Haris Okanovic 77218e83c8 tpm_tis: fix stall after iowrite*()s ... ioread8() operations to TPM MMIO addresses can stall the CPU when immediately following a sequence of iowrite*()'s to the same region. For example, cyclitest measures ~400us latency spikes when a non-RT usermode application communicates with an SPI-based TPM chip (Intel Atom E3940 system, PREEMPT_RT kernel). The spikes are caused by a stalling ioread8() operation following a sequence of 30+ iowrite8()s to the same address. I believe this happens because the write sequence is buffered (in CPU or somewhere along the bus), and gets flushed on the first LOAD instruction (ioread*()) that follows. The enclosed change appears to fix this issue: read the TPM chip's access register (status code) after every iowrite*() operation to amortize the cost of flushing data to chip across multiple instructions. Signed-off-by: Haris Okanovic <haris.okanovic@ni.com> Link: https://lore.kernel.org/r/20230323153436.B2SATnZV@linutronix.de Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by: Jarkko Sakkinen <jarkko@kernel.org> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>		2023-04-24 16:15:53 +03:00
..
accel	accel/ivpu: Fix S3 system suspend when not idle	2023-04-05 09:07:26 +02:00
accessibility
acpi	Revert "ACPICA: Events: Support fixed PCIe wake event"	2023-04-21 13:39:10 -07:00
amba
android	Char/Misc and other driver subsystem changes for 6.3-rc1	2023-02-24 12:47:33 -08:00
ata	ata: pata_parport: fix memory leaks	2023-03-16 16:54:38 +09:00
atm	atm: idt77252: fix kmemleak when rmmod idt77252	2023-03-21 20:19:28 -07:00
auxdisplay
base	cacheinfo: Fix LLC is not exported through sysfs	2023-03-29 12:04:10 +02:00
bcma
block	virtio: last minute fixes	2023-04-10 13:35:54 -07:00
bluetooth	bluetooth: btbcm: Fix logic error in forming the board name.	2023-04-10 10:23:15 -07:00
bus	Devicetree fixes for v6.2, part 3:	2023-04-13 15:21:56 -07:00
cdrom
char	tpm_tis: fix stall after iowrite*()s	2023-04-24 16:15:53 +03:00
clk	clk: rs9: Fix suspend/resume	2023-03-21 10:47:06 -07:00
clocksource	Updates for timekeeping, timers and clockevent/source drivers:	2023-02-21 09:45:13 -08:00
comedi
connector
counter	counter: 104-quad-8: Fix Synapse action reported for Index signals	2023-03-18 09:26:40 -04:00
cpufreq	amd-pstate: Fix amd_pstate mode switch	2023-04-11 20:44:25 +02:00
cpuidle	cpuidle: psci: Iterate backwards over list in psci_pd_remove()	2023-03-07 14:04:13 +01:00
crypto	This push fixes a regression in the caam driver.	2023-03-05 11:32:30 -08:00
cxl	Merge branch 'for-6.3/cxl-doe-fixes' into for-6.3/cxl	2023-04-04 15:37:25 -07:00
dax	cxl for v6.3	2023-02-25 09:19:23 -08:00
dca
devfreq
dio
dma	dmaengine: apple-admac: Fix 'current_tx' not getting freed	2023-03-31 18:17:21 +05:30
dma-buf	dma-buf: make kobj_type structure constant	2023-02-17 09:16:34 +01:00
edac	- Add a driver for the RAS functionality on Xilinx's on chip memory	2023-02-21 08:10:03 -08:00
eisa
extcon	extcon: intel-cht-wc: Add support for Lenovo Yoga Tab 3 Pro YT3-X90F	2023-02-04 13:05:42 +00:00
firewire	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
