25 Jan, 2021
1 commit
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Change-Id: I173bc0325c93daaf82bb894f77ba35fa827864de
20 Jan, 2021
2 commits
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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 0ea02c73775277001c651ad4a0e83781a9acf406 upstream.
commit b91540d52a08 ("RISC-V: Add EFI runtime services") add
a duplicated PAGE_KERNEL_EXEC, kill it.Signed-off-by: Kefeng Wang
Reviewed-by: Pekka Enberg
Reviewed-by: Atish Patra
Fixes: b91540d52a08 ("RISC-V: Add EFI runtime services")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt
Signed-off-by: Greg Kroah-Hartman
13 Jan, 2021
1 commit
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[ Upstream commit 87dbc209ea04645fd2351981f09eff5d23f8e2e9 ]
Make mandatory in include/asm-generic/Kbuild and
remove all arch/*/include/asm/local64.h arch-specific files since they
only #include .This fixes build errors on arch/c6x/ and arch/nios2/ for
block/blk-iocost.c.Build-tested on 21 of 25 arch-es. (tools problems on the others)
Yes, we could even rename to
and change all #includes to use
instead.Link: https://lkml.kernel.org/r/20201227024446.17018-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap
Suggested-by: Christoph Hellwig
Reviewed-by: Masahiro Yamada
Cc: Jens Axboe
Cc: Ley Foon Tan
Cc: Mark Salter
Cc: Aurelien Jacquiot
Cc: Peter Zijlstra
Cc: Arnd Bergmann
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
Signed-off-by: Sasha Levin
22 Dec, 2020
1 commit
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To enable seccomp constant action bitmaps, we need to have a static
mapping to the audit architecture and system call table size. Add these
for riscv.Signed-off-by: YiFei Zhu
Signed-off-by: Kees Cook
Link: https://lore.kernel.org/r/58ef925d00505cbb77478fa6bd2b48ab2d902460.1605101222.git.yifeifz2@illinois.edu
(cherry picked from commit 673a11a7e4152b101bad6851c4e4c34c7c6d6dde)
Signed-off-by: Jeff Vander Stoep
Bug: 176068146
Change-Id: Id527ef5da40301bbdca59d92ed24523959f96707
13 Dec, 2020
1 commit
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Pull RISC-V fix from Palmer Dabbelt:
"Just one fix. It's nothing critical, just a randconfig that wasn't
building. That said, it does seem pretty safe and is technically a
regression so I'm sending it along for 5.10:- define get_cycles64() all the time, as it's used by most
configurations"* tag 'riscv-for-linus-5.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: Define get_cycles64() regardless of M-mode
11 Dec, 2020
1 commit
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The timer driver uses get_cycles64() unconditionally to obtain the current
time. A recent refactoring lost the common definition for some configs, which
is now the only one we need.Fixes: d5be89a8d118 ("RISC-V: Resurrect the MMIO timer implementation for M-mode systems")
Reported-by: kernel test robot
Signed-off-by: Palmer Dabbelt
29 Nov, 2020
1 commit
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Pull RISC-V fixes from Palmer Dabbelt:
"I've collected a handful of fixes over the past few weeks:- A fix to un-break the build-id argument to the vDSO build, which is
necessary for the LLVM linker.- A fix to initialize the jump label subsystem, without which it (and
all the stuff that uses it) doesn't actually function.- A fix to include from , without
which some drivers won't compile"* tag 'riscv-for-linus-5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: fix barrier() use in
RISC-V: Add missing jump label initialization
riscv: Explicitly specify the build id style in vDSO Makefile again
26 Nov, 2020
1 commit
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riscv's uses barrier() so it should include
Fixes this build error:
CC [M] drivers/net/ethernet/emulex/benet/be_main.o
In file included from ./include/vdso/processor.h:10,
from ./arch/riscv/include/asm/processor.h:11,
from ./include/linux/prefetch.h:15,
from drivers/net/ethernet/emulex/benet/be_main.c:14:
./arch/riscv/include/asm/vdso/processor.h: In function 'cpu_relax':
./arch/riscv/include/asm/vdso/processor.h:14:2: error: implicit declaration of function 'barrier' [-Werror=implicit-function-declaration]
14 | barrier();This happens with a total of 5 networking drivers -- they all use
.rv64 allmodconfig now builds cleanly after this patch.
