17 Apr, 2019
1 commit
-
commit 10a16997db3d99fc02c026cf2c6e6c670acafab0 upstream.
RISC-V syscall arguments are located in orig_a0,a1..a5 fields
of struct pt_regs.Due to an off-by-one bug and a bug in pointer arithmetic
syscall_get_arguments() was reading s3..s7 fields instead of a1..a5.
Likewise, syscall_set_arguments() was writing s3..s7 fields
instead of a1..a5.Link: http://lkml.kernel.org/r/20190329171221.GA32456@altlinux.org
Fixes: e2c0cdfba7f69 ("RISC-V: User-facing API")
Cc: Ingo Molnar
Cc: Kees Cook
Cc: Andy Lutomirski
Cc: Will Drewry
Cc: Albert Ou
Cc: linux-riscv@lists.infradead.org
Cc: stable@vger.kernel.org # v4.15+
Acked-by: Palmer Dabbelt
Signed-off-by: Dmitry V. Levin
Signed-off-by: Steven Rostedt (VMware)
Signed-off-by: Greg Kroah-Hartman
14 Mar, 2019
2 commits
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[ Upstream commit ae662eec8a515ab550524e04c793b5ddf1aae3a1 ]
This ratio is the most used among all other architectures and make
icache_hygiene libhugetlbfs test pass: this test mmap lots of
hugepages whose addresses, without this patch, reach the end of
the process user address space.Signed-off-by: Alexandre Ghiti
Reviewed-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt
Signed-off-by: Sasha Levin -
[ Upstream commit 28198c4639b39899a728ac89aea29d2a7a72562f ]
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
Signed-off-by: Sasha Levin
20 Feb, 2019
2 commits
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commit e3613bb8afc2a9474c9214d65c8326c5ac02135e upstream.
Previously, invalid PTEs and swap PTEs had the same binary
representation, causing errors when attempting to unmap PROT_NONE
mappings, including implicit unmap on exit.Typical error:
swap_info_get: Bad swap file entry 40000000007a9879
BUG: Bad page map in process a.out pte:3d4c3cc0 pmd:3e521401Cc: stable@vger.kernel.org
Signed-off-by: Stefan O'Rear
Reviewed-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt
Signed-off-by: Greg Kroah-Hartman -
[ Upstream commit 775800b0f1d7303d4fd8ce0e0d9eca4ff2f338f2 ]
Fix compilation error.
Signed-off-by: David Abdurachmanov
Signed-off-by: Palmer Dabbelt
Signed-off-by: Sasha Levin
13 Dec, 2018
1 commit
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[ Upstream commit 0138ebb90c633f76bc71617f8f23635ce41c84fd ]
Fixes warning: 'struct module' declared inside parameter list will not be
visible outside of this definition or declarationSigned-off-by: David Abdurachmanov
Acked-by: Olof Johansson
Signed-off-by: Palmer Dabbelt
Signed-off-by: Sasha Levin
06 Dec, 2018
1 commit
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commit e949b6db51dc172a35c962bc4414ca148315fe21 upstream.
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().Have riscv use the new code, and remove the shadow stack management as well as
having to set up the trace structure.This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.Cc: Greentime Hu
Cc: Alan Kao
Cc: stable@kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Palmer Dabbelt
Reviewed-by: Masami Hiramatsu
Signed-off-by: Steven Rostedt (VMware)
Signed-off-by: Greg Kroah-Hartman
01 Dec, 2018
2 commits
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[ Upstream commit ef3a61406618291c46da168ff91acaa28d85944c ]
Fixes:
arch/riscv/kernel/module.c: In function 'apply_r_riscv_32_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:23:27: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_pcrel_hi20_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:104:23: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_hi20_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:146:23: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_got_hi20_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:190:60: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_call_plt_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:214:24: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_call_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:236:23: note: format string is defined hereSigned-off-by: Olof Johansson
Signed-off-by: Palmer Dabbelt
Signed-off-by: Sasha Levin -
[ Upstream commit f157d411a9eb170d2ee6b766da7a381962017cc9 ]
Building kernel 4.20 for Fedora as RPM fails, because riscv is missing
vdso_install target in arch/riscv/Makefile.Signed-off-by: David Abdurachmanov
Signed-off-by: Palmer Dabbelt
Signed-off-by: Sasha Levin
27 Nov, 2018
1 commit
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commit 21f70d4abf9e17c2e3d7e64b7bfa3424e017f176 upstream.
Sparse highlighted it, and appears to be a pure bug (from vs to).