firmware	firmware/psci: demote suspend-mode warning to info level	2023-04-14 13:48:56 +02:00
fpga	fpga: bridge: properly initialize bridge device before populating children	2023-04-07 00:10:04 +08:00
fsi
gnss
gpio	gpio: 104-idi-48: Enable use_raw_spinlock for idi48_regmap_config	2023-04-11 21:08:31 +02:00
gpu	Merge tag 'amd-drm-fixes-6.3-2023-04-19' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes	2023-04-21 11:13:25 +10:00
greybus
hid	for-linus-2023041201	2023-04-12 17:26:00 -07:00
hsi	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
hte
hv	Drivers: vmbus: Check for channel allocation before looking up relids	2023-03-06 15:28:03 +00:00
hwmon	hwmon (it87): Fix voltage scaling for chips with 10.9mV ADCs	2023-03-21 19:14:55 -07:00
hwspinlock
hwtracing	coresight: etm4x: Do not access TRCIDR1 for identification	2023-03-21 12:31:02 +00:00
i2c	just two driver fixes	2023-04-15 11:06:49 -07:00
i3c	I3C for 6.3	2023-02-28 16:05:01 -08:00
idle	Power management updates for 6.3-rc1	2023-02-21 12:13:58 -08:00
iio	iio: light: tsl2772: fix reading proximity-diodes from device tree	2023-04-08 10:44:34 +01:00
infiniband	RDMA/core: Fix GID entry ref leak when create_ah fails	2023-04-13 12:17:32 -03:00
input	Input updates for v6.3-rc7	2023-04-23 07:46:52 -07:00
interconnect	interconnect: exynos: drop redundant link destroy	2023-03-13 21:13:48 +02:00
iommu	iommufd: Do not corrupt the pfn list when doing batch carry	2023-04-04 09:10:55 -03:00
ipack	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
irqchip	ARM:	2023-02-25 11:30:21 -08:00
isdn
leds	- Remove Drivers	2023-02-23 15:09:31 -08:00
macintosh	powerpc updates for 6.3	2023-02-25 11:00:06 -08:00
mailbox	mailbox: qcom-apcs-ipc: add IPQ5332 APSS clock support	2023-02-23 14:47:13 -06:00
mcb
md	block-6.3-2023-03-30	2023-03-31 12:35:03 -07:00
media	Revert "venus: firmware: Correct non-pix start and end addresses"	2023-04-02 10:47:03 -07:00
memory	memory: tegra30-emc: fix interconnect registration race	2023-03-13 21:13:49 +02:00
memstick	memstick: fix memory leak if card device is never registered	2023-04-05 11:43:51 +02:00
message
mfd	Including fixes from wireless and netfilter.	2023-02-27 14:05:08 -08:00
misc	misc: ad525x_dpot-i2c: Convert to i2c's .probe_new()	2023-03-09 21:58:45 +01:00
mmc	mmc: sdhci_am654: Set HIGH_SPEED_ENA for SDR12 and SDR25	2023-03-23 12:02:00 +01:00
most
mtd	This pull request contains the following bug fixes for UBI and UBIFS:	2023-04-15 16:55:09 -07:00
mux
net	wifi: ath9k: Don't mark channelmap stack variable read-only in ath9k_mci_update_wlan_channels()	2023-04-20 15:26:37 -07:00
nfc	nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition	2023-03-15 00:28:23 -07:00
ntb
nubus
nvdimm	virtio,vhost,vdpa: features, fixes	2023-02-25 11:48:02 -08:00
nvme	nvme-pci: add NVME_QUIRK_BOGUS_NID for T-FORCE Z330 SSD	2023-04-14 07:13:48 +02:00
nvmem	nvmem: core: return -ENOENT if nvmem cell is not found	2023-03-10 10:55:49 +01:00
of	Devicetree fixes for v6.2, part 3:	2023-04-13 15:21:56 -07:00
opp	OPP: fix error checking in opp_migrate_dentry()	2023-02-16 13:48:53 +01:00
parisc
parport	Char/Misc and other driver subsystem changes for 6.3-rc1	2023-02-24 12:47:33 -08:00
