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6c93c6f3ba
linux/drivers/misc
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Sebastian Ene 6c93c6f3ba misc: Add a mechanism to detect stalls on guest vCPUs 
This driver creates per-cpu hrtimers which are required to do the
periodic 'pet' operation. On a conventional watchdog-core driver, the
userspace is responsible for delivering the 'pet' events by writing to
the particular /dev/watchdogN node. In this case we require a strong
thread affinity to be able to account for lost time on a per vCPU.

This part of the driver is the 'frontend' which is reponsible for
delivering the periodic 'pet' events, configuring the virtual peripheral
and listening for cpu hotplug events. The other part of the driver is
an emulated MMIO device which is part of the KVM virtual machine
monitor and this part accounts for lost time by looking at the
/proc/{}/task/{}/stat entries.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Will Deacon <will@kernel.org>
Signed-off-by: Sebastian Ene <sebastianene@google.com>
Link: https://lore.kernel.org/r/20220711081720.2870509-3-sebastianene@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-07-14 16:54:17 +02:00
..
altera-stapl altera-stapl: Use swap() instead of open coding it 2022-05-09 15:39:45 +02:00
bcm-vk misc: bcm-vk: replace usage of found with dedicated list iterator variable 2022-04-24 17:30:27 +02:00
c2port
cardreader Merge 5.19-rc6 into char-misc-next 2022-07-11 08:32:58 +02:00
cb710 cb710: avoid NULL pointer subtraction 2021-10-05 15:50:05 +02:00
cxl cxl: Fix a memory leak in an error handling path 2022-07-14 16:53:52 +02:00
echo
eeprom eeprom: idt_89hpesx: uninitialized data in idt_dbgfs_csr_write() 2022-07-14 16:53:19 +02:00
genwqe Merge 5.15-rc3 into char-misc next 2021-09-27 15:39:40 +02:00
habanalabs habanalabs: move h/w dirty message to debug 2022-07-12 09:09:31 +03:00
ibmasm Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
lis3lv02d spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
lkdtm lkdtm: cfi: use NULL for a null pointer rather than zero 2022-06-27 16:16:07 +02:00
mei mei: me: fix clang -Wformat warning 2022-07-14 16:53:38 +02:00
ocxl cxl/ocxl: Prepare cleanup of powerpc's asm/prom.h 2022-05-11 23:06:39 +10:00
pvpanic misc/pvpanic: Convert regular spinlock into trylock on panic path 2022-04-29 16:54:59 +02:00
sgi-gru misc: sgi-gru: grukservices: drop unexpected word "the" in the comments 2022-06-27 16:15:17 +02:00
sgi-xp sgi-xp: Use the bitmap API to allocate bitmaps 2022-07-08 15:41:39 +02:00
ti-st ti-st: use tty_write_room 2021-05-13 17:03:20 +02:00
uacce uacce: Handle parent device removal or parent driver module rmmod 2022-07-01 10:35:08 +02:00
vmw_vmci VMCI: Add support for ARM64 2022-04-24 17:32:14 +02:00
ad525x_dpot-i2c.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot-spi.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
ad525x_dpot.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot.h misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
apds990x.c
apds9802als.c
atmel-ssc.c misc: atmel-ssc: Fix IRQ check in ssc_probe 2022-06-10 15:29:56 +02:00
bh1770glc.c
cs5535-mfgpt.c
ds1682.c
dummy-irq.c
dw-xdata-pcie.c
enclosure.c misc: enclosure: replace snprintf in show functions with sysfs_emit 2021-10-22 11:25:39 +02:00
fastrpc.c misc: fastrpc: fix list iterator in fastrpc_req_mem_unmap_impl 2022-05-19 18:57:20 +02:00
gehc-achc.c misc: gehc: Add SPI ID table 2021-10-05 15:47:18 +02:00
hi6421v600-irq.c misc: hi6421-spmi-pmic: Use generic_handle_irq_safe(). 2022-03-02 22:28:50 +01:00
hisi_hikey_usb.c misc: hisi_hikey_usb: change the DT schema 2021-09-14 10:57:31 +02:00
hmc6352.c
hpilo.c misc: hpilo: map iLO shared memory by PCI revision id 2021-06-04 15:28:23 +02:00
hpilo.h misc: hpilo: map iLO shared memory by PCI revision id 2021-06-04 15:28:23 +02:00
ibmvmc.c
ibmvmc.h
ics932s401.c ics932s401: fix broken handling of errors when word reading fails 2021-05-13 17:21:54 +02:00
isl29003.c
isl29020.c
Kconfig misc: Add a mechanism to detect stalls on guest vCPUs 2022-07-14 16:54:17 +02:00
kgdbts.c kgdbts: fix return value of __setup handler 2022-03-18 14:17:56 +01:00
lattice-ecp3-config.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
Makefile misc: Add a mechanism to detect stalls on guest vCPUs 2022-07-14 16:54:17 +02:00
open-dice.c misc: open-dice: Add driver to expose DICE data to userspace 2022-02-04 16:45:39 +01:00
pch_phub.c
pci_endpoint_test.c misc: pci_endpoint_test: Terminate statement with semicolon 2022-01-11 10:19:59 -06:00
phantom.c
qcom-coincell.c
sram-exec.c
sram.c misc: sram: Add compatible string for Tegra234 SYSRAM 2021-12-08 15:16:05 +01:00
sram.h misc: sram: Only map reserved areas in Tegra SYSRAM 2021-08-05 14:27:46 +02:00
tifm_7xx1.c tifm: Remove usage of the deprecated "pci-dma-compat.h" API 2021-09-21 17:33:31 +02:00
tifm_core.c tifm: Remove usage of the deprecated "pci-dma-compat.h" API 2021-09-21 17:33:31 +02:00
tsl2550.c
vcpu_stall_detector.c misc: Add a mechanism to detect stalls on guest vCPUs 2022-07-14 16:54:17 +02:00
vmw_balloon.c vmw_balloon: Print errors on reset only once 2022-04-24 17:24:06 +02:00
xilinx_sdfec.c misc: xilinx-sdfec: Drop unnecessary NULL check after container_of 2021-05-21 22:14:48 +02:00