./arch/riscv/include/asm/uaccess.h:403:35: warning: incorrect type in argument 1 (different address spaces)
./arch/riscv/include/asm/uaccess.h:403:39: warning: incorrect type in argument 2 (different address spaces)
./arch/riscv/include/asm/uaccess.h:409:37: warning: incorrect type in argument 1 (different address spaces)
./arch/riscv/include/asm/uaccess.h:409:41: warning: incorrect type in argument 2 (different address spaces)Signed-off-by: Olof Johansson
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt
Signed-off-by: Greg Kroah-Hartman
03 Oct, 2018
1 commit
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Use memblock_end_of_DRAM which provides correct last low memory
PFN. Without that, DMA32 region becomes empty resulting in zero
pages being allocated for DMA32.This patch is based on earlier patch from palmer which never
merged into 4.19. I just edited the commit text to make more
sense.Signed-off-by: Atish Patra
Signed-off-by: Palmer Dabbelt
25 Sep, 2018
1 commit
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Building a riscv kernel with CONFIG_FUNCTION_TRACER and
CONFIG_MODVERSIONS enabled results in these two warnings:MODPOST vmlinux.o
WARNING: EXPORT symbol "return_to_handler" [vmlinux] version generation failed, symbol will not be versioned.
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.When exporting symbols from an assembly file, the MODVERSIONS code
requires their prototypes to be defined in asm-prototypes.h (see
scripts/Makefile.build). Since both of these symbols have prototypes
defined in linux/ftrace.h, include this header from RISC-V's
asm-prototypes.h.Reported-by: Karsten Merker
Signed-off-by: James Cowgill
Signed-off-by: Palmer Dabbelt
05 Sep, 2018
1 commit
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setup_initrd() overwrites initrd_start and initrd_end if __initramfs_size
is larger than 0, which is always true even if there is no embedded
initramfs. This prevents booting qemu with "-initrd" parameter.
Overwriting initrd_start and initrd_end is not necessary since
__initramfs_start and __initramfs_size are used directly in
populate_rootfs() to load the built-in initramfs, so just drop
that code.Signed-off-by: Guenter Roeck
Signed-off-by: Palmer Dabbelt
29 Aug, 2018
2 commits
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Thanks to Christoph Hellwig for pointing out a cleaner way to do this,
as my approach was quite ugly.CC: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
As of commit fd1102f0aade ("mm: mmu_notifier fix for tlb_end_vma"),
asm-generic/tlb.h now calls tlb_flush() from a static inline function,
so we need to make sure that it's declared before #including the
asm-generic header in the arch header.Reported-by: Guenter Roeck
Fixes: fd1102f0aade ("mm: mmu_notifier fix for tlb_end_vma")
Signed-off-by: Will Deacon
[groeck: Use forward declaration instead of moving inline function]
Signed-off-by: Guenter Roeck
Signed-off-by: Palmer Dabbelt
26 Aug, 2018
1 commit
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Pull more Kbuild updates from Masahiro Yamada:
- add build_{menu,n,g,x}config targets for compile-testing Kconfig
- fix and improve recursive dependency detection in Kconfig
- fix parallel building of menuconfig/nconfig
- fix syntax error in clang-version.sh
- suppress distracting log from syncconfig
- remove obsolete "rpm" target
- remove VMLINUX_SYMBOL(_STR) macro entirely
- fix microblaze build with CONFIG_DYNAMIC_FTRACE
- move compiler test for dead code/data elimination to Kconfig
- rename well-known LDFLAGS variable to KBUILD_LDFLAGS
- misc fixes and cleanups
* tag 'kbuild-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: rename LDFLAGS to KBUILD_LDFLAGS
kbuild: pass LDFLAGS to recordmcount.pl
kbuild: test dead code/data elimination support in Kconfig
initramfs: move gen_initramfs_list.sh from scripts/ to usr/
vmlinux.lds.h: remove stale include
export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()
Coccinelle: remove pci_alloc_consistent semantic to detect in zalloc-simple.cocci
kbuild: make sorting initramfs contents independent of locale
kbuild: remove "rpm" target, which is alias of "rpm-pkg"
kbuild: Fix LOADLIBES rename in Documentation/kbuild/makefiles.txt
kconfig: suppress "configuration written to .config" for syncconfig
kconfig: fix "Can't open ..." in parallel build
kbuild: Add a space after `!` to prevent parsing as file pattern
scripts: modpost: check memory allocation results
kconfig: improve the recursive dependency report
kconfig: report recursive dependency involving 'imply'
kconfig: error out when seeing recursive dependency
kconfig: add build-only configurator targets
scripts/dtc: consolidate include path options in Makefile
24 Aug, 2018
1 commit
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Commit a0f97e06a43c ("kbuild: enable 'make CFLAGS=...' to add
additional options to CC") renamed CFLAGS to KBUILD_CFLAGS.Commit 222d394d30e7 ("kbuild: enable 'make AFLAGS=...' to add
additional options to AS") renamed AFLAGS to KBUILD_AFLAGS.Commit 06c5040cdb13 ("kbuild: enable 'make CPPFLAGS=...' to add
additional options to CPP") renamed CPPFLAGS to KBUILD_CPPFLAGS.For some reason, LDFLAGS was not renamed.