Fixes fallout from:
815f0ddb346c ("include/linux/compiler*.h: make compiler-*.h mutually exclusive")Fixes: ad5d1122b82f ("riscv: use vDSO common flow to reduce the latency of the time-related functions")
Reported-by: Andreas Schwab
Signed-off-by: Randy Dunlap
Acked-by: Arvind Sankar
Signed-off-by: Palmer Dabbelt
Reviewed-by: Nick Desaulniers
Signed-off-by: Palmer Dabbelt
16 Nov, 2020
1 commit
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Stefan Agner reported a bug when using zsram on 32-bit Arm machines
with RAM above the 4GB address boundary:Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = a27bd01c
[00000000] *pgd=236a0003, *pmd=1ffa64003
Internal error: Oops: 207 [#1] SMP ARM
Modules linked in: mdio_bcm_unimac(+) brcmfmac cfg80211 brcmutil raspberrypi_hwmon hci_uart crc32_arm_ce bcm2711_thermal phy_generic genet
CPU: 0 PID: 123 Comm: mkfs.ext4 Not tainted 5.9.6 #1
Hardware name: BCM2711
PC is at zs_map_object+0x94/0x338
LR is at zram_bvec_rw.constprop.0+0x330/0xa64
pc : [] lr : [] psr: 60000013
sp : e376bbe0 ip : 00000000 fp : c1e2921c
r10: 00000002 r9 : c1dda730 r8 : 00000000
r7 : e8ff7a00 r6 : 00000000 r5 : 02f9ffa0 r4 : e3710000
r3 : 000fdffe r2 : c1e0ce80 r1 : ebf979a0 r0 : 00000000
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 30c5383d Table: 235c2a80 DAC: fffffffd
Process mkfs.ext4 (pid: 123, stack limit = 0x495a22e6)
Stack: (0xe376bbe0 to 0xe376c000)As it turns out, zsram needs to know the maximum memory size, which
is defined in MAX_PHYSMEM_BITS when CONFIG_SPARSEMEM is set, or in
MAX_POSSIBLE_PHYSMEM_BITS on the x86 architecture.The same problem will be hit on all 32-bit architectures that have a
physical address space larger than 4GB and happen to not enable sparsemem
and include asm/sparsemem.h from asm/pgtable.h.After the initial discussion, I suggested just always defining
MAX_POSSIBLE_PHYSMEM_BITS whenever CONFIG_PHYS_ADDR_T_64BIT is
set, or provoking a build error otherwise. This addresses all
configurations that can currently have this runtime bug, but
leaves all other configurations unchanged.I looked up the possible number of bits in source code and
datasheets, here is what I found:- on ARC, CONFIG_ARC_HAS_PAE40 controls whether 32 or 40 bits are used
- on ARM, CONFIG_LPAE enables 40 bit addressing, without it we never
support more than 32 bits, even though supersections in theory allow
up to 40 bits as well.
