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
PCI	pci-v5.9-changes	2020-08-07 18:48:15 -07:00
RCU	These are the latest RCU bits for v5.9:	2020-08-03 14:31:33 -07:00
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	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
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-guide	ACPI: Replace HTTP links with HTTPS ones	2020-07-27 14:47:08 +02:00
firmware_class	…
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	Documentation/litmus-tests: Add note on herd7 7.56 in atomic litmus test	2020-06-29 12:05:18 -07:00
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	…
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
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	docs: sh: convert register-banks.txt to ReST	2020-06-19 14:10:13 -06:00
sound	ASoC: Updates for v5.9	2020-08-03 14:41:43 +02:00
sparc	…
sphinx	Replace HTTP links with HTTPS ones: Documentation/sphinx/parse-headers.pl	2020-06-26 10:57:33 -06:00
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	doc: don't use deprecated "---help---" markers in target docs	2020-06-13 13:32:40 -07:00
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	…
COPYING-logo	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
Changes	…
CodingStyle	…
Kconfig	…
Makefile	media updates for v5.8-rc1	2020-06-03 20:59:38 -07:00
SubmittingPatches	…
asm-annotations.rst	…
atomic_bitops.txt	…
atomic_t.txt	Documentation/litmus-tests/atomic: Add a test for smp_mb__after_atomic()	2020-06-29 12:05:18 -07:00
conf.py	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
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
logo.gif	…
memory-barriers.txt	powerpc updates for 5.9	2020-08-07 10:33:50 -07:00
watch_queue.rst	…