20 Jan, 2021
3 commits
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commit 7cd1af107a92eb63b93a96dc07406dcbc5269436 upstream.
We should call irq trace only if interrupt is going to be enabled during
excecption handling. Otherwise, it results in following warning during
boot with lock debugging enabled.[ 0.000000] ------------[ cut here ]------------
[ 0.000000] DEBUG_LOCKS_WARN_ON(early_boot_irqs_disabled)
[ 0.000000] WARNING: CPU: 0 PID: 0 at kernel/locking/lockdep.c:4085 lockdep_hardirqs_on_prepare+0x22a/0x22e
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.0-00022-ge20097fb37e2-dirty #548
[ 0.000000] epc: c005d5d4 ra : c005d5d4 sp : c1c01e80
[ 0.000000] gp : c1d456e0 tp : c1c0a980 t0 : 00000000
[ 0.000000] t1 : ffffffff t2 : 00000000 s0 : c1c01ea0
[ 0.000000] s1 : c100f360 a0 : 0000002d a1 : c00666ee
[ 0.000000] a2 : 00000000 a3 : 00000000 a4 : 00000000
[ 0.000000] a5 : 00000000 a6 : c1c6b390 a7 : 3ffff00e
[ 0.000000] s2 : c2384fe8 s3 : 00000000 s4 : 00000001
[ 0.000000] s5 : c1c0a980 s6 : c1d48000 s7 : c1613b4c
[ 0.000000] s8 : 00000fff s9 : 80000200 s10: c1613b40
[ 0.000000] s11: 00000000 t3 : 00000000 t4 : 00000000
[ 0.000000] t5 : 00000001 t6 : 00000000Fixes: 3c4697982982 ("riscv:Enable LOCKDEP_SUPPORT & fixup TRACE_IRQFLAGS_SUPPORT")
Signed-off-by: Atish Patra
Signed-off-by: Palmer Dabbelt
Signed-off-by: Greg Kroah-Hartman -
commit 0aa2ec8a475fb505fd98d93bbcf4e03beeeebcb6 upstream.
The patch fix commit: ad5d112 ("riscv: use vDSO common flow to
reduce the latency of the time-related functions").The GENERIC_TIME_VSYSCALL should be CONFIG_GENERIC_TIME_VSYSCALL
or vgettimeofday won't work.Signed-off-by: Guo Ren
Reviewed-by: Pekka Enberg
Fixes: ad5d1122b82f ("riscv: use vDSO common flow to reduce the latency of the time-related functions")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt
Signed-off-by: Greg Kroah-Hartman -
commit cf7b2ae4d70432fa94ebba3fbaab825481ae7189 upstream.
Properly return -ENOSYS for syscall -1 instead of leaving the return value
uninitialized. This fixes the strace teststuite.Fixes: 5340627e3fe0 ("riscv: add support for SECCOMP and SECCOMP_FILTER")
Cc: stable@vger.kernel.org
Signed-off-by: Andreas Schwab
Reviewed-by: Tycho Andersen
Signed-off-by: Palmer Dabbelt
Signed-off-by: Greg Kroah-Hartman
30 Nov, 2020
1 commit
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Pull locking fixes from Thomas Gleixner:
"Two more places which invoke tracing from RCU disabled regions in the
idle path.Similar to the entry path the low level idle functions have to be
non-instrumentable"* tag 'locking-urgent-2020-11-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
intel_idle: Fix intel_idle() vs tracing
sched/idle: Fix arch_cpu_idle() vs tracing
26 Nov, 2020
2 commits
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The jump_label_init() should be called from setup_arch() very
early for proper functioning of jump label support.Fixes: ebc00dde8a97 ("riscv: Add jump-label implementation")
Signed-off-by: Anup Patel
Signed-off-by: Palmer Dabbelt -
Commit a96843372331 ("kbuild: explicitly specify the build id style")
explicitly set the build ID style to SHA1. Commit c2c81bb2f691 ("RISC-V:
Fix the VDSO symbol generaton for binutils-2.35+") undid this change,
likely unintentionally.Restore it so that the build ID style stays consistent across the tree
regardless of linker.Fixes: c2c81bb2f691 ("RISC-V: Fix the VDSO symbol generaton for binutils-2.35+")
Signed-off-by: Nathan Chancellor
Reviewed-by: Nick Desaulniers
Reviewed-by: Bill Wendling