- on MIPS, some MIPS32r1 or later chips support 36 bits, and MIPS32r5
XPA supports up to 60 bits in theory, but 40 bits are more than
anyone will ever ship
- On PowerPC, there are three different implementations of 36 bit
addressing, but 32-bit is used without CONFIG_PTE_64BIT
- On RISC-V, the normal page table format can support 34 bit
addressing. There is no highmem support on RISC-V, so anything
above 2GB is unused, but it might be useful to eventually support
CONFIG_ZRAM for high pages.Fixes: 61989a80fb3a ("staging: zsmalloc: zsmalloc memory allocation library")
Fixes: 02390b87a945 ("mm/zsmalloc: Prepare to variable MAX_PHYSMEM_BITS")
Acked-by: Thomas Bogendoerfer
Reviewed-by: Stefan Agner
Tested-by: Stefan Agner
Acked-by: Mike Rapoport
Link: https://lore.kernel.org/linux-mm/bdfa44bf1c570b05d6c70898e2bbb0acf234ecdf.1604762181.git.stefan@agner.ch/
Signed-off-by: Arnd Bergmann
06 Nov, 2020
1 commit
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The copy_from_kernel_nofault() is broken on riscv because the 'dst' and
'src' are mistakenly reversed in __put_kernel_nofault() macro.copy_to_kernel_nofault:
...
0xffffffe0003159b8 : sd a4,0(a1) # a1 aka 'src'Fixes: d464118cdc ("riscv: implement __get_kernel_nofault and __put_user_nofault")
Signed-off-by: Changbin Du
Reviewed-by: Christoph Hellwig
Reviewed-by: Anup Patel
Tested-by: Anup Patel
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
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()
...
05 Oct, 2020
4 commits
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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 -
Implement the non-faulting kernel access helpers directly instead of
abusing the uaccess routines under set_fs(KERNEL_DS).Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
Add new __get_user_nocheck and __put_user_nocheck that switch on the size
and call the actual inline assembly helpers, and move the uaccess enable
/ disable into the actual __get_user and __put_user. This prepares for
natively implementing __get_kernel_nofault and __put_kernel_nofault.Also don't bother with the deprecated register keyword for the error
return.Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt -
This reverts commit adccfb1a805ea84d2db38eb53032533279bdaa97.
Now that the generic uaccess by mempcy code handles unaligned addresses
the generic code can be used for all RISC-V CPUs.Signed-off-by: Christoph Hellwig
Signed-off-by: Palmer Dabbelt
03 Oct, 2020
5 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 -
Add a RISC-V architecture specific stub code that actually copies the
actual kernel image to a valid address and jump to it after boot services
are terminated. Enable UEFI related kernel configs as well for RISC-V.Signed-off-by: Atish Patra
Link: https://lore.kernel.org/r/20200421033336.9663-4-atish.patra@wdc.com
[ardb: - move hartid fetch into check_platform_features()
- use image_size not reserve_size
- select ISA_C
- do not use dram_base]
Signed-off-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
01 Oct, 2020
1 commit
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The NoMMU kernel is broken for QEMU virt machine from Linux-5.9-rc6
because clint_time_val is used even before CLINT driver is probed
at following places:
1. rand_initialize() calls get_cycles() which in-turn uses
clint_time_val
2. boot_init_stack_canary() calls get_cycles() which in-turn
uses clint_time_valThe issue#1 (above) is fixed by providing custom random_get_entropy()
for RISC-V NoMMU kernel. For issue#2 (above), we remove dependency of
boot_init_stack_canary() on get_cycles() and this is aligned with the
boot_init_stack_canary() implementations of ARM, ARM64 and MIPS kernel.Fixes: d5be89a8d118 ("RISC-V: Resurrect the MMIO timer implementation for M-mode systems")
Signed-off-by: Anup Patel
Tested-by: Damien Le Moal
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
20 Sep, 2020
1 commit
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The K210 doesn't implement rdtime in M-mode, and since that's where Linux runs
in the NOMMU systems that means we can't use rdtime. The K210 is the only
system that anyone is currently running NOMMU or M-mode on, so here we're just
inlining the timer read directly.This also adds the CLINT driver as an !MMU dependency, as it's currently the
only timer driver availiable for these systems and without it we get a build
failure for some configurations.Tested-by: Damien Le Moal
Signed-off-by: Palmer Dabbelt
16 Sep, 2020
2 commits
-
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 -
AT_VECTOR_SIZE_ARCH should be defined with the maximum number of
NEW_AUX_ENT entries that ARCH_DLINFO can contain, but it wasn't defined
for RISC-V at all even though ARCH_DLINFO will contain one NEW_AUX_ENT
for the VDSO address.Signed-off-by: Zong Li
Reviewed-by: Palmer Dabbelt
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
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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Pull timekeeping updates from Thomas Gleixner:
"A set of timekeeping/VDSO updates:- Preparatory work to allow S390 to switch over to the generic VDSO
implementation.S390 requires that the VDSO data pointer is handed in to the
counter read function when time namespace support is enabled.
