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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC updates from Olof Johansson:
"A few SoC (code) changes have queued up this cycle, mostly for minor
changes and some refactoring and cleanup of legacy platforms. This
branch also contains a few of the fixes that weren't sent in by the
end of the release (all fairly minor).
- Adding an additional maintainer for the TEE subsystem (Sumit Garg)
- Quite a significant modernization of the IXP4xx platforms by Linus
Walleij, revisiting with a new PCI host driver/binding, removing
legacy mach/* include dependencies and moving platform
detection/config to drivers/soc. Also some updates/cleanup of
platform data.
- Core power domain support for Tegra platforms, and some
improvements in build test coverage by adding stubs for compile
test targets.
- A handful of updates to i.MX platforms, adding legacy (non-PSCI)
SMP support on i.MX7D, SoC ID setup for i.MX50, removal of platform
data and board fixups for iMX6/7.
... and a few smaller changes and fixes for Samsung, OMAP, Allwinner,
Rockchip"
* tag 'arm-soc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (53 commits)
MAINTAINERS: Add myself as TEE subsystem reviewer
ixp4xx: fix spelling mistake in Kconfig "Devce" -> "Device"
hw_random: ixp4xx: Add OF support
hw_random: ixp4xx: Add DT bindings
hw_random: ixp4xx: Turn into a module
hw_random: ixp4xx: Use SPDX license tag
hw_random: ixp4xx: enable compile-testing
pata: ixp4xx: split platform data to its own header
soc: ixp4xx: move cpu detection to linux/soc/ixp4xx/cpu.h
PCI: ixp4xx: Add a new driver for IXP4xx
PCI: ixp4xx: Add device tree bindings for IXP4xx
ARM/ixp4xx: Make NEED_MACH_IO_H optional
ARM/ixp4xx: Move the virtual IObases
MAINTAINERS: ARM/MStar/Sigmastar SoCs: Add a link to the MStar tree
ARM: debug: add UART early console support for MSTAR SoCs
ARM: dts: ux500: Fix LED probing
ARM: imx: add smp support for imx7d
ARM: imx6q: drop of_platform_default_populate() from init_machine
arm64: dts: rockchip: Update RK3399 PCI host bridge window to 32-bit address memory
soc/tegra: fuse: Fix Tegra234-only builds
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock fix from Mike Rapoport:
"This is a fix for the rework of ARM's pfn_valid() implementation
merged during this merge window.
Don't abuse pfn_valid() to check if pfn is in RAM
The semantics of pfn_valid() is to check presence of the memory map
for a PFN and not whether a PFN is in RAM. The memory map may be
present for a hole in the physical memory and if such hole corresponds
to an MMIO range, __arm_ioremap_pfn_caller() will produce a WARN() and
fail.
Use memblock_is_map_memory() instead of pfn_valid() to check if a PFN
is in RAM or not"
* tag 'fixes-2021-07-09' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
arm: ioremap: don't abuse pfn_valid() to check if pfn is in RAM
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Daniel Borkmann says:
====================
pull-request: bpf 2021-07-09
The following pull-request contains BPF updates for your *net* tree.
We've added 9 non-merge commits during the last 9 day(s) which contain
a total of 13 files changed, 118 insertions(+), 62 deletions(-).
The main changes are:
1) Fix runqslower task->state access from BPF, from SanjayKumar Jeyakumar.
2) Fix subprog poke descriptor tracking use-after-free, from John Fastabend.
3) Fix sparse complaint from prior devmap RCU conversion, from Toke Høiland-Jørgensen.
4) Fix missing va_end in bpftool JIT json dump's error path, from Gu Shengxian.
5) Fix tools/bpf install target from missing runqslower install, from Wei Li.
6) Fix xdpsock BPF sample to unload program on shared umem option, from Wang Hai.