Using a well-known variable like LDFLAGS may result in accidental
override of the variable.Kbuild generally uses KBUILD_ prefixed variables for the internally
appended options, so here is one more conversion to sanitize the
naming convention.I did not touch Makefiles under tools/ since the tools build system
is a different world.Signed-off-by: Masahiro Yamada
Acked-by: Kirill A. Shutemov
Reviewed-by: Palmer Dabbelt
21 Aug, 2018
4 commits
-
This contains a pair of patches that together fix sys_riscv_flush_icache
on all systems:* The first enables sys_riscv_flush_icache() for non-SMP systems.
* The second fixes a bug in our syscall header that caused
sys_riscv_flush_icache to never get generated. -
riscv does not enable CONFIG_COMPAT in default configurations:
defconfig, allmodconfig and allnoconfig.
Remove the asm/compat.h as it does not seem to add any value to
the architecture without CONFIG_COMPAT.Now that time compat syscalls are being reused in non CONFIG_COMPAT
modes, asm-generic/compat.h provides definitions for riscv 32 bit
mode.Reviewed-by: Christoph Hellwig
Signed-off-by: Deepa Dinamani
Cc: palmer@sifive.com
Cc: linux-riscv@lists.infradead.org
Signed-off-by: Palmer Dabbelt -
This file is expected to be included multiple times in the same file in
order to allow the __SYSCALL macro to generate system call tables. With
a global include guard we end up missing __NR_riscv_flush_icache in the
syscall table, which results in icache flushes that escape the vDSO call
to not actually do anything.The fix is to move to per-#define include guards, which allows the
system call tables to actually be populated. Thanks to Macrus Comstedt
for finding and fixing the bug!Cc: Marcus Comstedt
Signed-off-by: Palmer Dabbelt -
This would be necessary to make non-SMP builds work, but there is
another error in the implementation of our syscall linkage that actually
just causes sys_riscv_flush_icache to never build. I've build tested
this on allnoconfig and allnoconfig+SMP=y, as well as defconfig like
normal.CC: Christoph Hellwig
CC: Guenter Roeck
In-Reply-To:
In-Reply-To:
Signed-off-by: Palmer Dabbelt
20 Aug, 2018
1 commit
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…l/git/palmer/riscv-linux
Pull RISC-V updates from Palmer Dabbelt:
"This contains some major improvements to the RISC-V port, including
the necessary interrupt controller and timer support to actually make
it to userspace. Support for three devices has been added:- the ISA-mandated timers on RISC-V systems.
- the ISA-mandated first-level interrupt controller on RISC-V
systems, which is handled as part of our core arch code because
it's very small and tightly tied to the ISA.- SiFive's platform-level interrupt controller, which talks to the
actual devices.In addition to these new devices, there are a handful of cleanups all
over the RISC-V tree:- build fixes for various configurations:
* A fix to the vDSO build's makefile so it respects CFLAGS.
* The addition of __lshrti3, a libgcc derived function necessary
for some 32-bit configurations.
* !SMP && PERF_EVENTS- Cleanups to the arch code to remove the remnants of old versions of
the drivers that were just properly submitted.
* Some dead code from the timer driver, most of which wasn't ever
even compiled.
