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Merge tag 'io_uring-6.0-2022-08-13' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
- Regression fix for this merge window, fixing a wrong order of
arguments for io_req_set_res() for passthru (Dylan)
- Fix for the audit code leaking context memory (Peilin)
- Ensure that provided buffers are memcg accounted (Pavel)
- Correctly handle short zero-copy sends (Pavel)
- Sparse warning fixes for the recvmsg multishot command (Dylan)
- Error handling fix for passthru (Anuj)
- Remove randomization of struct kiocb fields, to avoid it growing in
size if re-arranged in such a fashion that it grows more holes or
padding (Keith, Linus)
- Small series improving type safety of the sqe fields (Stefan)
* tag 'io_uring-6.0-2022-08-13' of git://git.kernel.dk/linux-block:
io_uring: add missing BUILD_BUG_ON() checks for new io_uring_sqe fields
io_uring: make io_kiocb_to_cmd() typesafe
fs: don't randomize struct kiocb fields
io_uring: consistently make use of io_notif_to_data()
io_uring: fix error handling for io_uring_cmd
io_uring: fix io_recvmsg_prep_multishot sparse warnings
io_uring/net: send retry for zerocopy
io_uring: mem-account pbuf buckets
audit, io_uring, io-wq: Fix memory leak in io_sq_thread() and io_wqe_worker()
io_uring: pass correct parameters to io_req_set_res
There's still a handful of new features in here, but there are a lot of
fixes/cleanups as well:
* Support for the Zicbom for explicit cache-block management, along with
the necessary bits to make the non-standard cache management ops on
the Allwinner D1 function.
* Support for the Zihintpause extension, which codifies a go-slow
instruction used for cpu_relax().
* Support for the Sstc extension for supervisor-mode timer/counter
management.
* Many device tree fixes and cleanups, including a large set for the
Canaan device trees.
* A handful of fixes and cleanups for the PMU driver.
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Merge tag 'riscv-for-linus-5.20-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull more RISC-V updates from Palmer Dabbelt:
"There's still a handful of new features in here, but there are a lot
of fixes/cleanups as well:
- Support for the Zicbom extension for explicit cache-block
management, along with the necessary bits to make the non-standard
cache management ops on the Allwinner D1 function
- Support for the Zihintpause extension, which codifies a go-slow
instruction used for cpu_relax()
- Support for the Sstc extension for supervisor-mode timer/counter
management
- Many device tree fixes and cleanups, including a large set for the
Canaan device trees
- A handful of fixes and cleanups for the PMU driver"
* tag 'riscv-for-linus-5.20-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (43 commits)
dt-bindings: gpio: sifive: add gpio-line-names
wireguard: selftests: set CONFIG_NONPORTABLE on riscv32
RISC-V: KVM: Support sstc extension
RISC-V: Improve SBI definitions
RISC-V: Move counter info definition to sbi header file
RISC-V: Fix SBI PMU calls for RV32
RISC-V: Update user page mapping only once during start
RISC-V: Fix counter restart during overflow for RV32
RISC-V: Prefer sstc extension if available
RISC-V: Enable sstc extension parsing from DT
RISC-V: Add SSTC extension CSR details
riscv:uprobe fix SR_SPIE set/clear handling
dt-bindings: riscv: fix SiFive l2-cache's cache-sets
riscv: ensure cpu_ops_sbi is declared
RISC-V: cpu_ops_spinwait.c should include head.h
RISC-V: Declare cpu_ops_spinwait in <asm/cpu_ops.h>
riscv: dts: starfive: correct number of external interrupts
riscv: dts: sifive unmatched: Add PWM controlled LEDs
riscv/purgatory: Omit use of bin2c
riscv/purgatory: hard-code obj-y in Makefile
...