====================
Signed-off-by: David S. Miller <[email protected]>
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Pull more block updates from Jens Axboe:
"A combination of changes that ended up depending on both the driver
and core branch (and/or the IDE removal), and a few late arriving
fixes. In detail:
- Fix io ticks wrap-around issue (Chunguang)
- nvme-tcp sock locking fix (Maurizio)
- s390-dasd fixes (Kees, Christoph)
- blk_execute_rq polling support (Keith)
- blk-cgroup RCU iteration fix (Yu)
- nbd backend ID addition (Prasanna)
- Partition deletion fix (Yufen)
- Use blk_mq_alloc_disk for mmc, mtip32xx, ubd (Christoph)
- Removal of now dead block request types due to IDE removal
(Christoph)
- Loop probing and control device cleanups (Christoph)
- Device uevent fix (Christoph)
- Misc cleanups/fixes (Tetsuo, Christoph)"
* tag 'block-5.14-2021-07-08' of git://git.kernel.dk/linux-block: (34 commits)
blk-cgroup: prevent rcu_sched detected stalls warnings while iterating blkgs
block: fix the problem of io_ticks becoming smaller
nvme-tcp: can't set sk_user_data without write_lock
loop: remove unused variable in loop_set_status()
block: remove the bdgrab in blk_drop_partitions
block: grab a device refcount in disk_uevent
s390/dasd: Avoid field over-reading memcpy()
dasd: unexport dasd_set_target_state
block: check disk exist before trying to add partition
ubd: remove dead code in ubd_setup_common
nvme: use return value from blk_execute_rq()
block: return errors from blk_execute_rq()
nvme: use blk_execute_rq() for passthrough commands
block: support polling through blk_execute_rq
block: remove REQ_OP_SCSI_{IN,OUT}
block: mark blk_mq_init_queue_data static
loop: rewrite loop_exit using idr_for_each_entry
loop: split loop_lookup
loop: don't allow deleting an unspecified loop device
loop: move loop_ctl_mutex locking into loop_add
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Merging in the last batch of fixes that didn't go in before previous
release, just a few smaller DT fixups and a MAINTAINERS update
* arm/fixes: (29 commits)
MAINTAINERS: Add myself as TEE subsystem reviewer
ARM: dts: ux500: Fix LED probing
arm64: dts: rockchip: Update RK3399 PCI host bridge window to 32-bit address memory
arm64: dts: allwinner: a64-sopine-baseboard: change RGMII mode to TXID
arm64: meson: select COMMON_CLK
soc: amlogic: meson-clk-measure: remove redundant dev_err call in meson_msr_probe()
ARM: dts: qcom: sdx55-telit: Represent secure-regions as 64-bit elements
ARM: dts: qcom: sdx55-t55: Represent secure-regions as 64-bit elements
ARM: dts: sun8i: h3: orangepi-plus: Fix ethernet phy-mode
ARM: dts: imx: emcon-avari: Fix nxp,pca8574 #gpio-cells
ARM: dts: imx7d-pico: Fix the 'tuning-step' property
ARM: dts: imx7d-meerkat96: Fix the 'tuning-step' property
arm64: dts: freescale: sl28: var1: fix RGMII clock and voltage
arm64: dts: freescale: sl28: var4: fix RGMII clock and voltage
ARM: imx: pm-imx27: Include "common.h"
arm64: dts: zii-ultra: fix 12V_MAIN voltage
arm64: dts: zii-ultra: remove second GEN_3V3 regulator instance
arm64: dts: ls1028a: fix memory node
optee: use export_uuid() to copy client UUID
arm64: dts: ti: k3*: Introduce reg definition for interrupt routers
...
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt:
"We have a handful of new features for 5.14:
- Support for transparent huge pages.
- Support for generic PCI resources mapping.
- Support for the mem= kernel parameter.
- Support for KFENCE.
- A handful of fixes to avoid W+X mappings in the kernel.
- Support for VMAP_STACK based overflow detection.
- An optimized copy_{to,from}_user"
* tag 'riscv-for-linus-5.14-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (37 commits)
riscv: xip: Fix duplicate included asm/pgtable.h
riscv: Fix PTDUMP output now BPF region moved back to module region
riscv: __asm_copy_to-from_user: Optimize unaligned memory access and pipeline stall
riscv: add VMAP_STACK overflow detection
riscv: ptrace: add argn syntax
riscv: mm: fix build errors caused by mk_pmd()
riscv: Introduce structure that group all variables regarding kernel mapping
riscv: Map the kernel with correct permissions the first time
riscv: Introduce set_kernel_memory helper
riscv: Enable KFENCE for riscv64
RISC-V: Use asm-generic for {in,out}{bwlq}
riscv: add ASID-based tlbflushing methods
riscv: pass the mm_struct to __sbi_tlb_flush_range
riscv: Add mem kernel parameter support
riscv: Simplify xip and !xip kernel address conversion macros
riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED
riscv: Only initialize swiotlb when necessary
riscv: fix typo in init.c
riscv: Cleanup unused functions
riscv: mm: Use better bitmap_zalloc()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Fix crashes on 64-bit Book3E due to use of Book3S only mtmsrd
instruction.
