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934edcd436
linux/drivers
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Dave Jiang 934edcd436 cxl: Add post-reset warning if reset results in loss of previously committed HDM decoders 
Secondary Bus Reset (SBR) is equivalent to a device being hot removed and
inserted again. Doing a SBR on a CXL type 3 device is problematic if the
exported device memory is part of system memory that cannot be offlined.
The event is equivalent to violently ripping out that range of memory from
the kernel. While the hardware requires the "Unmask SBR" bit set in the
Port Control Extensions register and the kernel currently does not unmask
it, user can unmask this bit via setpci or similar tool.

The driver does not have a way to detect whether a reset coming from the
PCI subsystem is a Function Level Reset (FLR) or SBR. The only way to
detect is to note if a decoder is marked as enabled in software but the
decoder control register indicates it's not committed.

Add a helper function to find discrepancy between the decoder software
state versus the hardware register state.

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20240502165851.1948523-6-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
2024-05-08 13:25:46 -05:00
..
accel drm for 6.9: 2024-03-13 18:34:05 -07:00
accessibility Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
acpi RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
amba
android Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
ata ahci: asm1064: asm1166: don't limit reported ports 2024-03-19 12:06:54 +01:00
atm atm: fore200e: Convert to platform remove callback returning void 2024-03-07 20:36:32 -08:00
auxdisplay auxdisplay: img-ascii-lcd: Convert to platform remove callback returning void 2024-03-12 17:37:54 +02:00
base Driver core changes for 6.9-rc1 2024-03-21 13:34:15 -07:00
bcma
block block-6.9-20240322 2024-03-22 12:46:07 -07:00
bluetooth TTY/Serial driver update for 6.9-rc1 2024-03-21 12:44:10 -07:00
bus Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
cache
cdrom cdrom: gdrom: Convert to platform remove callback returning void 2024-03-07 11:53:30 -07:00
cdx cdx: add MSI support for CDX bus 2024-03-07 21:52:03 +00:00
char Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
clk ARM: late SoC changes for 6.9 2024-03-19 11:57:26 -07:00
clocksource A set of updates for clocksource and clockevent drivers: 2024-03-23 14:42:45 -07:00
comedi Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
connector
counter
cpufreq RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
cpuidle RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
crypto This update includes the following changes: 2024-03-15 14:46:54 -07:00
cxl cxl: Add post-reset warning if reset results in loss of previously committed HDM decoders 2024-05-08 13:25:46 -05:00
dax libnvdimm updates for v6.9 2024-03-15 11:58:32 -07:00
dca
devfreq
dio dio: make dio_bus_type const 2024-03-07 20:37:04 +00:00
dma dmaengine updates for v6.9 2024-03-15 12:25:13 -07:00
dma-buf
dpll Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-03-11 20:38:36 -07:00
edac - Add a FRU (Field Replaceable Unit) memory poison manager which 2024-03-11 18:14:06 -07:00
eisa
extcon
firewire firewire: core: add memo about the caller of show functions for device attributes 2024-03-21 21:20:18 +09:00
firmware EFI fixes for v6.9 #2 2024-03-24 13:54:06 -07:00
fpga Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
fsi
gnss
gpio Pin control changes for the v6.9 kernel cycle: 2024-03-14 10:22:26 -07:00
gpu drm fixes for 6.9-rc1 2024-03-21 19:04:31 -07:00
greybus Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
hid hid-for-linus-2024031301 2024-03-14 09:56:15 -07:00
hsi
hte
hv hyperv-next for v6.9 2024-03-21 10:01:02 -07:00
hwmon - Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min 2024-03-14 18:03:09 -07:00
hwspinlock
hwtracing
i2c i2c: muxes: pca954x: Allow sharing reset GPIO 2024-03-20 09:45:04 +01:00
i3c
idle
iio Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
infiniband RDMA v6.9 2024-03-18 15:34:03 -07:00
input TTY/Serial driver update for 6.9-rc1 2024-03-21 12:44:10 -07:00
interconnect interconnect changes for 6.9 2024-03-06 14:03:31 +00:00
iommu dma-mapping fixes for Linux 6.9 2024-03-24 10:45:31 -07:00
ipack ipack: make ipack_bus_type const 2024-03-07 20:32:47 +00:00
irqchip irqchip/renesas-rzg2l: Do not set TIEN and TINT source at the same time 2024-03-18 21:09:02 +01:00
isdn isdn: capi: make capi_class constant 2024-03-07 20:26:24 -08:00