Signed-off-by: Palmer Dabbelt
24 Nov, 2020
1 commit
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We call arch_cpu_idle() with RCU disabled, but then use
local_irq_{en,dis}able(), which invokes tracing, which relies on RCU.Switch all arch_cpu_idle() implementations to use
raw_local_irq_{en,dis}able() and carefully manage the
lockdep,rcu,tracing state like we do in entry.(XXX: we really should change arch_cpu_idle() to not return with
interrupts enabled)Reported-by: Sven Schnelle
Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Mark Rutland
Tested-by: Mark Rutland
Link: https://lkml.kernel.org/r/20201120114925.594122626@infradead.org
16 Nov, 2020
1 commit
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Pull perf fixes from Thomas Gleixner:
"A set of fixes for perf:- A set of commits which reduce the stack usage of various perf
event handling functions which allocated large data structs on
stack causing stack overflows in the worst case- Use the proper mechanism for detecting soft interrupts in the
recursion protection- Make the resursion protection simpler and more robust
- Simplify the scheduling of event groups to make the code more
robust and prepare for fixing the issues vs. scheduling of
exclusive event groups- Prevent event multiplexing and rotation for exclusive event groups
- Correct the perf event attribute exclusive semantics to take
pinned events, e.g. the PMU watchdog, into account- Make the anythread filtering conditional for Intel's generic PMU
counters as it is not longer guaranteed to be supported on newer
CPUs. Check the corresponding CPUID leaf to make sure- Fixup a duplicate initialization in an array which was probably
caused by the usual 'copy & paste - forgot to edit' mishap"* tag 'perf-urgent-2020-11-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel/uncore: Fix Add BW copypasta
perf/x86/intel: Make anythread filter support conditional
perf: Tweak perf_event_attr::exclusive semantics
perf: Fix event multiplexing for exclusive groups
perf: Simplify group_sched_in()
perf: Simplify group_sched_out()
perf/x86: Make dummy_iregs static
perf/arch: Remove perf_sample_data::regs_user_copy
perf: Optimize get_recursion_context()
perf: Fix get_recursion_context()
perf/x86: Reduce stack usage for x86_pmu::drain_pebs()
perf: Reduce stack usage of perf_output_begin()
10 Nov, 2020
1 commit
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struct perf_sample_data lives on-stack, we should be careful about it's
size. Furthermore, the pt_regs copy in there is only because x86_64 is a
trainwreck, solve it differently.Reported-by: Thomas Gleixner
Signed-off-by: Peter Zijlstra (Intel)
Tested-by: Steven Rostedt
Link: https://lkml.kernel.org/r/20201030151955.258178461@infradead.org
06 Nov, 2020
2 commits
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We were relying on GNU ld's ability to re-link executable files in order
to extract our VDSO symbols. This behavior was deemed a bug as of
binutils-2.35 (specifically the binutils-gdb commit a87e1817a4 ("Have
the linker fail if any attempt to link in an executable is made."), but
as that has been backported to at least Debian's binutils-2.34 in may
manifest in other places.The previous version of this was a bit of a mess: we were linking a
static executable version of the VDSO, containing only a subset of the
input symbols, which we then linked into the kernel. This worked, but
certainly wasn't a supported path through the toolchain. Instead this
new version parses the textual output of nm to produce a symbol table.