Fix "scheduling while atomic" warnings at boot due to preempt count
underflow.
Two commits fixing our handling of BPF atomic instructions.
Fix error handling in xive when allocating an IPI.
Fix lockup on kernel exec fault on 603.
Thanks to Bharata B Rao, Cédric Le Goater, Christian Zigotzky,
Christophe Leroy, Guenter Roeck, Jiri Olsa, Naveen N. Rao, Nicholas
Piggin, and Valentin Schneider"
* tag 'powerpc-5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/preempt: Don't touch the idle task's preempt_count during hotplug
powerpc/64e: Fix system call illegal mtmsrd instruction
powerpc/xive: Fix error handling when allocating an IPI
powerpc/bpf: Reject atomic ops in ppc32 JIT
powerpc/bpf: Fix detecting BPF atomic instructions
powerpc/mm: Fix lockup on kernel exec fault
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
Pull UML updates from Richard Weinberger:
- Support for optimized routines based on the host CPU
- Support for PCI via virtio
- Various fixes
* tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: remove unneeded semicolon in um_arch.c
um: Remove the repeated declaration
um: fix error return code in winch_tramp()
um: fix error return code in slip_open()
um: Fix stack pointer alignment
um: implement flush_cache_vmap/flush_cache_vunmap
um: add a UML specific futex implementation
um: enable the use of optimized xor routines in UML
um: Add support for host CPU flags and alignment
um: allow not setting extra rpaths in the linux binary
um: virtio/pci: enable suspend/resume
um: add PCI over virtio emulation driver
um: irqs: allow invoking time-travel handler multiple times
um: time-travel/signals: fix ndelay() in interrupt
um: expose time-travel mode to userspace side
um: export signals_enabled directly
um: remove unused smp_sigio_handler() declaration
lib: add iomem emulation (logic_iomem)
um: allow disabling NO_IOMEM
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Pull yet more updates from Andrew Morton:
"54 patches.
Subsystems affected by this patch series: lib, mm (slub, secretmem,
cleanups, init, pagemap, and mremap), and debug"
* emailed patches from Andrew Morton <[email protected]>: (54 commits)
powerpc/mm: enable HAVE_MOVE_PMD support
powerpc/book3s64/mm: update flush_tlb_range to flush page walk cache
mm/mremap: allow arch runtime override
mm/mremap: hold the rmap lock in write mode when moving page table entries.
mm/mremap: use pmd/pud_poplulate to update page table entries
mm/mremap: don't enable optimized PUD move if page table levels is 2
mm/mremap: convert huge PUD move to separate helper
selftest/mremap_test: avoid crash with static build
selftest/mremap_test: update the test to handle pagesize other than 4K
mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *
mm: rename pud_page_vaddr to pud_pgtable and make it return pmd_t *
kdump: use vmlinux_build_id to simplify
buildid: fix kernel-doc notation
buildid: mark some arguments const
scripts/decode_stacktrace.sh: indicate 'auto' can be used for base path
scripts/decode_stacktrace.sh: silence stderr messages from addr2line/nm
scripts/decode_stacktrace.sh: support debuginfod
x86/dumpstack: use %pSb/%pBb for backtrace printing
arm64: stacktrace: use %pSb for backtrace printing
module: add printk formats to add module build ID to stacktraces
...
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As of commit c7289b1c8a4e ("arm64: tegra: Enable SMMU support on
Tegra194"), SMMU support is enabled system-wide on Tegra194. However,
there was a bit of overlap between the SMMU enablement and the USB
support addition, so the USB device tree nodes are missing the iommus
and interconnects properties. This in turn leads to SMMU faults for
these devices, since by default the ARM SMMU will fault.
Add the iommus and interconnects properties to the XUSB and XUDC device
tree nodes to restore their functionality.
Fixes: c7289b1c8a4e ("arm64: tegra: Enable SMMU support on Tegra194")
Reviewed-by: Jon Hunter <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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Add iommus and interconnects properties to the sound device tree node on
Tegra194. This ensures that the correct SID is used for translation of
physical to I/O virtual addresses and that the path to system memory is
properly described, which in turn can impact the range of memory that
the device can address.