- Fix schema warnings in qcom,ipq6018-pinctrl and sdhci-msm
- Convert Qualcomm SPMI PMIC to DT schema
- Make secure interrupt optional for arm,mhu
- Fix google,cros-ec-typec binding allowed properties
- Update a bunch of bouncing email addresses
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Merge tag 'devicetree-fixes-for-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:
- Fix schema warnings in qcom,ipq6018-pinctrl and sdhci-msm
- Convert Qualcomm SPMI PMIC to DT schema
- Make secure interrupt optional for arm,mhu
- Fix google,cros-ec-typec binding allowed properties
- Update a bunch of bouncing email addresses
* tag 'devicetree-fixes-for-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
dt-bindings: chrome: google,cros-ec-typec: restrict allowed properties
dt-bindings: Drop Dan Murphy and Ricardo Rivera-Matos
dt-bindings: Drop Robert Jones
dt-bindings: Drop Beniamin Bia and Stefan Popa
dt-bindings: iio: Drop Bogdan Pricop
dt-bindings: iio: Drop Joachim Eastwood
dt-bindings: mailbox: arm,mhu: Make secure interrupt optional
dt-bindings: pinctrl: qcom,ipq6018: Fix example 'gpio-ranges' size
dt-bindings: Drop DT_MK_SCHEMA_FLAGS conditional selecting schema files
dt-bindings: mfd: convert to yaml Qualcomm SPMI PMIC
dt-bindings: mmc: sdhci-msm: Fix 'operating-points-v2 was unexpected' issue
dt-bindings: display: simple-framebuffer: Drop Bartlomiej Zolnierkiewicz
This is a size sensitive structure and randomizing can introduce extra
padding that breaks io_uring's fixed size expectations. There are few
fields here as it is, half of which need a fixed order to optimally
pack, so the randomization isn't providing much.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/io-uring/b6f508ca-b1b2-5f40-7998-e4cff1cf7212@kernel.dk/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Describe exactly what properties are allowed in Google Chrome OS EC Type
C port, so the schema can properly validate the DTS. Existing DTS
defines always connectors with unit addresses, not a sole "connector"
child.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220811062245.4316-1-krzysztof.kozlowski@linaro.org
Emails to Dan Murphy and Ricardo Rivera-Matos bounce ("550 Invalid
recipient"). Andrew Davis agreed to take over the bindings.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Andrew Davis <afd@ti.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220809162752.10186-6-krzysztof.kozlowski@linaro.org
Emails to Robert Jones bounce ("550 5.2.1 The email account that you
tried to reach is disabled").
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220809162752.10186-5-krzysztof.kozlowski@linaro.org
Emails to Beniamin Bia and Stefan Popa bounce ("550 5.1.10
RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address
lookup").
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220809162752.10186-4-krzysztof.kozlowski@linaro.org
Emails to Joachim Eastwood bounce ("552 5.2.2 The email account that you
tried to reach is over quota and inactive.").
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220809162752.10186-2-krzysztof.kozlowski@linaro.org
Includes a few usual updates for HD- and USB-audio and a trivial
cleanup patch.
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Merge tag 'sound-fix-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Includes a few usual updates for HD- and USB-audio and a trivial
cleanup patch"
* tag 'sound-fix-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda: Fix crash due to jack poll in suspend
ALSA: hda/cirrus - support for iMac 12,1 model
ALSA: usb-audio: make read-only array marker static const
ALSA: hda/realtek: Add a quirk for HP OMEN 15 (8786) mute LED
ALSA: usb-audio: More comprehensive mixer map for ASUS ROG Zenith II
ALSA: scarlett2: Add Focusrite Clarett+ 8Pre support
ALSA: hda/conexant: Add quirk for LENOVO 20149 Notebook model
ALSA: ice1712: remove redundant assignment to new
ALSA: hda/realtek: Add quirk for another Asus K42JZ model
A huge patchset supporting vq resize using the
new vq reset capability.
Features, fixes, cleanups all over the place.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
- A huge patchset supporting vq resize using the new vq reset
capability
- Features, fixes, and cleanups all over the place
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (88 commits)
vdpa/mlx5: Fix possible uninitialized return value
vdpa_sim_blk: add support for discard and write-zeroes
vdpa_sim_blk: add support for VIRTIO_BLK_T_FLUSH
vdpa_sim_blk: make vdpasim_blk_check_range usable by other requests
vdpa_sim_blk: check if sector is 0 for commands other than read or write
vdpa_sim: Implement suspend vdpa op
vhost-vdpa: uAPI to suspend the device
vhost-vdpa: introduce SUSPEND backend feature bit
vdpa: Add suspend operation
virtio-blk: Avoid use-after-free on suspend/resume
virtio_vdpa: support the arg sizes of find_vqs()
vhost-vdpa: Call ida_simple_remove() when failed
vDPA: fix 'cast to restricted le16' warnings in vdpa.c
vDPA: !FEATURES_OK should not block querying device config space
vDPA/ifcvf: support userspace to query features and MQ of a management device
vDPA/ifcvf: get_config_size should return a value no greater than dev implementation
vhost scsi: Allow user to control num virtqueues
vhost-scsi: Fix max number of virtqueues
vdpa/mlx5: Support different address spaces for control and data
vdpa/mlx5: Implement susupend virtqueue callback
...