Adding the pointer is a NOOP for all other architectures because
the compiler is supposed to optimize that out when it is unused in
the architecture specific inline. The change also solved a similar
problem for MIPS which fortunately has time namespaces not yet
enabled.S390 needs to update clock related VDSO data independent of the
timekeeping updates. This was solved so far with yet another
sequence counter in the S390 implementation. A better solution is
to utilize the already existing VDSO sequence count for this. The
core code now exposes helper functions which allow to serialize
against the timekeeper code and against concurrent readers.S390 needs extra data for their clock readout function. The initial
common VDSO data structure did not provide a way to add that. It
now has an embedded architecture specific struct embedded which
defaults to an empty struct.Doing this now avoids tree dependencies and conflicts post rc1 and
allows all other architectures which work on generic VDSO support
to work from a common upstream base.- A trivial comment fix"
* tag 'timers-urgent-2020-08-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: Delete repeated words in comments
lib/vdso: Allow to add architecture-specific vdso data
timekeeping/vsyscall: Provide vdso_update_begin/end()
vdso/treewide: Add vdso_data pointer argument to __arch_get_hw_counter()
13 Aug, 2020
2 commits
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segment_eq is only used to implement uaccess_kernel. Just open code
uaccess_kernel in the arch uaccess headers and remove one layer of
indirection.Signed-off-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Acked-by: Linus Torvalds
Acked-by: Greentime Hu
Acked-by: Geert Uytterhoeven
Cc: Nick Hu
Cc: Vincent Chen
Cc: Paul Walmsley
Cc: Palmer Dabbelt
Link: http://lkml.kernel.org/r/20200710135706.537715-5-hch@lst.de
Signed-off-by: Linus Torvalds -
To ensure TASK_SIZE is defined for USER_DS.
Signed-off-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Acked-by: Linus Torvalds
Acked-by: Palmer Dabbelt
Cc: Nick Hu
Cc: Greentime Hu
Cc: Vincent Chen
Cc: Paul Walmsley
Cc: Geert Uytterhoeven
Link: http://lkml.kernel.org/r/20200710135706.537715-4-hch@lst.de
Signed-off-by: Linus Torvalds
08 Aug, 2020
4 commits
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Merge misc updates from Andrew Morton:
- a few MM hotfixes
- kthread, tools, scripts, ntfs and ocfs2
- some of MM
Subsystems affected by this patch series: kthread, tools, scripts, ntfs,
ocfs2 and mm (hofixes, pagealloc, slab-generic, slab, slub, kcsan,
debug, pagecache, gup, swap, shmem, memcg, pagemap, mremap, mincore,
sparsemem, vmalloc, kasan, pagealloc, hugetlb and vmscan).* emailed patches from Andrew Morton : (162 commits)
mm: vmscan: consistent update to pgrefill
mm/vmscan.c: fix typo
khugepaged: khugepaged_test_exit() check mmget_still_valid()
khugepaged: retract_page_tables() remember to test exit
khugepaged: collapse_pte_mapped_thp() protect the pmd lock
khugepaged: collapse_pte_mapped_thp() flush the right range
mm/hugetlb: fix calculation of adjust_range_if_pmd_sharing_possible
mm: thp: replace HTTP links with HTTPS ones
mm/page_alloc: fix memalloc_nocma_{save/restore} APIs
mm/page_alloc.c: skip setting nodemask when we are in interrupt
mm/page_alloc: fallbacks at most has 3 elements
mm/page_alloc: silence a KASAN false positive
mm/page_alloc.c: remove unnecessary end_bitidx for [set|get]_pfnblock_flags_mask()
mm/page_alloc.c: simplify pageblock bitmap access
mm/page_alloc.c: extract the common part in pfn_to_bitidx()
mm/page_alloc.c: replace the definition of NR_MIGRATETYPE_BITS with PB_migratetype_bits
mm/shuffle: remove dynamic reconfiguration
mm/memory_hotplug: document why shuffle_zone() is relevant
mm/page_alloc: remove nr_free_pagecache_pages()
mm: remove vm_total_pages
... -
Most architectures define pgd_free() as a wrapper for free_page().