Fixes: c7289b1c8a4e ("arm64: tegra: Enable SMMU support on Tegra194")
Reviewed-by: Jon Hunter <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip fixes from Marc Zyngier:
- Fix a MIPS bug where irqdomain loopkups could occur in a context
where RCU is not allowed
- Fix a documentation bug for handle_domain_irq
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Accessing raw timers (currently only CLOCK_MONOTONIC_RAW) through VDSO
doesn't return the correct time when using the GIC as clock source.
The address of the GIC mapped page is in this case not calculated
correctly. The GIC mapped page is calculated from the VDSO data by
subtracting PAGE_SIZE:
void *get_gic(const struct vdso_data *data) {
return (void __iomem *)data - PAGE_SIZE;
}
However, the data pointer is not page aligned for raw clock sources.
This is because the VDSO data for raw clock sources (CS_RAW = 1) is
stored after the VDSO data for coarse clock sources (CS_HRES_COARSE = 0).
Therefore, only the VDSO data for CS_HRES_COARSE is page aligned:
+--------------------+
| |
| vd[CS_RAW] | ---+
| vd[CS_HRES_COARSE] | |
+--------------------+ | -PAGE_SIZE
| | |
| GIC mapped page | <--+
| |
+--------------------+
When __arch_get_hw_counter() is called with &vd[CS_RAW], get_gic returns
the wrong address (somewhere inside the GIC mapped page). The GIC counter
values are not returned which results in an invalid time.
Fixes: a7f4df4e21dd ("MIPS: VDSO: Add implementations of gettimeofday() and clock_gettime()")
Signed-off-by: Martin Fäcknitz <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>
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Subprograms are calling map_poke_track(), but on program release there is no
hook to call map_poke_untrack(). However, on program release, the aux memory
(and poke descriptor table) is freed even though we still have a reference to
it in the element list of the map aux data. When we run map_poke_run(), we then
end up accessing free'd memory, triggering KASAN in prog_array_map_poke_run():
[...]
[ 402.824689] BUG: KASAN: use-after-free in prog_array_map_poke_run+0xc2/0x34e
[ 402.824698] Read of size 4 at addr ffff8881905a7940 by task hubble-fgs/4337
[ 402.824705] CPU: 1 PID: 4337 Comm: hubble-fgs Tainted: G I 5.12.0+ #399
[ 402.824715] Call Trace:
[ 402.824719] dump_stack+0x93/0xc2
[ 402.824727] print_address_description.constprop.0+0x1a/0x140
[ 402.824736] ? prog_array_map_poke_run+0xc2/0x34e
[ 402.824740] ? prog_array_map_poke_run+0xc2/0x34e
[ 402.824744] kasan_report.cold+0x7c/0xd8
[ 402.824752] ? prog_array_map_poke_run+0xc2/0x34e
[ 402.824757] prog_array_map_poke_run+0xc2/0x34e
[ 402.824765] bpf_fd_array_map_update_elem+0x124/0x1a0
[...]
The elements concerned are walked as follows:
for (i = 0; i < elem->aux->size_poke_tab; i++) {
poke = &elem->aux->poke_tab[i];
[...]
The access to size_poke_tab is a 4 byte read, verified by checking offsets
in the KASAN dump:
[ 402.825004] The buggy address belongs to the object at ffff8881905a7800
which belongs to the cache kmalloc-1k of size 1024
[ 402.825008] The buggy address is located 320 bytes inside of
1024-byte region [ffff8881905a7800, ffff8881905a7c00)
The pahole output of bpf_prog_aux:
struct bpf_prog_aux {
[...]
/* --- cacheline 5 boundary (320 bytes) --- */
u32 size_poke_tab; /* 320 4 */
[...]
In general, subprograms do not necessarily manage their own data structures.
For example, BTF func_info and linfo are just pointers to the main program
structure. This allows reference counting and cleanup to be done on the latter
which simplifies their management a bit. The aux->poke_tab struct, however,
did not follow this logic. The initial proposed fix for this use-after-free
bug further embedded poke data tracking into the subprogram with proper
reference counting. However, Daniel and Alexei questioned why we were treating
these objects special; I agree, its unnecessary. The fix here removes the per
subprogram poke table allocation and map tracking and instead simply points
the aux->poke_tab pointer at the main programs poke table. This way, map
tracking is simplified to the main program and we do not need to manage them
per subprogram.
