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Mohammed Gamal 1f3aed0147 hv: clocksource: Add notrace attribute to read_hv_sched_clock_*() functions 
When selecting function_graph tracer with the command:
 # echo function_graph > /sys/kernel/debug/tracing/current_tracer

The kernel crashes with the following stack trace:

[69703.122389] BUG: stack guard page was hit at 000000001056545c (stack is 00000000fa3f8fed..0000000005d39503)
[69703.122403] kernel stack overflow (double-fault): 0000 [#1] SMP PTI
[69703.122413] CPU: 0 PID: 16982 Comm: bash Kdump: loaded Not tainted 4.18.0-236.el8.x86_64 #1
[69703.122420] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.0 12/17/2019
[69703.122433] RIP: 0010repare_ftrace_return+0xa/0x110
[69703.122458] Code: 05 00 0f 0b 48 c7 c7 10 ca 69 ae 0f b6 f0 e8 4b 52 0c 00 31 c0 eb ca 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 41 55 41 54 <53> 48 83 ec 18 65 48 8b 04 25 28 00 00 00 48 89 45 d8 31 c0 48 85
[69703.122467] RSP: 0018:ffffbd6d01118000 EFLAGS: 00010086
[69703.122476] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
[69703.122484] RDX: 0000000000000000 RSI: ffffbd6d011180d8 RDI: ffffffffadce7550
[69703.122491] RBP: ffffbd6d01118018 R08: 0000000000000000 R09: ffff9d4b09266000
[69703.122498] R10: ffff9d4b0fc04540 R11: ffff9d4b0fc20a00 R12: ffff9d4b6e42aa90
[69703.122506] R13: ffff9d4b0fc20ab8 R14: 00000000000003e8 R15: ffffbd6d0111837c
[69703.122514] FS:  00007fd5f2588740(0000) GS:ffff9d4b6e400000(0000) knlGS:0000000000000000
[69703.122521] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[69703.122528] CR2: ffffbd6d01117ff8 CR3: 00000000565d8001 CR4: 00000000003606f0
[69703.122538] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[69703.122545] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[69703.122552] Call Trace:
[69703.122568]  ftrace_graph_caller+0x6b/0xa0
[69703.122589]  ? read_hv_sched_clock_tsc+0x5/0x20
[69703.122599]  read_hv_sched_clock_tsc+0x5/0x20
[69703.122611]  sched_clock+0x5/0x10
[69703.122621]  sched_clock_local+0x12/0x80
[69703.122631]  sched_clock_cpu+0x8c/0xb0
[69703.122644]  trace_clock_global+0x21/0x90
[69703.122655]  ring_buffer_lock_reserve+0x100/0x3c0
[69703.122671]  trace_buffer_lock_reserve+0x16/0x50
[69703.122683]  __trace_graph_entry+0x28/0x90
[69703.122695]  trace_graph_entry+0xfd/0x1a0
[69703.122705]  ? read_hv_clock_tsc_cs+0x10/0x10
[69703.122714]  ? sched_clock+0x5/0x10
[69703.122723]  prepare_ftrace_return+0x99/0x110
[69703.122734]  ? read_hv_clock_tsc_cs+0x10/0x10
[69703.122743]  ? sched_clock+0x5/0x10
[69703.122752]  ftrace_graph_caller+0x6b/0xa0
[69703.122768]  ? read_hv_clock_tsc_cs+0x10/0x10
[69703.122777]  ? sched_clock+0x5/0x10
[69703.122786]  ? read_hv_sched_clock_tsc+0x5/0x20
[69703.122796]  ? ring_buffer_unlock_commit+0x1d/0xa0
[69703.122805]  read_hv_sched_clock_tsc+0x5/0x20
[69703.122814]  ftrace_graph_caller+0xa0/0xa0
[ ... recursion snipped ... ]

Setting the notrace attribute for read_hv_sched_clock_msr() and
read_hv_sched_clock_tsc() fixes it.