Both rely on near-zero addresses being linkable, but as we rely on weak
undefined symbols being linkable elsewhere I don't view this as a major
issue.Fixes: e2c0cdfba7f6 ("RISC-V: User-facing API")
Signed-off-by: Palmer Dabbelt -
M-Mode Linux is loaded at the start of RAM, not 2MB later. Perhaps this
should be calculated based on PAGE_OFFSET somehow? Even better would be to
deprecate text_offset and instead introduce something absolute.Signed-off-by: Sean Anderson
Signed-off-by: Palmer Dabbelt
05 Nov, 2020
1 commit
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Signed-off-by: Ryan Kosta
Signed-off-by: Palmer Dabbelt
26 Oct, 2020
1 commit
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Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.Remove the quote operator # from compiler_attributes.h __section macro.
Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.Conversion done using the script at:
https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl
Signed-off-by: Joe Perches
Reviewed-by: Nick Desaulniers
Reviewed-by: Miguel Ojeda
Signed-off-by: Linus Torvalds
25 Oct, 2020
1 commit
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Pull more RISC-V updates from Palmer Dabbelt:
"Just a single patch set: the remainder of Christoph's work to remove
set_fs, including the RISC-V portion"* tag 'riscv-for-linus-5.10-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: remove address space overrides using set_fs()
riscv: implement __get_kernel_nofault and __put_user_nofault
riscv: refactor __get_user and __put_user
riscv: use memcpy based uaccess for nommu again
asm-generic: make the set_fs implementation optional
asm-generic: add nommu implementations of __{get,put}_kernel_nofault
asm-generic: improve the nommu {get,put}_user handling
uaccess: provide a generic TASK_SIZE_MAX definition
24 Oct, 2020
1 commit
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Pull arch task_work cleanups from Jens Axboe:
"Two cleanups that don't fit other categories:- Finally get the task_work_add() cleanup done properly, so we don't
have random 0/1/false/true/TWA_SIGNAL confusing use cases. Updates
all callers, and also fixes up the documentation for
task_work_add().- While working on some TIF related changes for 5.11, this
TIF_NOTIFY_RESUME cleanup fell out of that. Remove some arch
duplication for how that is handled"* tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-block:
task_work: cleanup notification modes
tracehook: clear TIF_NOTIFY_RESUME in tracehook_notify_resume()
23 Oct, 2020
1 commit
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Pull Kbuild updates from Masahiro Yamada:
- Support 'make compile_commands.json' to generate the compilation
database more easily, avoiding stale entries- Support 'make clang-analyzer' and 'make clang-tidy' for static checks
using clang-tidy- Preprocess scripts/modules.lds.S to allow CONFIG options in the
module linker script- Drop cc-option tests from compiler flags supported by our minimal
GCC/Clang versions- Use always 12-digits commit hash for CONFIG_LOCALVERSION_AUTO=y
- Use sha1 build id for both BFD linker and LLD
- Improve deb-pkg for reproducible builds and rootless builds
- Remove stale, useless scripts/namespace.pl
- Turn -Wreturn-type warning into error
- Fix build error of deb-pkg when CONFIG_MODULES=n
- Replace 'hostname' command with more portable 'uname -n'
- Various Makefile cleanups
* tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
kbuild: Use uname for LINUX_COMPILE_HOST detection
kbuild: Only add -fno-var-tracking-assignments for old GCC versions
kbuild: remove leftover comment for filechk utility
treewide: remove DISABLE_LTO
kbuild: deb-pkg: clean up package name variables
kbuild: deb-pkg: do not build linux-headers package if CONFIG_MODULES=n
kbuild: enforce -Werror=return-type
scripts: remove namespace.pl
builddeb: Add support for all required debian/rules targets
builddeb: Enable rootless builds
builddeb: Pass -n to gzip for reproducible packages
kbuild: split the build log of kallsyms
kbuild: explicitly specify the build id style
scripts/setlocalversion: make git describe output more reliable
kbuild: remove cc-option test of -Werror=date-time
kbuild: remove cc-option test of -fno-stack-check
kbuild: remove cc-option test of -fno-strict-overflow
kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles
kbuild: remove redundant CONFIG_KASAN check from scripts/Makefile.kasan
kbuild: do not create built-in objects for external module builds
...