This also means, bpf_prog_free_deferred(), which unwinds the program reference
counting and kfrees objects, needs to ensure that we don't try to double free
the poke_tab when free'ing the subprog structures. This is easily solved by
NULL'ing the poke_tab pointer. The second detail is to ensure that per
subprogram JIT logic only does fixups on poke_tab[] entries it owns. To do
this, we add a pointer in the poke structure to point at the subprogram value
so JITs can easily check while walking the poke_tab structure if the current
entry belongs to the current program. The aux pointer is stable and therefore
suitable for such comparison. On the jit_subprogs() error path, we omit
cleaning up the poke->aux field because these are only ever referenced from
the JIT side, but on error we will never make it to the JIT, so its fine to
leave them dangling. Removing these pointers would complicate the error path
for no reason. However, we do need to untrack all poke descriptors from the
main program as otherwise they could race with the freeing of JIT memory from
the subprograms. Lastly, a748c6975dea3 ("bpf: propagate poke descriptors to
subprograms") had an off-by-one on the subprogram instruction index range
check as it was testing 'insn_idx >= subprog_start && insn_idx <= subprog_end'.
However, subprog_end is the next subprogram's start instruction.
Fixes: a748c6975dea3 ("bpf: propagate poke descriptors to subprograms")
Signed-off-by: John Fastabend <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Co-developed-by: Daniel Borkmann <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Since d4a45c68dc81 ("irqdomain: Protect the linear revmap with RCU"),
any irqdomain lookup requires the RCU read lock to be held.
This assumes that the architecture code will be structured such as
irq_enter() will be called *before* the interrupt is looked up
in the irq domain. However, this isn't the case for MIPS, and a number
of drivers are structured to do it the other way around when handling
an interrupt in their root irqchip (secondary irqchips are OK by
construction).
This results in a RCU splat on a lockdep-enabled kernel when the kernel
takes an interrupt from idle, as reported by Guenter Roeck.
Note that this could have fired previously if any driver had used
tree-based irqdomain, which always had the RCU requirement.
To solve this, provide a MIPS-specific helper (do_domain_IRQ())
as the pendent of do_IRQ() that will do thing in the right order
(and maybe save some cycles in the process).
Ideally, MIPS would be moved over to using handle_domain_irq(),
but that's much more ambitious.
Reported-by: Guenter Roeck <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
[maz: add dependency on CONFIG_IRQ_DOMAIN after report from the kernelci bot]
Signed-off-by: Marc Zyngier <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Serge Semin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected]
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S390's init_idle_preempt_count(p, cpu) doesn't actually let us initialize the
preempt_count of the requested CPU's idle task: it unconditionally writes
to the current CPU's. This clearly conflicts with idle_threads_init(),
which intends to initialize *all* the idle tasks, including their
preempt_count (or their CPU's, if the arch uses a per-CPU preempt_count).
Unfortunately, it seems the way s390 does things doesn't let us initialize
every possible CPU's preempt_count early on, as the pages where this
resides are only allocated when a CPU is brought up and are freed when it
is brought down.
Let the arch-specific code set a CPU's preempt_count when its lowcore is
allocated, and turn init_idle_preempt_count() into an empty stub.
Fixes: f1a0a376ca0c ("sched/core: Initialize the idle task with preemption disabled")
Reported-by: Guenter Roeck <[email protected]>
Signed-off-by: Valentin Schneider <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Reviewed-by: Heiko Carstens <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vasily Gorbik <[email protected]>
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Both clang and gcc (for -march=z13 and later) align functions to 16
bytes at -O2 to benefit branch prediction.
Make asm symbols alignment consistent with that.
This also benefits potential ftrace code patching, which is currently
able to patch 8 aligned bytes at once.
With defconfig this currently increases .text size by 4104 bytes.
Reviewed-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Lower case matches the call_on_stack() macro and is easier to read.
Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Make sure the to be called function takes no arguments (and returns void).
Otherwise usage of CALL_ON_STACK_NORETURN() would generate broken code.
Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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The existing CALL_ON_STACK() macro allows for subtle bugs:
- There is no type checking of the function that is being called. That
is: missing or too many arguments do not cause any compile error or
warning. The same is true if the return type of the called function
changes. This can lead to quite random bugs.
- Sign and zero extension of arguments is missing. Given that the s390
C ABI requires that the caller of a function performs proper sign
and zero extension this can also lead to subtle bugs.
- If arguments to the CALL_ON_STACK() macros contain functions calls
register corruption can happen due to register asm constructs being
used.