Fixes: bd00cd52d5be ("clocksource/drivers/hyperv: Add Hyper-V specific sched clock function")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Mohammed Gamal <mgamal@redhat.com>
Link: https://lore.kernel.org/r/20200924151117.767442-1-mgamal@redhat.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2020-09-28 09:04:48 +00:00
..
acpi_pm.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243
2019-06-19 17:09:07 +02:00
arc_timer.c
clocksource/drivers/arc_timer: Remove duplicate error message
2020-05-22 23:58:56 +02:00
arm_arch_timer.c
arm64: arch_timer: Disable the compat vdso for cores affected by ARM64_WORKAROUND_1418040
2020-07-08 21:57:51 +01:00
arm_global_timer.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
armv7m_systick.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
asm9260_timer.c
clocksource/drivers/asm9260: Add a check for of_clk_get
2019-11-04 10:40:10 +01:00
bcm2835_timer.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
bcm_kona_timer.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
clksrc_st_lpc.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
clksrc-dbx500-prcmu.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 197
2019-05-30 11:29:22 -07:00
clps711x-timer.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
dummy_timer.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
dw_apb_timer_of.c
clocksource: dw_apb_timer_of: Fix missing clockevent timers
2020-05-23 00:02:59 +02:00
dw_apb_timer.c
clocksource: dw_apb_timer: Make CPU-affiliation being optional
2020-05-23 00:02:41 +02:00
em_sti.c
clocksource/drivers/em_sti: Fix variable declaration in em_sti_probe
2020-01-16 19:06:57 +01:00
exynos_mct.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
h8300_timer8.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
h8300_timer16.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
h8300_tpu.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hyperv_timer.c
hv: clocksource: Add notrace attribute to read_hv_sched_clock_*() functions
2020-09-28 09:04:48 +00:00
i8253.c
clockevents/drivers/i8253: Add support for PIT shutdown quirk
2018-11-04 11:04:46 +01:00
ingenic-ost.c
clocksource: Add driver for the Ingenic JZ47xx OST
2020-02-27 09:37:29 +01:00
ingenic-sysost.c
clocksource/drivers/ingenic: Add support for the Ingenic X1000 OST.
2020-07-23 16:58:09 +02:00
ingenic-timer.c
clocksource/drivers/ingenic: Add high resolution timer support for SMP/SMT.
2020-07-23 16:57:19 +02:00
jcore-pit.c
clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE
2017-06-14 11:58:45 +02:00
Kconfig
- Core Frameworks
2020-08-15 08:09:38 -07:00
Makefile
- Core Frameworks
2020-08-15 08:09:38 -07:00
mips-gic-timer.c
clocksource: mips-gic-timer: Mark GIC timer as unstable if ref clock changes
2020-05-23 00:03:16 +02:00
mmio.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
mps2-timer.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
mxs_timer.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
nomadik-mtu.c
clocksource/drivers/nomadik-mtu: Handle 32kHz clock
2020-07-23 16:57:43 +02:00
numachip.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282
2019-06-05 17:36:37 +02:00
renesas-ostm.c
clocksource/drivers/renesas-ostm: Use unique device name instead of ostm
2019-11-04 10:38:46 +01:00
samsung_pwm_timer.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
scx200_hrt.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
sh_cmt.c
clocksource/drivers/sh_cmt: Use "kHz" for kilohertz
2020-07-23 16:57:43 +02:00
sh_mtu2.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
sh_tmu.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
timer-armada-370-xp.c
clocksource/drivers: Unify the names to timer-* format
2018-10-03 14:37:02 +02:00
timer-atcpit100.c
clocksource/drivers: Set clockevent device cpumask to cpu_possible_mask
2018-07-26 11:26:30 +02:00
timer-atlas7.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-atmel-pit.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
timer-atmel-st.c
clocksource/drivers/atmel-st: Remove useless 'status'
2020-04-15 10:57:15 +02:00
timer-atmel-tcb.c
clocksource/drivers/timer-atmel-tcb: Add sama5d2 support
2020-07-11 18:58:24 +02:00
timer-cadence-ttc.c
clocksource/drivers/cadence-ttc: Use ttc driver as platform driver
2020-01-16 19:06:57 +01:00
timer-cs5535.c
clocksource/drivers/timer-cs5535: Request irq with non-NULL dev_id
2020-03-12 19:23:06 +01:00
timer-davinci.c
clocksource: davinci: axe a pointless __GFP_NOFAIL