20 Oct, 2020
1 commit
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Pull RISC-V updates from Palmer Dabbelt:
"A handful of cleanups and new features:- A handful of cleanups for our page fault handling
- Improvements to how we fill out cacheinfo
- Support for EFI-based systems"
* tag 'riscv-for-linus-5.10-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (22 commits)
RISC-V: Add page table dump support for uefi
RISC-V: Add EFI runtime services
RISC-V: Add EFI stub support.
RISC-V: Add PE/COFF header for EFI stub
RISC-V: Implement late mapping page table allocation functions
RISC-V: Add early ioremap support
RISC-V: Move DT mapping outof fixmap
RISC-V: Fix duplicate included thread_info.h
riscv/mm/fault: Set FAULT_FLAG_INSTRUCTION flag in do_page_fault()
riscv/mm/fault: Fix inline placement in vmalloc_fault() declaration
riscv: Add cache information in AUX vector
riscv: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
riscv: Set more data to cacheinfo
riscv/mm/fault: Move access error check to function
riscv/mm/fault: Move FAULT_FLAG_WRITE handling in do_page_fault()
riscv/mm/fault: Simplify mm_fault_error()
riscv/mm/fault: Move fault error handling to mm_fault_error()
riscv/mm/fault: Simplify fault error handling
riscv/mm/fault: Move vmalloc fault handling to vmalloc_fault()
riscv/mm/fault: Move bad area handling to bad_area()
...
18 Oct, 2020
1 commit
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All the callers currently do this, clean it up and move the clearing
into tracehook_notify_resume() instead.Reviewed-by: Oleg Nesterov
Reviewed-by: Thomas Gleixner
Signed-off-by: Jens Axboe
13 Oct, 2020
1 commit
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Pull orphan section checking from Ingo Molnar:
"Orphan link sections were a long-standing source of obscure bugs,
because the heuristics that various linkers & compilers use to handle
them (include these bits into the output image vs discarding them
silently) are both highly idiosyncratic and also version dependent.Instead of this historically problematic mess, this tree by Kees Cook
(et al) adds build time asserts and build time warnings if there's any
orphan section in the kernel or if a section is not sized as expected.And because we relied on so many silent assumptions in this area, fix
a metric ton of dependencies and some outright bugs related to this,
before we can finally enable the checks on the x86, ARM and ARM64
platforms"* tag 'core-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
x86/boot/compressed: Warn on orphan section placement
x86/build: Warn on orphan section placement
arm/boot: Warn on orphan section placement
arm/build: Warn on orphan section placement
arm64/build: Warn on orphan section placement
x86/boot/compressed: Add missing debugging sections to output
x86/boot/compressed: Remove, discard, or assert for unwanted sections
x86/boot/compressed: Reorganize zero-size section asserts
x86/build: Add asserts for unwanted sections
x86/build: Enforce an empty .got.plt section
x86/asm: Avoid generating unused kprobe sections
arm/boot: Handle all sections explicitly
arm/build: Assert for unwanted sections
arm/build: Add missing sections
arm/build: Explicitly keep .ARM.attributes sections
arm/build: Refactor linker script headers
arm64/build: Assert for unwanted sections
arm64/build: Add missing DWARF sections
arm64/build: Use common DISCARDS in linker script
arm64/build: Remove .eh_frame* sections due to unwind tables
...
09 Oct, 2020
1 commit
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ld's --build-id defaults to "sha1" style, while lld defaults to "fast".