* Cleanups of some interrupt #defines, which are now local to the
interrupt handling code.- Fixes to ptrace(), which while not being sufficient to fully make
GDB work are at least sufficient to get simple GDB tasks to work.- Early printk support via RISC-V's architecturally mandated SBI
console device.- A fix to our early debug trap handler to ensure it's always
aligned.These patches have all been through a fairly extensive review process,
but as this enables a whole pile of functionality (ie, userspace) I'm
confident we'll need to submit a few more patches. The only concrete
issues I know about are the sys_riscv_flush_icache patches, but as I
managed to screw those up on Friday I figured it'd be best to let them
bake another week.This tag boots a Fedora root filesystem on QEMU's master branch for
me, and before this morning's rebase (from 4.18-rc8 to 4.18) it booted
on the HiFive Unleashed.Thanks to Christoph Hellwig and the other guys at WD for getting the
new drivers in shape!"* tag 'riscv-for-linus-4.19-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
dt-bindings: interrupt-controller: SiFive Plaform Level Interrupt Controller
dt-bindings: interrupt-controller: RISC-V local interrupt controller
RISC-V: Fix !CONFIG_SMP compilation error
irqchip: add a SiFive PLIC driver
RISC-V: Add the directive for alignment of stvec's value
clocksource: new RISC-V SBI timer driver
RISC-V: implement low-level interrupt handling
RISC-V: add a definition for the SIE SEIE bit
RISC-V: remove INTERRUPT_CAUSE_* defines from asm/irq.h
RISC-V: simplify software interrupt / IPI code
RISC-V: remove timer leftovers
RISC-V: Add early printk support via the SBI console
RISC-V: Don't increment sepc after breakpoint.
RISC-V: implement __lshrti3.
RISC-V: Use KBUILD_CFLAGS instead of KCFLAGS when building the vDSO
18 Aug, 2018
1 commit
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Use new return type vm_fault_t for fault handler. For now, this is just
documenting that the function returns a VM_FAULT value rather than an
errno. Once all instances are converted, vm_fault_t will become a
distinct type.Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
In this patch all the caller of handle_mm_fault() are changed to return
vm_fault_t type.Link: http://lkml.kernel.org/r/20180617084810.GA6730@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder
Cc: Matthew Wilcox
Cc: Richard Henderson
Cc: Tony Luck
Cc: Matt Turner
Cc: Vineet Gupta
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Richard Kuo
Cc: Geert Uytterhoeven
Cc: Michal Simek
Cc: James Hogan
Cc: Ley Foon Tan
Cc: Jonas Bonn
Cc: James E.J. Bottomley
Cc: Benjamin Herrenschmidt
Cc: Palmer Dabbelt
Cc: Yoshinori Sato
Cc: David S. Miller
Cc: Richard Weinberger
Cc: Guan Xuetao
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: "Levin, Alexander (Sasha Levin)"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Aug, 2018
2 commits
-
Pull Kconfig consolidation from Masahiro Yamada:
"Consolidation of Kconfig files by Christoph Hellwig.Move the source statements of arch-independent Kconfig files instead
of duplicating the includes in every arch/$(SRCARCH)/Kconfig"* tag 'kconfig-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: add a Memory Management options" menu
kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt
kconfig: use a menu in arch/Kconfig to reduce clutter
kconfig: include kernel/Kconfig.preempt from init/Kconfig
Kconfig: consolidate the "Kernel hacking" menu
kconfig: include common Kconfig files from top-level Kconfig
kconfig: remove duplicate SWAP symbol defintions
um: create a proper drivers Kconfig
um: cleanup Kconfig files
um: stop abusing KBUILD_KCONFIG -
Pull Kbuild updates from Masahiro Yamada:
- verify depmod is installed before modules_install
- support build salt in case build ids must be unique between builds
- allow users to specify additional host compiler flags via HOST*FLAGS,
and rename internal variables to KBUILD_HOST*FLAGS- update buildtar script to drop vax support, add arm64 support
- update builddeb script for better debarch support
- document the pit-fall of if_changed usage
- fix parallel build of UML with O= option
- make 'samples' target depend on headers_install to fix build errors
- remove deprecated host-progs variable
- add a new coccinelle script for refcount_t vs atomic_t check
- improve double-test coccinelle script
- misc cleanups and fixes
* tag 'kbuild-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits)
coccicheck: return proper error code on fail
Coccinelle: doubletest: reduce side effect false positives
kbuild: remove deprecated host-progs variable
kbuild: make samples really depend on headers_install
um: clean up archheaders recipe
kbuild: add %asm-generic to no-dot-config-targets
um: fix parallel building with O= option
scripts: Add Python 3 support to tracing/draw_functrace.py
builddeb: Add automatic support for sh{3,4}{,eb} architectures
builddeb: Add automatic support for riscv* architectures
builddeb: Add automatic support for m68k architecture
builddeb: Add automatic support for or1k architecture
builddeb: Add automatic support for sparc64 architecture
builddeb: Add automatic support for mips{,64}r6{,el} architectures
builddeb: Add automatic support for mips64el architecture
builddeb: Add automatic support for ppc64 and powerpcspe architectures
builddeb: Introduce functions to simplify kconfig tests in set_debarch
builddeb: Drop check for 32-bit s390
builddeb: Change architecture detection fallback to use dpkg-architecture
builddeb: Skip architecture detection when KBUILD_DEBARCH is set
...