2020-04-09 12:13:20 +02:00
timer-digicolor.c
clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE
2017-06-14 11:58:45 +02:00
timer-efm32.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-fsl-ftm.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-fttmr010.c
clocksource/drivers/fttmr010: Set interrupt and shutdown
2020-02-21 09:28:38 +01:00
timer-gx6605s.c
clocksource/drivers/c-sky: Add gx6605s SOC system timer
2018-11-02 19:41:12 +01:00
timer-imx-gpt.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-imx-sysctr.c
clocksource/drivers/imx-sysctr: Remove unused includes
2020-03-17 10:11:45 +01:00
timer-imx-tpm.c
clocksource/drivers/imx-tpm: Add support for ARM64
2020-04-09 16:24:50 +02:00
timer-integrator-ap.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-ixp4xx.c
clocksource/drivers/ixp4xx: Implement delay timer
2019-06-25 19:49:18 +02:00
timer-keystone.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
timer-lpc32xx.c
clocksource/drivers: Unify the names to timer-* format
2018-10-03 14:37:02 +02:00
timer-mediatek.c
clocksource/drivers/mediatek: Fix error handling
2019-10-16 17:04:50 +02:00
timer-meson6.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-microchip-pit64b.c
clocksource/drivers/timer-microchip-pit64b: Fix rate for gck
2020-03-16 11:19:37 +01:00
timer-milbeaut.c
clocksource/drivers/timer-milbeaut: Cleanup common register accesses
2019-05-02 21:55:58 +02:00
timer-mp-csky.c
clocksource/drivers/c-sky: fixup ftrace call-graph panic
2018-12-31 23:17:23 +08:00
timer-npcm7xx.c
clocksource/drivers/npcm: Fix GENMASK and timer operation
2019-08-27 00:31:39 +02:00
timer-nps.c
clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE
2017-06-14 11:58:45 +02:00
timer-of.c
- Some cleanups for the timer-of, use %p0F and the unique device name
2019-11-04 18:49:13 +01:00
timer-of.h
clocksource/drivers/timer-of: Store the device node pointer in 'struct timer_of'
2018-01-08 17:57:24 +01:00
timer-orion.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-owl.c
clocksource/drivers/owl: Improve owl_timer_init fail messages
2020-02-27 09:42:00 +01:00
timer-oxnas-rps.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
timer-pistachio.c
clocksource/drivers: Unify the names to timer-* format
2018-10-03 14:37:02 +02:00
timer-prima2.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-probe.c
Revert "clocksource/drivers/timer-probe: Avoid creating dead devices"
2020-03-28 11:25:44 +01:00
timer-pxa.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-qcom.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282
2019-06-05 17:36:37 +02:00
timer-rda.c
clocksource/drivers/rda: Add clock driver for RDA8810PL SoC
2018-12-18 22:22:23 +01:00
timer-riscv.c
clocksource/drivers/timer-riscv: Use per-CPU timer interrupt
2020-06-09 19:11:22 -07:00
timer-rockchip.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
timer-sp804.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-sp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
timer-sprd.c
clocksource/drivers/sprd: Register one always-on timer to compensate suspend time
2018-07-26 11:26:34 +02:00
timer-stm32-lp.c
clocksource: Add Low Power STM32 timers driver
2020-06-18 11:19:58 +01:00
timer-stm32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
timer-sun4i.c
clocksource: sun4i: Add missing compatibles
2019-08-27 00:31:39 +02:00
timer-sun5i.c
clocksource/drivers/sun5i: Fail gracefully when clock rate is unavailable
2019-02-23 12:13:45 +01:00
timer-tango-xtal.c
clocksource/drivers/tango-xtal: Rename the file for consistency
2019-02-23 12:13:45 +01:00
timer-tegra.c
clocksource/drivers/tegra: Set up maximum-ticks limit properly
2019-06-25 19:49:18 +02:00
timer-ti-32k.c
clocksource/drivers: Replace HTTP links with HTTPS ones
2020-07-23 16:57:43 +02:00
timer-ti-dm-systimer.c
clocksource/drivers/timer-ti-dm: Fix suspend and resume for am3 and am4
2020-07-21 15:48:33 +02:00
timer-ti-dm.c
clocksource/drivers: Replace HTTP links with HTTPS ones
2020-07-23 16:57:43 +02:00
timer-u300.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-versatile.c
clocksource/drivers/timer-versatile: Clear OF_POPULATED flag
2020-05-23 00:03:25 +02:00
timer-vf-pit.c
clocksource/drivers/timer-vf-pit: Add missing parenthesis
2020-04-05 09:24:58 +02:00
timer-vt8500.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00
timer-zevio.c
clocksource: Replace setup_irq() by request_irq()
2020-02-27 12:15:24 +01:00