1, Optimise getcpu() with vDSO;
2, PCI enablement on top of pci & irqchip changes;
3, Stack unwinder and stack trace support;
4, Some bug fixes and build error fixes;
5, Update the default config file.
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Merge tag 'loongarch-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen:
- Optimise getcpu() with vDSO
- PCI enablement on top of pci & irqchip changes
- Stack unwinder and stack trace support
- Some bug fixes and build error fixes
- Update the default config file
* tag 'loongarch-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
docs/zh_CN/LoongArch: Add I14 description
docs/LoongArch: Add I14 description
LoongArch: Update Loongson-3 default config file
LoongArch: Add USER_STACKTRACE support
LoongArch: Add STACKTRACE support
LoongArch: Add prologue unwinder support
LoongArch: Add guess unwinder support
LoongArch: Add vDSO syscall __vdso_getcpu()
LoongArch: Add PCI controller support
LoongArch: Parse MADT to get multi-processor information
LoongArch: Jump to the link address before enable PG
LoongArch: Requires __force attributes for any casts
LoongArch: Fix unsigned comparison with less than zero
LoongArch: Adjust arch/loongarch/Kconfig
LoongArch: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK
- Rename vfio source file to more easily allow additional source
files in the upcoming development cycles (Jason Gunthorpe)
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Merge tag 'vfio-v6.0-rc1pt2' of https://github.com/awilliam/linux-vfio
Pull another VFIO update from Alex Williamson:
- Rename vfio source file to more easily allow additional source
files in the upcoming development cycles (Jason Gunthorpe)
* tag 'vfio-v6.0-rc1pt2' of https://github.com/awilliam/linux-vfio:
vfio: Move vfio.c to vfio_main.c
Commit 36d4b36b69 ("lib/nodemask: inline next_node_in() and
node_random()") removed the lib/nodemask.c file, but the remove didn't
happen when the patch was applied.
Reported-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix device tree schema validation messages like 'gpio-line-names'
does not match any of the regexes: 'pinctrl-[0-9]+' From schema: ...
sifive,gpio.yaml'.
The bindings were missing the gpio-line-names element, which was
causing the dt-schema checker to trip-up.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Atul Khare <atulkhare@rivosinc.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20220803155539.800766-1-mail@conchuod.ie
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
When the CONFIG_PORTABLE/CONFIG_NONPORTABLE switches were added, various
configs were updated, but the wireguard config was forgotten about. This
leads to unbootable test kernels, causing CI fails. Add
CONFIG_NONPORTABLE=y to the wireguard test suite configuration for
riscv32.
Fixes: 44c1e84a38 ("RISC-V: Add CONFIG_{NON,}PORTABLE")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220809145757.83673-1-Jason@zx2c4.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Sstc extension allows the guest to program the vstimecmp CSR directly
instead of making an SBI call to the hypervisor to program the next
event. The timer interrupt is also directly injected to the guest by
the hardware in this case. To maintain backward compatibility, the
hypervisors also update the vstimecmp in an SBI set_time call if
the hardware supports it. Thus, the older kernels in guest also
take advantage of the sstc extension.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Acked-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/all/CAAhSdy2mb6wyqy0NAn9BcTWKMYEc0Z4zU3s3j7oNqBz6eDQ9sg@mail.gmail.com/
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
I14 is also a kind of immediate operand in instruction, like I8/I12/I16/
I21/I26, add it in the Chinese documentation.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
I14 is also a kind of immediate operand in instruction, like I8/I12/I16/
I21/I26, add it in the English documentation.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
1, Add NVME related options;
2, Add compressed firmware support;
3, Add virtio drivers in order to run in qemu.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
To get the best stacktrace output, you can compile your userspace
programs with frame pointers (at least glibc + the app you are tracing).
1, export "CC = gcc -fno-omit-frame-pointer";
2, compile your programs with "CC";
3, use uprobe to get stacktrace output.