Therefore introduce a new call_on_stack() macro which is supposed to
fix all these problems.
Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Make on_async_stack() a bit more readable, even though as usual it
depends if one considers "!!!" readable or not.
At least the new construct to check if the async stack is in use or
not is a bit shorter and generates slightly better code.
Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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Move do_softirq_own_stack() to proper header file so it can be
inlined; saving a few cycles.
Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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do_softirq_own_stack() is always called from task context and
therefore it is not necessary to check if the async stack is
currently used.
Remove the check and directly switch to async stack.
Reviewed-by: Sven Schnelle <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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This is the second part of the cleanup for the header file ap.h
to remove the register asm statements. This patch deals with
the inline ap_dqap() function where within the assembler code
an odd register of an register pair is to be addressed.
[[email protected]: this intentionally breaks compilation with any
clang compilers prior to llvm-project commit 458eac257377 ("[SystemZ]
Support the 'N' code for the odd register in inline-asm.").
This is hopefully the last clang kernel compile breakage caused by
incompatibilities between gcc and clang.]
Signed-off-by: Harald Freudenberger <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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PIF_SYSCALL_RESTART is now only used to restart execve when loading
PGSTE binaries. Rename the flag to reflect that, and avoid people
thinking that this bit has anything to do with generic syscall
restarting.
Signed-off-by: Sven Schnelle <[email protected]>
Reviewed-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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On s390, execve might have to be restarted for PGSTE binaries
like kvm. In the past this was done via the PIF_SYSCALL_RESTART
bit. However, with the recent changes, syscalls are now restarted
differently. Now that execve() is the only call that might get
restarted via PIF_SYSCALL_RESTART, move the loop to do_syscall().
This also has the advantage that the restart is no longer visible
to userspace.
Signed-off-by: Sven Schnelle <[email protected]>
Reviewed-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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{rt_}sigreturn is now called from the vdso, so we no longer
need the svc on the stack, and therefore no hack to support that
mechanism on machines with non-executable stack.
Signed-off-by: Sven Schnelle <[email protected]>
Reviewed-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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with generic entry, there's a bug when it comes to restarting of signals.
The failing sequence is:
a) a signal is coming in, and no handler is registered, so the lower
part of arch_do_signal_or_restart() in arch/s390/kernel/signal.c
sets PIF_SYSCALL_RESTART.
b) a second signal gets pending while the kernel is still in the exit
loop, and for that one, a handler exists.
c) The first part of arch_do_signal_or_restart() is called. That part
calls handle_signal(), which sets up stack + registers for handling
the signal.
d) __do_syscall() in arch/s390/kernel/syscall.c checks for
PIF_SYSCALL_RESTART right before leaving to userspace. If it is set,
it restart's the syscall. However, the registers are already setup
for handling a signal from c). The syscall is now restarted with the
wrong arguments.
Change the code to:
- use vdso for syscall_restart() instead of PIF_SYSCALL_RESTART because
we cannot rewind and go back to userspace on s390 because the system call
number might be encoded in the svc instruction.
- for all other syscalls we rewind the PSW and return to userspace.
Cc: <[email protected]> # v5.12+ d57778feb987: s390/vdso: always enable vdso
Cc: <[email protected]> # v5.12+ 686341f2548b: s390/vdso64: add sigreturn,rt_sigreturn and restart_syscall
Cc: <[email protected]> # v5.12+ 43e1f76b0b69: s390/vdso: rename VDSO64_LBASE to VDSO_LBASE
Cc: <[email protected]> # v5.12+ 779df2248739: s390/vdso: add minimal compat vdso