pci	- Remove an over-zealous sanity check of the array of MSI-X vectors to	2023-04-23 08:15:33 -07:00
pcmcia	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
peci
perf	perf/amlogic: adjust register offsets	2023-03-27 17:31:22 +02:00
phy	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
pinctrl	Revert "pinctrl: amd: Disable and mask interrupts on resume"	2023-04-11 22:45:42 +02:00
platform	platform-drivers-x86 for v6.3-5	2023-04-06 10:13:23 -07:00
pnp
power	power: supply: da9150: Fix use after free bug in da9150_charger_remove due to race condition	2023-03-12 23:28:04 +01:00
powercap	More power management updates for 6.3-rc1	2023-03-03 10:30:58 -08:00
pps
ps3
ptp	ptp_qoriq: fix memory leak in probe()	2023-03-24 19:17:22 -07:00
pwm	pwm: Zero-initialize the pwm_state passed to driver's .get_state()	2023-03-23 14:44:43 +01:00
rapidio
ras
regulator	regulator: sm5703: Fix missing n_voltages for fixed regulators	2023-04-11 12:41:59 +01:00
remoteproc	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
reset
rpmsg	rpmsg updates for v6.3	2023-02-26 12:10:28 -08:00
rtc	RTC for 6.3	2023-03-03 09:15:50 -08:00
s390	s390/vfio-ap: fix memory leak in vfio_ap device driver	2023-03-27 17:23:08 +02:00
sbus	mm: replace vma->vm_flags direct modifications with modifier calls	2023-02-09 16:51:39 -08:00
scsi	SCSI fixes on 20230415	2023-04-15 10:49:47 -07:00
sh	sh updates for v6.3	2023-03-01 09:44:22 -08:00
siox
slimbus
soc	soc: qcom: rmtfs: handle optional qcom,vmid correctly	2023-03-06 20:13:06 -08:00
soundwire	soundwire updates for 6.3	2023-02-24 17:29:52 -08:00
spi	spi: One small fix for v6.3	2023-04-19 13:49:31 -07:00
spmi
ssb
staging	staging: r8188eu: delete driver	2023-03-09 10:06:28 +01:00
target	scsi: target: iscsi: Fix an error message in iscsi_check_key()	2023-03-06 16:50:42 -05:00
tc
tee	Add explicit cast to (void *) for virt_to_page() argument	2023-04-03 17:54:01 +02:00
thermal	thermal: intel: Avoid updating unsupported THERM_STATUS_CLEAR mask bits	2023-04-11 18:12:19 +02:00
thunderbolt	thunderbolt: Rename shadowed variables bit to interrupt_bit and auto_clear_bit	2023-03-20 19:00:58 +02:00
tty	TTY/Serial driver fixes for 6.3-rc6	2023-04-08 12:17:46 -07:00
ufs	scsi: Revert "scsi: ufs: core: Initialize devfreq synchronously"	2023-04-02 21:12:34 -04:00
uio	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
usb	usb: cdnsp: Fixes error: uninitialized symbol 'len'	2023-04-05 19:55:04 +02:00
vdpa	vdpa_sim_net: complete the initialization before register the device	2023-04-04 14:22:12 -04:00
vfio	vfio/mlx5: Fix the report of dirty_bytes upon pre-copy	2023-03-13 12:50:59 -06:00
vhost	vhost-scsi: Fix crash during LUN unmapping	2023-04-04 11:01:58 -04:00
video	Short summary of fixes pull:	2023-04-13 20:47:58 +02:00
virt	virt/coco/sev-guest: Add throttling awareness	2023-03-13 13:29:27 +01:00
virtio	virtio,vhost,vdpa: features, fixes	2023-02-25 11:48:02 -08:00
vlynq
w1	w1: ds2482: Convert to i2c's .probe_new()	2023-03-09 21:58:57 +01:00
watchdog	linux-watchdog 6.3-rc1 tag	2023-03-02 11:12:01 -08:00
xen	xen: branch for v6.3-rc3	2023-03-17 10:45:49 -07:00
zorro
Kconfig
Makefile	Kbuild updates for v6.3	2023-02-26 11:53:25 -08:00