Provide a generic version in asm-generic/pgalloc.h and enable its use for
most architectures.Signed-off-by: Mike Rapoport
Signed-off-by: Andrew Morton
Reviewed-by: Pekka Enberg
Acked-by: Geert Uytterhoeven [m68k]
Cc: Abdul Haleem
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Christophe Leroy
Cc: Joerg Roedel
Cc: Joerg Roedel
Cc: Max Filippov
Cc: Peter Zijlstra (Intel)
Cc: Satheesh Rajendran
Cc: Stafford Horne
Cc: Stephen Rothwell
Cc: Steven Rostedt
Cc: Matthew Wilcox
Link: http://lkml.kernel.org/r/20200627143453.31835-7-rppt@kernel.org
Signed-off-by: Linus Torvalds -
For most architectures that support >2 levels of page tables,
pmd_alloc_one() is a wrapper for __get_free_pages(), sometimes with
__GFP_ZERO and sometimes followed by memset(0) instead.More elaborate versions on arm64 and x86 account memory for the user page
tables and call to pgtable_pmd_page_ctor() as the part of PMD page
initialization.Move the arm64 version to include/asm-generic/pgalloc.h and use the
generic version on several architectures.The pgtable_pmd_page_ctor() is a NOP when ARCH_ENABLE_SPLIT_PMD_PTLOCK is
not enabled, so there is no functional change for most architectures
except of the addition of __GFP_ACCOUNT for allocation of user page
tables.The pmd_free() is a wrapper for free_page() in all the cases, so no
functional change here.Signed-off-by: Mike Rapoport
Signed-off-by: Andrew Morton
Reviewed-by: Pekka Enberg
Cc: Matthew Wilcox
Cc: Abdul Haleem
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Christophe Leroy
Cc: Joerg Roedel
Cc: Joerg Roedel
Cc: Max Filippov
Cc: Peter Zijlstra (Intel)
Cc: Satheesh Rajendran
Cc: Stafford Horne
Cc: Stephen Rothwell
Cc: Steven Rostedt
Cc: Geert Uytterhoeven
Link: http://lkml.kernel.org/r/20200627143453.31835-5-rppt@kernel.org
Signed-off-by: Linus Torvalds -
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
...
06 Aug, 2020
1 commit
-
MIPS already uses and S390 will need the vdso data pointer in
__arch_get_hw_counter().This works nicely as long as the architecture does not support time
namespaces in the VDSO. With time namespaces enabled the regular
accessor to the vdso data pointer __arch_get_vdso_data() will return the
namespace specific VDSO data page for tasks which are part of a
non-root time namespace. This would cause the architectures which need
the vdso data pointer in __arch_get_hw_counter() to access the wrong
vdso data page.Add a vdso_data pointer argument to __arch_get_hw_counter() and hand it in
from the call sites in the core code. For architectures which do not need
the data pointer in their counter accessor function the compiler will just
optimize it out.Fix up all existing architecture implementations and make MIPS utilize the
pointer instead of invoking the accessor function.No functional change and no change in the resulting object code (except
MIPS).Signed-off-by: Thomas Gleixner
Link: https://lkml.kernel.org/r/draft-87wo2ekuzn.fsf@nanos.tec.linutronix.de