Cc: <[email protected]> # v5.12+
Signed-off-by: Sven Schnelle <[email protected]>
Reviewed-by: Heiko Carstens <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull pci updates from Bjorn Helgaas:
"Enumeration:
- Fix dsm_label_utf16s_to_utf8s() buffer overrun (Krzysztof
Wilczyński)
- Rely on lengths from scnprintf(), dsm_label_utf16s_to_utf8s()
(Krzysztof Wilczyński)
- Use sysfs_emit() and sysfs_emit_at() in "show" functions (Krzysztof
Wilczyński)
- Fix 'resource_alignment' newline issues (Krzysztof Wilczyński)
- Add 'devspec' newline (Krzysztof Wilczyński)
- Dynamically map ECAM regions (Russell King)
Resource management:
- Coalesce host bridge contiguous apertures (Kai-Heng Feng)
PCIe native device hotplug:
- Ignore Link Down/Up caused by DPC (Lukas Wunner)
Power management:
- Leave Apple Thunderbolt controllers on for s2idle or standby
(Konstantin Kharlamov)
Virtualization:
- Work around Huawei Intelligent NIC VF FLR erratum (Chiqijun)
- Clarify error message for unbound IOV devices (Moritz Fischer)
- Add pci_reset_bus_function() Secondary Bus Reset interface (Raphael
Norwitz)
Peer-to-peer DMA:
- Simplify distance calculation (Christoph Hellwig)
- Finish RCU conversion of pdev->p2pdma (Eric Dumazet)
- Rename upstream_bridge_distance() and rework doc (Logan Gunthorpe)
- Collect acs list in stack buffer to avoid sleeping (Logan
Gunthorpe)
- Use correct calc_map_type_and_dist() return type (Logan Gunthorpe)
- Warn if host bridge not in whitelist (Logan Gunthorpe)
- Refactor pci_p2pdma_map_type() (Logan Gunthorpe)
- Avoid pci_get_slot(), which may sleep (Logan Gunthorpe)
Altera PCIe controller driver:
- Add Joyce Ooi as Altera PCIe maintainer (Joyce Ooi)
Broadcom iProc PCIe controller driver:
- Fix multi-MSI base vector number allocation (Sandor Bodo-Merle)
- Support multi-MSI only on uniprocessor kernel (Sandor Bodo-Merle)
Freescale i.MX6 PCIe controller driver:
- Limit DBI register length for imx6qp PCIe (Richard Zhu)
- Add "vph-supply" for PHY supply voltage (Richard Zhu)
- Enable PHY internal regulator when supplied >3V (Richard Zhu)
- Remove imx6_pcie_probe() redundant error message (Zhen Lei)
Intel Gateway PCIe controller driver:
- Fix INTx enable (Martin Blumenstingl)
Marvell Aardvark PCIe controller driver:
- Fix checking for PIO Non-posted Request (Pali Rohár)
- Implement workaround for the readback value of VEND_ID (Pali Rohár)
MediaTek PCIe controller driver:
- Remove redundant error printing in mtk_pcie_subsys_powerup() (Zhen
Lei)
MediaTek PCIe Gen3 controller driver:
- Add missing MODULE_DEVICE_TABLE (Zou Wei)
Microchip PolarFlare PCIe controller driver:
- Make struct event_descs static (Krzysztof Wilczyński)
Microsoft Hyper-V host bridge driver:
- Fix race condition when removing the device (Long Li)
- Remove bus device removal unused refcount/functions (Long Li)
Mobiveil PCIe controller driver:
- Remove unused readl and writel functions (Krzysztof Wilczyński)
NVIDIA Tegra PCIe controller driver:
- Add missing MODULE_DEVICE_TABLE (Zou Wei)
NVIDIA Tegra194 PCIe controller driver:
- Fix tegra_pcie_ep_raise_msi_irq() ill-defined shift (Jon Hunter)
- Fix host initialization during resume (Vidya Sagar)
Rockchip PCIe controller driver:
- Register IRQ handlers after device and data are ready (Javier
Martinez Canillas)"
* tag 'pci-v5.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits)
PCI/P2PDMA: Finish RCU conversion of pdev->p2pdma
PCI: xgene: Annotate __iomem pointer
PCI: Fix kernel-doc formatting
PCI: cpcihp: Declare cpci_debug in header file
MAINTAINERS: Add Joyce Ooi as Altera PCIe maintainer
PCI: rockchip: Register IRQ handlers after device and data are ready
PCI: tegra194: Fix tegra_pcie_ep_raise_msi_irq() ill-defined shift
PCI: aardvark: Implement workaround for the readback value of VEND_ID
PCI: aardvark: Fix checking for PIO Non-posted Request
PCI: tegra194: Fix host initialization during resume
PCI: tegra: Add missing MODULE_DEVICE_TABLE
PCI: imx6: Enable PHY internal regulator when supplied >3V
dt-bindings: imx6q-pcie: Add "vph-supply" for PHY supply voltage
PCI: imx6: Limit DBI register length for imx6qp PCIe
PCI: imx6: Remove imx6_pcie_probe() redundant error message
PCI: intel-gw: Fix INTx enable
PCI: iproc: Support multi-MSI only on uniprocessor kernel
PCI: iproc: Fix multi-MSI base vector number allocation
PCI: mediatek-gen3: Add missing MODULE_DEVICE_TABLE
PCI: Dynamically map ECAM regions
...