...
echo 'p:malloc /usr/lib64/libc.so.6:0x0a4704 size=%r4:u64' > uprobe_events
echo 'p:free /usr/lib64/libc.so.6:0x0a4d50 ptr=%r4:x64' >> uprobe_events
echo 'comm == "demo"' > ./events/uprobes/malloc/filter
echo 'comm == "demo"' > ./events/uprobes/free/filter
echo 1 > ./options/userstacktrace
echo 1 > ./options/sym-userobj
...
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
1. Use common arch_stack_walk() infrastructure to avoid duplicated code
and avoid taking care of the stack storage and filtering.
2. Add sched_ra (means sched return address) and sched_cfa (means sched
call frame address) to thread_info, and store them in switch_to().
3. Add __get_wchan() implementation.
Now we can print the process stack and wait channel by cat /proc/*/stack
and /proc/*/wchan.
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
It unwind the stack frame based on prologue code analyze.
CONFIG_KALLSYMS is needed, at least the address and length
of each function.
Three stages when we do unwind,
1) unwind_start(), the prapare of unwinding, fill unwind_state.
2) unwind_done(), judge whether the unwind process is finished or not.
3) unwind_next_frame(), unwind the next frame.
Dividing unwinder helps to add new unwinders in the future, e.g.:
unwinder_frame, unwinder_orc, .etc.
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Name "guess unwinder" comes from x86, it scans the stack and reports
every kernel text address it finds.
Unwinders can be used by dump_stack() and other stacktrace functions.
Three stages when we do unwind,
1) unwind_start(), the prapare of unwinding, fill unwind_state.
2) unwind_done(), judge whether the unwind process is finished or not.
3) unwind_next_frame(), unwind the next frame.
Add get_stack_info() to get stack info. At present we have irq stack and
task stack. The next_sp is the key info between two types of stacks.
Dividing unwinder helps to add new unwinders in the future.
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
We test 20 million times of getcpu(), the real syscall version take 25
seconds, while the vsyscall version take only 2.4 seconds.
Signed-off-by: Rui Wang <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Loongson64 based systems are PC-like systems which use PCI/PCIe as its
I/O bus, This patch adds the PCI host controller support for LoongArch.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Parse MADT to get multi-processor information, in order to fix the boot
problem and cpu-hotplug problem for SMP platform.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The kernel entry points of both boot CPU (i.e., kernel_entry) and non-
boot CPUs (i.e., smpboot_entry) may be physical address from BootLoader
(in DA mode or identity-mapping PG mode). So we should jump to the link
address before PG enabled (because DA is disabled at the same time) and
just after DMW configured.
Specifically: With some older firmwares, non-boot CPUs started with PG
enabled, but this need firmware cooperation in the form of a temporary
page table, which is deemed unnecessary. OTOH, latest firmware versions
configure the non-boot CPUs to start in DA mode, so kernel-side changes
are needed.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The return value from the call to get_timer_irq() is int, which can be
a negative error code. However, the return value is being assigned to an
unsigned int variable 'irq', so making 'irq' an int.
Eliminate the following coccicheck warning:
./arch/loongarch/kernel/time.c:146:5-8: WARNING: Unsigned expression compared with zero: irq < 0
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
1, ACPI, EFI and SMP are mandatories for LoongArch, select them
unconditionally to avoid various build errors for 'make randconfig'.
2, Move the MMU_GATHER_MERGE_VMAS selection to the correct place.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
- A smatch warning fix for DM writecache locking in writecache_map.
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Merge tag 'for-6.0/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- A few fixes for the DM verity and bufio changes in this merge window
- A smatch warning fix for DM writecache locking in writecache_map
* tag 'for-6.0/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm bufio: fix some cases where the code sleeps with spinlock held
dm writecache: fix smatch warning about invalid return from writecache_map
dm verity: fix verity_parse_opt_args parsing
dm verity: fix DM_VERITY_OPTS_MAX value yet again
dm bufio: simplify DM_BUFIO_CLIENT_NO_SLEEP locking
gem:
- Annotate WW context in error paths
shmem-helper:
- Add missing vunmap in error paths
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Merge tag 'drm-next-2022-08-12-1' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Not much to squeeze into rc1, just two small fixes, one for core gem
and one for shmem-helpers:
gem:
- Annotate WW context in error paths
shmem-helper:
- Add missing vunmap in error paths"
* tag 'drm-next-2022-08-12-1' of git://anongit.freedesktop.org/drm/drm:
drm/gem: Properly annotate WW context on drm_gem_lock_reservations() error
drm/shmem-helper: Add missing vunmap on error
Fixed few typos and bit fields not aligned with the spec. Define other
related macros that will be useful in the future.
