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Frederic Barrat 03b8abedf4 cxl: Enable global TLBIs for cxl contexts 
The PSL and nMMU need to see all TLB invalidations for the memory
contexts used on the adapter. For the hash memory model, it is done by
making all TLBIs global as soon as the cxl driver is in use. For
radix, we need something similar, but we can refine and only convert
to global the invalidations for contexts actually used by the device.

The new mm_context_add_copro() API increments the 'active_cpus' count
for the contexts attached to the cxl adapter. As soon as there's more
than 1 active cpu, the TLBIs for the context become global. Active cpu
count must be decremented when detaching to restore locality if
possible and to avoid overflowing the counter.

The hash memory model support is somewhat limited, as we can't
decrement the active cpus count when mm_context_remove_copro() is
called, because we can't flush the TLB for a mm on hash. So TLBIs
remain global on hash.

Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Fixes: f24be42aab ("cxl: Add psl9 specific code")
Tested-by: Alistair Popple <alistair@popple.id.au>
[mpe: Fold in updated comment on the barrier from Fred]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 		2017-09-28 17:09:16 +10:00
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accessibility
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acpi Merge branches 'acpi-pmic', 'acpi-bus', 'acpi-wdat' and 'acpi-properties' 2017-09-22 23:38:45 +02:00
amba
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android ANDROID: binder: don't queue async transactions to thread. 2017-09-01 09:22:50 +02:00
ata Merge branch 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2017-09-06 22:41:21 -07:00
atm
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auxdisplay
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base Power management fixes for v4.14-rc2 2017-09-22 17:28:59 -10:00
bcma
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block The highlights include: 2017-09-12 20:03:53 -07:00
bluetooth
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bus ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
cdrom
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char Merge branch 'next-tpm' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2017-09-24 11:34:28 -07:00
clk The diff is dominated by the Allwinner A10/A20 SoCs getting converted to 2017-09-13 11:04:14 -07:00
clocksource clocksource/integrator: Fix section mismatch warning 2017-09-18 09:37:33 +02:00
connector
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cpufreq cpufreq: ti-cpufreq: Support additional am43xx platforms 2017-09-20 00:51:01 +02:00
cpuidle ARM: cpuidle: Avoid memleak if init fail 2017-09-19 23:10:51 +02:00
crypto crypto: caam - fix LS1021A support on ARMv7 multiplatform kernel 2017-09-20 17:42:42 +08:00
dax - Some request-based DM core and DM multipath fixes and cleanups 2017-09-14 13:43:16 -07:00
dca
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devfreq
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dio
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dma dmaengine updates for 4.14-rc1 2017-09-07 14:03:05 -07:00
dma-buf
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edac
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eisa
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extcon
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firewire
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firmware dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
fmc
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fpga
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fsi
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gpio - New Drivers 2017-09-07 13:51:13 -07:00
gpu Merge tag 'exynos-drm-fixes-for-v4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes 2017-09-21 08:02:39 +10:00
hid media updates for v4.14-rc1 2017-09-07 12:53:14 -07:00
hsi
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hv Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-07 09:25:15 -07:00
hwmon dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
hwspinlock
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hwtracing
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i2c i2c: i2c-stm32f7: add driver 2017-09-14 17:34:43 +02:00
ide Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
idle Power management updates for v4.14-rc1 2017-09-05 12:19:08 -07:00
iio - New Drivers 2017-09-07 13:51:13 -07:00
infiniband First -rc update for 4.14 kernel 2017-09-23 05:47:04 -10:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-09-22 17:23:41 -10:00
iommu iommu/of: Remove PCI host bridge node check 2017-09-22 12:05:43 +02:00
ipack
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irqchip irqchip.mips-gic: Fix shared interrupt mask writes 2017-09-19 19:44:07 +01:00
isdn isdn/i4l: fetch the ppp_write buffer in one shot 2017-09-20 16:01:36 -07:00
leds dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
lightnvm
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macintosh powerpc/macintosh: constify wf_sensor_ops structures 2017-09-01 16:42:54 +10:00
mailbox Just behavorial changes to a controller driver: 2017-09-07 13:23:37 -07:00
mcb Char/Misc drivers for 4.14-rc1 2017-09-05 11:08:17 -07:00
md Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-09-19 08:39:32 -07:00
media Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:13:32 -07:00
memory ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
memstick
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message
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mfd dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
misc cxl: Enable global TLBIs for cxl contexts 2017-09-28 17:09:16 +10:00
mmc mmc: cavium: Fix use-after-free in of_platform_device_destroy 2017-09-08 15:38:22 +02:00
mtd mtd: nand: remove unused blockmask variable 2017-09-18 14:51:02 +02:00
mux
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net net: phy: Fix truncation of large IRQ numbers in phy_attached_print() 2017-09-21 20:35:17 -07:00
nfc
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ntb
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nubus
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nvdimm libnvdimm, namespace: fix btt claim class crash 2017-09-18 17:29:01 -07:00
nvme nvme-pci: implement the HMB entry number and size limitations 2017-09-11 12:29:40 -04:00
nvmem
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of dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
oprofile
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parisc
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parport Char/Misc drivers for 4.14-rc1 2017-09-05 11:08:17 -07:00
pci PCI: endpoint: Use correct "end of test" interrupt 2017-09-20 13:56:06 -05:00
pcmcia
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perf drivers/perf: arm_pmu_acpi: Release memory obtained by kasprintf 2017-09-22 15:11:46 +01:00
phy Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
pinctrl pinctrl/amd: save pin registers over suspend/resume 2017-09-12 15:58:45 +02:00
platform dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
pnp dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
power power supply and reset changes for the v4.14 series 2017-09-09 14:44:39 -07:00
powercap
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pps drivers/pps: use surrounding "if PPS" to remove numerous dependency checks 2017-09-08 18:26:51 -07:00
ps3
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ptp
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pwm pwm: Changes for v4.14-rc1 2017-09-11 13:04:32 -07:00
rapidio
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ras
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regulator - New Drivers 2017-09-07 13:51:13 -07:00
remoteproc rpmsg updates for v4.14 2017-09-09 14:34:38 -07:00
reset Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
rpmsg rpmsg: glink: initialize ret to zero to ensure error status check is correct 2017-09-04 10:52:30 -07:00
rtc RTC for 4.14 2017-09-13 10:56:00 -07:00
s390 s390/cio: recover from bad paths 2017-09-19 08:36:19 +02:00
sbus
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scsi scsi: sg: fixup infoleak when using SG_GET_REQUEST_TABLE 2017-09-15 15:16:49 -04:00
sfi
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sh
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sn
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soc Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
spi ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
spmi
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ssb
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staging Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:54:01 -07:00
target Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:13:32 -07:00
tc
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tee
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thermal Merge branches 'thermal-core', 'thermal-soc', 'thermal-intel' and 'const-thermal-zone-structure' into next 2017-09-08 11:20:04 +08:00
thunderbolt ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
tty dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
uio
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usb Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 18:13:32 -07:00
uwb
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vfio vfio: platform: constify amba_id 2017-08-30 14:03:42 -06:00
vhost lib/interval_tree: fast overlap detection 2017-09-08 18:26:49 -07:00
video fbdev changes for v4.14: 2017-09-14 13:33:33 -07:00
virt
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virtio SCSI misc on 20170907 2017-09-07 21:11:05 -07:00
vlynq
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vme
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w1 power supply and reset changes for the v4.14 series 2017-09-09 14:44:39 -07:00
watchdog Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-09-15 20:43:33 -07:00
xen xen: Fixes for rc2 2017-09-22 06:40:47 -10:00
zorro
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Kconfig
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Makefile
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