0xa2971000
test_static_key_base 5797 1 test_static_keys, Live 0xa2931000
test_user_copy 4382 0 - Live 0xa28c9000
xxhash 70501 2 zstd_compress,zstd_decompress, Live 0xa2055000

Signed-off-by: Zong Li 
Signed-off-by: Palmer Dabbelt