13 Aug, 2018
13 commits
-
Enabling both CONFIG_PERF_EVENTS without !CONFIG_SMP
generates following compilation error.arch/riscv/include/asm/perf_event.h:80:2: error: expected
specifier-qualifier-list before 'irqreturn_t'irqreturn_t (*handle_irq)(int irq_num, void *dev);
^~~~~~~~~~~Include interrupt.h in proper place to avoid compilation
error.Signed-off-by: Atish Patra
Signed-off-by: Palmer Dabbelt -
Add a driver for the SiFive implementation of the RISC-V Platform Level
Interrupt Controller (PLIC). The PLIC connects global interrupt sources
to the local interrupt controller on each hart.This driver is based on the driver in the RISC-V tree from Palmer Dabbelt,
but has been almost entirely rewritten since, and includes many fixes
from Atish Patra.Signed-off-by: Christoph Hellwig
Acked-by: Thomas Gleixner
Reviewed-by: Atish Patra
[Binding update by Palmer]
Signed-off-by: Palmer Dabbelt -
The stvec's value must be 4 byte alignment by specification definition.
These directives avoid to stvec be set the non-alignment value.Signed-off-by: Zong Li
Signed-off-by: Palmer Dabbelt -
The RISC-V ISA defines a per-hart real-time clock and timer, which is
present on all systems. The clock is accessed via the 'rdtime'
pseudo-instruction (which reads a CSR), and the timer is set via an SBI
call.Contains various improvements from Atish Patra .
Signed-off-by: Dmitriy Cherkasov
Signed-off-by: Palmer Dabbelt
[hch: remove dead code, add SPDX tags, used riscv_of_processor_hart(),
minor cleanups, merged hotplug cpu support and other improvements
from Atish]
Signed-off-by: Christoph Hellwig
Acked-by: Thomas Gleixner
Reviewed-by: Atish Patra
Signed-off-by: Palmer Dabbelt -
Add support for a routine that dispatches exceptions with the interrupt
flags set to either the IPI or irqdomain code (and the clock source in the
future).Loosely based on the irq-riscv-int.c irqchip driver from the RISC-V tree.
Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
This mirrors the SIE_SSIE and SETE bits that are used in a similar
fashion.Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
These are only of use to the local irq controller driver, so add them in
that driver implementation instead, which will be submitted soon.Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
Rename handle_ipi to riscv_software_interrupt, drop the unused return
value and move the prototype to irq.h together with riscv_timer_interupt.
This allows simplifying the upcoming interrupt handling support.Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
This code is currently unused and will be added back later in a different
place with the real interrupt and clocksource support.Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
This code lives entirely within the RISC-V arch code. I've left it
within an "#ifdef CONFIG_EARLY_PRINTK" despite always having
EARLY_PRINTK support on RISC-V just in case someone wants to remove
it.Reviewed-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
Adding 4 to sepc is pointless, and is wrong if we executed a 2-byte
compressed breakpoint. This plus a corresponding gdb patch allows
compressed breakpoints to work in gdb. Gdb maintainers have already
agreed that this is the right approach.Signed-off-by: Jim Wilson
Signed-off-by: Palmer Dabbelt -
Signed-off-by: Alex Guo
Signed-off-by: Palmer Dabbelt -
If you use a 64-bit compiler to build a 32-bit kernel then you'll get an
error when building the vDSO due to a library mismatch. The happens
because the relevant "-march" argument isn't supplied to the GCC run
that generates one of the vDSO intermediate files.I'm not actually sure what the right thing to do here is as I'm not
particularly familiar with the kernel build system. I poked the
documentation and it appears that KCFLAGS is the correct thing to do
(it's suggested that should be used when building modules), but we set
KBUILD_CFLAGS in arch/riscv/Makefile.This does at least fix the build error.
Reviewed-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt
02 Aug, 2018
2 commits
-
Almost all architectures include it. Add a ARCH_NO_PREEMPT symbol to
disable preempt support for alpha, hexagon, non-coldfire m68k and
user mode Linux.Signed-off-by: Christoph Hellwig
Signed-off-by: Masahiro Yamada -
Move the source of lib/Kconfig.debug and arch/$(ARCH)/Kconfig.debug to
the top-level Kconfig. For two architectures that means moving their
arch-specific symbols in that menu into a new arch Kconfig.debug file,
and for a few more creating a dummy file so that we can include it
unconditionally.Also move the actual 'Kernel hacking' menu to lib/Kconfig.debug, where
it belongs.Signed-off-by: Christoph Hellwig
Signed-off-by: Masahiro Yamada