Niklas Schnelle b02002cc4c s390/pci: Implement ioremap_wc/prot() with MIO ... With our current support for the new MIO PCI instructions, write combining/write back MMIO memory can be obtained via the pci_iomap_wc() and pci_iomap_wc_range() functions. This is achieved by using the write back address for a specific bar as provided in clp_store_query_pci_fn() These functions are however not widely used and instead drivers often rely on ioremap_wc() and ioremap_prot(), which on other platforms enable write combining using a PTE flag set through the pgrprot value. While we do not have a write combining flag in the low order flag bits of the PTE like x86_64 does, with MIO support, there is a write back bit in the physical address (bit 1 on z15) and thus also the PTE. Which bit is used to toggle write back and whether it is available at all, is however not fixed in the architecture. Instead we get this information from the CLP Store Logical Processor Characteristics for PCI command. When the write back bit is not provided we fall back to the existing behavior. Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>		2020-09-14 10:30:07 +02:00
..
ABI	powerpc/perf/hv-24x7: Move cpumask file to top folder of hv-24x7 driver	2020-08-21 23:35:27 +10:00
accounting
admin-guide	A set of EFI fixes:	2020-08-23 11:08:32 -07:00
arm	ARM development for 5.9-rc1:	2020-08-06 10:17:00 -07:00
arm64	IOMMU Updates for Linux v5.9	2020-08-11 14:13:24 -07:00
block	for-5.9/drivers-20200803	2020-08-05 10:51:40 -07:00
bpf	doc: Add link to bpf helpers man page	2020-08-13 22:48:06 +02:00
cdrom	A handful of obvious fixes that wandered in during the merge window.	2020-08-13 13:57:45 -07:00
core-api	A handful of obvious fixes that wandered in during the merge window.	2020-08-13 13:57:45 -07:00
cpu-freq
crypto	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
dev-tools	A handful of obvious fixes that wandered in during the merge window.	2020-08-13 13:57:45 -07:00
devicetree	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-08-23 10:52:33 -07:00
doc-guide
driver-api	- Core Frameworks	2020-08-15 08:09:38 -07:00
fault-injection	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
fb	drm next for 5.9-rc1	2020-08-05 19:50:06 -07:00
features	s390/pci: Implement ioremap_wc/prot() with MIO	2020-09-14 10:30:07 +02:00
filesystems	Improvements to ext4's block allocator performance for very large file	2020-08-21 11:03:38 -07:00
firmware_class
firmware-guide	ACPI: Replace HTTP links with HTTPS ones	2020-07-27 14:47:08 +02:00
fpga	Char/Misc driver patches for 5.9-rc1	2020-08-05 11:43:47 -07:00
gpu	- Core Frameworks	2020-08-11 13:48:02 -07:00
hid	docs: hid: Convert link to https	2020-07-13 11:26:37 -06:00
hwmon	hwmon updates for v5.9	2020-08-05 13:13:57 -07:00
i2c	Merge branch 'i2c/for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2020-08-13 18:41:00 -07:00
ia64	docs: ia64: correct typo	2020-07-31 11:09:09 -06:00
ide
iio
infiniband
input	Input: uinput - fix typo in function name documentation	2020-07-28 18:24:11 -07:00
isdn
kbuild	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
kernel-hacking
leds	LEDs changes for 5.9-rc1.	2020-08-05 19:24:27 -07:00
litmus-tests
livepatch
locking	A handful of obvious fixes that wandered in during the merge window.	2020-08-13 13:57:45 -07:00
m68k
maintainer	Documentation: maintainer-entry-profile: eliminate duplicated word	2020-07-13 09:44:07 -06:00
mhi
mips	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
misc-devices	Documentation: misc/xilinx_sdfec: eliminate duplicated word	2020-07-13 09:44:07 -06:00
netlabel
networking	docs: networking: bonding.rst resources section cleanup	2020-08-14 16:44:20 -07:00
nios2
nvdimm
openrisc	docs: openrisc: Replace HTTP links with HTTPS ones	2020-07-13 11:34:09 -06:00
parisc
PCI	pci-v5.9-changes	2020-08-07 18:48:15 -07:00
pcmcia
power	Merge branches 'pm-sleep', 'pm-domains', 'powercap' and 'pm-tools'	2020-08-03 13:12:44 +02:00
powerpc	PPC KVM update for 5.9	2020-08-09 13:24:02 -04:00
process	A handful of obvious fixes that wandered in during the merge window.	2020-08-13 13:57:45 -07:00
RCU	These are the latest RCU bits for v5.9:	2020-08-03 14:31:33 -07:00
riscv
s390	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
scheduler	sched/doc: Factorize bits between sched-energy.rst & sched-capacity.rst	2020-08-01 09:19:43 +02:00
scsi	scsi: advansys: docs: Eliminate duplicated word	2020-07-08 01:32:11 -04:00
security	Documentation: security/keys: eliminate duplicated word	2020-07-13 09:45:03 -06:00
sh
sound	ASoC: Updates for v5.9	2020-08-03 14:41:43 +02:00
sparc
sphinx
sphinx-static
spi	SPI SUBSYSTEM: Replace HTTP links with HTTPS ones	2020-07-09 22:41:11 +01:00
staging	remoteproc updates for v5.9	2020-08-11 11:17:45 -07:00
target
timers	docs: timers: drop documentation about LB_BIAS	2020-07-23 14:32:44 -06:00
trace	A handful of obvious fixes that wandered in during the merge window.	2020-08-13 13:57:45 -07:00
translations	A handful of obvious fixes that wandered in during the merge window.	2020-08-13 13:57:45 -07:00
usb	USB: Replace HTTP links with HTTPS ones	2020-07-21 13:41:57 +02:00
userspace-api	remoteproc updates for v5.9	2020-08-11 11:17:45 -07:00
virt	powerpc updates for 5.9	2020-08-07 10:33:50 -07:00
vm	mm/vmstat: add events for THP migration without split	2020-08-12 10:57:57 -07:00
w1
watchdog	watchdog: add support for adjusting last known HW keepalive time	2020-08-05 18:43:02 +02:00
x86	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
xtensa
.gitignore
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py
COPYING-logo
docutils.conf
dontdiff	Documentation: dontdiff: Add zstd compressed files	2020-07-31 11:51:10 +02:00
index.rst	docs: index.rst: Add watch_queue	2020-07-23 14:13:23 -06:00
Kconfig
logo.gif
Makefile
memory-barriers.txt	powerpc updates for 5.9	2020-08-07 10:33:50 -07:00
SubmittingPatches
watch_queue.rst