The build IDs are very different between the two, which may confuse
programs that reference them.Signed-off-by: Bill Wendling
Acked-by: David S. Miller
Signed-off-by: Masahiro Yamada
07 Oct, 2020
1 commit
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6184358da000 ("riscv: Fixup static_obj() fail") attempted to elide a lockdep
failure by rearranging our kernel image to place all initdata within [_stext,
_end], thus triggering lockdep to treat these as static objects. These objects
are released and eventually reallocated, causing check_kernel_text_object() to
trigger a BUG().This backs out the change to make [_stext, _end] all-encompassing, instead just
moving initdata. This results in initdata being outside of [__init_begin,
__init_end], which means initdata can't be freed.Link: https://lore.kernel.org/linux-riscv/1593266228-61125-1-git-send-email-guoren@kernel.org/T/#t
Signed-off-by: Guo Ren
Reported-by: Aurelien Jarno
Tested-by: Aurelien Jarno
[Palmer: Clean up commit text]
Signed-off-by: Palmer Dabbelt
05 Oct, 2020
1 commit
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Stop providing the possibility to override the address space using
set_fs() now that there is no need for that any more.Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt
03 Oct, 2020
4 commits
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This patch adds EFI runtime service support for RISC-V.
Signed-off-by: Atish Patra
[ardb: - Remove the page check]
Signed-off-by: Ard Biesheuvel
Acked-by: Ard Biesheuvel
Signed-off-by: Palmer Dabbelt -
Linux kernel Image can appear as an EFI application With appropriate
PE/COFF header fields in the beginning of the Image header. An EFI
application loader can directly load a Linux kernel Image and an EFI
stub residing in kernel can boot Linux kernel directly.Add the necessary PE/COFF header.
Signed-off-by: Atish Patra
Link: https://lore.kernel.org/r/20200421033336.9663-3-atish.patra@wdc.com
[ardb: - use C prefix for c.li to ensure the expected opcode is emitted
- align all image sections according to PE/COFF section alignment ]
Signed-off-by: Ard Biesheuvel
Reviewed-by: Anup Patel
Signed-off-by: Palmer Dabbelt -
UEFI uses early IO or memory mappings for runtime services before
normal ioremap() is usable. Add the necessary fixmap bindings and
pmd mappings for generic ioremap support to work.Signed-off-by: Atish Patra
Reviewed-by: Anup Patel
Reviewed-by: Palmer Dabbelt
Signed-off-by: Palmer Dabbelt -
Currently, RISC-V reserves 1MB of fixmap memory for device tree. However,
it maps only single PMD (2MB) space for fixmap which leaves only < 1MB space
left for other kernel features such as early ioremap which requires fixmap
as well. The fixmap size can be increased by another 2MB but it brings
additional complexity and changes the virtual memory layout as well.
If we require some additional feature requiring fixmap again, it has to be
moved again.Technically, DT doesn't need a fixmap as the memory occupied by the DT is
only used during boot. That's why, We map device tree in early page table
using two consecutive PGD mappings at lower addresses (< PAGE_OFFSET).
This frees lot of space in fixmap and also makes maximum supported
device tree size supported as PGDIR_SIZE. Thus, init memory section can be used
for the same purpose as well. This simplifies fixmap implementation.Signed-off-by: Anup Patel
Signed-off-by: Atish Patra
Reviewed-by: Palmer Dabbelt
Signed-off-by: Palmer Dabbelt
24 Sep, 2020
1 commit
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There was a request to preprocess the module linker script like we
do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512)The difference between vmlinux.lds and module.lds is that the latter
is needed for external module builds, thus must be cleaned up by
'make mrproper' instead of 'make clean'. Also, it must be created
by 'make modules_prepare'.You cannot put it in arch/$(SRCARCH)/kernel/, which is cleaned up by
'make clean'. I moved arch/$(SRCARCH)/kernel/module.lds to
arch/$(SRCARCH)/include/asm/module.lds.h, which is included from
scripts/module.lds.S.scripts/module.lds is fine because 'make clean' keeps all the
build artifacts under scripts/.You can add arch-specific sections in .