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mremap HAVE_MOVE_PMD/PUD optimization time comparison for 1GB region:
1GB mremap - Source PTE-aligned, Destination PTE-aligned
mremap time: 2292772ns
1GB mremap - Source PMD-aligned, Destination PMD-aligned
mremap time: 1158928ns
1GB mremap - Source PUD-aligned, Destination PUD-aligned
mremap time: 63886ns
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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flush_tlb_range is special in that we don't specify the page size used for
the translation. Hence when flushing TLB we flush the translation cache
for all possible page sizes. The kernel also uses the same interface when
moving page tables around. Such a move requires us to flush the page walk
cache.
Instead of adding another interface to force page walk cache flush, update
flush_tlb_range to flush page walk cache if the range flushed is more than
the PMD range. A page table move will always involve an invalidate range
more than PMD_SIZE.
Running microbenchmark with mprotect and parallel memory access didn't
show any observable performance impact.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Patch series "Speedup mremap on ppc64", v8.
This patchset enables MOVE_PMD/MOVE_PUD support on power. This requires
the platform to support updating higher-level page tables without updating
page table entries. This also needs to invalidate the Page Walk Cache on
architecture supporting the same.
This patch (of 3):
Architectures like ppc64 support faster mremap only with radix
translation. Hence allow a runtime check w.r.t support for fast mremap.
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: "Aneesh Kumar K . V" <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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No functional change in this patch.
[[email protected]: m68k build error reported by kernel robot]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lore.kernel.org/linuxppc-dev/CAHk-=wi+J+iodze9FtjM3Zi4j4OeS+qqbKxME9QN4roxPEXH9Q@mail.gmail.com/
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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No functional change in this patch.
[[email protected]: fix]
Link: https://lkml.kernel.org/r/[email protected]
[[email protected]: another fix]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lore.kernel.org/linuxppc-dev/CAHk-=wi+J+iodze9FtjM3Zi4j4OeS+qqbKxME9QN4roxPEXH9Q@mail.gmail.com/
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Stephen Rothwell <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Kalesh Singh <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Let's use the new printk formats to print the stacktrace entries when
printing a backtrace to the kernel logs. This will include any module's
build ID[1] in it so that offline/crash debugging can easily locate the
debuginfo for a module via something like debuginfod[2].
Link: https://lkml.kernel.org/r/[email protected]
Link: https://fedoraproject.org/wiki/Releases/FeatureBuildId [1]
Link: https://sourceware.org/elfutils/Debuginfod.html [2]
Signed-off-by: Stephen Boyd <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Jessica Yu <[email protected]>
Cc: Evan Green <[email protected]>
Cc: Hsin-Yi Wang <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Konstantin Khlebnikov <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Cc: Sasha Levin <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
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Let's use the new printk format to print the stacktrace entry when
printing a backtrace to the kernel logs. This will include any module's
build ID[1] in it so that offline/crash debugging can easily locate the
debuginfo for a module via something like debuginfod[2].
Link: https://lkml.kernel.org/r/[email protected]
Link: https://fedoraproject.org/wiki/Releases/FeatureBuildId [1]
Link: https://sourceware.org/elfutils/Debuginfod.html [2]
Signed-off-by: Stephen Boyd <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Jessica Yu <[email protected]>
Cc: Evan Green <[email protected]>
Cc: Hsin-Yi Wang <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Konstantin Khlebnikov <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Cc: Sasha Levin <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vivek Goyal <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
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Use setup_initial_init_mm() helper to simplify code.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
|
Use setup_initial_init_mm() helper to simplify code.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: Rich Felker <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
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Use setup_initial_init_mm() helper to simplify code.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
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Use setup_initial_init_mm() helper to simplify code.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Acked-by: Palmer Dabbelt <[email protected]>
Cc: Paul Walmsley <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
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Use setup_initial_init_mm() helper to simplify code.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Souptick Joarder <[email protected]>
Cc: Christophe Leroy <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
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Use setup_initial_init_mm() helper to simplify code.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Acked-by: Stafford Horne <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Stefan Kristiansson <[email protected]>
Cc: Stafford Horne <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|
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Use setup_initial_init_mm() helper to simplify code.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kefeng Wang <[email protected]>
Cc: Ley Foon Tan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
|