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220711174632.4186047-6-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Counter info encoding format is defined by the SBI specificaiton.
KVM implementation of SBI PMU extension will also leverage this definition.
Move the definition to common sbi header file from the sbi pmu driver.
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220711174632.4186047-5-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Some of the SBI PMU calls does not pass 64bit arguments
correctly and not under RV32 compile time flags. Currently,
this doesn't create any incorrect results as RV64 ignores
any value in the additional register and qemu doesn't support
raw events.
Fix those SBI calls in order to set correct values for RV32.
Fixes: e999143459 ("RISC-V: Add perf platform driver based on SBI PMU extension")
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-4-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Currently, riscv_pmu_event_set_period updates the userpage mapping.
However, the caller of riscv_pmu_event_set_period should update
the userpage mapping because the counter can not be updated/started
from set_period function in counter overflow path.
Invoke the perf_event_update_userpage at the caller so that it
doesn't get invoked twice during counter start path.
Fixes: f5bfa23f57 ("RISC-V: Add a perf core library for pmu drivers")
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-3-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This series implements Sstc extension support which was ratified
recently. Before the Sstc extension, an SBI call is necessary to
generate timer interrupts as only M-mode have access to the timecompare
registers. Thus, there is significant latency to generate timer
interrupts at kernel. For virtualized enviornments, its even worse as
the KVM handles the SBI call and uses a software timer to emulate the
timecomapre register.
Sstc extension solves both these problems by defining a
stimecmp/vstimecmp at supervisor (host/guest) level. It allows kernel to
program a timer and recieve interrupt without supervisor execution
enviornment (M-mode/HS mode) intervention.
* palmer/riscv-sstc:
RISC-V: Prefer sstc extension if available
RISC-V: Enable sstc extension parsing from DT
RISC-V: Add SSTC extension CSR details
RISC-V ISA has sstc extension which allows updating the next clock event
via a CSR (stimecmp) instead of an SBI call. This should happen dynamically
if sstc extension is available. Otherwise, it will fallback to SBI call
to maintain backward compatibility.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/20220722165047.519994-4-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
The ISA extension framework now allows parsing any multi-letter
ISA extension.
Enable that for sstc extension.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220722165047.519994-3-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This patch just introduces the required CSR fields related to the
SSTC extension.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220722165047.519994-2-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
In riscv the process of uprobe going to clear spie before exec
the origin insn,and set spie after that.But When access the page
which origin insn has been placed a page fault may happen and
irq was disabled in arch_uprobe_pre_xol function,It cause a WARN
as follows.
There is no need to clear/set spie in arch_uprobe_pre/post/abort_xol.
We can just remove it.
[ 31.684157] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1488
[ 31.684677] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 76, name: work
[ 31.684929] preempt_count: 0, expected: 0
[ 31.685969] CPU: 2 PID: 76 Comm: work Tainted: G
[ 31.686542] Hardware name: riscv-virtio,qemu (DT)
[ 31.686797] Call Trace:
[ 31.687053] [<ffffffff80006442>] dump_backtrace+0x30/0x38
[ 31.687699] [<ffffffff80812118>] show_stack+0x40/0x4c
[ 31.688141] [<ffffffff8081817a>] dump_stack_lvl+0x44/0x5c
[ 31.688396] [<ffffffff808181aa>] dump_stack+0x18/0x20
[ 31.688653] [<ffffffff8003e454>] __might_resched+0x114/0x122
[ 31.688948] [<ffffffff8003e4b2>] __might_sleep+0x50/0x7a
[ 31.689435] [<ffffffff80822676>] down_read+0x30/0x130
[ 31.689728] [<ffffffff8000b650>] do_page_fault+0x166/x446
[ 31.689997] [<ffffffff80003c0c>] ret_from_exception+0x0/0xc
Fixes: 74784081aa ("riscv: Add uprobes supported")
Signed-off-by: Yipeng Zou <zouyipeng@huawei.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220721065820.245755-1-zouyipeng@huawei.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