Signed-off-by: Masahiro Yamada
Tested-by: Jessica Yu
Acked-by: Will Deacon
Acked-by: Geert Uytterhoeven
Acked-by: Palmer Dabbelt
Reviewed-by: Kees Cook
Acked-by: Jessica Yu
21 Sep, 2020
1 commit
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Pull RISC-V fixes from Palmer Dabbelt:
- A fix for a lockdep issue to avoid an asserting triggering during
early boot. There shouldn't be any incorrect behavior as the system
isn't concurrent at the time.- The addition of a missing fence when installing early fixmap
mappings.- A corretion to the K210 device tree's interrupt map.
- A fix for M-mode timer handling on the K210.
* tag 'riscv-for-linus-5.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: Resurrect the MMIO timer implementation for M-mode systems
riscv: Fix Kendryte K210 device tree
riscv: Add sfence.vma after early page table changes
RISC-V: Take text_mutex in ftrace_init_nop()
16 Sep, 2020
3 commits
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asm/thread_info.h is included more than once, Remove the one that isn't
necessary.Signed-off-by: Tian Tao
Signed-off-by: Palmer Dabbelt -
There are no standard CSR registers to provide cache information, the
way for RISC-V is to get this information from DT. Currently, AT_L1I_X,
AT_L1D_X and AT_L2_X are present in glibc header, and sysconf syscall
could use them to get information of cache through AUX vector.The result of 'getconf -a' as follows:
LEVEL1_ICACHE_SIZE 32768
LEVEL1_ICACHE_ASSOC 8
LEVEL1_ICACHE_LINESIZE 64
LEVEL1_DCACHE_SIZE 32768
LEVEL1_DCACHE_ASSOC 8
LEVEL1_DCACHE_LINESIZE 64
LEVEL2_CACHE_SIZE 2097152
LEVEL2_CACHE_ASSOC 32
LEVEL2_CACHE_LINESIZE 64Signed-off-by: Zong Li
Reviewed-by: Palmer Dabbelt
Reviewed-by: Pekka Enberg
Signed-off-by: Palmer Dabbelt -
Set cacheinfo.{size,sets,line_size} for each cache node, then we can
get these information from userland through auxiliary vector.Signed-off-by: Zong Li
Reviewed-by: Pekka Enberg
Signed-off-by: Palmer Dabbelt
12 Sep, 2020
1 commit
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Without this we get lockdep failures. They're spurious failures as SMP isn't
up when ftrace_init_nop() is called. As far as I can tell the easiest fix is
to just take the lock, which also seems like the safest fix.Signed-off-by: Palmer Dabbelt
Acked-by: Guo Ren
Signed-off-by: Palmer Dabbelt
01 Sep, 2020
1 commit
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The .comment section doesn't belong in STABS_DEBUG. Split it out into a
new macro named ELF_DETAILS. This will gain other non-debug sections
that need to be accounted for when linking with --orphan-handling=warn.Signed-off-by: Kees Cook
Signed-off-by: Ingo Molnar
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20200821194310.3089815-5-keescook@chromium.org
24 Aug, 2020
1 commit
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Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through
Signed-off-by: Gustavo A. R. Silva
21 Aug, 2020
2 commits
-
Right now the RISC-V timer driver is convoluted to support:
1. Linux RISC-V S-mode (with MMU) where it will use TIME CSR for
clocksource and SBI timer calls for clockevent device.
2. Linux RISC-V M-mode (without MMU) where it will use CLINT MMIO
counter register for clocksource and CLINT MMIO compare register
for clockevent device.We now have a separate CLINT timer driver which also provide CLINT
based IPI operations so let's remove CLINT MMIO related code from
arch/riscv directory and RISC-V timer driver.Signed-off-by: Anup Patel
Tested-by: Emil Renner Berhing
Acked-by: Daniel Lezcano
Reviewed-by: Atish Patra
Reviewed-by: Palmer Dabbelt
Signed-off-by: Palmer Dabbelt -
We add mechanism to set custom IPI operations so that CLINT driver
from drivers directory can provide custom IPI operations.Signed-off-by: Anup Patel
Tested-by: Emil Renner Berhing
Reviewed-by: Atish Patra
Reviewed-by: Palmer Dabbelt
Signed-off-by: Palmer Dabbelt
15 Aug, 2020
1 commit
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Exception vector is missing on nommu platform and that is an issue.