leds - Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min 2024-03-14 18:03:09 -07:00
macintosh powerpc updates for 6.9 2024-03-15 17:53:48 -07:00
mailbox imx: add support for i.MX95 ELE/V2X MU 2024-03-13 12:23:36 -07:00
mcb mcb: constify the struct device_type usage 2024-03-07 20:38:15 +00:00
md - Fix a memory leak in DM integrity recheck code that was added during 2024-03-22 12:34:26 -07:00
media Linux 6.8 2024-03-18 17:30:46 +00:00
memory Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
memstick MMC core: 2024-03-13 10:59:28 -07:00
message
mfd TTY/Serial driver update for 6.9-rc1 2024-03-21 12:44:10 -07:00
misc hardening fixes for v6.9-rc1 2024-03-23 08:43:21 -07:00
mmc Linux 6.8 2024-03-18 17:30:46 +00:00
most most: core: make mostbus const 2024-03-07 20:32:38 +00:00
mtd This pull request contains updates for UBI and UBIFS: 2024-03-21 15:09:29 -07:00
mux
net hardening fixes for v6.9-rc1 2024-03-23 08:43:21 -07:00
nfc
ntb
nubus
nvdimm libnvdimm updates for v6.9 2024-03-15 11:58:32 -07:00
nvme nvme updates for Linux 6.9 2024-03-21 13:23:07 -06:00
nvmem nvmem: core: Print error on wrong bits DT property 2024-03-07 20:21:53 +00:00
of Driver core changes for 6.9-rc1 2024-03-21 13:34:15 -07:00
opp OPP: Extend dev_pm_opp_data with turbo support 2024-03-11 10:39:24 +05:30
parisc parisc: led: Convert to platform remove callback returning void 2024-03-08 10:00:07 +01:00
parport parport: sunbpp: Convert to platform remove callback returning void 2024-03-07 21:50:06 +00:00
pci PCI/CXL: Add 'cxl_bus' reset method for devices below CXL Ports 2024-05-08 13:25:43 -05:00
pcmcia pcmcia: cs: make pcmcia_socket_class constant 2024-03-10 09:07:00 +01:00
peci
perf PCI/CXL: Move CXL Vendor ID to pci_ids.h 2024-05-08 13:18:33 -05:00
phy USB/Thunderbolt changes for 6.9-rc1 2024-03-21 12:35:20 -07:00
pinctrl phy-for-6.9 2024-03-16 11:24:51 -07:00
platform Char/Misc and other driver subsystem updates for 6.9-rc1 2024-03-21 13:21:31 -07:00
pmdomain Core: 2024-03-13 11:33:10 -07:00
pnp
power power supply and reset changes for the 6.9 series 2024-03-14 10:19:48 -07:00
powercap powercap: intel_rapl: Convert to platform remove callback returning void 2024-03-13 20:45:54 +01:00
pps pps: use cflags-y instead of EXTRA_CFLAGS 2024-03-07 21:51:39 +00:00
ps3
ptp Networking changes for 6.9. 2024-03-12 17:44:08 -07:00
pwm
rapidio
ras - Add a FRU (Field Replaceable Unit) memory poison manager which 2024-03-11 18:14:06 -07:00
regulator regulator: Fix for v6.9 2024-03-22 09:52:37 -07:00
remoteproc remoteproc updates for v6.9 2024-03-21 10:37:39 -07:00
reset
rpmsg
rtc RTC for 6.9 2024-03-21 17:16:46 -07:00
s390 more s390 updates for 6.9 merge window 2024-03-19 11:38:27 -07:00
sbus This includes the following changes related to sparc for v6.9: 2024-03-15 12:47:21 -07:00
scsi SCSI misc on 20240322 2024-03-22 13:31:07 -07:00
sh
siox SIOX changes for 6.9-rc1 2024-03-21 15:18:18 -07:00
slimbus slimbus: core: make slimbus_bus const 2024-03-07 20:21:39 +00:00
soc Including fixes from CAN, netfilter, wireguard and IPsec. 2024-03-21 14:50:39 -07:00
soundwire soundwire updates for 6.9 2024-03-15 12:22:52 -07:00
spi spi: Fixes for v6.9 2024-03-22 09:57:00 -07:00
spmi
ssb
staging Staging driver cleanups for 6.9-rc1 2024-03-21 13:03:44 -07:00
target SCSI misc on 20240316 2024-03-16 16:31:12 -07:00
tc
tee ARM: SoC drivers for 6.9 2024-03-12 10:35:24 -07:00
thermal - Fix memory leak in the error path at probe time in the Mediatek LVTS 2024-03-13 20:35:48 +01:00
thunderbolt USB/Thunderbolt changes for 6.9-rc1 2024-03-21 12:35:20 -07:00
tty TTY/Serial driver update for 6.9-rc1 2024-03-21 12:44:10 -07:00
ufs SCSI misc on 20240316 2024-03-16 16:31:12 -07:00
uio uio_dmem_genirq: UIO_MEM_DMA_COHERENT conversion 2024-03-07 21:52:59 +00:00
usb USB/Thunderbolt changes for 6.9-rc1 2024-03-21 12:35:20 -07:00
vdpa vDPA: report virtio-blk flush info to user space 2024-03-19 02:45:51 -04:00
vfio VFIO updates for v6.9-rc1 2024-03-15 13:21:13 -07:00
vhost virtio: features, fixes 2024-03-19 08:57:39 -07:00
video fbdev fixes and cleanups for 6.9-rc1: 2024-03-22 10:09:08 -07:00
virt virt: efi_secret: Convert to platform remove callback returning void 2024-03-09 11:37:18 +01:00
virtio virtio: packed: fix unmap leak for indirect desc table 2024-03-19 03:19:22 -04:00
w1
watchdog linux-watchdog 6.9-rc1 tag 2024-03-17 12:06:10 -07:00
xen xen: branch for v6.9-rc1 2024-03-19 08:48:09 -07:00
zorro
Kconfig
Makefile Revert "leds: Only descend into leds directory when CONFIG_NEW_LEDS is set" 2024-03-07 08:48:10 +00:00