This patch is tested in Sipeed Maix Bit Dev Board.Fixes: 79b1feba5455 ("RISC-V: Setup exception vector early")
Suggested-by: Anup Patel
Suggested-by: Atish Patra
Signed-off-by: Qiu Wenbo
Reviewed-by: Atish Patra
Reviewed-by: Anup Patel
Signed-off-by: Palmer Dabbelt
08 Aug, 2020
2 commits
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Pull RISC-V updates from Palmer Dabbelt:
"We have a lot of new kernel features for this merge window:- ARCH_SUPPORTS_ATOMIC_RMW, to allow OSQ locks to be enabled
- The ability to enable NO_HZ_FULL
- Support for enabling kcov, kmemleak, stack protector, and VM
debugging- JUMP_LABEL support
There are also a handful of cleanups"
* tag 'riscv-for-linus-5.9-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (24 commits)
riscv: disable stack-protector for vDSO
RISC-V: Fix build warning for smpboot.c
riscv: fix build warning of mm/pageattr
riscv: Fix build warning for mm/init
RISC-V: Setup exception vector early
riscv: Select ARCH_HAS_DEBUG_VM_PGTABLE
riscv: Use generic pgprot_* macros from
mm: pgtable: Make generic pgprot_* macros available for no-MMU
riscv: Cleanup unnecessary define in asm-offset.c
riscv: Add jump-label implementation
riscv: Support R_RISCV_ADD64 and R_RISCV_SUB64 relocs
Replace HTTP links with HTTPS ones: RISC-V
riscv: Add STACKPROTECTOR supported
riscv: Fix typo in asm/hwcap.h uapi header
riscv: Add kmemleak support
riscv: Allow building with kcov coverage
riscv: Enable context tracking
riscv: Support irq_work via self IPIs
riscv: Enable LOCKDEP_SUPPORT & fixup TRACE_IRQFLAGS_SUPPORT
riscv: Fixup lockdep_assert_held with wrong param cpu_running
... -
Pull ptrace regset updates from Al Viro:
"Internal regset API changes:- regularize copy_regset_{to,from}_user() callers
- switch to saner calling conventions for ->get()
- kill user_regset_copyout()
The ->put() side of things will have to wait for the next cycle,
unfortunately.The balance is about -1KLoC and replacements for ->get() instances are
a lot saner"* 'work.regset' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (41 commits)
regset: kill user_regset_copyout{,_zero}()
regset(): kill ->get_size()
regset: kill ->get()
csky: switch to ->regset_get()
xtensa: switch to ->regset_get()
parisc: switch to ->regset_get()
nds32: switch to ->regset_get()
nios2: switch to ->regset_get()
hexagon: switch to ->regset_get()
h8300: switch to ->regset_get()
openrisc: switch to ->regset_get()
riscv: switch to ->regset_get()
c6x: switch to ->regset_get()
ia64: switch to ->regset_get()
arc: switch to ->regset_get()
arm: switch to ->regset_get()
sh: convert to ->regset_get()
arm64: switch to ->regset_get()
mips: switch to ->regset_get()
sparc: switch to ->regset_get()
...
05 Aug, 2020
1 commit
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Currently, building the vDSO with clang leads assembler errors like the
following:/tmp/vgettimeofday-1ae0d2.s: Assembler messages:
/tmp/vgettimeofday-1ae0d2.s:28: Error: bad expression
/tmp/vgettimeofday-1ae0d2.s:28: Error: illegal operands `auipc a2,%got_pcrel_hi(__stack_chk_guard)'Disable the stack-protector for vDSO to fix these.
Link: https://github.com/ClangBuiltLinux/linux/issues/1112
Signed-off-by: Tobias Klauser
Signed-off-by: Palmer Dabbelt
